RU2773578C1 - System, layout and method for heating and cooling - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention relates to a system, layout, and method for heating and cooling multiple rooms of a building or buildings. Heating and cooling system for air conditioning of multiple rooms of a building, containing a secondary heat network for circulation of a secondary working fluid, wherein the secondary heat network comprises a feeding line for circulation of a high-temperature secondary working fluid and a return line for circulation of a low-temperature secondary working fluid; two or more connecting lines provided in the secondary heat network, wherein each connecting line extends between the feeding line and the return line and is configured to interconnect the feeding line and the return line; two or more primary heat exchangers located in two or more connecting lines and configured to provide a primary heat exchange connection between the secondary heat network and the room of the building; and a geothermal heat exchanger located in connection with the secondary heat network. The geothermal heat exchanger comprises a geothermal network with an ascending pipe and a drain pipe, wherein the ascending pipe is located inside the drain pipe, and the ascending pipe of the geothermal heat exchanger is equipped with first heat insulation surrounding the ascending pipe and extending along at least part of the length of the ascending pipe from the surface of the ground, and the heating and cooling system comprises a first pump configured to control the geothermal heat exchanger in the heat extraction mode, wherein the secondary working fluid circulates downwards in the drain pipe and upwards in the ascending pipe, and a second pump configured to control the geothermal heat exchanger in the heat supply mode, wherein the secondary working fluid circulates downwards in the ascending pipe and upwards in the drain pipe.

EFFECT: provided system for heating and cooling, layout and method for heating and cooling multiple rooms of a building or buildings with structural simplification.

13 cl, 15 dwg

Description

FIELD OF TECHNOLOGY

The present invention relates to a heating and cooling system and, more specifically, to a heating and cooling system, in particular, according to the preamble of claim 1 of the claims. The present invention also relates to an arrangement for heating and cooling several rooms of a building or buildings, and more particularly to an arrangement according to the preamble of claim 6. The present invention further relates to a method for heating and cooling multiple rooms of a building or buildings, and more particularly to a method according to the preamble of claim 12 of the claims.

BACKGROUND OF THE INVENTION

District heating and cooling or district heating and cooling are well-known systems in which heating energy or cooling energy is generated in a centrally located plant or centrally located source and distributed through a pipeline network to several buildings. The source of heating energy in district heating systems is a power plant or industrial plant that can generate heating energy for distribution to all buildings. Generally, all buildings receive heating energy in the same way and can use or consume heating energy according to the needs of the building. The source of energy for cooling in district cooling systems is typically a large water reservoir or lake or sea, from which cold water is distributed to all buildings. Generally, all buildings receive cooling energy in the same way and can use or consume cooling energy according to the needs of the building. The buildings have a heat exchanger in which the heating energy or the cooling energy of the secondary working fluid flow of the district heating system and its piping network is transferred to the building's primary working fluid for heating and cooling the building. The primary working fluid may be, for example, heating or cooling air supplied to the building, or water flowing through the building's heating system.

A disadvantage of known district heating and cooling systems is that they are complex and do not take into account the individual needs of different buildings. This means that in district heating, all buildings receive heating energy through the pipeline network, and each building can only decide how much heating energy it will use. Likewise, in district cooling, all buildings receive cooling energy through a pipe network, and each building can only decide how much cooling energy to use. Accordingly, buildings cannot choose between heating and cooling. In addition, often the sources of heating and cooling are different, and the networks for heating and cooling may also be different. This makes known systems even more complex.

disclosure

It is an object of the present invention to provide a heating and cooling system and an arrangement and method for heating and cooling multiple rooms of a building or buildings in order to solve or at least overcome the shortcomings of the prior art. The objectives of the invention are solved by means of a heating and cooling system, which is characterized by what is indicated in the independent claim 1 of the claims. The objects of the present invention are also solved by means of an arrangement for heating and cooling several rooms of a building or buildings, which is characterized by what is indicated in the independent claim 6 of the claims. The objects of the present invention are further solved by a method for heating and cooling several rooms of a building or buildings, which is characterized by what is indicated in independent claim 12 of the claims.

Preferred embodiments of the invention are disclosed in the dependent claims.

The invention is based on the idea of providing a heating and cooling system for air conditioning several rooms in a building.

The heating and cooling system contains:

a secondary heating network for circulating a secondary working fluid, the secondary heating network comprising a supply line for circulating a high temperature secondary working fluid and a return line for circulating a low temperature secondary working fluid;

- two or more connecting lines provided in the secondary heat network, each connecting line extending between the supply line and the return line and configured to connect the supply line and the return line to each other;

- two or more primary heat exchangers located in two or more connecting lines and configured to provide a primary heat exchange connection between the secondary heat network and the building premises; and

- geothermal heat exchanger located in connection with the secondary heating network.

According to the present invention, the geothermal heat exchanger comprises a geothermal network having an ascender and a downcomer. The riser is located inside the downcomer, and the riser of the geothermal heat exchanger is provided with a first thermal insulation surrounding the riser and extending at least along a portion of the length of the riser from the earth's surface.

The coaxial design of the geothermal heat exchanger, together with thermal insulation in the ascending pipe, allows the use of deep geothermal energy at higher geothermal temperatures in conjunction with the secondary heating network. In addition, this makes it possible to use the geothermal heat exchanger and the hole in the ground in which it is installed, both as a heat source and as a heat sink, depending on the need of the secondary heating network.

According to the above, the present invention provides a heating and cooling system in which two or more rooms of a building or buildings can be arranged in parallel with each other in a secondary heat network. This makes it possible to introduce two or more rooms of a building or buildings into a heat exchange connection with each other by means of a secondary heating network. In addition, the premises of the building or building are additionally located in a heat exchange connection with a geothermal heat exchanger located in connection with the secondary heat network.

The geothermal heat exchanger may include a riser and a downcomer, and a secondary heat supply line connected to the riser and configured to be in fluid communication with the riser to provide secondary working fluid flow between the riser and the feed. In addition, the return line of the secondary heat network may be connected to the drain pipe and configured to be in fluid communication with the drain pipe to allow the flow of the secondary working fluid between the drain pipe and the return line.

The riser is directly connected to the flow line so that the secondary working fluid can flow along the riser and the flow line. In addition, the drain pipe is directly connected to the return line so that the secondary working fluid can flow along the drain pipe and the return line.

In an alternative embodiment, the geothermal heat exchanger may include a riser and a downcomer configured to provide a geothermal network to circulate the geothermal working fluid along the riser and downcomer, and the heating and cooling system may further comprise a secondary heat exchanger disposed between the secondary heating network and a geothermal network, wherein the secondary heat exchanger may be configured to provide a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid.

Thus, there is no direct connection between the secondary heating network and the geothermal network, or between the riser pipe and the flow line and between the drain pipe and the return line. However, the geothermal network and secondary heat network are located in a heat exchange junction. Thus, a geothermal working fluid can flow in a geothermal network, and a secondary working fluid can flow in a secondary heating network. The geothermal working fluid and the secondary working fluid may be located in a heat exchange connection by means of a secondary heat exchanger.

In one embodiment, the secondary heat exchanger is a secondary heat pump located between the secondary heat network and the geothermal network. The secondary heat pump is configured to provide a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid.

Thus, the premises of the building or building are additionally located in heat exchange connection with a geothermal heat exchanger located in connection with the secondary heat network by means of a secondary heat pump. Thus, the geothermal network and the secondary heat network are separate networks that are introduced into the secondary heat exchange connection by means of a secondary heat pump. The secondary heat pump enables the use of different temperatures and different working fluids in the geothermal network and in the secondary heat network. Thus, low temperatures in the ground can be effectively used in the secondary heating network.

In one embodiment, the geothermal network is located in heat exchange connection with the secondary heat exchanger, and the secondary heat network is located in heat exchange connection with the secondary heat exchanger to provide a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid. Thus, the secondary heat pump or secondary heat exchanger provides heat exchange between the geothermal network and the secondary thermal network and between the geothermal working fluid and the secondary working fluid.

The secondary heat network may comprise a first secondary heat subnetwork, a second secondary heat subnetwork, and a subnetwork heat exchanger provided between the first secondary heat subnetwork and the second secondary heat subnetwork and configured to provide subnetwork heat exchange between the first secondary heat subnetwork and the second secondary heat subnetwork.

Accordingly, the secondary heating network can be divided into two or more sub-networks connected to each other by means of sub-network heat exchangers. Each of the secondary heat subnets contains a supply line and a return line. The supply lines of two or more secondary heat subnets form the supply line of the common secondary heat network, and the return lines of two or more secondary heat subnets form the return line of the common secondary heat network. In addition, at least two of the secondary heat subnets contain one or more connecting lines passing between the supply line and the return line and configured to connect the supply line and the return line of the secondary heat subnet with each other, and one or more primary heat exchangers located in two or more connecting lines.

In an alternative implementation, the secondary heat network may comprise a first secondary heat subnetwork, a second secondary heat subnetwork, and a subnetwork heat pump provided between the first secondary heat subnetwork and the second secondary heat subnetwork and configured to provide subnetwork heat exchange between the first secondary heat subnetwork and the second secondary heat subnetwork. subnet.

The heat pump between the first and second secondary heat subnets enables temperature control of the secondary working fluid between the first and second secondary heat subnets, or between the respective supply or return lines of the first and second secondary heat subnets.

The system may include a first pump configured to control the geothermal heat exchanger in a heat recovery mode, in which the secondary working fluid is circulated down in the downcomer and up in the riser, and a second pump, configured to control the geothermal heat exchanger in the heat supply mode, in in which the secondary working fluid circulates down in the riser and up in the downcomer.

In an alternative embodiment, the system may include a first pump, which may be a reversible pump configured to selectively control the geothermal heat exchanger in a heat recovery mode in which the secondary working fluid is circulated down in a downcomer and up in a riser, and in a supply mode. heat in which the secondary working fluid circulates down in the riser and up in the downcomer.

Thus, the geothermal heat exchanger can be used to supply heating energy to the secondary heat network, or its supply line, and to receive heating energy from the secondary heat network, or its supply line, to the geothermal heat exchanger. Thus, the need for clean or total energy for heating the secondary heating network or the building or building spaces can be taken into account in the use of a geothermal heat exchanger.

The riser of the geothermal heat exchanger may be provided with a first thermal insulation surrounding the riser extending along at least a portion of the length of the riser from the earth's surface.

In an alternative implementation, the riser of the geothermal heat exchanger may be a vacuum tube containing a vacuum layer surrounding the flow path of the riser. The vacuum layer may be configured to form a first thermal insulation extending along at least a portion of the length of the ascending pipe.

In a further alternative embodiment, the riser of the geothermal heat exchanger may comprise a layer of insulating material on the outer surface or on the inner surface of the riser. The layer of insulating material is configured to form a first thermal insulation extending along at least part of the length of the ascending pipe.

Further, the riser pipe of the geothermal heat exchanger may include an inner pipe wall, an outer pipe wall, and a layer of insulating material provided between the inner pipe wall and the outer pipe wall of the riser pipe. The layer of insulating material is configured to form a first thermal insulation surrounding the ascending pipe and extending at least along a part of the length of the ascending pipe.

The first thermal insulation prevents heat transfer from the riser to the ground along the riser, preferably from the surface of the earth along the riser to the bottom end of the riser and the bottom end of the hole in the ground. Accordingly, the geothermal working fluid or secondary working fluid can be transferred from the lower end of the riser to the earth's surface such that heat transfer is limited and the temperature of the geothermal working fluid or secondary working fluid can be maintained high. In addition, the geothermal working fluid or secondary working fluid can be transferred from the earth's surface to the lower end of the riser so that heat transfer is limited and the temperature of the geothermal working fluid or secondary working fluid can be maintained high.

The two or more connecting lines may be equipped with a connecting pump configured to circulate a secondary working fluid between the supply line and the return line.

In addition, at least one of the two or more connecting lines can be equipped with a first connection pump configured to circulate the secondary working fluid in the direction from the supply line to the return line, and a second connecting pump configured to circulate the secondary working fluid. in the direction from return line to return line.

In an alternative implementation, at least one of the two or more connecting lines may be equipped with a first connection pump, which may be a reversible pump, configured to selectively circulate the secondary working fluid in the direction from the supply line to the return line and in the direction from the return line. line to return line.

Accordingly, each of the parallel connecting lines provided between the supply line and the return line can circulate the secondary working fluid from the supply line to the return line, or from the return line to the supply line, or from the supply line to the return line and from the return line to flow line based on the operating mode of the primary heat exchanger. This may allow fluid connection lines to communicate with each other via a flow line and a return line and/or a heat exchange connection with each other via a flow line and a return line.

The primary heat exchanger may be a heat pump, or a heat pump configured to circulate the heat pump working fluid in the heat pump and comprising a compressor and an evaporator. The heat pump may be capable of using a low temperature secondary working fluid to heat a building space or building or supply high temperature water to a building.

The primary heat exchanger may be a heat pump, and the heating and cooling system may include a solar energy device provided in connection with a building or building space and connected to the heat pump to supply solar energy to the heat pump and operate the heat pump.

This provides the possibility of using solar energy in heating and cooling and additionally the possibility of improving the energy efficiency of the system in terms of energy autonomy.

The present invention further relates to an arrangement for heating and cooling multiple rooms of a building or buildings.

The layout may include two or more rooms of the building or buildings and a secondary heat network for circulation of the secondary working fluid. The secondary heat network may include a supply line for circulating a high temperature secondary working fluid and a return line for circulating a low temperature secondary working fluid. The layout further comprises two or more building connections located parallel to each other and between the supply line and the return line of the secondary heat network. The two or more building connections may comprise a primary heat exchanger located in connection with two or more building rooms or buildings. The arrangement may further comprise a hole in the ground provided in the ground and extending from the surface of the ground, and a geothermal heat exchanger provided in the hole in the ground and located in connection with the secondary heat network.

According to the present invention, the depth of the hole in the ground is at least 300, and the arrangement comprises a geothermal heat exchanger provided in the hole in the ground having a depth of at least 300 m and located in connection with the secondary heat network.

The arrangement thus provides two or more parallel building connections that are connected to each other and to the geothermal heat exchanger in the hole in the ground via a secondary heating network. The arrangement thus enables the buildings or rooms of the building to exchange energy with each other for heating and with the geothermal heat exchanger.

In addition, a hole in the ground at least 300 meters deep allows higher temperatures to enter the ground. The temperature in the ground increases with depth. Access to high temperatures provides a more efficient secondary heating network, since temperature changes within the layout must be less. In addition, the deep hole in the ground makes it possible to efficiently store excess energy for heating buildings or rooms of the building without leakage of energy for heating from the hole in the ground.

The primary heat exchangers of two or more building connections may be located in connection with different areas of the building.

The primary heat exchangers of two or more building connections can be connected to the heat networks of the building rooms of different building rooms. Heat networks of the premises of the building can be made with the possibility of circulation of the primary working fluid of the premises of the building.

In an alternative implementation, two or more primary heat exchangers of two or more building connections may be located in connection with different buildings.

Two or more primary heat exchangers of two or more building connections may be connected to the building heat networks of different buildings. The heating networks of the premises of the building are made with the possibility of circulation of the primary working fluid of the building.

Accordingly, in the arrangement, building connections can be provided in connection with different building spaces or different buildings or with different building spaces and different buildings. This provides a flexible and most efficient way to use energy for heating between buildings and building spaces.

The geothermal heat exchanger may be connected to the secondary heat network and the geothermal heat exchanger, and the secondary heat network may be configured to be in fluid communication with each other to circulate the secondary working fluid in the geothermal heat exchanger.

Thus, the secondary working fluid can flow in the secondary heat network as well as in the geothermal heat exchanger.

In an alternative implementation, the geothermal heat exchanger may be located in a heat exchange connection with the secondary heat network, and the secondary heat exchanger may be provided between the geothermal heat exchanger and the secondary heat network to provide heat exchange between the secondary heat network and the geothermal heat exchanger.

Thus, the geothermal working fluid can be separately circulated in the geothermal heat exchanger, and the secondary working fluid can be separately circulated in the secondary heat network. Heat exchange between the geothermal working fluid and the secondary working fluid is carried out using a secondary heat exchanger.

In one embodiment, the secondary heat exchanger is a secondary heat pump located between the secondary heat network and the geothermal network. The secondary heat pump is configured to provide a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid. The secondary heat pump enables the use of different temperatures and different working fluids in the geothermal network and in the secondary heat network. Thus, low temperatures in the ground can be effectively used in the secondary heating network.

In one embodiment, the geothermal network is located in a heat exchange connection with the secondary heat exchanger, and the secondary heat network is located in a heat exchange connection with the secondary heat exchanger or provides a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid. Thus, the secondary heat pump or secondary heat exchanger provides secondary heat exchange between the geothermal network and the secondary thermal network and between the geothermal working fluid and the secondary working fluid.

Thus, the pipes or ducts of the geothermal network and the pipes or ducts of the secondary heating network are not located in fluid communication with each other, but are separated from each other. This allows the geothermal network and the secondary heat network to operate at different temperatures, and the geothermal working fluid and the secondary working fluid can be separate working fluids, if necessary. Thus, the geothermal working fluid can be separately circulated in the geothermal heat exchanger, and the secondary working fluid can be separately circulated in the secondary heat network. Heat exchange between the geothermal working fluid and the secondary working fluid is carried out using a secondary heat pump.

The secondary heat network may comprise two or more secondary heat subnets located in heat exchange connection with each other.

In an alternative implementation, the secondary heat network may contain two or more secondary heat subnets. A subnet heat exchanger may be located between two or more secondary heat subnets to allow heat exchange between two or more secondary heat subnets.

In a further alternative implementation, the secondary heat network may comprise two or more secondary heat subnets. A subnet heat exchanger or a subnet heat pump may be located between two or more secondary heat subnets to allow heat exchange between two or more secondary heat subnets.

Accordingly, the secondary heat network can be divided into two or more secondary heat subnets that are located in heat exchange connection with each other.

Two or more parallel building connections may be connected to each other via the supply and return lines of two or more secondary heat sub-networks and are arranged in connection with each other to transfer heat via the supply and return lines.

In an alternative implementation, the secondary heat network may contain two or more secondary heat subnets. One or more sub-network heat pumps may be located between two or more secondary heat sub-networks to provide a heat exchange connection between the two or more secondary heat sub-networks. At least two of the two or more secondary heat subnets may contain one or more building connections. Building connections can be connected to each other via two or more secondary heat subnets and one or more subnet heat pumps and can be located in connection with each other with the ability to transfer heat through two or more secondary heat subnets and one or more subnet heat pumps.

The heat pump(s) of the subnets can control, increase and decrease the temperature of the secondary working fluid flowing in the connected secondary heat subnets.

The arrangement of the present invention may include a heating and cooling system as mentioned above.

The present invention further relates to a method for heating and cooling multiple rooms of a building or buildings.

The method may include:

- circulation of the secondary working fluid in the secondary heating network,

- the implementation of two or more first stages of heat exchange in parallel in the secondary heat network between the secondary working fluid and the primary working fluid of the premises of the building or building located in connection with two or more other rooms of the building or buildings;

- performing a second stage of heat exchange between the secondary working fluid circulating in the secondary heating network and the ground with a geothermal heat exchanger located in a hole in the ground and located in connection with the secondary heating network.

According to the present invention, the method includes performing a second stage of heat exchange between the secondary working fluid circulating in the secondary heating network and the ground with a geothermal heat exchanger in a hole in the ground. The hole in the ground is at least 300 m deep.

In addition, a hole in the ground at least 300 meters deep allows the second stage of heat exchange to be carried out at higher temperatures in the ground. The temperature in the ground increases with depth. Access to higher temperatures provides a more efficient process because temperature changes in the process must be smaller. In addition, the deep hole in the ground makes it possible to efficiently store excess energy for heating buildings or rooms of the building without leakage of energy for heating from the hole in the ground.

The parallel first exchange stages allow the heat exchange of the parallel first exchange stages to be combined with each other and with the second heat exchange stage.

The second heat exchange step may include circulating the secondary working fluid in the geothermal heat exchanger and performing heat exchange between the secondary working fluid and the ground in a hole in the ground.

Thus, the secondary working fluid can be used in the first and second heat exchange steps.

In an alternative implementation, the second heat exchange step may include circulating the geothermal working fluid in the geothermal heat exchanger, performing heat exchange between the secondary working fluid circulating in the secondary heat network and the geothermal working fluid circulating in the geothermal heat exchanger, and performing heat exchange between the geothermal working fluid environment and earth in a hole in the earth.

Accordingly, the geothermal working fluid and the secondary working fluid can circulate separately and can be located in heat exchange connection with each other.

In one embodiment, the second heat exchange step includes circulating a geothermal working fluid in a geothermal network provided in a geothermal heat exchanger in the ground, performing a second heat exchange step with a secondary heat exchanger or secondary heat pump between the secondary working fluid circulating in the secondary heating network and the geothermal working fluid. a fluid circulating in the geothermal network, and performing a geothermal heat exchange step between the geothermal working fluid and the earth with the geothermal heat exchanger disposed in a hole in the earth.

Accordingly, the geothermal working fluid and the secondary working fluid can circulate separately and can be located in heat exchange connection with each other with a secondary heat pump or a secondary heat exchanger.

Thus, the premises of the building or building are additionally located in heat exchange connection with a geothermal heat exchanger located in connection with the secondary heat network by means of a secondary heat pump. Thus, the geothermal network and the secondary heat network are separate networks that are introduced into the secondary heat exchange connection by means of a secondary heat pump or a secondary heat exchanger. The secondary heat pump enables the use of different temperatures and different working fluids in the geothermal network and in the secondary heat network. Thus, low temperatures in the ground can be effectively used in the secondary heating network.

The method may further include operating the geothermal heat exchanger in a heat recovery mode wherein the second heat exchange step includes transferring heat energy from the ground to a secondary working fluid or to a geothermal working fluid in the geothermal heat exchanger.

In an alternative implementation, the method may include operating the geothermal heat exchanger in a heat supply mode, in which the second heat exchange step includes transferring energy for heating from the secondary working fluid or from the geothermal working fluid to the ground in the geothermal heat exchanger.

Thus, the geothermal heat exchanger can be used in the extraction or supply mode based on the clean energy demand for heating or the excess of the parallel first heat exchange steps.

The method may also include performing at least one of two or more parallel first heat exchange steps in a heating mode in which energy for heating is transferred from the secondary working fluid to the primary working fluid of the building or building spaces.

Alternatively or additionally, the method may include performing at least one of two or more parallel first heat exchange steps in a cooling mode in which energy for heating is transferred from the primary working fluid of the building or building spaces to the secondary working fluid.

In a further alternative implementation, the method may comprise performing at least one of two or more parallel first heat exchange steps in a heating mode in which energy for heating is transferred from the secondary working fluid to the primary working fluid of the building or building spaces, and performing at least at least one of two or more first stages of primary heat exchange in the cooling mode, in which energy for heating is transferred from the primary working fluid of the premises of the building or building to the secondary working fluid.

Thus, each of the first heat exchange steps can be carried out in a heating or cooling mode independently of the other first heat exchange steps.

The method may include performing two or more parallel first heat exchange steps with two or more parallel primary heat exchangers provided in connection with two or more different building spaces, operating at least one of the two or more primary heat exchangers in a heating mode in which the energy for heating is transferred from the secondary working fluid to the primary working fluid of the building or building spaces, and operating at least one of the two or more primary heat exchangers in a cooling mode in which energy for heating is transferred from the primary working fluid of the building or building spaces to the secondary working fluid. fluid environment. The method may further include performing district heat exchange between at least one of the two or more primary heat exchangers operating in heating mode and at least one of the two or more primary heat exchangers operating in cooling mode via a secondary heating network.

The method may further include circulating the high temperature secondary working fluid in the secondary heating supply line and the low temperature secondary working fluid in the return line of the secondary heating network, and increasing the temperature in the high temperature secondary working fluid circulating in the secondary heating supply line and decreasing the temperature low-temperature secondary working fluid circulating in the return line of the secondary heating network, by using a heat pump located in the secondary heating network between the flow line and the return line.

The advantage of the invention is that the system, arrangement and method combine district and local heating as well as heating and cooling. The present invention makes it possible to heat and cool different buildings and rooms of a building separately and additionally to exchange thermal energy with each other. Thus, different buildings or building spaces can use each other's heat energy, and only net or total heat energy, needed or surplus, can be extracted from or supplied to the geothermal heat exchanger that is connected to the buildings or building spaces, respectively. In addition, the geothermal heat exchanger can be used in heat recovery mode, when the net heat demand of buildings or building spaces is negative, and in heat supply mode, when the net heat demand of buildings or building spaces is positive. In the heat recovery mode, the heating energy is supplied from the ground to the geothermal heat exchanger and further to the secondary heating network. In the heat supply mode, the energy for heating is supplied from the secondary heating network to the geothermal heat exchanger and further into the ground.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is described in more detail by way of specific embodiments with reference to the accompanying drawings, in which:

Fig. 1 schematically shows a geothermal heat exchanger in diversion mode;

Fig. 2 schematically shows a geothermal heat exchanger in supply mode;

Fig. 3 schematically shows the essence of the heating and cooling system according to the present invention;

Fig. 4 shows a modification of the system of FIG. 3 with secondary heat exchanger;

Fig. 5 schematically shows a heat pump used in a heating and cooling system;

Fig. 6 schematically shows a secondary heat pump used in the present invention;

Fig. 7 schematically shows one embodiment of a heating and cooling system according to the present invention;

Fig. 8 shows a modification of the system of FIG. 3 with secondary heat exchanger;

Fig. 9 schematically shows another embodiment of a heating and cooling system according to the present invention;

Fig. 10, 11, 12 and 13 schematically show alternative embodiments of the heating and cooling system according to the present invention;

Fig. 14 shows one embodiment of a geothermal heat exchanger; and

Fig. 15 shows another embodiment of a geothermal heat exchanger.

IMPLEMENTATION OF THE INVENTION

Fig. 1 shows a geothermal heating device. The geothermal heating device comprises a hole 2 in the ground or a drilling hole made in the ground and extending down into the ground from the ground surface 1. The hole 2 in the ground may be made by drilling or other excavation.

In the context of the present application, the depth of the hole 2 in the ground from the ground surface 1 may be at least 300 m, or at least 500 m, or from 300 m to 3000 m, or from 500 m to 2500 m. Alternatively or additionally, the hole 2 in the ground extends into the ground to a depth at which the temperature is at least 15°C, or approximately 20°C, or at least 20°C.

Hole 2 in the ground can extend to a depth below the water table in the ground, that is, through the water table. In an alternative embodiment, the hole 2 in the ground may extend to a depth above the water table in the ground.

It should be noted that in the drawings, similar structural parts and structures are identified by the same reference signs and their description is not repeated with respect to each drawing.

It should be noted that according to the present invention, the geothermal heat exchanger can be used in a heat recovery mode or a heat supply mode.

In addition, in the present application, the hole 2 in the ground can be any type of hole extending into the ground, it can be a vertical hole, a straight vertical or other straight hole extending into the ground at an angle to the surface 1 of the earth or to the vertical direction. In addition, the hole 2 in the ground may optionally have one or more bends, and the direction of the hole in the ground may change one or more times along the length of the earth to the lower end or bottom of the hole 2 in the ground. Additionally, it should be noted that the shape or geometry of the riser or downcomer of the geothermal heat exchanger can preferably match the shape or geometry of the hole 2 in the ground, at least substantially to ensure proper installation of the riser and downcomer in the hole 2 in the ground. Preferably, the hole 2 in the ground extends to a depth as indicated above, but it may have one or more bends along its length, or it may be straight.

The earth material at the lower end 4 of the hole 2 in the earth is usually stone material. Accordingly, the earth or rock material of the earth may form the surface of the hole 2 in the earth or the inner surface of the riser or downcomer of the geothermal heat exchanger along at least a portion of the length of the riser or downcomer of the geothermal heat exchanger.

Presented is a geothermal heat exchanger 55 located in connection with a hole 2 in the ground. The geothermal heat exchanger 55 includes a piping arrangement in which a working fluid circulates. The piping arrangement typically comprises a closed array of pipes configured to provide closed circulation of the working fluid. The working fluid is typically a liquid, such as water or a methanol or ethanol based working fluid. The pipe arrangement comprises an ascending pipe 11 and a drain pipe 21 located in the hole 2 in the ground in such a way that they extend from the surface 1 of the earth to the bottom 4 of the hole 2 in the ground. The ascending pipe 11 and the downcomer 21 are in fluid communication with each other at the lower ends of the ascending pipe 11 and the downcomer 21 or at the lower end 4 of the hole 2 in the ground to circulate the working fluid in the hole 2 in the ground between the ascending pipe 11 and the downcomer 21. One or more ascending pipes 11 and downcomers 21 can be provided located in the same or different holes 2 in the ground.

In the embodiment of FIG. 1, there is no separate drain pipe 21, but an opening 2 in the ground is configured to form a drain pipe 21. This allows efficient heat transfer between the geothermal working fluid and the earth. In this embodiment, the earth may consist of stones, which allows the earth to be used as the downcomer 21. In this embodiment, the riser 11 is located inside the drain pipe 21. The riser 11 and the downcomer 21 may be located inside each other or coaxially and/ or parallel to each other and inside each other. However, it should be noted that similarly, the drain pipe 21 can be located inside the riser pipe 11. The heat pump 30 and the riser pipe 11 can be connected to each other by the first connection pipe 3, and the heat pump 30 and the drain pipe 21 can be connected to each other. the other by means of the second connection pipe 5. The first connection pipe 3 may form part of the ascending pipe 11, and the second connection pipe 5 may form part of the downcomer pipe 5.

The geothermal heat exchanger 55 of FIG. 1 comprises a first pump 8 disposed in the piping arrangement for circulating the working fluid in the piping arrangement in heat supply mode of the geothermal heat exchanger 55 in which the working fluid is circulated towards the lower end 17 of the ascending pipe 11 or down in the ascending pipe 11 and up drain pipe 21 as indicated by arrows 22 and 12. The first pump 8 may be any kind of known pump capable of circulating a working fluid. The geothermal heat exchanger 55 further comprises a second pump 9 configured to circulate the working fluid down the downcomer 21 and up the riser 11 when the geothermal heat exchanger and the geothermal heating arrangement are in heat recovery mode. The second pump 9 may be any kind of known pump capable of circulating a working fluid. Accordingly, the first pump 8 is configured to operate in a heat supply mode and the second pump 9 in a heat extraction mode.

The first pump 8 can be made with or located in connection with the first connecting pipe 3 or drain pipe 11. The second pump 9 can be made with or located in connection with the second connecting pipe 5 or drain pipe 21.

Fig. 1 shows a geothermal heat exchanger 55 in a heat recovery mode in which the working fluid receives energy to heat from the ground at the hole 2 in the ground and circulates the heated working fluid upward in the riser 11 as indicated by arrow 22. The working fluid provides energy for heating in the heat pump 30, for example, the room of the building. Thus, the cold working fluid stream 54 receives thermal energy in the heat pump 30 and becomes the heated working fluid stream 52. At the same time, the temperature of the working fluid flow circulating in the geothermal heat exchanger 55 decreases, and the cooled working fluid returns to the hole 2 in the ground through the drain pipe 21, and again receives heat energy from the ground, as shown by arrows C. Thus, when the geothermal heat exchanger is operating in a heat recovery mode, the heat pump 30 is operating in a heating mode in which the working fluid receives energy for heating from the geothermal heat exchanger 55.

Fig. 2 shows a geothermal heat exchanger 55 in a heat supply mode in which the working fluid gives off energy to heat the ground at the hole 2 in the ground and circulates the cooled working fluid upward in the downcomer 21 as indicated by arrow 12. The working fluid receives energy to heat in the heat pump 30, for example, from the premises of the building. Thus, the heated primary working fluid stream 51 gives off thermal energy to the heat pump 30 and becomes the cooled primary working fluid stream 53. At the same time, the temperature of the working fluid flow circulating in the geothermal heat exchanger 55 increases, and the heated working fluid returns to the hole 2 in the earth along the ascending pipe 11, and again gives off heat energy to the earth, as shown by arrows C. Thus, when the geothermal heat exchanger operates in a heat supply mode, the heat pump 30 operates in a cooling mode in which the primary working fluid provides energy to heat the geothermal heat exchanger 55.

In the embodiment of FIG. 2, only the first pump 8 is provided. The first pump 8 may be a reversible pump configured to pump the working fluid down the riser 10 and up the downcomer 20, or alternatively down the downfall 20 and up the riser. 10. The first of these is the supply mode in which heat energy is supplied to the ground, and the second of these is the reverse mode and, meaning extraction, the mode in which the output heat energy is extracted from the ground.

As shown in FIG. 1 and 2, the first thermal insulation 25 extends from the surface 1 of the earth to the lower end 17 of the ascending pipe 11 along the ascending pipe 11. In this way, the first thermal insulation 25 can extend along the entire length of the ascending pipe 11, at least inside the hole 2 in the ground or drain pipe. 21. The first thermal insulation 25 may also extend along the entire length of the ascending pipe 11. In these embodiments, the ascending pipe 11 may be a vacuum pipe containing a vacuum layer surrounding the flow path of the ascending pipe 11. Thus, the vacuum layer is configured to form the first thermal insulation 25. It can also be equipped with any other insulating material. The riser 11 may include an inner pipe wall, an outer pipe wall, and a layer 25 of insulating material provided between the inner pipe wall and the outer pipe wall of the ascender 11.

The thermal insulation layer or first thermal insulation 25 may be formed from any suitable material that prevents or reduces heat transfer of the working fluid. Thermal insulation means a material capable of insulating against heat transfer, or a material with a relatively low thermal conductivity, used to protect a fluid from heat loss or penetration due to radiation, convection, or conduction. Several different thermal insulation materials or vacuum may be used.

The first thermal insulation 25 reduces or minimizes heat transfer to and from the working fluid stream 22 in the ascending pipe 11 so that the working fluid can be transferred in a heated form or at elevated temperatures to the lower end 17 of the first pipe 11 and to the lower end 4 of the opening 2 in the ground in heat supply mode. Accordingly, the working fluid gives off thermal energy C at elevated temperature to the ground surrounding the hole 2 in the ground at the lower end 4 of the hole 2 in the ground, and thus charges the thermal energy to the ground for later use, as shown in FIG. 2. This applies to all implementations that use the first thermal insulation 25. In addition, the first thermal insulation 25 reduces or minimizes heat transfer to and from the working fluid stream 22 in the ascending pipe 11 so that the working fluid can be transferred in a heated form or at elevated temperatures from the lower end 17 of the first pipe 11 and to the lower end 4 of the hole 2 in the ground in heat extraction mode, to the surface 1 of the earth. Accordingly, the working fluid receives thermal energy C at elevated temperature from the ground surrounding the hole 2 in the ground at the lower end 4 of the hole 2 in the ground, and thus extracts thermal energy from the ground to be transferred to the heat pump 30. This applies to all embodiments that use the first thermal insulation 25.

It should be noted that the drain pipe 21 can also be provided with a second thermal insulation extending from the ground surface to the lower end 4 of the hole 2 in the ground in a similar manner as the first thermal insulation 25.

Fig. 3 shows one embodiment of the present invention. The present invention provides a heating and cooling system for air conditioning multiple rooms in a building. The system contains a secondary heating network 3, 5 for circulation of the secondary working fluid. The secondary heat network comprises a supply line 3 in which a high temperature secondary working fluid circulates and a return line 5 in which a low temperature secondary working fluid circulates. In the secondary heating network, the supply line 3 and the return line 5 are connected to each other by two or more connecting lines or pipes 60, 61, 62, 63. Two or more connecting lines or pipes 60, 61, 62, 63 are located between the supply line 3 and return line 5 and are configured to connect the supply line 3 and the return line 5 to each other in such a way that the secondary thermal working fluid can flow between the supply line 3 and the return line 5 through two or more connecting lines 60, 61, 62, 63 Accordingly, the connecting lines 60, 61, 62, 63 are located parallel to each other in the secondary heating network and between the supply line 3 and the return line 5.

Two or more connecting lines 60, 61, 62, 63 are equipped with a primary heat exchanger 30, 31, 32, 33. The primary heat exchangers 30, 31, 32, 33 are configured to provide a primary heat exchange connection between the secondary heat network and the building room or building. Thus, the primary heat exchangers 30, 31, 32, 33 are located in connection with buildings or building spaces. Thus, the parallel primary heat exchangers 30, 31, 32, 33 can use the secondary working fluid circulating in the supply line 3 and return line 5 for primary heat exchange for buildings or building rooms.

The system further comprises at least one geothermal heat exchanger 55 located in connection with the secondary heating network. The geothermal heat exchanger 55 is equipped with a geothermal network 92 for circulating the geothermal working fluid in the geothermal heat exchanger 55 and in the hole 2 in the ground.

The riser pipe 10, 11 and downcomer pipe 20, 21 may form a geothermal network 92.

The geothermal heat exchanger 55 is preferably connected between the flow line 3 and the return line 5 directly or in a heat exchange connection so that the geothermal heat exchanger 55 can receive heat energy from the secondary heating network and remove heat energy from it.

In FIG. 3, the geothermal heat exchanger 55 includes an ascending pipe 10, 11 and a drain pipe 20, 21, and the geothermal heat exchanger is directly connected to the secondary heat network. Thus, the secondary heating supply line 3 is connected to the ascending pipe 10, 11 and is configured to be in fluid communication with the ascending pipe 10, 11 to provide a secondary working fluid flow between the ascending pipe 10, 11 and the supply line 3. Similarly, the return line 5 of the secondary heat network is connected to the drain pipe 20, 21 and is configured to communicate in fluid medium with the drain pipe 20, 21 to ensure the flow of the secondary working fluid between the drain pipe 20, 21 and the return line 5.

Accordingly, in this embodiment, the geothermal heat exchanger 55 is connected to the secondary heat network 3, 5, 60, 61, 62, 63, and the geothermal heat exchanger 55 and the secondary heat network 3, 5, 60, 61, 62, 63 are configured to communicate via fluid with each other to circulate the secondary working fluid in the geothermal heat exchanger 55.

The connection lines 60, 61, 62, 63 are provided with a connection pump 70, 71, 72, 73 configured to circulate the secondary working fluid between the supply line 3 and the return line 5. Thus, at least one of the two or more connection lines 60, 61, 62, 63 is equipped with a first connection pump 70, 71, 72, 73 configured to circulate a secondary working fluid in the direction from supply line 3 to return line 5, and a second connection pump 74 configured to circulate a secondary working fluid. fluid in the direction from return line 5 to return line 3. In an alternative implementation, at least one of the two or more connecting lines 60, 61, 62, 63 is equipped with a first connection pump 70, 71, 72, 73, which is a reversible a pump configured to selectively circulate the secondary working fluid in the direction from the supply line 3 to the return line 5 and in the direction from the return return line 5 to return line 3.

In the heating mode of the primary heat exchanger 30, 31, 33, the secondary working fluid delivers thermal energy to the building or building space, as shown in FIG. 3 by arrows 52. The secondary working fluid then circulates from the supply line 3 through the connecting lines 60, 61, 63 and the primary heat exchangers 30, 31, 33 to the return line 5. In the cooling mode of the primary heat exchanger 32, the secondary working fluid receives thermal energy from the building or building spaces, as shown in FIG. 3 by arrow 54. The secondary working fluid then circulates from return line 5 through connecting line 62 and primary heat exchanger 32 to supply line 3.

It should be noted that each of the primary heat exchangers 30, 31, 32, 33 can operate in cooling mode or in heating mode. Thus, the parallel primary heat exchangers 30, 31, 32, 33 are located in heat exchange connection with each other via the secondary heating network and the flow line 3 and return line 5. Thus, the primary heat exchanger(s) 32 operating (s) in cooling mode , can supply heating energy to the supply line 3, and this heating energy can be used by the primary heat exchangers 30, 31, 33 in heating mode.

The geothermal heat exchanger 55 may operate in a heat recovery mode or in a heat supply mode based on clean or total energy demand to heat the parallel primary heat exchangers 30, 31, 32, 33. When the primary heat exchangers 30, 31, 33 operating in the heating mode require more heating energy from the secondary heat network than the primary heat exchanger(s) 32 operating in cooling mode is supplied to the secondary heat network, the geothermal heat exchanger 55 can operate in heat recovery mode. In an alternative implementation, when the primary heat exchangers 30, 31, 33 are operating in heating mode, less heating energy from the secondary heating network than for the primary heat exchanger(s) 32 operating in cooling mode is supplied to the secondary heating network, then the geothermal heat exchanger 55 can operate in heat supply mode.

The system may include a first pump 8, the first pump being a reversible pump configured to selectively control the geothermal heat exchanger 55 in a heat recovery mode in which the secondary working fluid circulates down in the downcomer 21 and up in the riser 11 in the heat supply mode. , in which the secondary working fluid circulates downwards in the ascending pipe 11 and upwards in the downcomer 21. The first pump 8 can be connected to the supply line 3 or the return line 5 or the ascending pipe 11 or the drain pipe 21.

Alternatively, in the embodiment of FIG. 3, in which the secondary working fluid also circulates in the geothermal heat exchanger 55, the first connection pumps 70, 71, 72, 73 provided in the connection lines 60, 61, 62, 63 or located in connection with the primary heat exchangers 30, 31, 32, 33 may be configured to circulate the secondary working fluid in the geothermal heat exchanger 55 and the first pump 8 may be omitted. This may be advantageous as the system and use of the geothermal heat exchanger 55 becomes automatic based on the demand for clean energy to heat the primary heat exchangers 55.

The primary heat exchanger 30, 31, 32, 33 may be a heat pump or any other known type of heat exchanger.

Fig. 4 shows an alternative implementation of FIG. 3. In this embodiment, the heating and cooling system or arrangement further comprises a secondary heat pump 90 located between the secondary heat network 3, 5, 60, 61, 62, 63 and the geothermal network 11, 21, 92. The secondary heat pump 90 is configured with the possibility of providing a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid, and between the geothermal network 92 and the secondary thermal network 3, 5, 60, 61, 62, 63. Accordingly, the circulation of the secondary working fluid and the geothermal working fluid , as well as the geothermal network (or geothermal heat exchanger 55) and the secondary heating network are separated from each other by the secondary heat pump 90. Thus, the geothermal heat exchanger 55, or geothermal network 92, is, or is located, in a secondary heat exchange connection with the secondary heat network 3 , 5, 60, 61, 62, 63, and a secondary heat pump 90 is provided between the geothermal heat exchanger 55 , or geothermal network 92, and the secondary heat network 3, 5, 60, 61, 62, 63 to provide heat exchange between the secondary heat network 3, 5, 60, 61, 62, 63 and the geothermal heat exchanger 55. Thus, the geothermal network 92 connected to the secondary heat pump 90, and the secondary heat network 3, 5, 60, 61, 62, 63 is also connected to the secondary heat pump 90 to provide a secondary heat exchange connection and to carry out heat transfer between the geothermal network 92 and the secondary heat network 3, 5, 60, 61, 62, 63, and a geothermal working fluid and a secondary working fluid.

Thus, in the heat recovery mode of the geothermal heat exchanger 55, the heating energy is transferred from the geothermal network 92 and the geothermal working fluid to the secondary heat network 3, 5, 60, 61, 62, 63 and the secondary working fluid in the secondary heat pump 90. Similarly , in the heat supply mode of the geothermal heat exchanger 55, the heating energy is transferred from the secondary heat network 3, 5, 60, 61, 62, 63 and the secondary working fluid to the geothermal network 92 and the geothermal working fluid in the secondary heat pump 90.

The secondary heat pump 90 enables the operation of the geothermal network 92 and the secondary heat network 3, 5, 60, 61, 62, 63 at different temperatures. In addition, the secondary heat pump 90 makes it possible to use also a small temperature difference and a small amount of thermal energy together with the geothermal heat exchanger 55.

The secondary heat pump 90 may be replaced by a secondary heat exchanger.

The geothermal heat exchanger 55 of FIG. 4 comprises a first pump 8 configured in a piping arrangement for circulating a working fluid in a piping arrangement in heat supply mode of the geothermal heat exchanger 55 in which the working fluid is circulated towards the lower end 17 of the riser 11 or down in the riser 11 and up drain pipe 21 as indicated by arrows 22 and 12. The first pump 8 may be any kind of known pump capable of circulating a working fluid. The geothermal heat exchanger 55 further comprises a second pump 8' configured to circulate the working fluid down the downcomer 21 and up the riser 11 when the geothermal heat exchanger and the geothermal heating arrangement are in heat recovery mode. The second pump 8' may be any kind of known pump capable of circulating a working fluid. Accordingly, the first pump 8 is configured to operate in the heat supply mode, and the second pump 8' in the heat extraction mode.

The geothermal network is thus equipped with a first pump 8 and a second pump 8'. In addition, the first pump 8 may be a reversible pump and the second pump 8' may be omitted.

Fig. 5 schematically shows one embodiment of a primary heat pump 30 located in the connecting line 60 and between the supply line 3 and the return line 5.

In the heating mode of the heat pump 30 and in the heat recovery mode of the geothermal heat exchanger, in the heat pump 30 the secondary working fluid gives off thermal energy to the working fluid of the heat pump. The heat pump working fluid receives thermal energy from the secondary working fluid in the secondary heat exchange connection 104 of the heat pump 30. The heat pump working fluid can be any suitable fluid, such as a refrigerant. The heat pump 30 may include a pump 35 provided in the heat pump 30 for circulating the heat pump working fluid in the heat pump 30.

The secondary heat exchange connection 104 may be an evaporator, and the liquid heat pump working fluid receives or absorbs heat energy from the secondary working fluid in the evaporator 104, and the heat pump working fluid turns into a gas or becomes a gas. Then, the gaseous heat pump working fluid flows or circulates to the compressor 101 configured to pressurize and increase the temperature of the gaseous heat pump working fluid.

The gaseous heat pump working fluid then releases thermal energy to the primary working fluid of the building or building space at the primary heat exchange connection 103 of the heat pump 30. The primary working fluid receives thermal energy from the heat pump working fluid at the primary connection 103 in a heat transfer capable manner.

The primary heat exchange connection 103 may be a condenser and the gaseous heat pump working fluid may condense back into a liquid as it releases heat energy to the primary working fluid. The liquid heat pump working fluid then flows or circulates to the expansion device 102, in which the pressure of the liquid heat pump working fluid is reduced and the temperature is reduced.

In the heating mode of the heat pump 30, the heat pump 30 receives a cold primary working fluid stream 54 from a building or building space, and it receives thermal energy in the primary heat exchange connection 103 such that the temperature of the primary working fluid increases. The heated primary working fluid stream 52 is then supplied to the building or building space.

The heat pump fluid then flows or circulates back to secondary connection 104 to transfer heat and the cycle repeats.

The secondary working fluid delivers thermal energy to the heat pump 30 or to the heat transferable secondary connection 104 of the heat pump 30. The thermal energy is released and taken up by the heat pump working fluid. Thus, the temperature of the secondary working fluid decreases in the heat pump 30 or as it flows through the heat pump 30 or the second heat exchange connection 104. The secondary working fluid circulates from the supply line 3 to the heat pump 30 and then to the return line 5 , and it gives off thermal energy to the heat pump 30, and the temperature of the secondary working fluid decreases.

When the heat pump 30 is operating in cooling mode, the heat pump 30 receives or absorbs heat energy from the primary working fluid of the building or building space. In the cooling mode, the primary heat exchange connection 103 is configured to transfer thermal energy from the heat pump working fluid to the primary working fluid such that the temperature of the primary working fluid decreases and the temperature of the heat pump working fluid increases.

The liquid heat pump working fluid receives or absorbs thermal energy from the primary working fluid of the building space or building in the primary heat exchange connection 103 of the heat pump 30. Thus, the warm or hot flow of the primary working fluid gives off thermal energy to the liquid working fluid of the heat pump in primary connection 103 with heat transfer capability. The primary working fluid is cooled or the temperature of the primary working fluid is reduced. The cold primary working fluid stream flows back from the heat pump 30 to the building or building space.

The primary heat exchange connection 103 may now be an evaporator. The liquid heat pump working fluid receives or absorbs thermal energy from the primary working fluid in the evaporator and vaporizes into a gas to form a gaseous heat pump working fluid.

The gaseous working fluid of the heat pump flows or circulates in the compressor 101. The compressor 101 is configured to pressurize and increase the temperature of the gaseous working fluid. From the compressor 101, the gaseous heat pump working fluid flows or circulates to the second heat exchange connection 104. In the secondary heat exchange connection 104, the high temperature heat pump working fluid gives off energy to heat the secondary working fluid in the secondary heat exchange connection 104. Thus, the temperature of the working fluid of the heat pump is reduced and the working fluid of the heat pump returns to a liquid state.

The second heat exchange connection 104 may now be a condenser. The gaseous heat pump working fluid gives off thermal energy to the secondary working fluid in the condenser and liquefies to form a liquid heat pump working fluid.

It should be noted that in the context of the present invention, the heat pump 30 may only include primary and secondary connections 103, 104 with heat transfer capability. In addition, the primary and secondary heat transfer connections 103, 104 may comprise any known type of heat exchanger. Accordingly, the present invention is not limited to any particular type of heat pump 30. Heat pump 30 may be a liquid-to-liquid heat pump in which both the geothermal working fluid and the primary working fluid are liquids, or a liquid-to-gas (or liquid-to-air) heat pump in which the geothermal working fluid is a liquid and the primary working fluid is a gas such as air.

In addition, in some embodiments, the heat pump 30 may be replaced, or it may be a heat exchanger in which heat energy is transferred directly between the secondary working fluid and the primary working fluid of the building or building space. The flow of the secondary working fluid in the connecting lines 60, 61, 62, 63 is based on the modes of heating and cooling. In an alternative implementation, the heat pump 30 may be replaced, or it may be any known form of heat exchange connection provided between the primary working fluid and the secondary working fluid.

Additionally, it should be noted that the heat pump working fluid can also be omitted, and the primary working fluid or the secondary working fluid can be circulated in the heat pump 30 by the compressor 101, the expansion device 102 and the primary and secondary heat exchange connections 103, 104.

Fig. 6 schematically shows one embodiment of a secondary heat pump 90 installed between a geothermal network 92 and a secondary heat network 3, 5.

In the heat recovery mode of the geothermal heat exchanger 55, the geothermal working fluid flowing in the geothermal network 92 gives off heat energy to the secondary heat pump 90 of the heat pump working fluid. The heat pump working fluid receives thermal energy from the geothermal working fluid in the secondary heat exchange connection 204 of the secondary heat pump 90. The heat pump working fluid can be any suitable fluid, such as a refrigerant. The secondary heat pump 90 may include a pump 205 provided in the secondary heat pump 90 for circulating the heat pump working fluid in the secondary heat pump 90. The geothermal working fluid circulates in the geothermal network up the ascending pipe 11 with the secondary heat pump 90.

The secondary heat exchange connection 204 may be an evaporator, and the liquid heat pump working fluid receives or absorbs heat energy from the geothermal working fluid in the evaporator 204, and the heat pump working fluid turns into a gas or becomes a gas. Then, the gaseous heat pump working fluid flows or circulates in the compressor 201 configured to pressurize and increase the temperature of the gaseous heat pump working fluid.

The gaseous heat pump working fluid then gives off thermal energy to the secondary working fluid flowing in the secondary heating network 3, 5 in the primary heat exchange connection 203 of the secondary heat pump 90. The secondary working fluid receives thermal energy from the heat pump working fluid in the primary connection 203 capable of transferring heat. The secondary working fluid flows to the secondary heat pump 90 from the return line 5 and back to the supply line 3 via the primary heat exchange connection 203 at an elevated temperature.

The primary heat exchange connection 203 may be a condenser and the gaseous heat pump working fluid may condense back into a liquid as it releases heat energy to the primary working fluid. The liquid heat pump working fluid then flows or circulates to the expansion device 202, in which the pressure of the liquid heat pump working fluid is reduced and the temperature is reduced.

In the heat supply mode of the geothermal heat exchanger 55, the geothermal working fluid flowing in the geothermal network 92 receives heat energy in the secondary heat pump 90 from the heat pump working fluid. The heat pump working fluid gives off thermal energy to the geothermal working fluid in the secondary heat exchange connection 204 of the secondary heat pump 90. The heated geothermal working fluid circulates in the geothermal network down the ascending pipe 11 from the secondary heat pump 90.

In the secondary heat pump 90, the secondary heat pump 90 receives the heated flow of the secondary working fluid from the secondary heat network 3, 5, or supply line 3, and it releases heat energy to the primary heat exchange connection 203 such that the temperature of the secondary working fluid decreases. The secondary working fluid then flows to the return line 5.

The heated working fluid then flows or circulates back to secondary connection 204 to transfer heat and the cycle repeats.

The secondary working fluid delivers thermal energy to the secondary heat pump 90 or to the secondary heat transfer connection 204 of the secondary heat pump 90. The thermal energy is released and taken up by the heat pump working fluid. Thus, the temperature of the secondary working fluid decreases in the secondary heat pump 90 or as it flows through the secondary heat pump 90 or the second heat exchange connection 204. The secondary working fluid circulates from the supply line 3 to the secondary heat pump 50 and on to return line 5, and it gives off thermal energy to the secondary heat pump 90, and the temperature of the secondary working fluid decreases.

When the geothermal heat exchanger 55 is in heat supply mode, the secondary heat pump 90 receives or absorbs heat energy from the secondary working fluid in the secondary heat network 3, 5. The primary heat exchange connection 203 is configured to transfer heat energy from the secondary working fluid to the working fluid. environment of the heat pump such that the temperature of the secondary working fluid decreases and the temperature of the working fluid of the heat pump increases.

The liquid heat pump working fluid receives or absorbs thermal energy from the secondary working fluid of the secondary heat network in the primary heat exchange connection 203 of the secondary heat pump 90. Thus, the warm or hot flow of the secondary working fluid gives off thermal energy to the liquid heat pump working fluid in primary connection 203 with heat transfer capability. The secondary working fluid cools or the temperature of the secondary working fluid decreases. The cold secondary working fluid flows back from the secondary heat pump 30 to the return line 5.

The primary heat exchange connection 203 may now be an evaporator. The liquid heat pump working fluid receives or absorbs thermal energy from the primary working fluid in the evaporator and vaporizes into a gas to form a gaseous heat pump working fluid.

The gaseous working fluid of the heat pump flows or circulates in the compressor 201. The compressor 201 is configured to pressurize and increase the temperature of the gaseous working fluid. From the compressor 201, the gaseous heat pump working fluid flows or circulates to the secondary heat exchange connection 204. In the secondary heat exchange connection 204, the high temperature heat pump working fluid gives off energy to heat the geothermal working fluid in the secondary heat exchange connection 204. Thus, the temperature of the working fluid of the heat pump is reduced and the working fluid of the heat pump returns to a liquid state.

The secondary heat exchange connection 204 may now be a condenser. The gaseous heat pump working fluid gives off heat energy to the geothermal working fluid in the condenser and liquefies to form a liquid heat pump working fluid.

It should be noted that in the context of the present invention, the secondary heat pump 90 may contain only primary and secondary connections 203, 204 with the ability to transfer heat. In addition, the primary and secondary heat transfer connections 203, 204 may comprise any known type of heat exchanger. Accordingly, the present invention is not limited to any particular form of secondary heat pump 90. The secondary heat pump 90 may be a liquid-to-liquid heat pump in which both the geothermal working fluid and the primary working fluid are liquids, or a liquid-to-gas heat pump ( or liquid-air) in which the geothermal working fluid is a liquid and the primary working fluid is a gas such as air.

As shown in FIG. 3 and 4, the system may further comprise a solar electricity device 110 located in connection with the building or building space and connected to the primary heat pump 33 for supplying electricity to the primary heat pump 33 and for controlling the primary heat pump 33. Alternatively, it can also be provided that the solar electricity device 110 may also be connected to the secondary heat pump 90 in the embodiment of FIG. four.

As shown in FIG. 3 and 4, the present invention provides an arrangement for heating and cooling two or more buildings or rooms of buildings.

The arrangement comprises two or more rooms 80, 81, 82, 83 of the building or buildings 50, as shown, for example, in FIG. 7 and 9. The arrangement further comprises a secondary heat network for circulating the secondary working fluid. The secondary heat network comprises a supply line 3 for circulating a high temperature secondary working fluid and a return line 5 for circulating a low temperature secondary working fluid. The arrangement further comprises two or more building connections 100, shown in dotted lines in FIG. 3 and 4. Two or more building connections 100 are arranged parallel to each other and between the supply line 3 and the return line 5 of the secondary heat network. The two or more building connections 100 comprise primary heat exchangers 30, 31, 32, 33 located in connection with two or more building rooms 80, 81, 82, 83 or buildings 50. Thus, two or more buildings 50 or rooms 80, 81 , 82, 83 buildings are connected or located in heat exchange connection with each other through connections 100 of the building and the supply line 3 and the return line 5.

Building connections 100 may include connection lines 60, 616, 62, 63 and connection pumps 70, 71, 72, 73, 74 as described above.

The building connection 100 can be further equipped with control devices 40, 41, 42, 43 connected via control lines 44, 45, 46, 47 to primary heat exchangers 30, 31, 32, 33 and/or to connection pumps 70, 71, 72 , 73, respectively. The control device 40, 41, 42, 43 may be configured to control the primary heat exchangers 30, 31, 32, 33 selectively in heating and cooling modes.

The arrangement further comprises a hole in the ground 2 provided in the ground and extending from the surface 1 of the ground, and a geothermal heat exchanger 55 located in the hole 2 in the ground and located in connection with the secondary heat network as described above.

Building connection 100 or primary heat exchangers 30, 31, 32, 33 of two or more building connections 100 may be located in connection with different building rooms 80, 81, 82, 83 of the same building 50, as shown in FIG. 7. Accordingly, the supply line 3 and the return line 5 continue in the building 50, and the connection 100 of the building or the primary heat exchangers 30, 31, 32, 33 are located in parallel between the supply line 3 and the return line 5 and in connection with the various rooms 80, 81, 82, 83 buildings. Thus, the building spaces 80, 81, 82, 83 can be heated and/or cooled independently of each other and at the same time provide a heat exchange connection between the building spaces 80, 81, 82, 83.

In FIG. 7, the system and arrangement includes a geothermal heat exchanger 5 connected to a supply line 3 and a return line 5. In this embodiment, the system includes a first pump 8 configured to operate the geothermal heat exchanger 55 in a heat recovery mode in which a secondary working fluid circulates downward into downpipe 21 and up in the riser 11, and a second pump 9 configured to control the geothermal heat exchanger 55 in a heat supply mode in which the secondary working fluid is circulated down in the riser 11 and up in the downcomer 21.

The building 50 or rooms 80, 81, 82, 83 of the building may contain a heating network 52, 54 of buildings for heating rooms 80, 81, 82, 83 of the building. The heat network 52, 54 of the buildings may be a ventilation system, a liquid circulating heat supply system, or the like configured to circulate the primary working fluid of the rooms 80, 81, 82, 83 of the building. Primary heat exchangers 30, 31, 32, 33 of two or more building connections 100 can be connected to heat networks 52, 54 of building rooms of different rooms 80, 81, 82, 83 of the building.

In FIG. 8, the system and layout comprises a geothermal heat exchanger 55 with a geothermal network 92. A secondary heat pump 90 is located between the geothermal network 92 and a secondary heat network 3, 5 containing a supply line 3 and a return line 5. In this embodiment, the system includes a first pump 9, configured to circulate the secondary working fluid in the heat supply mode of the geothermal heat exchanger 55, in which the secondary working fluid flows from the supply line 3 to the secondary heat pump 90. The system also includes a first pump 9' configured to circulate the secondary working fluid in the heat recovery mode of the geothermal heat exchanger 55, in which the secondary working fluid flows from the return line 5 to the secondary heat pump 90.

The embodiment of FIG. 8 is a modification of the embodiment of FIG. 7 with secondary heat pump 90 or secondary heat exchanger 90.

Fig. 9 shows an alternative implementation in which a building connection 100 or primary heat exchangers 30, 31, 32, 33 of two or more building connections 100 can be located in connection with different buildings 50. Accordingly, the supply line 3 and the return line 5 continue between the various buildings. , and building connection 100 or primary heat exchangers 30, 31, 32, 33 are arranged in parallel between supply line 3 and return line 5 and in connection with various buildings. Thus, the buildings 50 can be heated and/or cooled independently of each other and at the same time provide a heat exchange connection between the buildings 50.

In FIG. 9, the system and arrangement includes a geothermal heat exchanger 55 connected to a supply line 3 and a return line 5 via a secondary heat pump 90. The geothermal heat exchanger 55 includes an upcomer 11 and a downcomer 21 configured to provide a geothermal network 92 to circulate the geothermal working fluid. environment along the riser pipe 11 and the downcomer pipe 21. The heating and cooling system or arrangement further comprises a secondary heat pump 90 located between the secondary heat network 3, 5 and the geothermal network 92. The secondary heat pump 90 is configured to provide a secondary heat exchange connection between the secondary working fluid and geothermal working fluid, and between the geothermal network 92 and the secondary heating network 3, 5. Accordingly, the circulation of the secondary working fluid and the geothermal working fluid, as well as the geothermal network (or geothermal heat exchanger 55) and the secondary thermal the network 3, 5 are separated from each other by the secondary heat pump 90. Thus, the geothermal heat exchanger 55 is located in heat exchange connection with the secondary heat network 3, 5, 60, 61, 62, 63, and the secondary heat pump 90 is provided between the geothermal heat exchanger 55 and secondary heat network 3, 5, 60, 61, 62, 63 to ensure heat exchange between the secondary heat network 3, 5, 60, 61, 62, 63 and geothermal heat exchanger 55.

The buildings 50 may comprise a building heat network 52, 54 to heat the buildings 50. The building heat network 52, 54 may be a ventilation system, a fluid circulation heat supply system, or the like, configured to circulate the building's primary working fluid 50. Primary heat exchangers 30, 31, 32, 33 of two or more building connections 100 can be connected to building heating networks 52, 54 of different buildings 50.

Thus, in FIG. 9, two or more building connections 100 or primary heat exchangers 30, 31, 32, 33 of two or more building connections 100 are located in connection with different buildings 50.

Fig. 10 shows an embodiment in which the secondary heat network 3, 3', 5, 5' contains two secondary heat subnets 3, 5 and 3', 5' located in heat exchange connection with each other. In FIG. 10 shows the first secondary thermal subnet 3, 5 and the second secondary thermal subnet 3', 5'. However, there may be two or more secondary thermal subnets. In the embodiment of FIG. 10, the secondary heat subnets 3.5 and 3', 5' are configured to be in fluid communication with each other so that the same secondary working fluid can flow in both secondary heat subnets 3.5 and 3', 5'. Accordingly, the supply line 3 of the first secondary heat subnet is connected and in fluid communication with the supply line 3' of the second secondary heat subnet. Similarly, the return line 5 of the first secondary heat subnet is connected and in fluid communication with the return line 5' of the second secondary heat subnet.

In FIG. 10, the subnet heat exchanger 95 divides the secondary heat network into a first secondary heat subnet 3, 5 and a second secondary heat subnet 3', 5'. The subnet heat exchanger 95 may be a subnet heat pump 95 located between the supply line 3, '3' and the return line 5, 5', allowing heat exchange between the supply line 3, 3' and the return line 5, 5'. The subnet heat pump 95 comprises a subnet heat exchanger fluid circuit 98, 99 and a first subnet heat exchange connection 96 and a second subnet heat exchange connection 97 so that heat energy can be exchanged between the supply line 3, 3' and the return line 5, 5'. Thus, the subnet heat exchanger 95 separates the secondary heat network into secondary heat subnets and enables the temperature of the secondary working fluid to be controlled. Accordingly, the sub-network heat exchanger 95 can raise the temperature of the secondary working fluid flowing from the first secondary heat sub-network supply line 3 to the second secondary heat sub-network supply line 3' and lower the temperature of the secondary working fluid flowing from the second secondary heat sub-network return line 5' to the return line 5 of the first secondary heat subnet.

Accordingly, this allows the high temperature secondary working fluid to circulate in the flow line 3, 3' of the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63 and the low temperature secondary working fluid in the return line 5, 5 ' secondary heat network 3, 3', 5, 5', 60, 61, 62, 63. In addition, increase the temperature of the high-temperature secondary working fluid circulating in the flow line 3, 3' of the secondary heat network 3, 3', 5 , 5', 60, 61, 62, 63, and reduce the temperature of the low-temperature secondary working fluid circulating in the return line 5, 5' of the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63, by using a heat pump located in the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63 between the supply line 3, 3' and the return line 5, 5'.

Fig. 11 shows a modification of the embodiment of FIG. 10. In FIG. 11, the subnet heat exchanger 95 separates the secondary heat network into a first secondary heat subnet 3, 5 and a second secondary heat subnet 3', 5'. The subnet heat exchanger 95 may be a subnet heat pump 95 located between the supply line 3, '3' and the return line 5, 5', allowing heat exchange between the supply line 3, 3' and the return line 5, 5'. The subnet heat pump 95 comprises a subnet heat exchanger fluid circuit 98, 99 and a first subnet heat exchange connection 96 and a second subnet heat exchange connection 97 so that energy for heating can be exchanged between the supply line 3, 3' and the return line 5, 5'. Thus, the subnet heat exchanger 95 separates the secondary heat network into secondary heat subnets and enables the temperature of the secondary working fluid to be controlled. Accordingly, the sub-network heat exchanger 95 can raise the temperature of the secondary working fluid flowing from the first secondary heat sub-network supply line 3 to the second secondary heat sub-network supply line 3' and lower the temperature of the secondary working fluid flowing from the second secondary heat sub-network return line 5' to the return line 5 of the first secondary heat subnet.

Accordingly, this allows the high temperature secondary working fluid to circulate in the flow line 3, 3' of the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63 and the low temperature secondary working fluid in the return line 5, 5 ' secondary heat network 3, 3', 5, 5', 60, 61, 62, 63. In addition, increase the temperature of the high-temperature secondary working fluid circulating in the flow line 3, 3' of the secondary heat network 3, 3', 5 , 5', 60, 61, 62, 63, and reduce the temperature of the low-temperature secondary working fluid circulating in the return line 5, 5' of the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63, by using a heat pump installed in the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63 between the supply line 3, 3' and the return line 5, 5'.

The embodiment of FIG. 11 further comprises a secondary heat pump or heat exchanger 90 located between the first secondary heat subnetwork 3, 5 and the geothermal network 92. The secondary heat pump 90 is configured to provide a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid, and between the geothermal network 92 and the first secondary heat network 3, 5. Accordingly, the circulation of the secondary working fluid and the geothermal working fluid, as well as the geothermal network (or geothermal heat exchanger 55) and the first secondary heat network 3, 5 are separated from each other by the secondary heat pump 90. Thus, the geothermal heat exchanger 55 is located in heat exchange connection with the secondary heat network 3, 3', 5, 5', 60, 61, 62, 63, and the secondary heat pump 90 is provided between the geothermal heat exchanger 55 and the secondary heat network 3, 3' , 5, 5', 60, 61, 62, 63 or the first secondary thermal subnet 3, 5 to provide heat exchange between the secondary heat network 3, 3', 5, 5', 60, 61, 62, 63 or the first secondary heat subnetwork 3, 5 and the geothermal heat exchanger 55.

Fig. 12 shows an alternative implementation in which a subnet heat exchanger or heat pump 95 is provided between the first secondary heat subnet 3, 5 and the second secondary heat subnet 3', 5' and is configured to provide subnet heat exchange between the first secondary heat subnet 3, 5 and the second secondary thermal subnet 3', 5'. Thus, in this embodiment, the subnet heat exchanger or subnet heat pump 95 is located between two or more secondary heat subnets 3, 5, 60; 3', 5', 61, 62, 63 to ensure heat exchange between two or more secondary heat subnets 3, 5, 60; 3', 5', 61, 62, 63, and two or more secondary heat subnets are separated from each other by a subnet heat exchanger or subnet heat pump 95. Accordingly, the first secondary thermal sub-network circulates the first secondary working fluid, and the second secondary thermal sub-network circulates the second secondary working fluid. The first and second secondary thermal subnets are not in fluid communication with each other, but the separated secondary working fluid circulates in the first and second secondary thermal subnets. However, the system and arrangement of FIG. 12 may operate in a similar manner to the system and arrangement of FIG. 10 for raising and lowering the temperature.

Fig. 13 shows a modification of the embodiment of FIG. 12. FIG. 13 shows an alternative implementation in which a subnet heat exchanger or heat pump 95 is provided between the first secondary heat subnet 3, 5 and the second secondary heat subnet 3', 5' and is configured to provide subnet heat exchange between the first secondary heat subnet 3, 5 and the second secondary thermal subnet 3', 5'. Thus, in this embodiment, the subnet heat exchanger or subnet heat pump 95 is located between two or more secondary heat subnets 3, 5, 60; 3', 5', 61, 62, 63 to ensure heat exchange between two or more secondary heat subnets 3, 5, 60; 3', 5', 61, 62, 63, and two or more secondary heat subnets are separated from each other by a subnet heat exchanger or subnet heat pump 95. Accordingly, the first secondary heat network circulates the first secondary working fluid, and the second secondary heat subnet circulates the second secondary working fluid. The first and second secondary thermal subnets are not in fluid communication with each other, but the separated secondary working fluid circulates in the first and second secondary thermal subnets. However, the system and arrangement of FIG. 13 may operate in a similar manner to the system and arrangement of FIG. 11 for raising and lowering the temperature.

The embodiment of FIG. 13 further comprises a secondary heat pump or heat exchanger 90 located between the first secondary heat subnetwork 3, 5 and the geothermal network 92. The secondary heat pump 90 is configured to provide a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid, and between the geothermal network 92 and the first secondary heat network 3, 5. Accordingly, the circulation of the secondary working fluid and the geothermal working fluid, as well as the geothermal network (or geothermal heat exchanger 55) and the first secondary heat network 3, 5 are separated from each other by the secondary heat pump 90. Thus, the geothermal heat exchanger 55 is located in heat exchange connection with the secondary heat network 3, 3', 5, 5', 60, 61, 62, 63, and the secondary heat pump 90 is provided between the geothermal heat exchanger 55 and the secondary heat network 3, 3' , 5, 5', 60, 61, 62, 63 or the first secondary heat network 3, 5 to ensure heat exchange between the secondary heat network 3, 3', 5, 5', 60, 61, 62, 63 or the first secondary heat network 3, 5 and the geothermal heat exchanger 55.

According to FIG. 10, 11, 12 and 13, two or more parallel building connections 100 can be connected to each other via a supply line 3, 3' and a return line 5, 5' of two or more secondary heating subnets 3, 5, 60; 3', 5', 61, 62, 63 and are located in connection with each other with the possibility of heat transfer through the supply line 3, 3' and the return line 5, 5'.

In addition, at least two of the two or more secondary heat subnets comprise one or more building connections 100 or one or more primary heat exchangers 30, 31, 32, 33. Additionally, building connections 100 are connected to each other via two or more secondary heat exchangers. sub-networks and one or more heat pumps 95 sub-networks and are located in connection with each other with the possibility of transferring heat through two or more secondary heat sub-networks and one or more heat pumps 95 sub-networks.

In accordance with the above, when the secondary heat network contains two or more secondary heat subnets, the building connections 100 and the primary heat exchangers 30, 31, 32, 33 of the different secondary heat subnets are located in heat exchange connection with each other via flow lines 3, 3' and return lines 5, 5' of various secondary heat subnets and through one or more subnet heat pumps or heat exchangers 95.

Fig. 14 and 14 show another embodiment of the geothermal heat exchanger 55.

Fig. 14 shows another embodiment in which the ascending pipe 11 is located inside the downcomer 21. In this embodiment, the ascending pipe 11 and the downcomer 21 are inserted into one another, or they can be positioned coaxially in each other such that the ascending pipe 11 is located inside the drain pipe 21, as in FIG. 1. The riser 11 includes a first thermal insulation 25. The first thermal insulation 25 reduces or minimizes heat transfer between the riser 11 and downcomer 21 and between the working fluid flow 22 and the working fluid flow 12.

As shown in FIG. 14, the thermal insulation 25 extends from the lower end 17 of the ascending pipe 11 along the ascending pipe 11.

In the embodiment of FIG. 10, the drain pipe 21 is a pipe having a closed lower end 13 and extending inside a hole 2 in the ground to a lower end 4 of the hole in the ground near it. Accordingly, the ascending pipe 11 is completely located inside the downcomer 21 in the hole 2 in the ground, and the geothermal working fluid does not come into direct contact with the ground.

It should be noted that the hole 2 in the ground can form a drain pipe 21 and a separate drain pipe can be omitted as in FIG. 1 and 2. In an alternative embodiment, a separate downspout 21 extends a predetermined distance from the ground surface 1 with an open lower end, and the hole 2 in the ground forms at least part of the downspout.

In the embodiment of FIG. 15, the ascending pipe 10 and the downcomer 20 are spaced apart and connected to each other by a pipe fitting 18, or bend, at the lower ends of the ascending pipe 10 and the downcomer 20. In other words, the ascending pipe 10 and the downcomer 20 form a U-shaped tube structure. However, it should be noted that the present invention is not limited to any particular tubular structure of the riser 10 and downcomer 20 or any number of risers 10 and downcomer 20.

In the embodiment of FIG. 15, the first thermal insulation 25 extends along the ascending pipe 10 at a distance from the lower end of the ascending pipe 10 or the connecting part 18 of the pipe or bend.

The first thermal insulation may be provided on the inner surface and/or outer surface of the ascending pipe 10, 11.

The present invention provides a method for heating and cooling multiple rooms 80, 81, 82, 83 of a building or buildings 50 by using the system and arrangement as described above in conjunction with Figures 1-15.

The method includes circulation of the secondary working fluid in the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63 and performing two or more first stages of heat exchange in parallel in the secondary heating network 3, 3', 5, 5' , 60, 61, 62, 63 between the secondary working fluid and the primary working fluid of rooms 80, 81, 82, 83 of the building or buildings 50 located or located in connection with two or more other rooms 80, 81, 82, 83 of the building or buildings 5. The method further includes performing a second stage of heat exchange between the secondary working fluid circulating in the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63, and the ground with a geothermal heat exchanger 55 located in the hole 2 in the ground and located in connection with the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63. Accordingly, the method may include heat exchange between the room 80, 81, 82, 83 of the building or buildings 50 and between geothermal heat exchanger 55 and room 80, 81, 82, 83 building buildings or buildings 50.

In the method, at least one of the two or more parallel first heat exchange steps may be carried out in a heating mode, in which energy for heating is transferred from the secondary working fluid to the primary working fluid of the room 80, 81, 82, 83 of the building or building 50, and at least one of the two or more first primary heat exchange steps may be performed in a cooling mode in which energy for heating is transferred from the primary working fluid of the building room 80, 81, 82, 83 or building 50 to the secondary working fluid.

Thus, the method may include performing two or more parallel first heat exchange steps with two or more parallel primary heat exchangers 30, 31, 32, 33 or building connections 100 located in connection with two or more different building rooms 80, 81, 82, 83 or buildings 5. Then, controlling at least one of the two or more primary heat exchangers 30, 31, 32, 33 in a heating mode in which energy for heating is transferred from the secondary working fluid to the primary working fluid of the rooms 80, 81, 82 , 83 of the building or building 50, and controlling at least one of two or more primary heat exchangers 30, 31, 32, 33 in a cooling mode in which energy for heating is transferred from the primary working fluid of the building room 80, 81, 82, 83 or building 50 to the secondary working fluid. The method may thus further include performing district heat exchange between at least one of the two or more primary heat exchangers 30, 31, 32, 33 operating in heating mode and at least one of the two or more primary heat exchangers 30, 31, 32, 33 operating in cooling mode. through the secondary heating network 3, 3’, 5, 5’, 60, 61, 62, 63.

Accordingly, in the method, the geothermal heat exchanger 55 is in a heat recovery mode in which the second heat exchange step includes transferring energy for heating from the ground to a secondary working fluid or to a geothermal working fluid in the geothermal heat exchanger 55, or in a heat supply mode in which the second step heat exchange involves transferring energy for heating from the secondary working fluid or from the geothermal working fluid into the ground in the geothermal heat exchanger 55 based on the demand for total or net thermal energy of the building parallel connections 100 or primary heat exchangers 30, 31, 32, 33.

The second heat exchange step may include circulating the secondary working fluid in the geothermal heat exchanger 55 and performing heat exchange between the secondary working fluid and the ground in the hole 2 in the ground.

In an alternative implementation, the second heat exchange step may include circulating the geothermal working fluid in the geothermal heat exchanger 55, performing heat exchange between the secondary working fluid circulating in the secondary heat network 3, 3', 5, 5', 60, 61, 62, 63, and the geothermal working fluid circulating in the geothermal heat exchanger 55, and performing heat exchange between the geothermal working fluid and the ground in the hole 2 in the ground.

In an alternative implementation, the method may further include operating the geothermal heat exchanger 55 in a heat recovery mode, in which the second stage of heat exchange includes transferring energy for heating from the geothermal working fluid in the geothermal heat exchanger 55 to the secondary working fluid in the secondary heat pump 90, or in the mode supplying heat, wherein the second heat exchange step includes transferring energy for heating from the secondary working fluid to the geothermal working fluid in the secondary heat pump 90 based on the demand for total or net thermal energy of the building parallel connections 100 or primary heat exchangers 30, 31, 32, 33.

The second stage of heat exchange is performed between the secondary working fluid circulating in the secondary heating network 3, 3', 5, 5', 60, 61, 62, 63 and the ground with the geothermal heat exchanger 55 in the hole 2 in the ground. The hole in the ground has a depth of at least 300 m, or at least 500 m, or from 300 m to 3000 m, or from 500 m to 2500 m. Alternatively or additionally, the hole 2 in the ground extends into the ground to a depth at which the temperature is at least 15°C, or approximately 20°C, or at least 20°C.

The invention has been described above with reference to the examples shown in the drawings. However, the invention is in no way limited to the above examples, but may vary within the scope of the claims.

Claims (58)

1. A heating and cooling system for conditioning several rooms (50, 80, 81, 82, 83) of a building, comprising: - a secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) for circulation of the secondary working fluid, and the secondary heating network (3, 3', 5, 5') contains a supply line (3 , 3') for circulating a high temperature secondary working fluid and a return line (5, 5') for circulating a low temperature secondary working fluid; - two or more connecting lines (60, 61, 62, 63) provided in the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63), each connecting line (60, 61, 62, 63) extends between the supply line (3, 3') and the return line (5, 5') and is configured to connect the supply line (3, 3') and the return line (5, 5') to each other; - two or more primary heat exchangers (30, 31, 32, 33) located in two or more connecting lines (60, 61, 62, 63) and configured to provide a primary heat exchange connection between the secondary heat network (3, 3', 5, 5', 60, 61, 62, 63) and the premises (50, 80, 81, 82, 83) of the building; and - geothermal heat exchanger (55) located in connection with the secondary heating network (3, 3’, 5, 5’), characterized in that the geothermal heat exchanger (55) contains a geothermal network (3, 3', 5, 5') having an ascending pipe (10, 11) and a drain pipe (20, 21), and the ascending pipe (10, 11) is located inside the drain pipe (20, 21), and the ascending pipe (10, 11) of the geothermal heat exchanger (55) is equipped with a first thermal insulation (25) surrounding the ascending pipe (10, 11) and extending along at least part of the length of the ascending pipe (10, 11) from the surface (1) of the earth, and the heating and cooling system contains: - the first pump (8) configured to control the geothermal heat exchanger (55) in the heat recovery mode, in which the secondary working fluid circulates downward in the downcomer (20, 21) and upward in the ascending pipe (10, 11), and the second a pump (9) configured to control the geothermal heat exchanger (55) in a heat supply mode in which the secondary working fluid circulates down in the riser (10, 11) and up in the downcomer (20, 21); or - a first pump (8), the first pump being a reversible pump configured to selectively control the geothermal heat exchanger (55) in a heat recovery mode in which the secondary working fluid circulates downward in the downcomer (20, 21) and upward in the ascending pipe (10, 11), in a heat supply mode in which the secondary working fluid circulates downward in the ascending pipe (10, 11) and upward in the downcomer pipe (20, 21). 2. The heating and cooling system according to claim 1, characterized in that - the supply line (3) of the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) is connected to the ascending pipe (10, 11) and is made with the possibility of fluid communication with the ascending pipe (10 , 11) to ensure the flow of the secondary working fluid between the ascending pipe (10, 11) and the supply line (3); and - the return line (5) of the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) is connected to the drain pipe (20, 21) and is made with the possibility of fluid communication with the drain pipe (20 , 21) to ensure the flow of the secondary working fluid between the drain pipe (20, 21) and the return line (5); or - geothermal heat exchanger (55) contains an ascending pipe (10, 11) and a drain pipe (20, 21) configured to provide a geothermal network (10, 11, 20, 21) for circulating a geothermal working fluid along an ascending pipe (10, 11) and drain pipe (20, 21); and - the heating and cooling system further comprises a secondary heat exchanger (90) located between the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) and the geothermal network (10, 11, 20, 21), moreover, the secondary heat exchanger (90) is configured to provide a secondary heat exchange connection between the secondary working fluid and the geothermal working fluid. 3. The heating and cooling system according to claim 1 or 2, characterized in that - secondary heat network (3, 3', 5, 5', 60, 61, 62, 63) contains the first secondary heat subnet (3, 5), the second secondary heat subnet (3', 5') and the heat exchanger (95) subnet provided between the first secondary heat subnet (3, 5) and the second secondary heat subnet (3', 5') and configured to provide subnet heat exchange between the first secondary heat subnet (3, 5) and the second secondary heat subnet (3' , 5'); or - secondary heat network (3, 3', 5, 5', 60, 61, 62, 63) contains the first secondary heat subnet (3, 5), the second secondary heat subnet (3', 5') and the heat pump (95 ) subnet provided between the first secondary heat subnet (3, 5) and the second secondary heat subnet (3', 5') and configured to provide subnet heat exchange between the first secondary heat subnet (3, 5) and the second secondary heat subnet (3 ', 5'). 4. The heating and cooling system according to any one of paragraphs. 1-3, characterized in that - two or more connecting lines (60, 61, 62, 63) are equipped with a connecting pump (70, 71, 72, 73) configured to circulate the secondary working fluid between the supply line (3, 3') and the return line (5 , 5'); or - at least one of two or more connecting lines (60, 61, 62, 63) is equipped with a first connecting pump (70, 71, 72, 73) configured to circulate the secondary working fluid in the direction away from the supply line (3, 3') to the return line (5, 5'), and a second connecting pump (74) configured to circulate the secondary working fluid in the direction from the return line (5, 5') to the supply line (3, 3'); or - at least one of the two or more connecting lines (60, 61, 62, 63) is equipped with a first connection pump (70, 71, 72, 73), wherein the first connection pump (70, 71, 72, 73, 74) represents is a reversible pump configured to selectively circulate the secondary working fluid in the direction from the supply line (3, 3') to the return line (5, 5') and in the direction from the return line (5, 5') to the supply line (3 , 3'). 5. A device for heating and cooling several rooms (80, 81, 82, 83) of a building or buildings (50), containing: - two or more rooms (80, 81, 82, 83) of a building or buildings (50); - a secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) for circulation of the secondary working fluid, and the secondary heating network (3, 3', 5, 5') contains a supply line (3 , 3') for circulating a high temperature secondary working fluid and a return line (5, 5') for circulating a low temperature secondary working fluid; - two or more building connections (100) located parallel to each other and between the supply line (3) and the return line (5) of the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63), moreover, two or more connections (100) of the building contain a primary heat exchanger (30, 31, 32, 33) located in connection with two or more rooms (80, 81, 82, 83) of the building or buildings (50); and - a hole (2) in the ground, provided in the ground and extending from the surface (1) of the ground, characterized in that the depth of the hole (2) in the ground is at least 300 m, and the device contains a geothermal heat exchanger (55) located in the hole (2) in the ground, having a depth of at least 300 m, and located in connection with the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63), and the geothermal heat exchanger (55) contains a geothermal a network (3, 3', 5, 5') having an ascending pipe (10, 11) and a drain pipe (20, 21), the ascending pipe (10, 11) being located inside the drain pipe (20, 21), and the ascending the pipe (10, 11) of the geothermal heat exchanger (55) is equipped with the first thermal insulation (25) surrounding the ascending pipe (10, 11) and passing along at least part of the length of the ascending pipe (10, 11) from the ground surface (1). 6. Device according to claim 5, characterized in that - primary heat exchangers (30, 31, 32, 33) of two or more connections (100) of the building are located in connection with different rooms (80, 81, 82, 83) of the building (50); or - primary heat exchangers (30, 31, 32, 33) of two or more connections (100) of the building are connected to heat networks (52, 54) of the premises of the building of various premises (80, 81, 82, 83) of the building, and the heat networks (52, 54) rooms of the building are made with the possibility of circulation of the primary working fluid of the room (80, 81, 82, 83) of the building; or two or more primary heat exchangers (30, 31, 32, 33) of two or more building connections (100) are located in connection with different buildings (50); or - two or more primary heat exchangers (30, 31, 32, 33) of two or more connections (100) of the building are connected to the heat networks (52, 54) of buildings of different buildings (50), and the heat networks (52, 54) of the premises of the building are made with the possibility of circulation of the primary working fluid of the building (50). 7. Device according to claim 5 or 6, characterized in that - the geothermal heat exchanger (55) is connected to the secondary heat network (3, 3', 5, 5', 60, 61, 62, 63), and the geothermal heat exchanger (55) and the secondary heat network (3, 3', 5, 5 ', 60, 61, 62, 63) are configured to be in fluid communication with each other to circulate the secondary working fluid in the geothermal heat exchanger (55); or - the geothermal heat exchanger (55) is located in a heat exchange connection with the secondary heat network (3, 3', 5, 5', 60, 61, 62, 63), and the secondary heat exchanger (90) is located between the geothermal heat exchanger (55) and the secondary heat network (3, 3', 5, 5', 60, 61, 62, 63) to ensure heat exchange between the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) and the geothermal heat exchanger ( 55). 8. The device according to any one of paragraphs. 5-7, characterized in that - secondary heat network (3, 3', 5, 5', 60, 61, 62, 63) contains two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63), located in heat exchange connection with each other; or - secondary heat network (3, 3', 5, 5', 60, 61, 62, 63) contains two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63), moreover, the subnet heat exchanger (95) is located between two or more secondary thermal subnets (3, 5, 60; 3', 5', 61, 62, 63) to ensure heat exchange between two or more secondary thermal subnets (3, 5, 60; 3', 5', 61, 62, 63); or - secondary heat network (3, 3', 5, 5', 60, 61, 62, 63) contains two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63), moreover, the subnet heat exchanger or subnet heat pump (95) is located between two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63) to ensure heat exchange between two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63). 9. The device according to any one of paragraphs. 5-8, characterized in that - two or more parallel connections (100) of the building are connected to each other by means of a supply line (3, 3') and a return line (5, 5') of two or more secondary heating subnets (3, 5, 60; 3', 5' , 61, 62, 63) and are located in connection with each other with the possibility of heat transfer through the supply line (3, 3') and the return line (5, 5'); or - secondary heat network (3, 3', 5, 5', 60, 61, 62, 63) contains two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63), moreover, one or more heat pumps (95) of the subnet are located between two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63) to ensure heat exchange between two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63); - at least two of the two or more secondary thermal subnets (3, 5, 60; 3', 5', 61, 62, 63) contain one or more building connections (100); and - connections (100) of the building are connected to each other by means of two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63) and one or more heat pumps (95) of the subnet and are located in the connection with each other with the possibility of heat transfer through two or more secondary heat subnets (3, 5, 60; 3', 5', 61, 62, 63) and one or more subnet heat pumps (95). 10. The device according to any one of paragraphs. 5-9, characterized in that the device contains a heating and cooling system according to any one of paragraphs. 1-4. 11. A method for heating and cooling several rooms (80, 81, 82, 83) of a building or buildings (50), including: - circulation of the secondary working fluid in the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63); - performing two or more first stages of heat exchange in parallel in the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) between the secondary working fluid and the primary working fluid of the room (80, 81, 82, 83) a building or building (50) located in connection with two or more other rooms (80, 81, 82, 83) of the building or buildings (50); and - performing the second stage of heat exchange between the secondary working fluid circulating in the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) and the ground with a geothermal heat exchanger (55) located in the hole (2 ) in the ground and located in connection with the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63), characterized in that it includes: - performing the second stage of heat exchange between the secondary working fluid circulating in the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63) and the ground with a geothermal heat exchanger (55) in the hole (2) in ground, and the hole (2) in the ground has a depth of at least 300 m, and the geothermal heat exchanger (55) contains a geothermal network (3, 3', 5, 5') having an ascending pipe (10, 11) and a drain pipe ( 20, 21), wherein the ascending pipe (10, 11) of the geothermal heat exchanger (55) is equipped with a first thermal insulation (25) surrounding the ascending pipe (10, 11) and extending along at least part of the length of the ascending pipe (10, 11) from the surface. (1) land, - controlling the geothermal heat exchanger (55) in a heat recovery mode, in which the second stage of heat exchange includes transferring energy for heating from the ground to the secondary working fluid or geothermal working fluid in the geothermal heat exchanger (55) and circulating the secondary working fluid or geothermal working fluid fluid down the drain pipe (20, 21) and up the riser pipe (10, 11), or - control of the geothermal heat exchanger (55) in the heat supply mode, in which the second stage of heat exchange includes the transfer of energy for heating from the secondary working fluid or from the geothermal working fluid to the ground in the geothermal heat exchanger (55) and the secondary working fluid or geothermal working fluid media down the rising pipe (10, 11) and up the drain pipe (20, 21). 12. The method according to p. 11, characterized in that it includes: - performing at least one of two or more parallel first stages of heat exchange in a heating mode, in which energy for heating is transferred from the secondary working fluid to the primary working fluid of the room (80, 81, 82, 83) of the building or building (50) ; or - performing at least one of two or more parallel first stages of heat exchange in the cooling mode, in which energy for heating is transferred from the primary working fluid of the room (80, 81, 82, 83) of the building or building (50) to the secondary working fluid ; or - performing at least one of two or more parallel first stages of heat exchange in a heating mode, in which energy for heating is transferred from the secondary working fluid to the primary working fluid of the room (80, 81, 82, 83) of the building or building (50) , and performing at least one of the two or more first stages of primary heat exchange in the cooling mode, in which energy for heating is transferred from the primary working fluid of the room (80, 81, 82, 83) of the building or building (50) to the secondary working fluid environment. 13. The method according to claim 11 or 12, characterized in that it includes: - performing two or more parallel first heat exchange stages with two or more parallel primary heat exchangers (30, 31, 32, 33) located in connection with two or more different rooms (80, 81, 82, 83) of the building or buildings (50) ; - control of at least one of two or more primary heat exchangers (30, 31, 32, 33) in a heating mode, in which energy for heating is transferred from the secondary working fluid to the primary working fluid of the room (80, 81, 82, 83 ) building or building (50), and controlling at least one of two or more primary heat exchangers (30, 31, 32, 33) in a cooling mode in which energy for heating is transferred from the primary working fluid of the room (80, 81, 82, 83) buildings or buildings (50) to the secondary working fluid; and - performing district heat exchange between said at least one of two or more primary heat exchangers (30, 31, 32, 33) operating in heating mode and said at least one of two or more primary heat exchangers (30, 31, 32, 33) operating in the cooling mode through the secondary heating network (3, 3', 5, 5', 60, 61, 62, 63).

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