FI119201B - System and manhole for low energy network - Google Patents

Abstract

A system for a low-energy network includes a collector circuit (1a, 1b) filled with a first transfer solution, a heat transfer circuit (7) filled with a second transfer solution, and a terminal (3) adapted to transfer heat between the transfer solutions of the collector circuit (1a, 1b) and the heat transfer circuit (7). The collector circuits (1a, 1b) are connected to the terminal via two distribution reservoirs (82, 81), of which the first distribution reservoir (81) is isolated and configured to receive and transfer heated transfer liquid, and the second distribution reservoir (82) is configured to receive and transfer cooled transfer liquid, and at least one collector circuit (1a, 1b) connecting the first distribution reservoir (81) and the second distribution reservoir (82) is connected to each distribution reservoir (81, 82) terminating the low-energy network. The system may also include a distribution tank (80) for the low-energy network.

Description

119201 System and manhole for low energy network

Background of the Invention

The invention relates to the utilization of low energy, such as geothermal heat 5, and in particular to a system in which heat is transmitted by a terminal device, such as a heat pump or the like, from the ground or water via a transmission solution.

In today's practice, the utilization of low energy from land, water and rock means heating a building and domestic hot water using a pump and a brine circuit. The operating principle of such a geothermal heating system is similar to that of a freezer, but the reverse is that the system cools the earth and heats, for example, a water heater. Often 2-3 units of heat are obtained per unit of electric energy used. The efficiency is significantly better than in direct electric heating. In cold climates, the heating energy consumption of buildings is considerable. The use of geothermal energy is becoming increasingly profitable as electricity and oil costs rise.

Alternatively, the underground heat pump system can also be used to cool the interior, for example by circulating cool solution from the ground through a cooler in the supply air stream.

One common way of taking heat is by installing • • 20 perpendicular pipelines to a depth of 1 - 1.2 meters. However, such piping requires a large surface area, so that it can only be used on large sites. The collection district may be ·: ··· on land or in water. Placing the horizontal pipeline on the ground requires • digging the pipeline across the collection area. Circuit pipe flanges should be • •· ·. . ·. 1.5 m apart so that adjacent loops do not interfere with each other · · *. ···, 25 heat uptake. Laying a horizontal pipe, for example, in a park • is difficult without damaging plants and tree roots.

. . A thermal well is another common way of absorbing heat. This is where the piping is embedded in a hole drilled into the rock. The thermal well, i.e. the borehole, is usually drilled vertically. Very little surface area is required for the thermal well compared to horizontal manifolds. However, there may be significant · · *. *** on the rock. a layer of loose soil. to create a portion will be equipped with a protective tube, which will increase the cost. Thus, soil with a thick layer of loose soil restricts the placement of a warm * · * ··· 'well. The heat output in the heat well is generally higher than the horizontal piping. The heat recovery from the thermal well depends in part on the groundwater flow 119201 2. However, it is impossible to estimate groundwater flow without implementing expensive drilling.

A third way of taking heat is to place the heat inlet pipe at the bottom of a lake or other body of water, whereby heat is transferred from the bottom sediment and water to the intermediate solution. The pipeline can be transported to water on land, but in this case there must be separate trenches for the supply and return pipes. Plumbing is easy to install at the bottom of the water. However, the solution-filled tube is lighter than water and tends to rise upwards. Elevated pipe sections can cause air pockets that can hinder circulation. The tube must therefore be anchored to the bottom with sufficient weights. Bottom piping is also prone to breakage. The boat anchor or the like can seize the pipeline and break the pipe. At the water's edge, the inlet and return pipes will be dug to prevent ice from breaking the pipeline.

The choice between these three methods depends on the location, area and soil available. Earlier attempts have been made to implement geothermal networks so that several houses have one common larger collector circuit. However, connecting more properties to such a system requires a corresponding extension of the brine circuit.

BRIEF DESCRIPTION OF THE INVENTION The object of the invention is thus to provide a low-energy system. . network and a system manhole so that the above problems can be resolved. The object of the invention is achieved by a system and a manifold, which is characterized by what is stated in the independent claims. Preferred embodiments of the invention are the subject of the dependent claims.

The invention is based on the fact that the manifolds of the low energy network are connected to one another by a trunking space, and that ground circuits can be connected to the manifolds and, if necessary, heat transfer circuits via a terminal. The terrestrial circuits may be implemented in each location in a suitable manner.

. ···. 30 Therefore, the land district may also be located at the bottom of the water body. In addition, the system is expandable, or alternatively heating or ground circuits can be removed or closed without limiting the operation of other parts of the system.

One object of the invention is to provide a system with a low energy network. ton.

Another object of the invention is to provide a manhole for low-energy retaliation.

3, 119201

According to an embodiment of the present invention, the system comprises a collection circuit filled with a first transmission solution, a heat transfer circuit filled with a second transmission solution and a terminal adapted to transfer heat between the collection circuit and the heat transfer circuit transmission solutions equipped with a receiving and conveying heated transmission fluid and a second manifold equipped with a receiving and conveying cooled delivery fluid, and each of the low power network terminating manifolds having at least one collecting circuit connecting the first manifold and 10 second manifolds. Here, the terminating manifold is the one from which the network begins or ends. The network according to the invention does not define the form and routes of the network. The network can be implemented in a circular manner, whereby the network begins and ends in the same terminating manifold. Similarly, the network according to the invention may be star-shaped with several terminating manifolds. One advantage of the invention is that the network can be extended without restriction. For example, any circuit-like network manifold can be connected to a network extension by backbone and manifolds. In this case, the separate manifolds from the circuit act as terminating manifolds.

According to one embodiment, the first manifolds and the second manifolds are connected together in the manhole. The manifolds are arranged in manifolds. . the well with a dielectric section between the distribution tanks to reduce heat transfer between the distribution tanks.

• ·: "The manholes are connected by a first frame tube to a terminal device, such as a ground source heat pump or the like, for transferring a cooled transmission solution • *! The thickness of the insulation of the first frame pipe can be increased or decreased depending on the installation depth or distance between the frame pipes. · **. 30 Preferably, the frame pipes can be placed in the same excavated ditch. , but can be, for example, 1 to 2 meters, whereby · an uninsulated trunk can receive heat from the ground.

. · * ·. The second frame pipe is insulated so that thermal energy can be transferred between the transmission fluid in the pipe and the soil outside the pipe.

• · 4 119201 In this case, the main pipes also serve as part of collecting circuits, which can be used for both heating and cooling of buildings.

According to one embodiment of the invention, each ground circuit connected to the manifold is provided with measuring means and adjusting means such that the heat output of each of the 5 collecting circuits is measurable and the flow rate of each collecting circuit is individually adjustable to meet the needs of the terminals. This allows the use of a control system to electrically control the manhole control means. The connection of the manhole control means and the measuring means to the control system may be a wireless communication connection instead of a wired connection 10. Wireless connection to the control system can facilitate system implementation, for example, in connection with system extensions.

By means of the control system, the flow of the various collecting circuits can be limited so that the terminal receives transmission fluid from the most advantageous collecting circuit or collections. In other words, the flow rates of the collecting circuits are controlled by the control system so that the temperature of the transmission fluid is set at a level where the efficiency of the terminals is as high as possible. In this case, one terminal can utilize the so-called. in addition to or instead of your own collection district, other collection districts connected to the system.

20 It is not possible for all properties to have their own collection districts.

(.a. In the solution according to the invention, such real estate can also be connected to the system via terminals. Billing can be based on measuring equipment connected to the • ·: "telecommunication devices. It is an advantage of the invention that the flow of collecting circuits can be implemented the pump.

• ·!.:: 25 With all terminals closed, the flow stops and the temperature of the transfer fluid is set to the temperature of the surrounding soil or water. However, it is possible, for example, for larger systems to be equipped with a separate pump.

It should be noted, therefore, that manholes can be provided in the network. 30 without a single district. This may be the case, for example, in the case of a block of flats, where several heating circuits of a property are connected to a single manhole and the ground circuits are implemented, for example, in a nearby field or even under a park.

• · ·

There is a dry · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · each. However, at least one ground circuit is connected so that the transmission solution can be transferred from one frame to another without directly mixing the cooled and warmed fluid.

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The land circuit can be selected according to the location of the manhole. The earth circuit may be, for example, a horizontal circuit, a horizontal or inclined tube having an outer and inner tube, a well drilled in a rock, or a plumbing. One or more terrain circuits may be located in a single manhole depending on location and soil.

According to another aspect of the invention, the manhole for the low-energy network comprises two tanks, a first tank and a second tank, the first tank for receiving and transmitting the heated transmission fluid and the second tank for receiving and transmitting the cooled transmission fluid. The tanks have a trunk tube receiving means for receiving the trunk tubes in the first and second spaces, respectively, and a receiving means for ground and / or terminal pipelines to receive the pipelines in the first and second spaces, respectively. The number of terrestrial and / or terminal receiving means may vary. The manhole can be prepared for connection under factory conditions, so it would be advantageous to reserve additional connection points for possible network extensions or modifications.

The first container and the second container are separated by an insulating portion. The insulation portion is intended to minimize heat transfer between cold and earth-warmed liquid. Preferably, the first 20 and second reservoir of the manhole have a volume which stores liquid in the reservoir.

. The manifolds equalize the flow of the pipelines and allow a steady flow control for each pipe leaving the manifold.

BRIEF DESCRIPTION OF THE DRAWINGS · * · *: 25 The invention will now be described in greater detail in connection with preferred embodiments, with reference to the accompanying drawings, in which:

Figure 1 is a schematic view of an embodiment of a system according to the present invention; T · (M (Fig. 2 shows another embodiment of the system '*: ** 30 of the present invention;

Figure 3 illustrates a system according to the present invention: ***: a third embodiment; ···, ···, Fig. 4 is a front view of a manifold according to the present invention; Figure 5 is a front view of another embodiment of a manhole according to the present invention; 6119201

Figure 6 shows a top view of another embodiment of a manhole according to the present invention;

Figure 7 is a partial view of an embodiment of a pipe end portion to be connected to a manhole according to the present invention.

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DETAILED DESCRIPTION OF THE INVENTION

Referring to Figure 1, an embodiment of the system of the present invention is shown, wherein a tube Lao with an inner tube and an outer tube is inclined below the ground and the second collecting tube 1b is a one-piece circuit forming tube. The terminal 3 utilizes the low energy accumulated in the pipelines 1a and 1b and transmits it to the house 2 via the transfer tube 41, where it circulates through the heat transfer circuit 7 and returns via the transfer tube 42 back to the collecting pipeline 1a, 1b. The number, length and inclination of the pipes 1a, 1b, etc. may vary according to the energy requirement and / or the soil.

The terminal 3 may be, for example, a ground source heat pump. The terminal 3 is connected to the collecting circuits 1a and 1b via manholes 80. The collecting circuits 1a and 1b are connected to the terminal 3 via two distribution tanks 82, 81. The first manifold 81 is insulated and equipped to receive and transmit a heated delivery fluid and the second manifold 82 is provided to receive and deliver a cooled manifold. For each low- * · '*! connected to the terminating distribution tanks of the energy network is a single collection circuit 1a, 1b connecting the first distribution tank 81 and the second distribution container 82. Thus, the transmission solution can be transferred from one body tube to another without direct mixing of the cooled and warmed liquid. Figure 1 shows only two manhole: *: 25 wells 80, but it is clear that the system may comprise multiple manholes 80.

• • e. ***. Then, manifolds, which have no collector circuits at all, may be disposed between manifolds 80 terminating the system, but in addition to trunk pipes 100, 200, transfer pipes 41, 42 for real estate terminals. For example, a suitable · · · M joint pipe may be connected directly to the frame pipes 100, 200 (not shown) of 2 single pipe 2: * 30 pipes.

Figure 2 shows a system according to the present invention: [*]: another embodiment. Connecting to the manhole 80 on the left is the terminal 3 of the two houses 2 and the terminal 3 of the manhole 3 to the right 3. The flow 35 of the manifolds connected to the manhole 80 is controlled by the control system 50. In the heating case, when the transmission fluid of the collecting circuit 1b is warmer than the fluid of the collecting circuit 1a 7 119201, the control system may limit the flow of the collecting circuit 1a and increase the flow of the collecting circuit 1b so that the terminal can receive the most advantageous thermal transmission fluid. The opposite is, of course, the case with cooling.

The control system 50 is preconfigured with information from each of its associated collection circuits, allowing it to limit or increase the flow of each collection circuit to achieve the desired end temperature. In addition, the temperature of the return fluid from the manifold is measured by measuring means in response of which the control system can perform a control operation. The control system may have information, for example, on the length of the trunk, so that it can also take into account the temperature change in the trunk.

Figure 3 illustrates a third embodiment of a system according to the present invention, wherein control system 50 is connected to a second manhole via a wired connection and to a second manhole 80 via a wireless connection. In the case of a wireless connection, the control system 50 and the manhole are provided with suitable transmitting and receiving means 51a, 51b. The control system 50 is preferably connected to a data network, such as an Internet network. This enables remote monitoring and control of the system.

Figure 4 shows a front view of an embodiment of a manhole 20 according to the present invention. The manifold 80 comprises a first container. . 81 and a second container 82, of which the first container 81 is designed to receive and transmit a heated transmission fluid and the second container 82 is designed to receive and transmit a cooled transmission fluid. The containers include a body tube receiving means 110, 210, 200 to receive the first and second manifolds 81, 82. The trunk receiving means 110, 210 are here tubular portions of the manhole 80, external to which the trunk 100, 200 may be connected In addition, the figure shows the receiving means 11, 12 of the ground circuit and / or terminal apparatus for receiving the piping, ···. 30, respectively, for the first and second states 81, 82. The figure shows only "* one pair of each receiving means, but it is clear that their number may vary.

With the receiving means 11, 12, 110, 120 manufactured in such a way that their ends are closed before installation, their number * * t '\ 35 can be set larger, taking into account the possible expansion of the system.

It would then be advantageous to reserve at least one additional pair of 119201 8 trunk receiving means 110,120 for each manhole. The first receptacle 81 and the second receptacle 82 of the manhole 80 are separated by an insulating portion 86. The figures show an embodiment in which the manhole is viewed from above and the manifolds are semi-circular. However, it is clear that both the ja-5 well and the tanks therein may have different shapes. For example, the manifolds may also be superimposed, so that they may also be cylindrical in shape. It is also possible to place the distribution tanks separately, for example in larger systems with a large number of pipes to be connected.

Figure 5 shows a front view of another embodiment of a manhole according to the present invention. The manhole 80 is provided with measuring means 83 and adjusting means 85. Measuring means 83 are located here in the ground pipeline receiving means 11 and control means 85 in the ground piping receiving means 12. However, the positioning of the measuring means 83 and adjusting means 85 15 may vary, for example. Two arrows illustrate heat transfer from the ground to an uninsulated second manifold 82. In addition, the system may comprise barrier means (not shown) to separate one or more sections of the network during, for example, a network bump or expansion.

Figure 6 shows a manhole according to the present invention. . top view of another embodiment. The dielectric portion 86 is disposed between the first dispensing container 81 and the second dispensing container 82.

Fig. 7 is a partial view of an embodiment of the end portion of pipe 1a (shown in Figs. 1-3) to be connected to a manhole according to the present invention. The transfer fluid is transferable through the lid 60 of pipe 1 to the manhole. a coupling sleeve 61 connected within a pipe:] ** 1 to an inner pipe 10 and an outer coupling sleeve 62 for directing the transmission fluid of the outer pipe 20. The cover portion 60 may be connected to the manifold pipes by conventional methods, e.g. · .30 by getting.

It will be obvious to a person skilled in the art that as technology advances, the basic idea of the invention can be implemented in many different ways. The invention and its embodiments are thus not limited to the examples described above, but can vary. within.

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Claims (10)

119201 A system for a low energy network, comprising: - a collection circuit (1a, 1b) filled with a first transmission solution, - a heat transfer circuit (7) filled with a second transmission solution, a terminal 5 (3) adapted to transfer heat to the ) between transmission solutions, characterized in that the collecting circuits (1a, 1b) are connected to the terminal device (3) via two distribution tanks (82, 81), of which the first distribution tank (81) is insulated and is provided for receiving and transmitting the heated transmission fluid and a second manifold (82) is provided for receiving and transmitting cooled transmission fluid, and each of the manifolds terminating the low energy network is provided with at least one collecting circuit (1a, 1b) between the first manifold (81) and the second manifold (82). System according to Claim 1, characterized in that the first manifolds (81) and the second manifolds (82) are connected together in the manifold (80) with an insulating part (83) between the manifolds. System according to claim 1 or 2, characterized in that the distribution tanks (82, 81) are connected to one another by a first frame, ·. : with a pipe (100) and a second frame pipe (200), one of which is arranged such that heat energy can be transferred between the transmission fluid in the pipe and the soil on the outside of the pipe. A system according to claims 1-3, characterized in that each collection circuit (1a, 1b) connected to the distribution tanks (81, 82) is provided with measuring means (83) and adjusting means (85), that the heat output of each collecting circuit is measurable by the measuring means (83) and that the flow rate of each collecting circuit (1a, 1b) is individually adjustable by the adjusting means as required by the terminals: Y: 1: 30 The system of claim 4, characterized by ··· *. further comprising a control system (50) for electrical control of the control means (85). The system according to claim 5, characterized in that: 1: the connection between the manhole control means (85) and the control system (50) ··· 35 is a wireless communication connection. 119201 System according to one of the preceding claims, characterized in that the second frame tube (100) has an insulating layer. System according to claims 1-5, characterized in that the piping connected to the manhole comprises closing means. A manhole for a low-energy network, characterized in that it comprises: two tanks (82, 81), a first tank (81) and a second tank (82), the first tank (81) for receiving and transmitting the heated shear fluid and the second tank (82). 82) for receiving and transmitting cooled transmission fluid, the tanks (81, 82) having: - a trunk tube receiving means (110, 210) for receiving the trunk tubes (100, 200) to the first and second manifolds (81,82) respectively, , 1b) and / or pipeline receiving means 15 (11, 12) of the terminal (3) for receiving the pipelines to the first and second spaces (81, 82) respectively. A manhole according to claim 9, characterized in that the first reservoir (81) and the second reservoir (82) are separated by an insulating portion (86). 20 • • • • • • • • ** ** • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • * ** ·· • · • · · »·« · • · * · • · • · «· · • ·« · • · September 1 9 9 9 • 999 9 9 9 9 9 9 9 9 9 9 9 9 9 119 201