KR20110021501A - Complex heating and cooling system using new renewable energy as heat source - Google Patents

Abstract

PURPOSE: A complex heating and cooling system using renewable energy as heat source is provided to improve the heating and cooling performance using convection and radiation. CONSTITUTION: A complex heating and cooling system using renewable energy as heat source comprises a heat exchanger, a flux controller, a ventilation device part(54), a heat radiating part(53) and a controller. The heat exchanger preheats or supplies pre-cooled fluid by using recyclable energy. The flux controller distributes the fluid provided from the heat exchanger. The ventilation device part receives the fluid using the flux controller and controls the air of the building indoor using convection heat transfer. The heat radiating part cools and heats the indoor using radiant energy transfer. The controller is connected to the flux controller. The controller controls a rate between the amount of fluid divided from the ventilation device part and the amount of the fluid divided from the heat radiating part.

Description

Complex heating and cooling system using new renewable energy as heat source

The present invention relates to a complex air-conditioning system and a dual heat source supply system using renewable energy as a heat source.

Recently, due to the government and local government's mandatory policy on the use of renewable energy, the installation of renewable energy facilities in buildings is gradually increasing, and the importance of the use of clean energy is increasing. In particular, the geothermal heat pump system installed in residential buildings, such as multi-unit houses, is a system that enables cooling, heating, and hot water supply indoors by using the temperature difference between the ground and the air temperature, which maintains a constant temperature every year. It is an excellent system.

However, the geothermal heat pump system, which is installed as a renewable energy system in residential buildings such as multi-family houses, degrades the performance of the system due to the thermal accumulation of the ground and the deterioration of the heat recovery power as time passes after the start of cooling and heating operation. Accordingly, there is a need for stable supply of a heat source and securing reliability of the system, such as problems in cooling and heating indoors and maintaining a constant hot water supply temperature.

On the other hand, the floor heating system installed as a heating system of residential buildings, such as apartment houses, by supplying hot water heated by the boiler to the hot water coil embedded in the floor of the room to heat the weight structure of the floor, which is discharged from the floor surface Radiant heat is used to raise the room temperature to the heating set temperature and heat it.

Conventional floor heating system is generally heating a heavy structure, so it takes a long time to increase the room temperature to the heating set temperature, there was a thermal discomfort to stay cold for a certain time after the start of heating.

Recently, as the lifestyle changes such as the increase in the number of working couples, there is an increasing demand for a heating method that shows a rapid heat response rate after the start of heating. Furthermore, in order to cool in summer, a separate air conditioner using electricity as a heat source must be installed. As a result, there are many problems caused by the occupants having to bear excessive power usage fees or limited use time due to the progressive agent due to the use of power.

The floor ondol heating system is heated for a certain time due to the heat accumulated in the structure even after the heating is stopped.In spite of the above-mentioned problems due to the thermal comfort of radiant heating and the habit of living habits of residents familiar with the ondol culture. It is used continuously. Therefore, there is a limitation that separate heat source devices and devices such as ondol heating and air conditioners are still used for heating and cooling of residential buildings.

The background art described above is technical information possessed by the inventors for the derivation of the present invention or acquired in the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention.

The present invention, by distributing the heat source supplied by using renewable energy, such as domestic sewage heat, underground heat, to the ventilation system and ondol heating, it is possible to implement air conditioning and heating combined with convection and radiation, the thermal comfort of the occupants It is to provide a combined air-conditioning system and a dual heat source supply system using renewable energy as a heat source that can improve the feeling and save energy.

According to an aspect of the present invention, by utilizing the renewable energy, the heat exchange unit for supplying the preheated or pre-cooled fluid, the flow control unit for distributing the fluid supplied from the heat exchange unit, and the fluid is distributed by the flow control unit convection Ventilation unit for cooling and heating the interior of the building by heat transfer, radiant cooling and heating unit for cooling and heating the room by radiant heat transfer, and fluid is distributed by the flow control unit, and connected to the flow control unit, which is distributed to the ventilation unit. A complex air conditioning system is provided that includes a control for controlling the ratio between the amount of fluid and the amount of fluid dispensed into the radiant heating unit.

The heat exchange part includes a domestic sewage heat exchanger for preheating or precooling a fluid using heat recovered from domestic sewage as a first heat source, an underground heat exchanger for preheating or precooling a fluid using underground heat as a second heat source, a domestic sewage heat exchanger, and underground A switching valve for selecting any one of the heat exchangers and allowing one of the first heat source and the second heat source to exchange heat with the fluid, a heat pump for supplying hot or cold water using the heat exchanger selected by the switching valve as a heat source; It may include a heat storage tank for storing the hot water or cold water supplied from the heat pump to supply to the flow control unit.

In addition, the heat exchange unit may further include a boiler as an auxiliary heat source device for heating hot water stored in the heat storage tank, and may further include a cogeneration generator for supplying waste heat to any one or more of a heat pump or a boiler.

The ventilator unit is connected to the total heat exchanger and the total heat exchanger that recovers heat from the exhaust discharged from the indoors to the outdoor air and is introduced to the indoor air, and serves as an exhaust passage. An exhaust duct, an air supply duct connected to the heat exchanger and acting as a passage for the air supply, and a cold and hot water coil coupled to the air supply duct, and the fluid flowing therein, wherein the air supply flows in close proximity to the cold and hot water coil. It can be heated or cooled through heat exchange. The radiant heating unit may include a hot water coil for heating the floor embedded in the floor of the room.

On the other hand, according to another aspect of the present invention, a system for providing a heat source supplied to the heating and cooling system of the building, the living sewage heat exchanger for preheating or pre-cooling the fluid using the heat recovered from the living sewage, geothermal heat A switching valve that selects any one of the underground heat exchanger for preheating or precooling the fluid as the second heat source, the domestic sewage heat exchanger, and the underground heat exchanger so that any one of the first heat source and the second heat source exchanges with the fluid. And a heat pump for supplying hot water or cold water using the heat exchanger selected by the switching valve as a heat source, and a heat storage tank for storing the hot water or cold water supplied from the heat pump and supplying the cooling water to a cooling and heating system.

The auxiliary heat source device for heating the hot water stored in the heat storage tank may further include a boiler, and may further include a cogeneration generator for supplying waste heat to any one or more of the heat pump or the boiler.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

According to a preferred embodiment of the present invention, by preheating or precooling a fluid by using renewable energy or renewable energy such as domestic sewage heat, ground heat, and the like, it is possible to reduce energy required to supply a heat source to a cooling and heating system. By distributing the heat source to the ventilator and the floor heating system using a flow distributor or a flow control valve, the heating and cooling by convection and the floor radiation can be performed simultaneously. Therefore, the long heat response time of the floor heating system The shortcomings of the system can be improved by convection air-conditioning by ventilation system to improve the thermal comfort of the occupants, and the energy saving of the entire building can also be achieved by adopting a geothermal heat source heat pump with excellent thermal efficiency for utilizing renewable energy.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a system diagram showing a complex air conditioning system according to a first embodiment of the present invention. Referring to FIG. 1, the underground heat exchanger 14, the heat pump 15, the heat storage tank 31, the boiler 32, the control unit 122, the flow control valve 16, the ventilator unit 54, the cold and hot water coil (38), the radiant heating and heating unit 40, and the hot water coil 42 are shown.

The present embodiment is characterized by saving energy by using new and renewable energy such as domestic sewage heat and underground heat as part of the heat source, and air conditioning system that complements the shortcomings of the long heat response time of the floor ondol heating system with convection air conditioning.

Air conditioning system according to the present embodiment is largely composed of a heat exchange unit, a ventilation unit 54, a radiant cooling and heating unit (40). The heat exchanger serves to save energy required for cooling and heating the building by utilizing domestic sewage and ground heat in generating and providing a heat source, and the ventilation unit 54 cools and heats the room by convective heat transfer. Air conditioning unit 40 is a component for heating and cooling the room by radiant heat transfer.

The hot or cold water supplied from the heat exchanger is distributed to the ventilation unit 54 and / or the radiant heating and cooling unit 40 by the flow control unit, and the control unit 122 is connected to the flow control unit so that each cooling and heating unit (ventilator) The ratio of the hot water or cold water distributed to the unit 54 and the radiant cooling and heating unit 40 is adjusted.

The heat exchange part is a part for supplying hot or cold water by preheating or precooling water by utilizing domestic sewage heat or underground heat, and for example, as illustrated in FIG. 1, an underground heat exchanger 14 for using underground temperature. And a heat pump 15 having a refrigerant pipe, and a heat storage tank 31 for storing heat generated by the heat pump 15. On the other hand, the boiler 32 may be connected to the heat storage tank 31 for further heating the preheated hot water in case the hot water of sufficient temperature is not generated only by the ground heat.

Ventilation unit 54 and the radiant heating and cooling unit 40 is a component for cooling and heating the room by receiving the fluid distribution by the flow control unit, the ventilation unit 54 by the convection heat transfer, radiant heating and cooling unit 40 is Radiant heat transfer heats the room.

Thus, by adding a ventilator unit 54 to the radiant air-conditioning unit 40, such as the floor ondol heating, by heating and cooling the room, thermal discomfort during the time required to heat the structure of the weight, which is a disadvantage of conventional ondol heating, and ondol Problems such as condensation and unpleasantness of the occupants, which are disadvantages of cooling, can be solved.

The ratio of the amount of fluid supplied to the ventilator 54 and the amount of fluid supplied to the radiant heating and cooling unit 40 may be controlled by the controller 122 connected to the flow controller, for example, the initial stage of the floor structure. During the preheating time, the hot water is distributed to the ventilator unit 54 to heat the room, and after the floor structure is sufficiently preheated, the hot water is distributed to the radiant cooling and heating unit 40 so that a comfortable heating can be achieved. have.

That is, after the heating operation starts, the heat response of the indoor heating system is controlled by simultaneously controlling radiant heating and convective heating by adjusting the flow rate of the hot water supplied to the radiant cooling unit 40 and the ventilator unit 54 by the flow rate adjusting unit. The time can be shortened, and in the case of the conventional floor ondol heating method, it is possible to solve the cold feeling felt by the occupants for a certain time after the start of heating operation.

On the other hand, during the cooling operation, by blocking the flow rate supplied from the flow rate control unit to the radiant cooling unit 40, all the cold water is supplied to the cooling coil of the ventilator unit 54, condensation occurs in the conventional floor ondol cooling method. It can solve the problem that the occupants feel uncomfortable, and can effectively cool the indoor space.

The flow control unit according to the present embodiment may be implemented in the form of a flow distributor or a flow control valve, or a constant flow valve and a gate valve as shown in Figure 1, the control unit 122 to each flow control valve 16 It can be implemented as part of a building control system for remote control of a connected controller or flow control valve 16.

In addition, the flow rate adjusting unit according to the present embodiment is not necessarily installed in front of the ventilation unit 54 or the radiant heating unit 40, and the fluid supplied to the ventilation unit 54 and the radiant heating unit 40, respectively. It may be installed at any point on the pipe through which the fluid flows within a range in which the ratio of (hot or cold water) can be adjusted.

2 is a conceptual diagram illustrating a complex air conditioning system according to a first embodiment of the present invention. Referring to FIG. 2, the heat exchanger 10, the underground heat exchanger 14, the heat pump 15, the heat storage tank 31, the boiler 32, the flow rate control unit 20, the control unit 122, and the flow rate control The valve 16, the ventilator 54, the total heat exchanger 18, the exhaust duct 34, the air supply duct 36, the cold and hot water coil 38, the radiant cooling and heating unit 40, and the hot water coil 42 are shown. It is.

The present embodiment is a radiant and convection air-conditioning system using renewable energy, the heat exchanger 10 for utilizing the renewable energy, for example, as shown in Figure 2 underground heat exchanger 14, heat pump ( 15), the heat storage tank 31 and the like.

The underground heat exchanger 14 is a part buried in the ground to preheat or precool the fluid through heat exchange between the ground heat and the fluid, and the heat pump 15 uses hot water or the preheated and precooled fluid in the underground heat exchanger 14. Cold water is supplied, and the heat storage tank 31 serves to store hot water or cold water supplied from the heat pump 15.

The heat storage tank 31 may be connected to the boiler 32 for further heating the preheated hot water when the hot water is not sufficiently heated only by the ground heat. As such, the hot water or cold water stored in the heat storage tank 31 is distributed to each cooling and heating unit by the flow control unit 20.

For example, in the case of heating operation, the underground heat exchanger 14 installed in the ground is used as an evaporator to absorb heat in the ground, and the heat storage tank 31 is used as a condenser for dissipating heat of high temperature and high pressure. ) You can warm the water inside. When the temperature of the warmed hot water is lower than the temperature for use for heating, the heater is heated once more by using the boiler 32, and the ventilation unit 54 and / or radiation installed indoors by the flow control unit 20 are provided. The heating and cooling unit 40 is distributed.

In the case of the cooling operation, the refrigerant flows in the opposite direction to the heating operation by the operation of the cooling / heating switching valve (four-way valve) included in the heat pump 15. Accordingly, the underground heat exchanger 14 and the heat storage tank 31 are operated. ) The function is also switched. That is, the underground heat exchanger 14 serves as a condenser that emits heat, and the heat storage tank 31 serves as an evaporator that absorbs heat. The cold water of the heat storage tank 31 generated and stored through heat exchange with a low temperature and low pressure refrigerant is supplied to the cooling coil of the ventilation unit 54 installed indoors by the flow control unit 20 and used to cool the room. do.

As such, by using the heat exchanger 10 to generate and store hot or cold water using domestic sewage heat or underground heat, energy required for heating and cooling of a building can be saved.

On the other hand, the ventilator 54 according to the present embodiment is implemented in the form of a so-called 'array recovery ventilator' that saves energy in the building by performing heat exchange between the air supplied to the interior and the exhaust exhausted from the outside to the outside. Can be.

Ventilation equipment is one of the facilities installed from the building construction process for air conditioning and indoor ventilation of the building, the recent trend is that the ventilation system is installed in most apartment houses as the demand level of the residents' indoor environment is improved.

Therefore, when using a ventilator as in the present embodiment, it is not necessary to add a separate facility for cooling and heating by convection heat transfer, the heat recovery ventilator can preheat the temperature of the introduced outside air to a certain degree in advance, saving energy And a synergistic effect of increasing heat utilization efficiency.

The ventilation apparatus according to the present embodiment includes a total heat exchanger (18), and the air supply duct (36) and the exhaust duct (34) are connected to the heat exchanger (18), respectively, so that the residual heat from the exhaust is transferred to the air supply. can do. Referring to FIG. 2, the outside air OA recovers residual heat from the air RA discharged from the room while passing through the heat exchanger, and is supplied to the room as preheated or precooled air supply SA, and discharged from the room. RA transmits residual heat to the outside air OA and is exhausted to the outside.

In addition, as shown in FIG. 2, by installing the hot and cold water coil 38 in the air supply duct 36, the hot or cold water distributed and supplied by the flow controller 20 flows through the hot and cold water coil 38. The air supply can be heated or cooled.

That is, during heating, the hot water supplied from the heat exchanger 10 flows through the cold / hot water coil 38, and the air supplied through the air supply duct 36 is heated while passing through the cold / hot water coil 38 to heat the room. It may be heated, and during cooling, the cold water supplied from the heat exchange unit 10 flows through the hot and cold water coil 38, and the air supplied through the air supply duct 36 passes through the cold and hot water coil 38 to be cooled. By doing so, the room can be cooled.

As such, the ventilator 54 according to the present exemplary embodiment further includes a cold / hot water coil 38 through which hot water or cold water supplied from the heat exchange part 10 may flow, thereby providing an air supply passing through the air supply duct 36. It may be implemented in the form of a 'heating and cooling ventilator' is further added to the heating and cooling function to increase or decrease the temperature.

On the other hand, the radiant heating and heating unit 40 according to the present embodiment, the ondol heating hot water coil 42 and the supply header 51, the return header 52, the circulation pump 71 embedded in the floor of the room from the construction process of the building ), It may be implemented in the form of a floor ondol heating system including a differential pressure valve (61). In this case, components such as a supply header, a return header, a circulation pump, and a differential pressure valve may perform a role of simultaneously supplying, circulating, and returning hot or cold water to the ventilator unit 54 as illustrated in FIG. 1. have.

In the above, embodiments of the complex air-conditioning system utilizing ground heat as renewable energy have been described. In addition to geothermal sources, various types of renewable energy or renewable energy such as local air-conditioning, water heat source, sewage heat source, absorption chiller, etc. Complex air conditioning systems can also be implemented. For example, the heat exchanger 10 including the underground heat exchanger 14, the geothermal heat pump 15, and the heat storage tank 31 may be replaced with an absorption chiller.

Hereinafter, with reference to FIG. 3, the Example which utilizes living sewage and underground heat as a dual heat source as a heat source of an air conditioning system is demonstrated.

Figure 3 is a system diagram showing a cooling and heating system using a dual heat source of domestic sewage heat and ground heat according to a second embodiment of the present invention. 3, the domestic sewage treatment apparatus 11, the domestic sewage treatment water tank 12, the domestic sewage heat exchanger 13, the underground heat exchanger 14, the evaporator 21, the condenser 22, the switching valve ( 23, compressor (24), expansion valve (25), heat storage tank (31), boiler (32), cogeneration generator (41), supply header (51), return header (52), heating device (53), ventilation The device section 54, the differential pressure valve 61, the gate valve 62, the constant flow valve 63, the switching valve 64, and the circulation pump 71 are shown.

The present embodiment generally starts the operation of the geothermal heat pump system by using the heat of domestic sewage, which is usually discarded in daily life, simultaneously or selectively with the ground heat by the heat exchanger 13 and the switching valve 23 (three-way valve). It is to improve the performance of the system by improving the speed of heat recovery generated over time and to secure stable supply and reliability of the heat source.

In addition, in the air-conditioning and heating system installed indoors, radiant heating and convection by controlling the flow rate of hot water supplied to the heating coil of the floor heating system and the heat recovery ventilator 54 using a flow distributor or a flow control valve after the start of heating operation. It is possible to improve the heat response time by enabling heating at the same time, and to solve the cold feeling that the occupants feel for a certain time after the start of heating operation in the floor heating system. During the cooling operation, the flow rate may be blocked by using a flow distributor or a flow control valve, and the flow rate may be supplied only to the cooling coil of the heat recovery ventilator 54 to cool the indoor space.

That is, the present embodiment is a cooling and heating system using living sewage heat and ground heat generated in daily life as a dual heat source, living sewage treatment apparatus 11, living sewage and underground heat exchangers 13 and 14, living sewage and underground Heat pump using conventional ground heat by using switching valve 23 (three-way valve) which can selectively use heat, and heat pump which can produce cooling heat and heat using domestic sewage and temperature difference energy between ground heat and air temperature It is characterized by solving the problem of deterioration of performance due to underground heat accumulation which is a disadvantage of the system.

In addition, the heat source system using a dual heat source, such as domestic sewage heat and underground heat, by connecting the heat storage tank 31, the boiler 32, the heat recovery ventilator unit 54, cold and hot water coils, flow distributors or flow control valves By constructing the present invention, thermal discomfort generated during the time required to heat a heavy structure, which is a disadvantage of the conventional floor ondol heating system, condensation occurring when the floor underfloor cooling system is applied, and inconvenience to the occupants are provided. It is characterized by the solution.

In addition, by additionally connecting and using the small cogeneration generator 41, the generated electricity and waste heat can be used as the driving heat source of the heat pump, the indoor supply heat source and the supply heat source of the boiler 32, respectively.

To this end, the cooling and heating system according to the present embodiment, the heat exchange unit for supplying the pre-heated or pre-cooled fluid by utilizing the renewable energy, the fluid supplied from the heat exchange unit to the ventilator unit 54 and the floor heating device 53 It is composed of a flow distributor or a flow control valve for distributing, respectively, the ventilator 54 and the floor heating device 53 is to heat the room using the distributed fluid. The flow control unit may be connected to a control unit for adjusting the distribution amount of the fluid.

The heat exchange unit utilizes dual heat sources, namely, domestic sewage heat and ground heat, and for this purpose, as shown in FIG. 3, a device for treating domestic sewage, a living sewer and a heat source recovered from the ground heat are used to preheat or Switch valve 23 (three way valve) for selectively using the pre-cooling domestic sewage heat exchanger 13 and the underground heat exchanger 14, the domestic sewage heat exchanger 13 and the underground heat exchanger 14 as needed. It may be composed of a heat pump for supplying hot or cold water by using the temperature difference between the living sewage or underground temperature and air temperature, and a heat storage tank 31 for storing heat generated by the heat pump.

The heat stored in the heat storage tank 31 is supplied to the above-described ventilation unit 54 and / or the floor heating device 53 and used to cool and heat the room. Furthermore, the boiler 32 may be further installed as an auxiliary heat source device for heating hot water stored in the heat storage tank 31, and selectively supplying heat to the driving heat source and the auxiliary heat source device (boiler 32) of the heat pump. Small cogeneration generator 41 may be additionally installed. Such a heat exchange unit according to the present embodiment may be used as a 'double heat source supply system' for providing a heat source supplied to the building's cooling and heating system.

In the heating operation, the domestic sewage heat exchanger 13 installed after the domestic sewage treatment apparatus 11 and the underground heat exchanger 14 installed in the ground are used as the evaporator 21 to absorb heat, and the heat storage tank 31 is It is used as a condenser 22 for dissipating heat of high temperature and high pressure, and the fluid inside the heat storage tank 31 can be heated. If the temperature of the heated hot water is lower than the hot water temperature for heating and hot water supply, the auxiliary heat source device (boiler 32) is used to warm up to the use temperature, and then the heat recovery ventilator installed indoors using a flow distributor or a flow control valve. The heating coil of the part 54 and the hot water coil of the floor heating apparatus 53 are supplied.

In the cooling operation, the refrigerant flows in the reverse direction of the heating operation by the cooling / heating switching valve 64 included in the heat pump, that is, the four-way valve, and the living sewage and underground heat exchangers 13 and 14 and the heat storage tank 31 The function is also switched. The domestic sewage and underground heat exchangers 13 and 14 serve as condensers to release heat, and the heat storage tank 31 serves as an evaporator to absorb heat. Cold water of the heat storage tank 31 generated by heat exchange with a low temperature and low pressure refrigerant is supplied to the cooling coil of the heat recovery ventilator 54 installed in the indoor space by a flow distributor or a flow control valve.

Ventilation unit 54 for cooling and heating the indoor space, radiant heating and heating unit (ondol heating device 53) can be configured as in the case of Figures 1 and 2, the detailed description thereof will be omitted.

The dual heat source supply system utilizing the living sewage heat and the ground heat according to the present embodiment and the cooling and heating system using the same can be stably supplied with renewable energy heat sources, thereby ensuring the reliability of the system, and use time after the start of heating and cooling operation. As a result, the problem of deterioration caused by this can be improved.

In addition, the air-conditioning and heating system installed in the room allows heating at the same time by heating and radiation by convection by a flow distributor or a flow control valve, and at the heat recovery ventilator unit 54 used for ventilation of the room. By adding a cooling coil, room cooling is also possible.

According to the heat source supply system and the air-conditioning system using the dual heat source of living sewage heat and ground heat according to the present embodiment, the living sewage discarded in the living can be used as an energy source, and the ground water heat is used together with the ground heat. It is possible to improve the thermal recovery power of the ground caused by problems in the heat pump system can improve the utilization efficiency of the system, and to ensure the stability and reliability of the heat source.

In addition, it is possible to improve the thermal comfort of the occupants by shortening the heat response time of the floor heating system, and contribute to energy saving and greenhouse gas reduction of buildings by using a heat pump system having excellent heat efficiency.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a schematic diagram showing a complex air conditioning system according to a first embodiment of the present invention.

2 is a conceptual diagram showing a complex air conditioning system according to a first embodiment of the present invention.

Figure 3 is a schematic diagram showing a cooling and heating system using a dual heat source of domestic sewage heat and ground heat according to a second embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: heat exchanger 11: domestic sewage treatment device

12: domestic sewage treatment tank 13: domestic sewage heat exchanger

14: underground heat exchanger 15: heat pump

16 flow control valve 18 electrothermal exchanger

20: flow rate control unit 21: evaporator

22 condenser 23 switching valve (4-way valve)

24 Compressor 25 Expansion Valve

31: heat storage tank 32: boiler

34: exhaust duct 36: air supply duct

38: cold and hot water coil 40: radiant cooling and heating unit

41: cogeneration generator 42: hot water coil

51: supply header 52: return header

53: Ondol heating device 54: Ventilation unit

61: differential pressure valve 62: gate valve

63: constant flow valve 64: switching valve (3-way valve)

71: circulation pump 122: control unit

Claims (9)

A heat exchanger for supplying a preheated or precooled fluid by utilizing renewable energy; A flow rate control unit which distributes the fluid supplied from the heat exchange unit; A ventilation unit for cooling and heating the interior of the building by convective heat transfer by distributing the fluid by the flow control unit; Radiant cooling and heating unit for cooling and heating the room by radiant heat transfer by distributing the fluid by the flow control unit; And a control unit connected to the flow control unit and configured to adjust a ratio between the amount of the fluid distributed to the ventilator unit and the amount of the fluid distributed to the radiant heating and cooling unit. The method of claim 1, wherein the heat exchange unit, A domestic sewage heat exchanger for preheating or precooling the fluid using heat recovered from domestic sewage as a first heat source; An underground heat exchanger for preheating or precooling the fluid using underground heat as a second heat source; A switching valve for selecting any one of the domestic sewage heat exchanger and the underground heat exchanger so that any one of the first heat source and the second heat source exchanges heat with the fluid; A heat pump for supplying hot water or cold water using the heat exchanger selected by the switching valve as a heat source; And a heat storage tank for storing hot water or cold water supplied from the heat pump and supplying the flow rate control unit. The method of claim 2, The heat exchange unit, a heating and cooling system further comprises a boiler as an auxiliary heat source device for heating the hot water stored in the heat storage tank. The method of claim 3, The heat exchange unit, a combined heating and cooling system further comprises a cogeneration generator for supplying waste heat to any one or more of the heat pump or the boiler. According to claim 1, The ventilator unit, An electrothermal heat exchanger that recovers heat from the exhaust discharged from the indoor to the outdoor and transfers the heat to the air supply introduced from the outdoor to the indoor; An exhaust duct connected to the heat exchanger and serving as a passage for the exhaust; An air supply duct connected to the heat exchanger and serving as a passage of the air supply; It is coupled to the air supply duct, including a cold and hot water coil flowing the fluid therein, The air supply is heated or cooled through heat exchange with the fluid while passing in close proximity to the cold and hot water coil. According to claim 1, wherein the radiant heating unit, Complex heating and heating system, characterized in that it comprises a hot water coil for heating the floor embedded in the floor of the room. A system for providing a heat source supplied to a building's heating and cooling system, A domestic sewage heat exchanger for preheating or precooling a fluid using heat recovered from domestic sewage as a first heat source; An underground heat exchanger for preheating or precooling the fluid using the underground heat as the second heat source; A switching valve for selecting any one of the domestic sewage heat exchanger and the underground heat exchanger so that any one of the first heat source and the second heat source exchanges heat with the fluid; A heat pump for supplying hot water or cold water using the heat exchanger selected by the switching valve as a heat source; And a heat storage tank configured to store hot water or cold water supplied from the heat pump and supply the same to the air conditioning system. The method of claim 7, wherein And a boiler as an auxiliary heat source device for heating hot water stored in the heat storage tank. The method of claim 8, And a cogeneration generator for supplying waste heat to at least one of the heat pump and the boiler.

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