KR20220105521A - Hybrid Cooling System integrated Heat Pump and Thermal Driven Adsorption Chiller - Google Patents

Abstract

An objective of the present invention is to provide a hybrid cooling system capable of reducing energy used in the cooling system. According to the present invention, the hybrid cooling system comprises: a first cooling device which drives a heat pump to produce low-temperature water and high-temperature water; a high-temperature tank for storing the high-temperature water produced in the first cooling device; a low-temperature tank for storing the low-temperature water produced in the first cooling device; and a second cooling device for cooling the low-temperature water stored in the low-temperature tank by desorbing an adsorbent using the high-temperature water stored in the high-temperature tank.

Description

Hybrid Cooling System integrated Heat Pump and Thermal Driven Adsorption Chiller

The present invention relates to a hybrid cooling system. More particularly, the present invention relates to a hybrid cooling system capable of simultaneously using cooling by a heat pump and cooling by an adsorption type air conditioner.

Due to factors such as global warming, the weather around the world is getting hotter. For this reason, the demand for air conditioners and the amount of energy used for the air conditioners are increasing.

In particular, countries with a desert climate in the Middle East, such as the Gulf Cooperation Council (GCC) countries, have a long cooling period that occupies 11 months of the year. In addition, the use of cooling energy occupies a large proportion, accounting for more than 80% of the total building energy use. Therefore, there is an urgent need for measures to reduce energy used in air conditioners in regions such as the countries concerned.

In addition, since the conventional cooling system including a cooling tower discharges heat generated in the cooling system to the outside air through the cooling tower, when the outside air temperature is high, heat exchange between the cooling water of the cooling tower and the outside air is difficult or the heat exchange efficiency may be reduced. . Therefore, there is a problem that heat exchange between the cooling water of the cooling tower and the outside air may be difficult or the heat exchange efficiency may be lowered when a conventional cooling system including a cooling tower is used in regions such as countries where the outdoor temperature in summer is 50 ° C or higher. .

Korean Patent Registration 10-1583603

An object of the present invention is to provide a hybrid cooling system capable of reducing energy used in the cooling system. In particular, it is intended to use low-temperature water cooled by a heat pump and an adsorption-type air conditioner for cooling. And, it is intended to drive the adsorption-type air conditioner by using the high-temperature water heated by the heat pump as a driving heat source. Accordingly, it is intended to improve energy efficiency by using the waste heat of the heat pump as a driving heat source for the adsorption type air conditioner without discarding it.

Another object of the present invention is to provide a hybrid cooling system capable of solving problems in which heat exchange between cooling water and outdoor air in a cooling tower is difficult or heat exchange efficiency may be lowered in a cooling system in a high outdoor temperature environment. In particular, in the cooling system, high-temperature water heated according to the operation of the heat pump is used as the driving heat source of the adsorption type air conditioner, and the heat discharged from the adsorption type air conditioner is transferred to the ground, which is relatively lower than the outdoor temperature, through the underground heat exchanger replacing the cooling tower. It is to provide a hybrid cooling system capable of improving heat exchange efficiency by discharging.

However, the problems to be solved by the present invention are not limited to the above problems, and may be variously expanded within the scope without departing from the spirit and scope of the present invention.

In order to achieve the above object of the present invention, a hybrid cooling system according to exemplary embodiments includes a first cooling device for producing low-temperature water and high-temperature water by driving a heat pump, and a high temperature produced by the first cooling device. A high-temperature tank for storing water, a low-temperature tank for storing the low-temperature water produced by the first cooling device, and a method for cooling the low-temperature water stored in the low-temperature tank by desorbing an adsorbent using the high-temperature water stored in the high-temperature tank Includes 2 cooling devices.

In addition, the second cooling device may further include a heat exchanger for supplying water so that the adsorption of the adsorbent is performed.

In addition, the heat exchanger includes a borehole drilled underground, and a circulation pipe extending from the ground into the borehole in a U shape to provide a passage for water circulation, and the water flowing into the circulation pipe heats underground. It can be cooled by dissipating.

In addition, the circulation pipe may be buried underground to a depth of 30 m or more and 200 m or less from the ground surface.

In addition, the first cooling device includes a third compressor, a third condenser, a third expansion valve, and a third evaporator, and a first heat pump for producing low-temperature water from the third evaporator, and a fourth compressor, a second a fourth condenser, a fourth expansion valve, and a fourth evaporator, and a second heat pump for producing high-temperature water in the fourth condenser, wherein the first heat pump and the second heat pump are connected in series, the Thermal energy released to the third condenser may be supplied to the fourth evaporator.

In addition, the third refrigerant circulating in the first heat pump and the fourth refrigerant circulating in the second heat pump may be of different types.

In addition, the second cooling device includes a first adsorption tank and a second adsorption tank for storing the adsorbent therein, respectively, and a second evaporator for cooling the low-temperature water introduced from the low-temperature tank, wherein the first and The high-temperature water supplied from the high-temperature tank and the water supplied from the heat exchanger may be alternately supplied to each of the second adsorption tanks.

In addition, the adsorbent may include at least one of silica gel and zeolite.

In addition, the hybrid cooling system may further include an air conditioner for cooling or heating a room by selectively exchanging heat with the low-temperature water stored in the low-temperature tank or the high-temperature water stored in the high-temperature tank.

In addition, the hybrid cooling system may further include a solar heat collector for collecting solar heat to heat the high temperature water stored in the high temperature tank.

The hybrid cooling system according to the exemplary embodiments of the present invention improves the thermal efficiency of the heat pump by using it as a driving heat source for the adsorption type air conditioner instead of discharging the heat generated when the refrigerant condenses in the heat pump to the outside air or the ground. can

In addition, cooling efficiency can be improved by performing cooling with low-temperature water cooled by a heat pump and an adsorption type air conditioner.

In addition, in regions where the efficiency of the cooling tower is rapidly lowered due to the temperature of the outside air being over 50℃, such as desert-type climate regions in the Middle East, the generated heat is used as a driving heat source for the adsorption type air conditioner instead of the cooling tower. It can solve the problem of reduced efficiency.

In addition, the heat discharged from the heat pump is used by heating high-temperature water, and the heat discharged from the adsorption type air conditioner is dissipated underground through the underground heat exchanger, so that the cooling system can be driven without using a cooling tower.

In addition, by connecting two heat pumps in series and using refrigerants of different properties for each heat pump, high temperature water required for driving the adsorption type air conditioner can be produced.

In addition, by using the heat discharged from the heat pump and the heat collected from the solar heat collector to heat the high-temperature water stored in the high-temperature tank, it is possible to sufficiently supply high-temperature water, which is a driving heat source required for the adsorption-type air conditioner. .

In addition, by using the heat discharged from the heat pump and the heat collected from the solar heat collector to be complementary to heat the water in the high-temperature tank, the high-temperature water required for desorption of the adsorbent can be sufficiently supplied to the adsorption-type air conditioner.

1 is a block diagram illustrating a hybrid cooling system according to an embodiment of the present invention.
FIG. 2 is a diagram schematically illustrating an embodiment of the first cooling device of FIG. 1 .
FIG. 3 is a diagram schematically illustrating the second cooling device of FIG. 1 .
FIG. 4 is a flowchart for explaining a process in which a second refrigeration cycle is driven in the second cooling device of FIG. 3 .
FIG. 5 is a view schematically showing the heat exchanger of FIG. 1 .
6 is a diagram schematically illustrating another embodiment of the first cooling device of FIG. 1 .
7 is a flowchart illustrating a process of producing low-temperature water and high-temperature water in the first cooling device of FIG. 6 .
8 is a block diagram illustrating a hybrid cooling system according to another embodiment of the present invention.

With respect to the embodiments of the present invention disclosed in the text, specific structural or functional descriptions are only exemplified for the purpose of describing the embodiments of the present invention, and the embodiments of the present invention may be embodied in various forms. It should not be construed as being limited to the embodiments described in .

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle. Other expressions describing the relationship between elements, such as "between" and "neighboring to" and "directly adjacent to", should be interpreted similarly.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, and is intended to indicate that one or more other features or numbers are present. It is to be understood that it does not preclude in advance the possibility of the presence or addition of step operations, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as meanings consistent with the context of the related art, and unless explicitly defined in the present application, they are not to be interpreted in an ideal or excessively formal meaning. .

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

The present invention relates to a hybrid cooling system (10) for double cooling water in a low temperature tank (200) by combining two cooling devices.

1 is a block diagram illustrating a hybrid cooling system according to an embodiment of the present invention. FIG. 2 is a diagram schematically illustrating an embodiment of the first cooling device of FIG. 1 . FIG. 3 is a diagram schematically showing the second cooling device of FIG. 1 , and FIG. 4 is a flowchart for explaining a process in which the second refrigerating cycle is driven in the second cooling device of FIG. 3 . FIG. 5 is a view schematically showing the heat exchanger of FIG. 1 .

1 to 5 , the hybrid cooling system 10 includes a first cooling device 100 for producing low-temperature and high-temperature water, a high-temperature tank 300 for storing the produced high-temperature water, and the produced low-temperature water. A low-temperature tank 200 for storing, a second cooling device 400 for cooling the low-temperature water stored in the low-temperature tank 200 by desorbing an adsorbent using the produced high-temperature water, a low-temperature tank 200 for storing low-temperature water; It is selectively connected to the high-temperature tank 300 for storing high-temperature water to supply low-temperature water required for adsorption of the adsorbent to the air conditioner 500 for cooling or heating the room, and the second cooling device 400. It includes a heat exchanger (600).

Here, the first cooling device 100 is a heat pump that heats or cools the incoming water using an exothermic reaction or endothermic reaction of the refrigerant, and the second cooling device 400 performs a cooling action using an adsorption reaction and a desorption reaction of an adsorbent. It may be an adsorption-type air conditioner that performs

The first cooling device 100 drives a heat pump to produce low-temperature water and high-temperature water.

At this time, the low-temperature water and the high-temperature water are relative concepts. The low-temperature water is water produced through a refrigeration cycle in the first cooling device 100 and stored in the low-temperature tank 200 , and the high-temperature water is the first cooling device 100 . ) is water produced through a refrigeration cycle and stored in the high-temperature tank 300 . In this case, the low-temperature water means water having a temperature of T1 and a temperature lower than that of the high-temperature water, and the high-temperature water is water having a temperature of T3 and water having a higher temperature than the low-temperature water. For example, T1 may be 4°C to 10°C and T3 may be 77°C to 83°C.

The first cooling device 100 may cause a phase change of the refrigerant while performing a refrigeration cycle, and may cool or heat water in this process.

Specifically, as shown in FIG. 2 , the first cooling device 100 includes a first compressor 101 , a first condenser 103 , a first expansion valve 105 , a first evaporator 107 , and a first It may contain a refrigerant.

In the first cooling device 100 , the first refrigerant circulates through the first compressor 101 , the first condenser 103 , the first expansion valve 105 and the first evaporator 107 , and cools water through heat exchange or A first refrigeration cycle of heating may be performed.

Here, the first refrigeration cycle may refer to a circulating process of the first refrigerant in which a cooling action occurs by the circulation of the first refrigerant in the first cooling device 100 .

The first refrigerant is a working fluid of the first refrigeration cycle. In the first evaporator 107 , the first refrigerant may absorb ambient heat while vaporizing from liquid to gas. In this process, the water supplied from the low-temperature tank 200 may be cooled. In the first condenser 103 , heat may be radiated to the surroundings while the first refrigerant is liquefied from gas to liquid. In this process, the water supplied from the high-temperature tank 300 may be heated. Therefore, in the first refrigeration cycle as a whole, heat is absorbed from the low-temperature material and discharged as the high-temperature material.

For example, the first refrigeration cycle may be as follows.

First, the temperature of the gaseous first refrigerant is increased while being compressed in the first compressor 101 . Next, as the first refrigerant is condensed in the first condenser 103 , heat is discharged to water having a relatively lower temperature than the first refrigerant, and at this time, the water is heated. Next, the temperature of the first refrigerant decreases while being expanded and reduced in the first expansion valve 105 . Next, the first refrigerant absorbs heat of relatively high temperature water while being vaporized in the first evaporator 107 , and at this time, the water is cooled.

In the first refrigeration cycle, the high-temperature water heated by the first condenser may be stored in the high-temperature tank 300 , and the low-temperature water cooled by the first evaporator may be stored in the low-temperature tank 200 .

The high-temperature tank 300 stores the high-temperature water produced by the first cooling device 100 . Specifically, the high-temperature tank 300 may supply water having a temperature of T4 to the first cooling device 100 , and may receive water heated to a temperature of T3 from the first cooling device 100 . In this case, the T4 temperature may be lower than the T3 temperature. For example, T4 may be 67°C to 73°C.

For example, the high temperature tank 300 may supply water having a temperature of T4 to the first condenser 103 or the fourth condenser 133 of the first cooling device 100 . The water having a temperature of T4 supplied to the first condenser 103 or the fourth condenser 133 may be heated to water having a temperature of T3 by heat discharged while condensing the refrigerant, and then supplied to the high-temperature tank 300 . That is, the temperature of the high-temperature water produced by the first cooling device 100 may be the T3 temperature.

The low-temperature tank 200 stores the low-temperature water produced by the first cooling device 100 . Specifically, the low-temperature tank 200 may supply water having a temperature of T2 to the first cooling device 100 , and may receive water cooled to a temperature of T1 from the first cooling device 100 . In this case, the T2 temperature may be higher than the T1 temperature. For example, T2 may be 15°C to 21°C.

For example, the low temperature tank 200 may supply water having a temperature of T2 to the first evaporator 107 or the third evaporator 117 of the first cooling device 100 . The water having a temperature of T2 supplied to the first evaporator 107 or the third evaporator 117 may absorb heat while the refrigerant is vaporized, be cooled with water having a temperature of T1, and then be supplied to the low-temperature tank 200 . That is, the temperature of the low-temperature water produced by the first cooling device 100 may be T1.

As described above, the water in the low-temperature tank 200 required to cool the room may be cooled by using the first cooling device 100 . However, in the present invention, the low-temperature water in the low-temperature tank 200 is used as a driving heat source for the second cooling device 400 rather than discarding the heat generated in the first cooling device 100 as waste heat using the cooling tower. is cooled together with the first cooling device 100 . Through this, it is possible to save energy and increase the cooling efficiency of the cooling system. Accordingly, the present invention is called a hybrid cooling system (10).

In addition, in a region where it is difficult to use a cooling tower due to high outside air temperature, such as in a desert-type climate region in the Middle East, the waste heat generated by the first cooling device 100 is radiated to heat the high temperature water, so that the cooling system can be operated without a cooling tower. can run smoothly.

The second cooling device 400 is an adsorption type air conditioner, and may use heat generated from the first cooling device 100 to heat the high-temperature water in the storage tank, and use the high-temperature water as a driving heat source.

The adsorption type air conditioner is a cooling heat engine that uses the exothermic (adsorption) and endothermic (desorption) phenomena according to the reversible reaction of the adsorbent and the refrigerant. It may be an environmentally friendly cooling system using water as the furnace.

As shown in FIG. 3 , the second cooling device 400 performs a second refrigeration cycle, and cools the second refrigerant circulating in the second refrigeration cycle and low-temperature water introduced from the low-temperature tank 200 . Evaporator 411, first and second adsorption tanks 413,415, first or second adsorption tanks for adsorbing or desorbing the adsorbent stored therein with respect to the second refrigerant flowing in from the second evaporator 411 The high-temperature water supplied from the high-temperature tank 300 to the third condenser 417, the first and second adsorption tanks 413,415, and the heat exchanger ( It may include first and second valves 419 and 421 controlling the water supplied from 600 to be alternately supplied, and third to sixth valves 423,425, 427 and 229 controlling the flow of the second refrigerant.

Here, the second refrigerating cycle may refer to a refrigerant circulation process in which a cooling action occurs by circulation of the second refrigerant in the second cooling device 400 .

A process in which the second refrigeration cycle is driven in the second cooling device 400 is illustrated in FIG. 4 .

As shown in FIG. 4 , first, in the second evaporator 411 , the water of the temperature T8 introduced from the low-temperature tank 200 is cooled to the water of the T7 temperature by the vaporization of the second refrigerant, and then into the low-temperature tank 200 . The discharged and vaporized second refrigerant flows into the first adsorption tank 413 (S100).

In this case, the T8 temperature may be higher than the T7 temperature. For example, T8 may be 15°C to 21°C, and T7 may be 8°C to 14°C.

At this time, since the fourth valve 425 is closed and the third valve 423 is opened, the refrigerant flows into the first adsorption tank 413 .

Next, in the first adsorption tank 413 , water of a temperature of T12 is supplied from the heat exchanger 600 to adsorb (exotherm) of the adsorbent, and in the second adsorption tank 415 , a temperature of T5 from the high temperature tank 300 . of water is supplied to perform desorption (endothermic) of the adsorbent (S110).

In this case, the T12 temperature may be lower than the T5 temperature. For example, T12 may be 27°C to 33°C, and T5 may be 77°C to 83°C.

At this time, the water having a temperature of T12 supplied from the heat exchanger 600 passes through the first adsorption tank 413 and is heated to water of a temperature T11 by adsorption (exothermic) of the adsorbent and discharged to the outside of the first adsorption tank 413 . The T5 temperature water supplied from the high temperature tank 300 passes through the second adsorption tank 415 and is cooled to T6 temperature water by the desorption (endothermic) of the adsorbent and discharged to the outside of the second adsorption tank 415. It is supplied to the high temperature tank (300).

In this case, the T12 temperature may be lower than the T11 temperature, and the T5 temperature may be higher than the T6 temperature. For example, T11 may be 37°C to 43°C, and T6 may be 67°C to 73°C.

Next, in the second adsorption tank 415 , the second refrigerant desorbed by desorption (heat absorption) of the adsorbent passes through the opened 6-valve 429 and flows into the second condenser 417 to be condensed, and then to the outside is emitted as The discharged second refrigerant may be introduced into the second evaporator 411 and reused (S120).

At this time, the water of the temperature T11 heated while passing through the first adsorption tank 413 passes through the third condenser 417 and is supplied to the heat exchanger 600 .

Next, in the second evaporator 411 , the water having a temperature of T8 introduced from the low-temperature tank 200 is cooled with water having a temperature of T7 by the vaporization of the second refrigerant, and discharged to the low-temperature tank 200 , and the second vaporized second The refrigerant flows into the second adsorption tank 415 (S130).

At this time, since the third valve 423 is closed and the fourth valve 425 is opened, the refrigerant flows into the second adsorption tank 415 .

Next, in the second adsorption tank 415 , water at a temperature of T12 is supplied from the heat exchanger 600 to adsorb (exotherm) of the adsorbent, and in the first adsorption tank 413 , a temperature of T5 from the high temperature tank 300 . of water is supplied to perform desorption (endothermic) of the adsorbent (S140).

At this time, the water of temperature T12 supplied from the heat exchanger 600 passes through the second adsorption tank 415 and is heated to water of temperature T11 by adsorption (exothermic) of the adsorbent and discharged to the outside of the second adsorption tank 415 . The T5 temperature water supplied from the high temperature tank 300 passes through the first adsorption tank 413 and is cooled to T6 temperature water by the desorption (endothermic) of the adsorbent and discharged to the outside of the first adsorption tank 413. It is supplied to the high temperature tank (300).

Next, in the first adsorption tank 413 , the second refrigerant desorbed by desorption (heat absorption) of the adsorbent passes through the opened 5 valve 427 and flows into the second condenser 417 to be condensed, and then to the outside is emitted as The discharged second refrigerant may be introduced into the second evaporator 411 and reused (S150).

At this time, the water having a temperature of T11 that is heated while passing through the second adsorption tank 415 passes through the third condenser 417 and is supplied to the heat exchanger 600 .

Thereafter, the above-described processes ( S100 to S150 ) may be sequentially repeated.

The first and second valves 419 and 421 may control the high temperature water supplied from the high temperature tank 300 and the water supplied from the heat exchanger 600 to be alternately supplied to the first and second adsorption tanks 413,415. have.

The adsorbent used in the second cooling device 400 may include at least one of silica gel and zeolite as a component, and in this case, the second refrigerant may be water.

In addition, the adsorbent may be a metal-organic framework (MOF) having excellent low-temperature regeneration capability. The metal-organic structure is a porous coordination polymer compound and has a crystalline skeleton, and a cluster of metal ions and an organic ligand molecule are coordinated to form a skeleton. The metal-organic structure has a high water adsorption capacity as its specific surface area is 3 to 5 times higher than that of silica gel and zeolite. In addition, it is possible to selectively adsorb moisture and easily desorb at a low temperature by simultaneously retaining a hydrophilic portion and a hydrophobic portion in the skeleton. That is, the desorption efficiency is higher than that of silica gel or zeolite whose efficiency is lowered at a low desorption temperature. There are numerous types of the metal-organic structure according to the types of metal ions and organic ligands. For example, the metal-organic structure may be an aluminum fumarate (Alfum or Al-F) metal-organic structure.

As described above, the second cooling device 400 cools the low-temperature water stored in the low-temperature tank 200 by desorbing the adsorbent using the high-temperature water stored in the high-temperature tank 300 . For example, the first cooling device 100 produces water having a temperature of T3 and stores it in the high-temperature tank 300, and the high-temperature tank 300 supplies water having a temperature of T5 to the second cooling device 400, The second cooling device 400 may cool the water of the T8 temperature supplied from the low temperature tank 200 with the water of the T7 temperature by desorbing the adsorbent with the supplied water of the T5 temperature. In this case, the T3 temperature may be the same as the T5 temperature.

That is, in the hybrid cooling system 10 according to an embodiment of the present invention, instead of discharging heat generated when the refrigerant is condensed in the first cooling device 100 including a heat pump to outside air or the ground, the heat is used in the high-temperature tank The hot water of 300 is heated. In addition, by using the heated high-temperature water as a driving heat source for the second cooling device 400 that is an adsorption-type air conditioner, the efficiency of the heat pump can be increased compared to the related art.

In addition, the hybrid cooling system 10 according to an embodiment of the present invention primarily drives the first cooling device 100 to produce low-temperature water, and the high-temperature water produced through the first cooling device 100 . By driving the second cooling device 400 using the to produce low-temperature water once, cooling efficiency can be improved.

In addition, in the heat pump cooling system 10, heat generated by the condensation reaction of the refrigerant must be dissipated. In the conventional case, the heat is dissipated to the outside air by heat transfer using a cooling tower. In this case, the temperature of the outside air must be low in order to transfer the heat inside the heat pump cooling system to the outside. However, in regions with a desert climate in the Middle East, it is difficult to dissipate heat to the outside air using a cooling tower as in the prior art because the outdoor air temperature in summer is higher than 50° C., so the efficiency of the heat pump cooling system is lowered. On the other hand, in the hybrid cooling system 10 according to an embodiment of the present invention, internal heat is used to heat the high temperature water in the high temperature tank 300 . Therefore, it is possible to process internal heat without installing a separate cooling tower, thereby solving the problem of lowering the efficiency of the heat pump cooling system caused by the cooling tower in a high-temperature outdoor air situation.

In order to operate the second cooling device 400, high-temperature water for the desorption reaction of the adsorbent and low-temperature water for the adsorption reaction are required. The high-temperature water may be heated through the first cooling device 100 and supplied by the high-temperature tank 300 as described above. In addition, the low-temperature water may be supplied through the heat exchanger 600 that is cooled in the ground and heat exchanged. That is, the low-temperature water whose temperature is lowered by the low temperature in the ground through the heat exchanger 600 may be supplied as low-temperature water for the adsorption reaction of the second cooling device 400 .

The heat exchanger 600 may supply water having a temperature within the adsorbable temperature of the adsorbent in the second cooling device 400 to the second cooling device 400 so that the adsorption of the adsorbent is performed in the second cooling device 400 . have.

For example, the heat exchanger 600 may supply water of T12 to the second cooling device 400 , and in this case, the temperature T12 of the water supplied from the heat exchanger 600 is adsorption in the second cooling device 400 . It may be the adsorbable temperature of the adsorbent to perform.

In this case, the adsorbable temperature of the adsorbent may be a temperature at which the adsorbent stored in the first or second adsorption tanks 413,415 of the second cooling device 400 can generate heat (adsorb).

The heat exchanger 600 may be an underground heat exchanger.

The underground heat exchanger may be to supply water cooled by a low temperature underground to a cooling device on the ground through a circulation pipe, and to flow water heated by the cooling device into a circulation pipe in the ground through the circulation pipe. In this case, the water inside the underground circulation pipe can be cooled by dissipating the heat it has into the underground.

An example of a heat exchanger 600 is shown in FIG. 5 .

As shown in FIG. 5 , the heat exchanger 600 may include a borehole 610 drilled underground, and a circulation pipe 630 extending into the borehole 610 to provide a passage through which water circulates.

The circulation pipe 630 may be buried in the ground to the same depth as the borehole 610 from the ground surface (G).

Specifically, the borehole 610 may be drilled to a depth at which the temperature of the underground can be maintained constant regardless of the external temperature so that the water flowing into the circulation pipe 630 can be cooled. For example, the borehole 610 may be drilled to a depth of 30m to 200m from the ground surface G so that the underground temperature can be maintained at 10°C to 20°C.

The circulation pipe 630 extends from the ground surface G into the borehole 310 in a U-shape, and may include a passage through which water circulates and can be cooled. At this time, the circulation pipe 630 may be buried underground to a depth that can maintain the underground temperature of 10 ℃ ~ 20 ℃. For example, the depth at which the circulation pipe 630 is buried may be 30m ~ 200m depth from the ground surface (G).

In one embodiment, the circulation pipe 630 may be made of a material of high-density polyethylene pipes, and the circulation pipe 630 inside the borehole 610 may be buried by the filler 350 . . In this case, the filler 350 may include at least one of discarded concrete, soil cement, and bentonite.

Alternatively, the circulation pipe 630 may be made of a material such as a steel pipe, and as the filler 350, gravel, sand, etc. or the same component as the underground component of the drilled position may be used.

The temperature of water flowing from the second cooling device 400 to the heat exchanger 600 through the circulation pipe 630 is a temperature T11, and the temperature of water supplied from the heat exchanger 600 to the second cooling device 400 is T12. It can be temperature.

For example, the temperature of water flowing into the heat exchanger 600 through the third condenser 417 of the second cooling device 400 is T11, and the temperature of the second cooling device 400 from the heat exchanger 600 is T11. The temperature of the water supplied to the first or second adsorption tanks 413,415 may be T12.

As described above, the second cooling device 400 of the present invention uses the high-temperature water of the high-temperature tank 300 produced by utilizing the waste heat of the first cooling device 100 as a driving heat source for desorption of the adsorbent, and the adsorbent By using the underground cooling water supplied through the heat exchanger 600 for adsorption of the heat exchanger, it is possible to save energy and provide an eco-friendly cooling system.

The air conditioner 500 cools the room by using the low temperature water stored in the low temperature tank 200 .

For example, the air conditioner 500 may cool the room through the following process.

First, the low temperature tank 200 supplies the stored water to the first cooling device 100 and the second cooling device 400 , with water having a temperature of T2 and water having a temperature of T8 .

Next, the first cooling device 100 cools the water of the T2 temperature supplied from the low temperature tank 200 with the water of the T1 temperature and supplies it to the low temperature tank 200 . Also, the second cooling device 400 cools the supplied water having a temperature of T8 with water having a temperature of T7 and supplies it to the low temperature tank 200 .

Next, the low-temperature tank 200 supplies the supplied water of the temperature T1 and the water of the temperature T7 to the air conditioner 500 with the water of the temperature T9. In this case, the relationship between the T1 temperature, the T7 temperature, and the T9 temperature may be T1≤T9≤T7. For example, T9 may be 4°C to 14°C.

Next, the air conditioner 500 cools the room using the supplied water having a temperature of T9.

Next, the air conditioner 500 discharges water having a temperature of T10 heated while performing cooling to the low temperature tank 200 . In this case, the T10 temperature may be higher than the T9 temperature. For example, T10 may be 15°C to 21°C.

Thereafter, water is supplied from the low-temperature tank 200 to the first cooling device 100 and the second cooling device 400 again. In this case, the T10 temperature may be the same as the T2 temperature and the T8 temperature.

In one embodiment, the air conditioner 500 includes an air handling unit or a fan coil unit, and through this, cooling is performed using the low temperature water stored in the low temperature tank 200 . can do.

The air conditioner 500 may cool or heat a room by selectively exchanging heat with the low-temperature water stored in the low-temperature tank 200 or the high-temperature water stored in the high-temperature tank 300 .

A water supply device (not shown) may be connected together with the air conditioner 500 , or a water supply device may be connected in place of the air conditioner 500 . In this case, the water supply device may selectively connect the low-temperature tank 200 and the high-temperature tank 300 to supply cold water or hot water.

As described above, by selectively connecting the air conditioner 500 and the water supply device to the low temperature tank 200 and the high temperature tank 300 of the present invention, a multifunctional system capable of selectively supplying heating and cooling and hot and cold water can be implemented.

As described above, the hybrid cooling system 10 according to an embodiment of the present invention uses the waste heat generated by the first cooling device 100 while producing low-temperature water for cooling in the first cooling device 100 . to produce high-temperature water and use it as a driving heat source for the second cooling device 400 , and using this, the second cooling device 400 can produce low-temperature water for cooling together. In this way, the cooling efficiency of the cooling system can be increased. In addition, since the waste heat generated in the first cooling device 100 is used to heat the high temperature water, there is no need to provide a cooling tower, so that the problem of efficiency decrease due to the cooling tower in a high temperature area can be solved.

Additionally, if the first cooling device 100 is configured with a plurality of heat pumps, cooling efficiency may be further improved. Another exemplary embodiment of the present invention is disclosed in FIGS. 6 and 7 .

6 is a view schematically showing another embodiment of the first cooling device of FIG. 1 , and FIG. 7 is a flowchart for explaining a process of producing low-temperature water and high-temperature water in the first cooling device of FIG. 6 .

The hybrid cooling system 10 according to another embodiment of the present invention described above is shown in FIGS. 1 to , except that the first cooling device includes the first heat pump 110 and the second heat pump 130 . It is the same as or similar to the hybrid cooling system 10 according to an embodiment of the present invention described with reference to 5 . Therefore, only the differences as described above will be described below, and descriptions of the same components will be omitted.

Referring to FIG. 6 , the first cooling device 100 may include a first heat pump 110 driving a third refrigeration cycle and a second heat pump 130 driving a fourth refrigeration cycle.

Here, the third refrigeration cycle refers to a circulating process of a refrigerant in which a cooling action occurs by refrigerant circulation in the first heat pump 110 , and the fourth refrigeration cycle refers to a refrigerant circulation in the second heat pump 130 . It may refer to a circulating process of the refrigerant in which the cooling action occurs.

When one heat pump is used, cooling efficiency may be low in simultaneously producing low-temperature water having a temperature of T1 and high-temperature water having a temperature of T3. Therefore, by providing a plurality of heat pumps and connecting them in series, cooling efficiency can be further improved in producing low-temperature water having a temperature of T1 and high-temperature water having a temperature of T3.

For example, when using a heat pump having one refrigeration cycle, low-temperature water of 4°C to 10°C and medium hot water of 45°C to 55°C are produced, but by connecting two refrigeration cycles in series, 4°C to By producing low-temperature water of 10℃ and high-temperature water of 77℃~83℃, it is possible to secure high-temperature water suitable for the desorption reaction of adsorption-type air conditioners.

Here, the method of connecting the two refrigeration cycles in series may be a method of connecting the two refrigeration cycles in a tandem method. The tandem method is an improvement on the existing parallel operation method in which heat pumps were operated individually by connecting two or more heat pumps. Therefore, the increased cost is similar, but the performance can be improved.

The first heat pump 110 drives the third refrigeration cycle through the third compressor 111, the third condenser 113, the third expansion valve 115, the third evaporator 117 and the third refrigerant, The second heat pump 130 may drive the fourth refrigeration cycle through the fourth compressor 131 , the fourth condenser 133 , the fourth expansion valve 135 , the fourth evaporator 137 , and the fourth refrigerant. have. Since the third and fourth refrigeration cycles are basically the same as or similar to the first refrigeration cycle, duplicate descriptions will be omitted as described above, and only differences will be described.

The third refrigeration cycle of the first heat pump 110 and the fourth refrigeration cycle of the second heat pump 130 are connected in series with each other, and the thermal energy q emitted from the first heat pump 110 is the second heat It may be supplied to the pump 130 .

Specifically, thermal energy emitted from the third condenser 113 of the first heat pump 110 may be supplied to the fourth evaporator 137 of the second heat pump 130 .

In this case, the third evaporator 117 of the first heat pump 110 may produce low-temperature water having a temperature of T1 and supply it to the low-temperature tank 200 , and the fourth condenser 133 of the second heat pump 130 . can produce high-temperature water having a temperature of T3 and supply it to the high-temperature tank 300 .

7 illustrates a process in which the first heat pump 110 and the second heat pump 130 are driven in the first cooling device 100 to produce low-temperature water and high-temperature water.

As shown in FIG. 7 , first, while the third refrigerant is vaporized in the third evaporator 117 , the low-temperature water of the T2 temperature introduced into the third evaporator 117 from the low-temperature tank 200 is converted to the low-temperature water of the T1 temperature. and then supplied to the low-temperature tank 200 (S200).

In this case, the T2 temperature may be higher than the T1 temperature. For example, T2 may be 15°C to 21°C.

Next, the temperature of the third refrigerant is increased while being compressed in the third compressor 111 ( S210 ).

Next, the third refrigerant is condensed in the third condenser 113 to discharge heat. As the fourth refrigerant is vaporized in the fourth evaporator 137, it absorbs heat discharged from the third condenser (S220).

Next, the temperature of the fourth refrigerant is increased while being compressed by the fourth compressor 131 ( S230 ).

Next, while the fourth refrigerant is condensed in the fourth condenser 133, the high-temperature water of T4 temperature introduced into the fourth condenser 133 from the high-temperature tank 300 is heated with the high-temperature water of the T3 temperature, and the high-temperature tank ( 300) (S240).

In this case, the T4 temperature may be lower than the T3 temperature. For example, T4 may be 67°C to 73°C.

Next, the temperature of the fourth refrigerant is decreased while being expanded and reduced in the fourth expansion valve 135 ( S250 ).

Next, the fourth refrigerant absorbs heat while being vaporized in the fourth evaporator 137 . As the third refrigerant is condensed in the third condenser 113 , heat is applied to the fourth evaporator 137 ( S260 ).

Next, the temperature of the third refrigerant is decreased while being expanded and reduced in the third expansion valve 115 ( S270 ).

Thereafter, the above-described processes ( S200 to S270 ) are sequentially repeated, and the first cooling device 100 may produce low-temperature water and high-temperature water.

As described above, by connecting the first heat pump 110 and the second heat pump 130 in series in the first cooling device 100 , the first cooling device 100 is the first heat pump 110 . The third refrigeration cycle and the fourth refrigeration cycle of the second heat pump 130 may be connected to each other.

Meanwhile, the third refrigerant circulating in the first heat pump 110 and the fourth refrigerant circulating in the second heat pump 130 may be different types.

Specifically, the third refrigerant circulates in the refrigeration cycle in a relatively lower temperature range than that of the fourth refrigerant. Therefore, by using the refrigerant optimized for each temperature range, the efficiency of each refrigeration cycle can be improved, and as a result, the cooling efficiency of the first cooling device 200 can be maximized.

The third refrigerant has a low evaporation temperature and is a refrigerant that evaporates well while producing low-temperature water in a low-temperature environment, and the fourth refrigerant has a high condensing temperature, and has a property of condensing well while producing high-temperature water in a high-temperature environment. The eggplant may be a refrigerant.

For example, the third refrigerant may be R-410A, and the fourth refrigerant may be R-134A. R-410A has a very low evaporation temperature, so it vaporizes well even at low temperatures.

As described above, in the first cooling device according to another embodiment of the present invention, the first heat pump 110 and the second heat pump 130 are connected in series in the first cooling device 100 , and each By using the refrigerant optimized for the temperature range, the efficiency of each refrigeration cycle is improved, and as a result, the cooling efficiency of the first cooling device 200 can be maximized.

On the other hand, by adding and configuring the solar heat collecting device 700 , the high temperature water required for the second cooling device 400 can be produced to assist the first cooling device 100 or to complement the first cooling device 100 . can Through this, the energy efficiency of the hybrid cooling system 10 may be further improved. Another embodiment of the present invention is disclosed in FIG.

8 is a block diagram illustrating a hybrid cooling system according to another embodiment of the present invention.

The hybrid cooling system 10 shown in FIG. 8 is the same as or similar to the hybrid cooling system 10 described with reference to FIGS. 1 to 7 , except that it further includes a solar heat collector 700 . Accordingly, only the differences as described above will be described, and descriptions of the same components will be omitted.

The solar heat collecting device 700 may collect solar heat to heat the high temperature water stored in the high temperature tank 300 .

High-temperature water for using the driving heat source of the second cooling device 400 may be produced through the first cooling device 100 .

The solar heat collecting device 700 may receive water of a temperature T14 supplied from the high-temperature tank 300 , heat it with the collected solar heat, and then supply water of a temperature T13 to the high-temperature tank 300 . In this case, the T14 temperature may be lower than the T13 temperature. For example, T14 may be 67°C to 73°C, and T13 may be 77°C to 83°C.

Specifically, first, the solar heat collecting device 700 may collect solar heat to heat water stored in the high temperature tank 300 . For example, the solar heat collecting device 700 may increase the temperature of the water stored in the high-temperature tank from T14 to T13.

Next, the second cooling device 400 receives the water of the T5 temperature from the high-temperature tank 300 and desorbs the adsorbent, so that the water of the T8 temperature supplied from the low-temperature tank 200 can be cooled with the water of the T7 temperature. . In this case, the T13 temperature may be the same as the T5 temperature.

For example, water at a temperature of T13 supplied from the solar heat collecting device 700 and stored in the high-temperature tank 300 may be desorbed (endothermic) from the adsorbent in the second cooling device 400, so that the first adsorption tank or the second adsorption tank 2 The adsorption tank 413,415 may be supplied with water having a temperature of T5. In addition, the water having a temperature of T3 supplied to the second cooling device 400 may be cooled by desorption (endotherm) of the adsorbent, and then water of T7 may be supplied to the high-temperature tank 300 .

As described above, by producing and supplying high-temperature water stored in the high-temperature tank 200 by complementing each other by the heat collection of the solar heat collector 700 and the waste heat of the first cooling device 100, the energy of the hybrid cooling system 10 Efficiency can be further improved.

Although the above has been described with reference to embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that you can.

10: hybrid cooling system 100: first cooling device
101: first compressor 103: first condenser
105: first expansion valve 107: first evaporator
110: first heat pump 111: third compressor
113: third condenser 115: third expansion valve
117: third evaporator 130: second heat pump
131: fourth compressor 133: fourth condenser
135: fourth expansion valve 137: fourth evaporator
200: low-temperature tank 300: high-temperature tank
400: second cooling device 411: second evaporator
413: first adsorption tank 415: second adsorption tank
417: second condenser 419: first valve
421: second valve 423: third valve
425: fourth valve 427: fifth valve
429: sixth valve 500: air conditioner
600: heat exchanger 610: borehole
630: circulation pipe 350: filling material
700: solar collector

Claims (10)

a first cooling device for driving a heat pump to produce low-temperature water and high-temperature water;
a high-temperature tank for storing the high-temperature water produced by the first cooling device;
a low-temperature tank for storing the low-temperature water produced by the first cooling device; and
and a second cooling device for cooling the low-temperature water stored in the low-temperature tank by desorbing an adsorbent using the high-temperature water stored in the high-temperature tank. According to claim 1,
The hybrid cooling system according to claim 1, further comprising a heat exchanger for supplying water so that the adsorption of the adsorbent is performed in the second cooling device. 3. The method of claim 2,
the heat exchanger,
boreholes drilled underground;
and a circulation pipe extending in a U shape from the ground into the borehole to provide a passage for water circulation,
The hybrid cooling system, characterized in that the water flowing into the circulation pipe is cooled by dissipating heat underground. 4. The method of claim 3,
The circulation pipe is a hybrid cooling system, characterized in that it is buried in the ground to a depth of 30m or more and 200m or less from the ground surface. According to claim 1,
The first cooling device,
a first heat pump including a third compressor, a third condenser, a third expansion valve, and a third evaporator, and producing low-temperature water from the third evaporator; and
A fourth compressor, a fourth condenser, a fourth expansion valve and a fourth evaporator, and a second heat pump for producing high-temperature water in the fourth condenser,
The first heat pump and the second heat pump are connected in series, and the heat energy emitted from the third condenser is supplied to the fourth evaporator. 6. The method of claim 5,
The hybrid cooling system, characterized in that the third refrigerant circulating the first heat pump and the fourth refrigerant circulating the second heat pump are different from each other. 3. The method of claim 2,
The second cooling device,
a first adsorption tank and a second adsorption tank each storing the adsorbent therein; and
A second evaporator for cooling the low-temperature water introduced from the low-temperature tank,
The hybrid cooling system, characterized in that the high-temperature water supplied from the high-temperature tank and the water supplied from the heat exchanger are alternately supplied to each of the first and second adsorption tanks. According to claim 1,
The adsorbent is
A hybrid cooling system comprising at least one of silica gel and zeolite. According to claim 1,
The hybrid cooling system is
and an air conditioner for selectively exchanging heat with the low-temperature water stored in the low-temperature tank or the high-temperature water stored in the high-temperature tank to cool or heat the room. According to claim 1,
The hybrid cooling system is
The hybrid cooling system according to claim 1, further comprising a solar heat collector for collecting solar heat and heating the hot water stored in the high-temperature tank.

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