KR20060094591A - An air-conditioning system using geothermal and chill in ice storage - Google Patents

Abstract

 The present invention uses a single unit heat pump means to transfer heat from the condenser and the evaporator to the transfer pipe means to simultaneously operate the cooling and heating, and to use the ice storage tank tank that can ice the ice during cooling operation to store and use the solidification heat The present invention relates to a simultaneous cooling and heating system using a geothermal and ice heat storage tank. The present invention relates to an evaporator, a compressor, a condenser, and an expansion in a conventional cooling and heating system serving as a cooling tower in the summer and a heat recovery in the winter. Heat pump means composed of valves, the circulation medium of which repeats liquefaction and vaporization; A coil unit unit connected to the heat pump means and forming a plurality of transfer pipes through which fluid having cold and warm air flows to discharge the temperature of the fluid flowing through the transfer pipe into the atmosphere; Geothermal loop means for discharging the heat generated from the condenser of the heat pump means to the ground or transferring heat transferred from the ground to the evaporator of the heat pump means; Conveying pipe means for connecting the heat pump means and the geothermal loop means; It is installed in a predetermined portion of the conveying pipe means comprises a cold water circulation pump means for forcibly transferring the circulating medium, a hot water circulation pump means and a geothermal circulation pump means to heat transfer the heat energy emitted from the evaporator and condenser to the conveying pipe means for cold and cold It features a single or simultaneous operation.

Description

An air-conditioning system using geothermal and chill in ice storage

1 is a system diagram of a heat storage air conditioning system using conventional geothermal heat.

Figure 2 is a system diagram of a heating and cooling system capable of simultaneous operation using the ground heat applied the technology of the present invention.

Figure 3 is a schematic diagram of a cooling and heating system capable of simultaneously operating using geothermal heat showing another embodiment of the present invention.

Figure 4a is a conceptual diagram of ice making / heating operation of the heating and cooling system showing that the simultaneous operation of the ice making and heating at night using the structure of Figure 3;

Figure 4b is a cooling operation conceptual diagram showing the operation during the cooling operation.

5 to 7 is a schematic diagram of a cooling and heating system capable of simultaneously operating using geothermal heat showing another embodiment of the present invention.

※ Explanation of code for main part of drawing ※

100: heat coil unit means 200: cold water circulation pump

300: hot water circulation pump 400: geothermal circulation pump

500: heat storage tank 600: fluid cooler

700: geothermal loop means 800: heat pump means

The present invention uses a single unit heat pump means to transfer heat from the condenser and the evaporator to the transfer pipe means to simultaneously operate the cooling and heating, and to use the ice storage tank tank that can ice the ice during cooling operation to store and use the solidification heat The present invention relates to a simultaneous heating and cooling system using geothermal and ice heat storage tanks.

In general, a heat pump is composed of an evaporator, a compressor, a condenser, and an expansion valve to allow the circulation medium to repeatedly liquefy and vaporize to perform heating and cooling through other peripherals connected thereto.

It is well known that such a heat pump is used as a main component of a waste heat utilization system using waste heat of domestic wastewater as a heat source or a geothermal utilization system that performs cooling and heating using a plurality of geothermal heat exchange pipes buried underground.

For example, the waste heat utilization system uses the heat pump to use the waste heat of domestic wastewater drained from a public bath having waste heat as a heat source of the heat pump evaporator and to produce hot water through a condenser to supply hot water and the like. It is.

The geothermal utilization system uses geothermal heat from the geothermal heat exchange pipe as a heat source for the heat pump evaporator and generates hot heat through the condenser to supply hot water, or an array of condensers generated by the heat pump during cooling. I) to be discharged through the geothermal heat exchange pipe.

However, in the waste heat using system, when the temperature of the domestic wastewater, which is a heat source, cannot supply hot water, such as a heat pump, additional auxiliary boilers must be installed to supply hot water, and thus additional cost is required.

Also, in the geothermal utilization system, if the geothermal heat exchange pipes buried in the ground due to the excessive condenser arrangement generated in the heat pump during cooling cannot accommodate this, the geothermal heat exchange pipes may be increased or accommodated, or the cooling tower may be accommodated. There was an uneconomical problem that had to be installed further.

In order to solve this problem, Korea Utility Model Registration No. 339349 has been pre-registered, and the heat storage type heat pump air-conditioning system using geothermal heat of Utility Model Registration No. 339349 is air-heated as a heat source as shown in FIG. The heat exchange circuit unit 10 is configured to perform cooling and heating through a plurality of geothermal heat exchange pipes 11 embedded in the ground, and the cooling and heating system forms a circulation cycle with the geothermal heat exchange pipes 11 and is connected to an evaporator. And hot and cold water obtained by cooling and heating the heat and heat from the heat and cooling heat pump 12 having a condenser, etc., form a circulation cycle with the heat and heat pump 12 for heating and cooling, and move to a cooling and heating place 13 in which a heat exchanger (not shown) is installed. The heat exchange with the outside air to perform cooling and heating or to supply hot water.

Reference numerals M1 and M2 denote circulation motors, and reference numeral V denotes three directions for changing the circulation path of the cold and hot water circulating through the heating / heating heat pump 12 and the cooling / heating place 13 as necessary. The valve is shown.

Therefore, when the heat exchange circuit unit 10 of this structure is heated during the winter season or the like, when the cool circulation medium, that is, brine passes through the geothermal heat exchange pipes 11 by driving the circulation motor M1, During the heat exchange with the geothermal heat, the circulation medium gets geothermal heat.

The circulating medium thus obtained geothermal heat is deprived of the geothermal heat obtained while passing through the evaporator of the heating and cooling heat pump 12, the geothermal heat is released back to the condenser of the heating and cooling heat pump 12 is the circulation motor ( The driving of M2) heats the circulating medium, ie, water, which circulates through this condenser.

The circulating medium warmed to a high temperature by this process is moved to the heating / cooling place 13 and is heated to the heating / cooling place 13 or supplied to a hot water supply. As a result of this process, the heat exchange circuit unit 10 recovers the ground heat recovered from the ground. Use for heating.

In addition, when cooling at a time such as summer, as the cooling and heating heat pump 12 performs a cooling cycle leading to compression, condensation, expansion, and vaporization, a circulating medium circulating the cooling and heating heat pump 12, that is, water It cools to this low temperature. The circulating medium cooled as described above is cooled by heat exchange with outside air while passing through the cooling / heating place 13.

At this time, the high temperature heat generated from the condenser of the heat and cooling heat pump 12 is transferred to the circulation medium ie, brine circulating the geothermal heat exchange pipes 11, and the geothermal heat exchange pipe Since they are released into the ground through (11), the use of existing outdoor units is excluded.

On the other hand, the Utility Model Registration No. 339349 is provided with a cold and hot water storage tank 20, the cold and hot water storage tank 20 is installed between the heat and cooling heat pump 12 and the heating and cooling place 13 in the heat exchange circuit section (10). The cold / hot water heat storage tank 20 serves as a medium for storing the cold / hot water from the air-conditioning heat pump 12 and supplying the cold / hot water to the air-conditioning place 13.

The cold / hot water heat storage tank 20 is configured to store or cool the hot and cold water from the heat / heating heat pump 12 with a predetermined cold / hot heat using a cheap midnight electric power, and the temperature of the cold / hot heat for cooling or cooling is It is sufficient to be able to maintain the temperature of the cold / hot water from the air-conditioning heat pump 12.

However, Utility Model Registration No. 339349 has a disadvantage in that it is not possible to operate heating and cooling at the same time. For example, the conventional air-conditioning device using geothermal heat as a heat source can not be used at the same time heating and cooling can not be used in the dual heating equipment for cooling and heating in the case where the heating and cooling load at the same time, such as ice rink. In addition, due to the length of geothermal heat exchange pipe, which serves as a cooling tower in summer and a heat recovery machine in winter, the installation area, equipment capacity, and construction cost of geothermal heat exchange pipe were excessively inefficient.

The present invention has been made to solve the above problems is an object of the present invention is to provide a heating and cooling system that enables the individual or air-conditioning simultaneous operation to reduce the heating and cooling operating costs using the ground heat.

Another object of the present invention is to reduce the length of the geothermal loop means (geothermal heat exchange pipe) by using an ice storage tank tank capable of ice-making during cooling and heating operation, and to use it for cooling by using the heat stored in the ice storage tank tank. . In addition, by installing a fluid cooler to minimize the length of the geothermal loop means (geothermal heat exchange pipe), the cooling and cooling efficiency can be maximized. By reducing the length of the geothermal loop means significantly, the installation area and the construction cost are reduced, thus providing an efficient and economical heating and cooling system. The purpose is to provide.

The purpose of the present invention described above is a conventional air-conditioning system consisting of a heat pump that performs a role of a cooling tower in the summer and a heat recovery device in the winter and repeats the liquefaction and vaporization of the circulating medium and heats and cools the air through peripheral devices. A system comprising: a heat pump means comprising an evaporator, a compressor, a condenser, and expansion valves, the circulation medium repeating liquefaction and vaporization; Shock coil unit means for discharging cold and warm air; Geothermal loop means for discharging the heat generated from the condenser of the heat pump means to the ground or transferring heat transferred from the ground to the evaporator of the heat pump means; Conveying pipe means for connecting the heat pump means and the geothermal loop means; It is installed in a predetermined portion of the conveying pipe means comprises a cold water circulation pump means for forcibly transferring the circulating medium, a hot water circulation pump means and a geothermal circulation pump means to transfer heat energy emitted from the evaporator and condenser to the conveying pipe means to heat and cool It is achieved by a simultaneous heating and cooling system using geothermal and ice heat storage tank, characterized in that the individual or simultaneous operation is possible.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic diagram of a simultaneous heating and cooling system using geothermal and ice storage tanks to which the present invention is applied. According to the present invention, a cooling and heating system according to the present invention comprises an evaporator, a compressor, a condenser, and an expansion valve. The heat pump means 800 that repeats the vaporization and the heat coil unit means 100 for discharging cold and warm air is connected.

At this time, the number of installation of the heat pump means 800 should be installed in proportion to the capacity, the coil unit means 100 is preferably a structure in which a plurality of pipes through which the fluid having cold and warm air flows.

On the other hand, the geothermal loop for discharging the heat generated from the condenser (800b) of the heat pump means 800 to the ground or the heat transferred from the ground to the evaporator (800a) of the heat pump means (800) Means 700 is connected to the heat pump means 800, the heat pump means 800 and the geothermal loop means 700 and the coil unit means 100 is connected by a transfer pipe means (900a, 900b) It is composed.

The evaporator and condenser includes a cold water circulation pump means 200, a hot water circulation pump means 300, and a geothermal circulation pump means 400 for forcibly transferring a circulating medium to a predetermined portion of the transfer pipe means 900a and 900b. The heat energy is discharged from the heat transfer pipe means to enable the cold and hot or cold operation individually or simultaneously.

Meanwhile, as illustrated in FIG. 3, an indirect ice storage tank 500 may be installed and used between the heat pump means 800 and the heat coil unit 100, and as shown in FIG. 5. As shown, the fluid cooling means 600 may be further installed and used to reduce the temperature of the circulating medium transferred between the heat pump means 800 and the geothermal loop means 700.

Figure 6 is a further embodiment of the present invention by installing a plurality of evaporator (800a) and a condenser (800b) in the heat pump means to absorb the heat of the circulation medium and underground transported to the coil unit 100 and underground The circulating medium transferred to the geothermal loop means 700 for dissipating heat may be configured to be closed circuits, respectively, and FIG. 7 may control the three-way valve to adjust the temperature of the circulating medium.

In the drawings, reference numerals 500-1 and 500-2 denote directional valves.

Referring to the operation effect of the cooling and heating system of the present invention having the structure as described above will be described first divided into the cooling operation, heating operation and simultaneous operation thereof.

Heating operation

A circulating medium is filled in the conveying pipe means 900a and 900b, and HFC-404A is preferably used as the refrigerant used in the circulating medium. When the heat pump means 800 is operated, the ground heat is transferred to the circulating medium flowing through the geothermal loop means 700. When the circulating medium has a predetermined heat exchange, the low temperature of the circulating medium is a geothermal circulation pump. It is forced to the heat pump means 800 through the 400.

The predetermined temperature of the circulating medium forcedly transferred to the heat pump means 800 is discharged by being heated by the condenser 800b of the heat pump means 800, and the discharged high temperature circulating medium is supplied to the hot water circulation pump 300. It is conveyed to the coil unit 100 connected by the conveying pipe means (900b).

The high temperature circulating medium transferred to the coil unit 100 emits high temperature into the atmosphere. The coil unit 100 of the present invention has been described as having a function similar to that of a general radiator. It can be used as a house, stadium, office, etc.

During cooling operation

When the heat pump means 800 is operated, the circulating medium having a predetermined temperature lost by the heat coil unit 100 is supplied to the heat pump means 800 through the transfer pipe means 900a. The circulating medium supplied to the heat pump means 800 is discharged at a low temperature in the evaporator 800a. At this time, the low temperature circulating medium through the evaporator 800a is transferred by the cold water circulation pump 200 to the coil unit 100. It is forcibly transported to) to release cold air.

Cooling / Heating Simultaneous Operation

When the heat pump means 800 is operated, heat in the ground is transferred to the circulation medium flowing through the geothermal loop means 700 so that the circulation medium maintains a predetermined temperature, and the heat pump means 800 through the geothermal circulation pump 400. The circulation medium forcedly transported to the high temperature is heated by the condenser 800b of the heat pump means 800 to discharge high temperature through the coil unit 100 connected to the transfer pipe means 900b to perform heating. The circulating medium, which has been lowered by the evaporator 800a of the heat pump means 800 in operation, is forcibly transferred to the shock coil unit 100 by the cold water circulation pump 200 to perform cooling.

As described above, the present invention can drive the cooling operation and the heating operation at the same time, and sometimes can be selectively operated in a separate operation state.

On the other hand, as shown in Figure 2, when the use of cooling and heating is similar, a plurality of heat pump means 800 can be installed and used, but as shown in Figure 3, when the use of cooling, that is, the cooling load is relatively high As such, the heating efficiency of the installed capacity installed by exceeding the capacity of the heat pump means 800 becomes unnecessary, so that an ice storage tank tank 500 for ice-making may be further installed to obtain the required cooling efficiency. Efficiency can be obtained.

In more detail, the ice storage tank tank 500 is installed at a predetermined portion of the transfer pipe means 900a between the heat pump means 800 and the heat coil unit 100, and the structure of the ice storage tank tank 500 is provided. The structure of the individual indirect ice making method is configured to penetrate the center of the conveying pipe means (900a) formed in the hollow, the ice storage tank tank 500 is filled with ordinary water (hereinafter referred to as a medium).

The reason for installing the ice storage tank tank 500 as described above is to reduce the load required during cooling by distinguishing between the cooling operation of the day and the deicing and heating operation of the night in relation to the cooling operation of the heat pump means (800). To explain the first ice making operation at night, as shown in FIG. 3, the first direction switching valve 500-1 installed at the front end of the ice storage tank 500 is closed in all directions to convey the pipe pipe 900a. Control the pipeline to the closed state and the second direction switching valve (500-2) is closed to the coil unit 100 direction to control the valve to switch the transfer direction of the circulation medium to the ice storage tank (500) direction do.

As described above, when the first direction switching valve 500-1 and the second direction switching valve 500-2 are controlled, and the heat pump means 800 is operated, heat is transferred by the evaporator 900a to transfer the pipe means 900a. The low temperature circulating medium has an ice storage tank 500. At this time, since the medium of the ice storage tank 500 is continuously circulated, the medium of the ice storage tank 500 is iced by the low temperature circulating medium.

As described above, when the medium of the ice storage tank 500 is iced, the heating operation is performed simultaneously with the ice making operation as shown in FIG. 4A. The first direction switching valve 500 is the same as in the ice making operation of FIG. 3. -1) and the second direction switching valve 500-2 maintains the state, and the heating operation closes the operation of the geothermal circulation pump 400 to connect the geothermal loop means 700 and the heat pump means 800. Disconnect the operation.

Eventually, the use of the geothermal loop means 700 is limited. Therefore, heat is transferred to the conveying pipe means 900b connected to the condenser 900b of the heat pump means 800 so that the circulating medium becomes a high temperature to the coil unit means 100. It is forcibly transported by the hot water circulation pump 300 to emit high temperature heat, thereby providing the effect of heating.

As described above, the medium of the ice storage tank 500 is made in an ice state at night when the cooling operation is not performed. In this case, the heating operation is simultaneously with the ice making operation and the heating operation is performed because the heating is used at night when the temperature drops. It is operated in the same way as the heating operation described in the above.

 In addition, when the cooling is to be performed by the cooling operation during the day as shown in Figure 4b the second direction switching valve (500-2) is open to allow the transfer from the coil unit means 100 to the heat pump means (800) While maintaining the transfer in the direction of the ice heat storage tank 500 in the shock coil unit means 100 is closed, the first direction switching valve (500-1) is the heat coil means means in the coil unit means (800) In order to prevent the transfer to 100 directly, the pipe in the direction of the heat pump means 800 in the direction of the coil unit means 100 is closed, and the pipe in the direction of the ice storage unit 500 in the direction of the coil unit means 100 is opened. Control by state.

As described above, when each of the directional control valves is controlled, when the heat pump means 800 is operated, the circulating medium is transferred from the coil unit 100 to the heat pump means 800 to the ice storage tank 500 to be iced at night. The low temperature coagulation heat is supplied to the circulating medium by using low temperature coagulation heat. At this time, the heat pump means 800 is not operated and the circulation is repeated. After a predetermined time, the ice storage tank tank 500 The heat pump means 800 is operated when the medium is thawed to prevent the supply of a low temperature heat source.

Meanwhile, as shown in FIG. 5, a fluid cooling means 600 may be further installed between the heat pump means 800 and the geothermal loop means 700, and the fluid cooling means 600 may be further used. The main reason for the installation is to lower the temperature of the circulating medium to be transported, and to lower the temperature so that more ground heat can be used.

 Figure 6 is a further embodiment of the present invention by installing a plurality of evaporator (800a) and a condenser (800b) in the heat pump means to absorb the heat of the circulation medium and underground transported to the coil unit 100 and underground The circulating medium transferred to the geothermal loop means 700 for releasing heat to the closed circuit can also be adjusted to control the evaporator 800a and the condenser 800b which are connected to the geothermal loop means 700 during the heating and cooling operation. Condenser → 순환 coil unit (100) → evaporator → condenser using the evaporator (800a) and condenser (800b) where the circulating medium is not interrupted, or evaporator → 휀 coil unit (100) → condenser → evaporator (Evaporator 800a and condenser 800b allow the circulating medium to repeat liquefaction and vaporization by cycle operation to perform heating and cooling through other peripheral devices connected thereto). Heat pump means) by intermittent the evaporator (800a) and the condenser (800b) connected to the geothermal loop means 700 to prevent heat from being released to the ground.

On the other hand, Figure 7 is a structure that controls the temperature of the circulating medium by controlling the three-way valve to look at its operation, the circulation medium is transferred to the geothermal loop means 700 by intermittent the first valve and the second valve during the simultaneous heating and cooling operation To prevent the loss of the heat source using the heat pump means (800).

For example, the low temperature heat discharged from the evaporator 800a receives heat transfer in the transfer pipe to reduce the temperature of the circulating medium to provide cooling effect. In the condenser 800b, the circulating medium receives heat transfer from the high temperature heat source in the transfer pipe. It is to use the discarded heat source by heat transfer to a heat source generated in a cycle through the transfer pipe to provide a heating effect by heating to a high temperature.

In the cooling operation, the low temperature heat source, which is discharged through the evaporator 800a of the heat pump means 800, transfers heat to the transfer pipe 900a. The four-valve passes through the coil unit 100 to discharge cold air at low temperature, thereby providing cooling effect, and the circulating medium that loses a predetermined temperature is circulated again and passed through the first pump to the heat pump means 800. At this time, the second valve and the third valve connected to the condenser 800b are intermittent so that the transfer pipe 900b of the heating line is closed (operation) and the line connecting the third and fourth valves is closed. And the line is connected when the heat pump means 800 is not operated to serve as a bypass passage.

On the other hand, in the operating state during the heating operation, a high temperature heat source discharged through the condenser 800b of the heat pump means 800 transfers heat to the transfer pipe 900b so that the circulating medium becomes a high temperature purified medium that has become high temperature. The third valve provides a heating effect by releasing high-temperature heat from the shock coil unit 100 via the third valve, and the circulating medium that loses a predetermined temperature is circulated again to be passed through the second pump to the heat pump means 800. do. At this time, the first valve and the fourth valve connected to the evaporator 800a are intermittent so that the transfer pipe 900a of the heating line is closed (operation).

As described above, the present invention provides a high-efficiency air-conditioning by installing a geothermal loop means in the ground to use a uniform and stable underground temperature throughout the year against the insufficient air heat source, thereby providing high-efficiency air-conditioning and energy saving and operation cost reduction effect. There is an effect that can be obtained.

In addition, the heat pump is capable of simultaneous heating and cooling as a single unit even in applications where simultaneous heating and cooling loads such as an ice rink are present. It is possible to reduce the operation cost by using the midnight power.

In addition, it is installed between the heat pump and the geothermal loop means, and by installing a fluid cooler that manages the temperature of the circulating medium entering the geothermal loop means, the length and installation amount of the geothermal loop means can be reduced. Since the installation area, equipment capacity, and construction cost can be reduced with higher energy efficiency than the prior art, it is possible to see an excellent economic effect.

Claims (4)

 In a typical air-conditioning and heating system consisting of a geothermal loop means that performs the role of a cooling tower in the summer and a heat recovery device in the winter, and a heat pump that repeats the liquefaction and vaporization of the circulating medium and heats and cools the air through peripheral devices. A heat pump means consisting of an evaporator, a compressor, a condenser, and expansion valves, the circulation medium of which is liquefied and vaporized repeatedly; A coil unit unit connected to the heat pump means and forming a plurality of conduits through which fluid having cold and warm air flow, thereby discharging the temperature of the fluid flowing through the conduits into the atmosphere; Geothermal loop means for discharging the heat generated from the condenser of the heat pump means to the ground or transferring heat transferred from the ground to the evaporator of the heat pump means; Conveying pipe means for connecting the heat pump means and the geothermal loop means; Installed in a predetermined portion of the conveying pipe means for cooling by consisting of cold water circulation pump means for forcibly transferring the circulation medium, hot water circulation pump means and geothermal circulation pump means (Evaporation), simultaneous heating and cooling system using a geothermal heat and ice storage tank, characterized in that the energy to radiate heat in the opposite cycle during the heating (condensation) by using the conveying pipe means. The geothermal heat treatment according to claim 1, further comprising an indirect ice storage tank tank of the indirect ice-making method and a first and second direction switching valve for switching the direction of the circulating medium between the heat pump means and the coil unit. And simultaneous heating and cooling system using ice heat storage tank. The simultaneous heating and cooling system according to claim 1, further comprising a fluid cooling means for lowering the temperature of the circulation medium transferred between the heat pump means and the geothermal loop means. According to claim 1 and 2, wherein a plurality of evaporators and condensers installed in the heat pump means of the single unit circulation to the circulation medium transferred to the coil unit and the geothermal loop means for absorbing and dissipating the heat of the ground Simultaneous cooling and heating system using a geothermal and ice heat storage tank, characterized in that the medium is composed of a closed circuit.

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