KR101655664B1 - Geothermal system for heatsource compensation using water storage tank and geothermal source - Google Patents

Geothermal system for heatsource compensation using water storage tank and geothermal source Download PDF

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Publication number
KR101655664B1
KR101655664B1 KR1020150050362A KR20150050362A KR101655664B1 KR 101655664 B1 KR101655664 B1 KR 101655664B1 KR 1020150050362 A KR1020150050362 A KR 1020150050362A KR 20150050362 A KR20150050362 A KR 20150050362A KR 101655664 B1 KR101655664 B1 KR 101655664B1
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South Korea
Prior art keywords
heat exchanger
geothermal
heat
tank
source
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KR1020150050362A
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Korean (ko)
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김정진
김진경
정상혁
최원범
박보영
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주식회사 한화에스테이트
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/06—Heat pumps characterised by the source of low potential heat
    • F24J3/08—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F24J2003/08—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/002—Compression machines, plants or systems with reversible cycle not otherwise provided for geothermal

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The geothermal heat source system according to the present invention includes a water tank 110 for storing water at room temperature, a water supply unit for supplying cold and hot water to a customer in a state connected to the water tank 110 through a water supply pipe path 114 The groundwater heat exchanger 120 capable of obtaining geothermal heat and the groundwater heat exchanger 120 disposed between the groundwater heat exchanger 120 and the reservoir tank 110. [ A heat pump 140 installed between the geothermal heat exchanger 120 and the plate heat exchanger 160 and having a cycle for cooling and heating, a heat pump 140 installed between the heat pump 140 and the plate heat exchanger 160, A buffer tank 130 which is selectively communicated with the hot water tank 140 or the plate heat exchanger 160 to provide a cooling or heating load and a hot water tank 150 which receives hot water from the water tank 110.
In the present invention, a geothermal heat source system using a reservoir tank and a geothermal source is provided with a plate heat exchanger capable of exchanging heat between the water in the reservoir tank for supplying hot water and the heat source on the side of the geothermal heat exchanger, Thereby improving efficiency.

Figure R1020150050362

Description

TECHNICAL FIELD [0001] The present invention relates to a geothermal system compensating a geothermal system using a water tank and a geothermal source,

[0001] The present invention relates to a geothermal heat source system using a reservoir tank and a geothermal source. More particularly, the present invention relates to a geothermal system for a geothermal heat pump, The present invention relates to a geothermal system for compensating a heat source using a reservoir tank and a geothermal source for improving the system efficiency by compensating for water temperature.

Recently, as a part of national policy, the application of geothermal systems, new and renewable energy, to buildings is continuously expanding. In order to construct a geothermal system, a design process of a heat exchanger buried in the ground is required. This process calculates the period load on the basis of the peak load of the building, the change of the ambient temperature and the operation time of the building, (Specifically, depth x hole) is determined.

As a result, the design of the geothermal system has a limitation in that efficiency is lowered when the system is constructed according to the period load for a certain period and it is used for a predetermined time or more.

In reality, when the operation time is doubled in the process of operating the system, the decrease in performance and capability according to the ground temperature can be seen to be about 10%. In addition, there is a problem in that heat can be continuously used in a state where the stored energy of the underground heat source is higher than the stored energy, and the operation of the equipment can be stopped if the operation is continued for a long period of time.

As a conventional literature suggesting a heat pump system for both cooling and heating which can heat or store heat in a heat storage tank by applying a heat source such as a geothermal source, a wastewater, or a solar heat source as a heat source, 10-1454282 (Oct. 17, 2014).

In the above document, it is possible to compensate the capacity of the heat source by returning a part of the heat amount to the customer's air conditioning member to the external heat exchanger or the heat storage tank and then returning it to the heat source side after the heat exchange, so that it is possible to install a large- However, there is a limitation in that it does not disclose a method for enabling the temperature compensation of a geothermal source through a process of supplying hot water to the room during heating or cooling.

(Patent Document 1) KR10-1454282 B

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to improve the system efficiency by compensating the temperature of the heat source water by providing a plate type heat exchanger capable of exchanging heat between the water of the water tank and the heat source of the underground heat exchanger It is an object of the present invention to provide a geothermal heat-compensating system using a reservoir tank and a geothermal source.

In addition, the present invention provides a plate heat exchanger capable of performing heat exchange in a state in which the load side and the heat source side are not passed through the heat pump in the case of performing the cooling compensation operation in the season of change, So that heat exchange can be performed.

In addition, the present invention reduces the energy required when hot water is used by connecting a hot geothermal source generated during the cooling process to a hot water supply system to instantaneously raise the temperature of the water supply.

According to another aspect of the present invention, there is provided a geothermal heat-compensated geothermal system including: a water tank for storing water at room temperature; An underground heat exchanger (120) capable of obtaining a geothermal heat; A water supply unit 113 for supplying the cold / hot water to the customer in the water tank 110; A hot water compensation tank 150 connected to the water tank tank 110; At least one of which enables heat exchange between the hot water from the reservoir tank (110) and a geothermal source from the underground heat exchanger (120) while being disposed between the underground heat exchanger (120) and the reservoir tank (110) The plate heat exchanger 160; A heat pump (140) installed between the underground heat exchanger (120) and the plate heat exchanger (160) and having a cycle for cooling and heating; A buffer tank 130 selectively connected to the heat pump 140 or the plate heat exchanger 160 to provide a cooling or heating load; A heat source compensation pump 171 disposed on the low-water flow path 170 from the reservoir tank 110; And a plurality of temperature sensors 173, 183 and 193 disposed on a channel between the underground heat exchanger 120, the reservoir tank 110 and the buffer tank 130. The buffer tank 130, The geothermal heat source in the geothermal heat exchanger 120 is connected to the heat pump 140 and the plate heat exchanger 160 in the course of the cold / hot water flowing through the heat pump 140 or the plate- And operates the heat source compensation pump 171 by using the measured values of the plurality of temperature sensors 173, 183 and 193 so that the stored water in the reservoir tank 110 flows through the plate heat exchanger 160 Thereby making it possible to compensate the geothermal source temperature.

The plate heat exchanger 160 includes a first plate heat exchanger 161 connected to the reservoir tank 110, the underground heat exchanger 120 and the heat pump 140, and a first plate heat exchanger 161 connected to the reservoir tank 110, And a second plate heat exchanger (166) connected to the buffer tank (130).

The plurality of temperature sensors 173, 183 and 193 may include a first temperature sensor 173 disposed on a channel between the reservoir tank 110 and the first plate heat exchanger 161, A second temperature sensor 183 disposed on a channel between the heat pump 140 and a third temperature sensor 193 disposed on a channel between the buffer tank 130 and the heat pump 140 do.

The geothermal heat source from the geothermal heat exchanger 120 is connected to the heat pump 140 and the heat pump 140 when the cooling water is supplied from the buffer tank 130 to the customer through heat exchange between the buffer tank 130 and the heat pump 140. [ The stored water from the reservoir tank 110 is supplied to the heat source compensating pump 171 and the first plate heat exchanger 161 through the first plate heat exchanger 161, The temperature of the geothermal circulation through the first plate type heat exchanger 161 is lowered to return to the geothermal heat exchanger 120.

The geothermal heat source from the geothermal heat exchanger 120 is connected to the heat pump 140 and the heat pump 140 when the buffer tank 130 supplies heat to the customer through heat exchange between the buffer tank 130 and the heat pump 140. [ The stored water from the reservoir tank 110 is supplied to the heat source compensating pump 171 and the first plate heat exchanger 161 through the first plate heat exchanger 161, The temperature of the geothermal circulation through the first plate type heat exchanger 161 is increased to return to the geothermal heat exchanger 120.

The operation of the heat pump 140 is stopped at the time of a change of circulation and the load side fluid in the buffer tank 130 circulates through the second plate type heat exchanger 166 and the water supply from the reservoir tank 110 The circulation through the first plate type heat exchanger 161 and the second plate type heat exchanger 166 and the geothermal heat source from the geothermal heat exchanger 120 is circulated through the first plate type heat exchanger 166 without heat exchange through the heat pump 140. [ Heat exchange is performed only through the heat exchanger 161.

The geothermal heat source from the geothermal heat exchanger 120 is supplied to the underground heat exchanger 120 through the heat pump 140 and the first plate heat exchanger 161, And the water supply from the hot water supply compensation tank 150 is returned to the hot water supply compensation tank 150 through the heat source compensation pump 171 and the first plate heat exchanger 161, The geothermal heat source from the heat pump 140 and the water from the hot water compensating tank 150 perform heat exchange in the water heat exchanger 161 so that the temperature of the water returning to the hot water compensating tank 150 increases, (120) side to the hot water supply compensation tank (150) side.

In the geothermal heat-compensating system using the reservoir tank and the geothermal heat source according to the present invention, a plate-like heat exchanger capable of exchanging heat between the water in the reservoir tank for supplying hot water and the heat source on the side of the underground heat exchanger is installed, Compensate to improve system efficiency.

That is, if water at room temperature coming in through a water supply pipe is used as a temperature-compensating heat source on the geothermal side, energy saving is effective in the case of cooling and heating.

In addition, the present invention enables a general geothermal operation mode to be divided into four operation modes such as a geothermal heat compensation operation in cooling mode, a cooling mode compensation operation in a cooling mode, a geothermal heat compensation operation in heating mode and a hot water supply compensation operation in cooling mode, And reduce energy costs by improving equipment operation efficiency.

1 is a conceptual diagram of a geothermal heat-compensating system using a reservoir tank and a geothermal source according to an embodiment of the present invention;
FIG. 2 is an operating state diagram showing a geothermal heat compensation operation process during cooling,
FIG. 3 is an operating state diagram showing a process for compensating for a cooling-
4 is an operating state diagram showing a geothermal heat compensation operation process during heating,
5 is an operating state diagram showing a process of compensating the hot water supply during cooling, and
6 is a conceptual diagram of a geothermal heat-compensating system using a reservoir tank and a geothermal source according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely. Wherein like reference numerals refer to like elements throughout.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected,""coupled," or "connected. &Quot;

FIG. 1 is a conceptual diagram of a geothermal heat source system using a reservoir tank and a geothermal source according to the present invention, FIG. 2 is an operating state diagram showing a geothermal heat compensation operation process during cooling, and FIG. 3 is an operational state diagram FIG. 4 is an operating state diagram showing a geothermal heat compensating operation process at the time of heating, and FIG. 5 is an operational state diagram illustrating a refrigerant hot water compensating operation process.

1, the geothermal heat source compensated geothermal system according to an embodiment of the present invention includes a water tank 110 for storing water at room temperature, a water tank 110 connected to the water tank 110 through a water supply pipe path 114, A groundwater heat exchanger 120 that can acquire geothermal heat, a groundwater heat exchanger 120 that is disposed between the geothermal heat exchanger 120 and the water tank tank 110, A plate heat exchanger 160 for exchanging heat between hot water from the reservoir tank 110 and the geothermal water from the underground heat exchanger 120 and a heat exchanger 160 installed between the underground heat exchanger 120 and the plate heat exchanger 160, A buffer tank 130 selectively communicating with a heat pump 140 having a cycle for cooling and heating or a heat pump 140 or a plate heat exchanger 160 to provide a cooling or heating load and a water tank 110 Hot water compensation tank (150).

The water tank 110 has a structure that receives hot water and hot water from a water supply source 111 and transfers the water to the water supply unit 113 or the hot water supply compensation tank 150 through a water supply pipe line 114. The hot water supply compensating tank 150 is connected to the hot water supply source 152 through the hot water supply pipe 152. The hot water supply compensating tank 150 is connected to the hot water supply source 152 via a hot water supply pump 154 .

The first plate heat exchanger 161 includes a reservoir tank 110, an underground heat exchanger 120, a heat pump 140, and a hot water supply compensating tank 160. The plate heat exchanger 160 includes a plurality of plate heat exchangers 161 and 166, And the second plate type heat exchanger 166 is connected to the reservoir tank 110, the first plate type heat exchanger 161, and the buffer tank 130,

The geothermal heat source compensated geothermal system according to the present invention includes a plurality of circulation conduits around a reservoir tank 110, an underground heat exchanger 120, a heat pump 140, and a buffer tank 130.

The plurality of circulation conduits include a water circulation conduit 170 for allowing the water contained in the water tank 110 to the water tank compensation tank 150 to flow, a geothermal circulation conduit 170 for circulating a geothermal source in the geothermal heat exchanger 120, And a cold / hot water circulation conduit 190 for allowing the flow of cold / hot water subjected to a load on the circulation duct 180 and the buffer tank 130.

The water circulation conduit 170 selectively connects the water tank 110, the plate heat exchanger 160, and the hot water supply compensating tank 150 with each other.

A first temperature sensor 173, a first three-way valve 175, a second three-way valve 176, a first anisotropic valve 177, and a second anisotropic valve 177. The heat source compensation pump 171, the first temperature sensor 173, Valve < / RTI >

The first and second three-way valves 175 and 176 are three-way valves for selectively flowing the water supplied from the water tank tank 110 or the hot water tank compensation tank 150 to the plate heat exchanger 160, Only the water supplied from the hot water supply compensating tank 150 flows through the plate heat exchanger 160 while the water supplied from the reservoir tank 110 flows through the plate heat exchanger 160 in the other modes.

In the case of the first and second anisotropic valves 177 and 178, the first and second anisotropic valves 177 and 178 are closed in the cooling operation state hot water compensation operation mode, and in the other modes, The valve 177 is closed, and the second anisole valve 178 is opened.

The first temperature sensor 173 may be disposed between the heat source compensation pump 171 and the first three-way valve 175. The first temperature sensor 173 detects the temperature of the water supplied from the water tank 110 or the hot water tank 150 and transmits the sensed temperature to the controller.

The geothermal source circulation conduit 180 selectively connects the closed-type geothermal heat exchanger 120, the heat pump 140, and the plate-type heat exchanger 160 to each other. The geothermal heat source of the geothermal heat exchanger 120 flows through the heat pump 140 and the plate heat exchanger 160 through the supply header 121 and the water return header 122 in this embodiment.

On the geothermal circulation channel 180, a geothermal circulation pump 181, a second temperature sensor 183, and a third three-way valve 185 are included.

The second temperature sensor 183 may be disposed between the geothermal circulation pump 181 and the third three-way valve 185. Here, the second temperature sensor 183 senses the temperature of the geothermal source supplied from the geothermal heat exchanger 120 through the heat pump 140, and transmits the sensed temperature to the control unit.

The cold / hot water circulation conduit 190 selectively connects the buffer tank 130, the heat pump 140, and the plate heat exchanger 160 with each other.

A cold / hot water convection pump 191, a third temperature sensor 193, and a fourth three-way valve 195 on the cold / hot water circulation line 190.

The third temperature sensor 193 may be disposed between the cold / hot water convection pump 191 and the fourth three-way valve 195. Here, the third temperature sensor 193 senses the temperature of the cold / hot water flowing in the buffer tank 130 and transmits the sensed temperature to the control unit.

The third and fourth three-way valves 185 and 195 are three-way valves.

The geothermal heat source in the geothermal heat exchanger 120 is connected to the heat pump 140 through the heat pump 140 or the plate heat exchanger 160 in the buffer tank 130 for cooling and heating, And the plate-type heat exchanger 160. The control unit operates the heat source compensation pump 171 using the measured values of the plurality of temperature sensors 173, 183, and 193 to convert the stored water in the reservoir tank 110 into a plate heat exchanger 160 to allow compensation of the geothermal source temperature.

Hereinafter, an operation state of the geothermal heat compensation operation mode during cooling will be described with reference to FIG.

The temperature of the geothermal heat source side rises slightly due to the operation of the heat pump 140 as the load of the customer increases in the case of a large heat load or a large cooling load, and the operation efficiency of the equipment may decrease as the operation condition is continued. This mode prevents this.

In the following, the specific flow of the geothermal source and water supply is shown.

The geothermal heat source is operated to the first plate heat exchanger 161 side in which the third three-way valve 185 performs the geothermal circulation compensation during the cooling operation and the fluid in the geothermal circulation pump 181 is discharged from the geothermal circulation pump 181 to the heat pump 140, -> first plate heat exchanger 161 -> third three-way valve 185 -> return header 122 -> underground heat exchanger 120 -> feed header 121 -> geothermal circulation pump 181 .

At the same time, at the same time, the heat source compensation pump 171 is activated and the water supply fluid from the water tank 110 is supplied to the first three-way valve 175, the heat source compensation pump 171, the first plate heat exchanger 161, 2 three-way valve 176 -> second anisotropic valve 178 -> reservoir tank 110.

In the first plate type heat exchanger 161 that performs the geothermal resource compensation function, heat exchange occurs between the geothermal heat source from the heat pump 140 and the water supply side from the water tank 110, and the temperature of the geothermal heat source side is lowered .

In the case of performing the geothermal heat compensation operation mode, the design temperature condition based on the summertime may be a water supply temperature of 10 to 15 degrees in the water tank 110, and a temperature of the geothermal heat source may be 30 to 35 degrees . The operation progresses under the condition that the measured temperature of the second temperature sensor 183 for measuring the temperature of the geothermal source coming from the underground heat exchanger 120 is lower than the first temperature sensed for measuring the temperature of the water exiting the water tank 110 Is maintained at a value higher than the measured temperature of the sensor 173.

The coefficient of performance (COP) through the above-mentioned geothermal heat compensation operation mode during cooling is increased from 3.47 to 4.39, thereby reducing the operation cost by at least 27%.

Hereinafter, an operation state of the air conditioning cooling operation mode will be described with reference to FIG.

In the spring, fall, or when a weak cooling is required, the heat pump 140 is operated intermittently, and this mode realizes this.

In the following, the specific flow of the geothermal source and water supply is shown.

The load side fluid is supplied to the cold / hot water convection pump 193 -> the second side heat exchanger 166, The fourth four-way valve 195, the second plate type heat exchanger 166, the buffer tank 130, the cold / hot water convection pump 193, and the like.

At the same time, while the second three-way valve 176 on the water supply side is operated as the second plate type heat exchange unit 166 as the cooling compensation heat exchanger, the water is supplied to the heat source compensation pump 171, the first plate heat exchanger 161, The heat exchanger 166 -> the first anisotropic valve 178 -> the reservoir tank 110 -> the heat source compensation pump 171.

In order to use the heat source of geothermal heat, the geothermal circulation pump (181) -> heat pump (140) -> first plate heat exchanger (161) -> The three-way valve 185 -> the return header 122 -> the underground heat exchanger 120 -> the supply header 121 -> the geothermal circulation pump 181.

The conditions under which the operation proceeds in the case of performing the operation in the cooling mode compensation operation mode include a first temperature sensor 173 for measuring the temperature measured by the second temperature sensor 183 and the water supplied from the water tank 110 The measurement temperature is kept lower than the measurement temperature of the third temperature sensor 193 which measures cold and hot water coming from the buffer tank 130. [

The heat pump 140 can be stopped through the cooling mode in the cooling mode during the season, thereby saving the operation cost by 100%. That is, since only a small pump power is required, the power can be remarkably reduced.

Hereinafter, an operation state of the geothermal heat compensation operation mode during heating will be described with reference to FIG.

When the cold weather or the heating load is large, the temperature of the geothermal heat source side is gradually lowered due to the operation of the heat pump 140 as the load of the customer increases. As the operation condition is continued, the operation efficiency of the equipment may decrease. The mode prevents this.

In the following, the specific flow of the geothermal source and water supply is shown.

The geothermal heat source is operated to the first plate heat exchanger 161 side in which the third three-way valve 185 compensates for the geothermal heat source during the heating operation, and the fluid in the geothermal circulation side is supplied to the geothermal circulation pump 181, -> first plate heat exchanger 161 -> third three-way valve 185 -> return header 122 -> underground heat exchanger 120 -> feed header 121 -> geothermal circulation pump 181 .

At the same time, at the same time, the heat source compensation pump 171 is activated and the water supply fluid from the water tank 110 is supplied to the first three-way valve 175, the heat source compensation pump 171, the first plate heat exchanger 161, 2 three-way valve 176 -> second anisotropic valve 178 -> reservoir tank 110.

In the first plate type heat exchanger 161 that performs the geothermal resource compensation function, heat exchange is performed between the geothermal heat source from the heat pump 140 and the water supply side from the water tank 110, and the temperature of the geothermal heat source is increased .

In the case of performing the above-mentioned geothermal heat compensation operation mode during heating, the design temperature condition based on the winter season may be a water supply temperature in the reservoir tank 110 of 5 degrees or more and a temperature of the geothermal source side in the range of 0 to 5 degrees. The conditions under which the operation is performed are maintained such that the measured temperature at the second temperature sensor 183 is smaller than the measured temperature of the first temperature sensor 173 that is discharged from the water tank 110.

The above coefficient of performance (COP) through the geothermal heat compensating operation mode is increased from 3.25 to 3.51, so that the operation cost is reduced by at least 8%. Considering the actual water temperature, the cost reduction effect is expected to be larger do.

Hereinafter, an operation state of the cooling water hot water compensating operation process will be described with reference to FIG.

When there is a demand for hot water supply in a hot or cold operation, the heat of the geothermal heat source is supplied to the water supplied by hot water supply, and this mode realizes this.

In the following, the specific flow of the geothermal source and water supply is shown.

The geothermal circulation pump 181 -> heat pump 140 -> first plate heat exchanger 161 -> the third heat source of the geothermal heat source is the same as the geothermal heat compensating operation, The three-way valve 185 -> the return header 122 -> the underground heat exchanger 120 -> the supply header 121 -> the geothermal circulation pump 181.

At the same time, the heat source compensation pump is activated, and the water supply fluid flows through the first plate heat exchanger 161, the second three-way valve 176, the first one-way valve 177, the hot water supply compensation tank 150, (175) -> heat source compensation pump (171).

In the first plate type heat exchanger 161, heat exchange is performed between the geothermal heat source from the heat pump 140 and the water supply side from the hot water supply compensation tank 150, so that the temperature of the hot water supply compensation tank 150 rises, The temperature is lowered.

Such an operation method can be configured through proportional control.

The condition under which the operation proceeds when the cooling water heating compensation operation mode is performed is that the temperature measured by the second temperature sensor 183 is lower than the temperature detected by the first temperature sensor 173 ). ≪ / RTI >

The cooling water hot water supply compensation operation increases the operation efficiency by primarily raising the temperature of the hot water supplied to the hot water supply source 152 by using the temperature of the geothermal heat generated by the heat pump 140, .

Hereinafter, referring to FIG. 6, a heat source compensated geothermal system according to another embodiment of the present invention will be described. In the following description, the same parts as those of the heat source compensated geothermal system according to the embodiment (see FIG. 1) are not described and only different parts are described.

In this heat source-compensated geothermal system, the function of transferring the heat of the geothermal source from the open-loop geothermal heat exchanger 120 'and the geothermal heat exchanger 120' to the heat pump 140 to the first plate-type heat exchanger 161 And an intermediate plate heat exchanger (168).

That is, the geothermal heat source of the geothermal heat exchanger 120 'does not directly flow from the heat pump 140 to the first plate type heat exchanger 161 but transfers heat from the geothermal heat source through the intermediate plate type heat exchanger 168 The received heat transfer medium flows from the heat pump 140 to the first plate heat exchanger 161 through the geothermal circulation line 180. Accordingly, it is possible to prevent a problem caused by various impurities that can flow into the geothermal source from flowing to the heat pump 140 in advance.

In the geothermal heat-compensating system using the reservoir tank and the geothermal heat source according to the present invention, a plate-like heat exchanger capable of exchanging heat between the water in the reservoir tank for supplying hot water and the heat source on the side of the underground heat exchanger is installed, Compensate to improve system efficiency.

It is to be understood that the terms "comprises", "comprising", or "having" as used in the foregoing description mean that the constituent element can be implanted unless specifically stated to the contrary, But should be construed as further including other elements. All terms, 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, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

110: Reservoir tank
113:
120: Underground heat exchanger
130: Buffer tank
140: Heat pump
150: Hot water supply compensation tank
160: plate heat exchanger
170: Water circulation conduit
180: Geothermal circulation duct
190: cold / hot water circulation duct

Claims (7)

A water storage tank (110) for storing water at room temperature;
An underground heat exchanger (120) capable of obtaining a geothermal heat;
A water supply unit 113 for supplying the cold / hot water to the customer in the water tank 110;
A hot water compensation tank 150 connected to the water tank tank 110;
At least one of which enables heat exchange between the hot water from the reservoir tank (110) and a geothermal source from the underground heat exchanger (120) while being disposed between the underground heat exchanger (120) and the reservoir tank (110) The plate heat exchanger 160;
A heat pump (140) installed between the underground heat exchanger (120) and the plate heat exchanger (160) and having a cycle for cooling and heating;
A buffer tank 130 selectively connected to the heat pump 140 or the plate heat exchanger 160 to provide a cooling or heating load;
The water storage tank 110, the plate heat exchanger 160, and the hot water supply compensating tank 150 are selectively connected to each other to selectively supply water stored in the water storage tank 110 to the hot water supply compensation tank 150, A flow conduit 170;
A heat source compensation pump 171 disposed on the water flow path 170 from the reservoir tank 110; And
And a plurality of temperature sensors (173, 183, 193) disposed on a channel between the underground heat exchanger (120), the reservoir tank (110), and the buffer tank (130)
The plate-type heat exchanger (160)
A first plate heat exchanger 161 connected to the reservoir tank 110, the underground heat exchanger 120 and the heat pump 140,
And a second plate heat exchanger (166) connected to the reservoir tank (110), the first plate heat exchanger (161), and the buffer tank (130)
The geothermal heat source in the geothermal heat exchanger 120 is connected to the heat pump 140 through the heat pump 140 or the plate heat exchanger 160 in the buffer tank 130 for cooling / 140 and the plate heat exchanger 160,
The first temperature sensor 173 disposed on the low-fluid flow path 170 senses the temperature of the water supplied from the water tank 110 or the hot water compensation tank 150,
The heat source compensating pump 171 is operated by using the measured values of the plurality of temperature sensors 173, 183 and 193 to cause the stored water in the reservoir tank 110 to flow through the plate heat exchanger 160, To enable compensation of temperature,
A Geothermal Heat Source Compensated Geothermal System Using a Reservoir Tank and a Geothermal Source.
delete The method according to claim 1,
The plurality of temperature sensors (173, 183, 193)
A first temperature sensor 173 disposed on a channel between the water tank 110 and the first plate heat exchanger 161,
A second temperature sensor 183 disposed on the channel between the underground heat exchanger 120 and the heat pump 140,
And a third temperature sensor (193) disposed on a channel between the buffer tank (130) and the heat pump (140).
A Geothermal Heat Source Compensated Geothermal System Using a Reservoir Tank and a Geothermal Source.
The method according to claim 1,
When cooling is supplied from the buffer tank 130 to a customer through heat exchange between the buffer tank 130 and the heat pump 140,
The geothermal heat source from the geothermal heat exchanger 120 is returned to the underground heat exchanger 120 via the heat pump 140 and the first plate heat exchanger 161,
The water stored in the reservoir tank 110 is returned to the reservoir tank 110 through the heat source compensation pump 171 and the first plate heat exchanger 161,
The circulation temperature of the geothermal circulation through the first plate heat exchanger 161 is lowered,
A Geothermal Heat Source Compensated Geothermal System Using a Reservoir Tank and a Geothermal Source.
The method according to claim 1,
When supplying heat to the consumer from the buffer tank 130 through heat exchange between the buffer tank 130 and the heat pump 140,
The geothermal heat source from the geothermal heat exchanger 120 is returned to the underground heat exchanger 120 via the heat pump 140 and the first plate heat exchanger 161,
The water stored in the reservoir tank 110 is returned to the reservoir tank 110 through the heat source compensation pump 171 and the first plate heat exchanger 161,
The circulation temperature of the geothermal circulation through the first plate-type heat exchanger 161 becomes higher, and the return to the underground heat exchanger 120,
A Geothermal Heat Source Compensated Geothermal System Using a Reservoir Tank and a Geothermal Source.
The method according to claim 1,
The operation of the heat pump 140 is stopped during the season,
The load side fluid in the buffer tank 130 circulates through the second plate type heat exchanger 166,
The water supply from the reservoir tank 110 is circulated through the first plate heat exchanger 161 and the second plate heat exchanger 166,
The geothermal heat source from the geothermal heat exchanger (120) is heat exchanged only through the first plate heat exchanger (161) without heat exchange through the heat pump (140)
A Geothermal Heat Source Compensated Geothermal System Using a Reservoir Tank and a Geothermal Source.
The method according to claim 1,
When there is a hot water supply demanding place during a hot period or a cooling operation,
The geothermal heat source from the geothermal heat exchanger 120 is returned to the underground heat exchanger 120 via the heat pump 140 and the first plate heat exchanger 161,
The water supply from the hot water supply compensation tank 150 is returned to the hot water supply compensation tank 150 via the heat source compensation pump 171 and the first plate heat exchanger 161,
The first plate heat exchanger 161 exchanges heat between the geothermal heat source from the heat pump 140 and the water supplied from the hot water compensation tank 150 to return the water to the hot water compensation tank 150 And the heat in the submerged heat exchanger (120) is supplied to the hot water supply compensating tank (150) side,
A Geothermal Heat Source Compensated Geothermal System Using a Reservoir Tank and a Geothermal Source.
KR1020150050362A 2015-04-09 2015-04-09 Geothermal system for heatsource compensation using water storage tank and geothermal source KR101655664B1 (en)

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