KR20160068629A - Gas heat pump system using water cooling - Google Patents

Gas heat pump system using water cooling Download PDF

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Publication number
KR20160068629A
KR20160068629A KR1020150070005A KR20150070005A KR20160068629A KR 20160068629 A KR20160068629 A KR 20160068629A KR 1020150070005 A KR1020150070005 A KR 1020150070005A KR 20150070005 A KR20150070005 A KR 20150070005A KR 20160068629 A KR20160068629 A KR 20160068629A
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KR
South Korea
Prior art keywords
heat exchanger
refrigerant
compressor
geothermal
gas
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KR1020150070005A
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Korean (ko)
Inventor
원승연
Original Assignee
유한회사 지에이시스템
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Publication of KR20160068629A publication Critical patent/KR20160068629A/en

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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
    • 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
    • F25B41/046—
    • F25B41/062—
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • 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)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

A gas heat pump system according to the present invention includes an outdoor unit (100) and an indoor unit (200), the gas heat pump system comprising: a gas engine; A compressor (110) for circulating the refrigerant while being driven by the gas engine; A four-way valve (120) connected to the compressor (110) and controlling the refrigerant to pass therethrough; An outdoor heat exchanger (130) connected to the four-way valve (120); A geothermal circulation pump 140 connected to the outdoor heat exchanger 130 for circulating the geothermal circulation; An expansion valve (150) disposed on the pipeline between the outdoor unit heat exchanger (130) and the indoor unit (200); And a liquid separator 160 disposed on a pipe between the four-way valve 120 and the compressor 110. The outdoor heat exchanger 130 is in the form of a cell and a tube.

Description

[0001] GAS HEAT PUMP SYSTEM USING WATER COOLING [0002]

The present invention relates to a water-cooled gas engine heat pump.

Generally, a gas heat pump system is a device for heating or cooling a compressor by operating a driving force of a gas engine. As shown in Fig. 1, a refrigerant circulation system 1 and an engine cooling water circulation system 2 .

The refrigerant circulation system forms a refrigeration cycle or a heat pump cycle for cooling or heating the indoor side and includes a refrigerant compressor 14, a four-way valve 15, an outdoor heat exchanger 16 driven by a gas engine 10, A heating expansion valve 17, an indoor expansion valve 18, an indoor heat exchanger 19, an accumulator 20, and the like.

The engine cooling water circulation system 2 circulates engine cooling water to cool the engine 10 and includes an engine cooling water three-way valve 21, a radiator 22, an engine cooling water circulation pump 23, an exhaust gas heat exchanger 24, .

An auxiliary heat exchanger (25) is provided between the refrigerant circulation system (1) and the engine cooling water circulation system (2) to exchange heat between the refrigerant and the engine cooling water, thereby evaporating the refrigerant.

In the cooling operation of the conventional gas engine cooling / heating apparatus, the four-way valve 15 is switched as shown by the solid arrow in FIG. 1, and is compressed by the compressor 14 driven by the gas engine 10, The refrigerant in a high pressure state is condensed in the outdoor unit heat exchanger 16 functioning as a condenser through the four-way valve 15 switched to the cooling operation mode and discharges the condensation heat to the outside air. The condensed liquid refrigerant is depressurized by the indoor expansion valve (18), and then flows into the indoor heat exchanger (19) functioning as an evaporator in a state of low temperature and low pressure to be evaporated. As described above, the cooling is achieved by absorbing the latent heat required in the evaporation process from the air in the room.

On the other hand, the refrigerant passing through the indoor unit heat exchanger (19) is sucked into the compressor only in the gaseous state via the accumulator (20), so that the refrigeration cycle is continuously formed.

In cooling operation, the engine cooling water that has cooled the gas engine 10 is guided to the radiator 22 side by the engine cooling water three-way valve 21 and radiated to the outside air by the radiator 22, And then returned to the gas engine 10 via the exhaust gas heat exchanger 24.

In the heating operation, however, the four-way valve 15 is switched as indicated by the dotted arrow in Fig. 1, whereby the refrigerant of high temperature and high pressure compressed by the compressor 14 flows into the indoor unit 36 side, Is condensed in the heat exchanger (19), and is heated by the condensation heat released into the room air. The condensed liquid refrigerant passes through the heating expansion valve 17 and is decompressed to a low temperature and low pressure state, and then flows into the outdoor heat exchanger 16 functioning as an evaporator and starts to evaporate.

On the other hand, in the winter when the heating operation is performed, since the temperature of the outside air is generally low, the power required for the compressor increases to lower the evaporation temperature, thereby deteriorating the performance of the heat pump cycle. It is used as the heat source of evaporation of refrigerant. That is, during the heating operation, the engine cooling water that has cooled the gas engine 10 is guided to the auxiliary heat exchanger 25 side by the engine cooling water three-way valve 21, passes through the outdoor unit heat exchanger 16, And evaporates the refrigerant.

Thus, the refrigerant vaporized by sequentially passing through the outdoor heat exchanger 16 and the auxiliary heat exchanger 25 is sucked into the compressor 14 through the accumulator 20, and the heat pump cycle is continuously formed do.

The conventional refrigerant circulation system 1 shown in Fig. 1 is designed so that the refrigerant always flows through the auxiliary heat exchanger 25 during the heating operation as well as during the cooling operation in which it is not necessary to heat the refrigerant in the auxiliary heat exchanger 25, (14). When the refrigerant passes through the heat exchanger such as the auxiliary heat exchanger 25, pressure loss is inevitably generated, so that the suction pressure is lowered and the refrigerant sucked into the compressor 14 becomes larger. When the refrigerant becomes larger, When the volumetric flow rate is constant at the number of revolutions, the refrigerant circulation amount decreases and the cooling capacity decreases. Therefore, in order to maintain the cooling capacity, the number of revolutions of the compressor must be increased to secure the refrigerant circulation amount. Therefore, an increase in the number of revolutions of the compressor means an increase in the power of the compressor, thus causing a problem that the coefficient of performance is lowered.

Since the refrigerant sucked into the compressor must be sucked into the gaseous state in order to increase the reliability of the compressor, only the gaseous refrigerant should be sucked into the compressor by installing the accumulator, but due to an abnormal phenomenon such as a sudden change in the room load, There is a problem that the risk of the liquid refrigerant flowing into the compressor increases.

Basically, the conventional gas heat pump system uses an air heat source. In the summer, the air temperature rises by about 30 degrees or more, and in winter, the temperature distribution falls to a minimum of -10 degrees or less. Therefore, it is difficult to obtain a stable heat source, and since the temperature difference of the heat source to be used in the system is not large, a large amount of heat source to be obtained is not obtained, so that system performance is difficult to be improved.

Further, since it is a gas engine type, it is necessary to use a radiator, which increases the required parts, thereby complicating the system.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a more efficient system using a geothermal source that can be secured as a stable heat source by changing the existing air cooling type to water cooling type.

According to an aspect of the present invention, there is provided a gas heat pump system including an outdoor unit (100) and an indoor unit (200), the gas heat pump system comprising: a gas engine; A compressor (110) for circulating the refrigerant while being driven by the gas engine; A four-way valve (120) connected to the compressor (110) and controlling the refrigerant to pass therethrough; An outdoor heat exchanger (130) connected to the four-way valve (120); A geothermal circulation pump 140 connected to the outdoor heat exchanger 130 for circulating the geothermal circulation; An expansion valve (150) disposed on the pipeline between the outdoor unit heat exchanger (130) and the indoor unit (200); And a liquid separator 160 disposed on a pipe between the four-way valve 120 and the compressor 110. The outdoor heat exchanger 130 is in the form of a cell and a tube.

The gas heat pump system includes a plurality of geothermal solenoid valves (141, 142) disposed on a channel between the outdoor heat exchanger (130) and the geothermal circulation pump (140).

According to the present invention as described above, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a more efficient system using a geothermal source that can be secured as a stable heat source by changing the existing air- .

The present invention can realize a high efficiency system by securing a stable heat source by using a geothermal source, and the outdoor heat exchanger can be configured as a cell-and-tube type heat exchanger to simultaneously perform a heat exchange function and a heat radiation function, It is.

1 shows a conventional gas heat pump system,
2 to 3 are water-cooled gas heat pump systems according to an 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;

2 to 3 are gas heat pump systems according to embodiments of the present invention.

The water-cooled gas heat pump system according to the present invention includes an outdoor unit (100) and an indoor unit (200).

The outdoor unit 100 includes a gas engine (not shown), a compressor 110 that circulates the refrigerant while being driven by the gas engine, a four-way valve 120 that controls the refrigerant to pass therethrough, A geothermal circulation pump 140 connected to the outdoor heat exchanger 130 to circulate a geothermal circulation therein, an expansion valve 150 disposed on a channel between the outdoor heat exchanger 130 and the indoor unit 200, And a liquid separator 160 disposed on the pipeline between the four-way valve 120 and the compressor 110.

The outdoor heat exchanger 130 functions as a condenser in the cooling process and is a cell-and-tube type heat exchanger that receives the geothermal water from the geothermal circulation pump 140 and performs heat exchange of the refrigerant.

The outdoor unit 100 includes a plurality of temperature sensors 114, 121, 124 and 125 disposed on the respective pipes, pressure switches 122 and 123 disposed in front of and behind the four-way valve 120, condenser electromagnetic valves 131 and 132 arranged on the front and rear ends of the outdoor unit heat exchanger 130, ), Condenser temperature sensors (115 and 126) disposed on the front and rear pipelines of the outdoor heat exchanger (130), and geothermal solenoid valves (141 and 142) disposed on the pipeline between the outdoor heat exchanger (130) and the geothermal circulation pump do.

On the other hand, the gas heat pump system includes a plurality of service valves 171, 172, 221, and 222 on a connection pipe connecting the outdoor unit 100 and the indoor unit 200.

The indoor unit 200 includes an indoor unit heat exchanger 210, an air temperature sensor 211, a temperature sensor 212, and a temperature sensor 213 for allowing a refrigerant passed through the expansion valve 150 to pass therethrough.

Hereinafter, referring to Fig. 2, the refrigerant and the geothermal water circulation path at the time of cooling operation by the gas heat pump system will be described.

The refrigerant gas compressed by the compressor (100) is transferred to the outdoor heat exchanger (130) by the conversion action of the four - way valve (120).

The compressed refrigerant gas is supplied to the first geothermal solenoid valve 142 of the outdoor heat exchanger 130 through the first geothermal solenoid valve 142 to receive the geothermal water at a temperature of 16 ° C. and to heat the refrigerant gas. Thus, the refrigerant gas R-410A is condensed and the geothermal water temperature is 20 ° C. 130 to the ground through the second geothermal solenoid valve 141. The geothermal water circulating to the ground through the geothermal circulation pump 140 receives the geothermal heat again and undergoes the process of lowering the temperature.

The refrigerant condensed while passing through the outdoor unit heat exchanger 130 is transferred to the indoor unit heat exchanger 210 via the expansion valve 150 and the plurality of service valves 171 and 221.

The indoor heat exchanger 210 evaporates the low temperature refrigerant to cool the room during the evaporation process. At this time, the refrigerant gas converted by the heat of the room obtained in the cooling process is supplied to the plurality of service valves 172, 222 and the liquid separator 160 to the compressor 110 via the four-way valve 120. The refrigerant passing through the indoor heat exchanger 210 is sucked into the compressor 110 through the liquid separator 160 and only the gaseous refrigerant is sucked into the compressor 110,

In the conventional general water-cooled type, heat is exchanged through cooling water of about 32 ° C, and the cooling water is circulated to the cooling tower at an outlet temperature of about 37 ° C. Meanwhile, in the present invention, geothermal water temperature is 16 ° C and heat exchange is performed at 20 ° C, so that it has high efficiency performance characteristics.

The amount of opening of the first geothermal solenoid valve 142 is variable depending on the temperature value of the condenser exit solenoid valve 132 of the condenser as the outdoor unit heat exchanger 130.

Hereinafter, referring to Fig. 3, the refrigerant and the geothermal water circulation path at the time of the heating operation of the gas heat pump system will be described.

The refrigerant gas compressed by the compressor 110 is delivered to the indoor heat exchanger 210 via the plurality of service valves 172 and 222. The refrigerant condensed in the indoor heat exchanger 210 is transferred to the outdoor heat exchanger 130 via the expansion valve 150 via the plurality of service valves 171 and 221.

The condensed refrigerant gas is supplied to the first geothermal solenoid valve 142 of the outdoor unit heat exchanger 130 via the first geothermal solenoid valve 142 to receive the geothermal water at a temperature of 16 ° C. and heat-exchanges the refrigerant gas R-410A. 130 to the ground through the second geothermal solenoid valve 141. The geothermal water circulating to the ground through the geothermal circulation pump 140 receives the geothermal heat again and undergoes the process of lowering the temperature.

The indoor heat exchanger 210 evaporates the high temperature refrigerant to heat the room during the evaporation process. The refrigerant gas converted by the heat of the room obtained in the heating process is supplied to the four-way valve 120 and the liquid separator 160, To the compressor (110). The refrigerant passing through the four-way valve 120 is sucked into the compressor 110 through the liquid separator 160 and only the gaseous refrigerant is sucked into the compressor 110, so that the heating cycle is continuously formed.

The conventional general water-cooling type circulates to such a degree that evaporation heat exchange is performed using a boiler. In the present invention, since the geothermal water temperature is 16 ° C and the heat exchange is performed at 12 ° C, it has high efficiency performance characteristics.

The amount of opening of the first geothermal solenoid valve 142 is variable according to the temperature value of the condenser inlet solenoid valve 131 of the condenser as the outdoor unit heat exchanger 130.

As described above, according to the present invention, a stable heat source can be secured by using a geothermal source, a high-efficiency system can be realized, and the outdoor unit heat exchanger can be configured as a cell-and-tube heat exchanger to simultaneously perform a heat exchange function and a heat radiation function. It can be made more compact, and consequently it can be said that it is a geothermal heat pump using geothermal energy which is renewable energy.

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 thereof should be construed as falling within the scope of the present invention.

100: outdoor unit
110: compressor
120: Four way valve
130: outdoor heat exchanger
140: Geothermal circulation pump
150: expansion valve
160: liquid separator
200: indoor unit

Claims (2)

In a gas heat pump system including an outdoor unit (100) and an indoor unit (200)
The gas heat pump system comprises:
Gas engine;
A compressor (110) for circulating the refrigerant while being driven by the gas engine;
A four-way valve (120) connected to the compressor (110) and controlling the refrigerant to pass therethrough;
An outdoor heat exchanger (130) connected to the four-way valve (120);
A geothermal circulation pump 140 connected to the outdoor heat exchanger 130 for circulating the geothermal circulation;
An expansion valve (150) disposed on the pipeline between the outdoor unit heat exchanger (130) and the indoor unit (200); And
And a liquid separator (160) disposed on a conduit between the four-way valve (120) and the compressor (110)
The outdoor heat exchanger (130) includes a heat exchanger
Gas heat pump system.
The method according to claim 1,
The gas heat pump system comprises:
And a plurality of geothermal solenoid valves (141, 142) arranged on a channel between the outdoor heat exchanger (130) and the geothermal circulation pump (140)
Gas heat pump system.

KR1020150070005A 2014-12-05 2015-05-19 Gas heat pump system using water cooling KR20160068629A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020140173664 2014-12-05
KR20140173664 2014-12-05

Publications (1)

Publication Number Publication Date
KR20160068629A true KR20160068629A (en) 2016-06-15

Family

ID=56135266

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150070005A KR20160068629A (en) 2014-12-05 2015-05-19 Gas heat pump system using water cooling

Country Status (1)

Country Link
KR (1) KR20160068629A (en)

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