KR20130091806A - Cogeneration system using heat pump - Google Patents

Cogeneration system using heat pump Download PDF

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Publication number
KR20130091806A
KR20130091806A KR1020120013017A KR20120013017A KR20130091806A KR 20130091806 A KR20130091806 A KR 20130091806A KR 1020120013017 A KR1020120013017 A KR 1020120013017A KR 20120013017 A KR20120013017 A KR 20120013017A KR 20130091806 A KR20130091806 A KR 20130091806A
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South Korea
Prior art keywords
heat
steam
gas turbine
refrigerant
turbine
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KR1020120013017A
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Korean (ko)
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KR101320593B1 (en
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이원호
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지에스파워주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
    • F22B1/1815—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines using the exhaust gases of gas-turbines
    • 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
    • F25B30/04—Heat pumps of the sorption type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

PURPOSE: A cogeneration system using a heat pump is provided to recover loss heat existing in the same with the heat pump and to utilize the heat for producing energy, thereby reducing the amount of fuel injected into the same. CONSTITUTION: A cogeneration system includes a gas turbine (110), a boiler (120), a steam turbine (130), a heat exchanger (140), generators (160a,160b), and a heat pump (220). The gas turbine is operated by combustion gas from the combustion of fuel. The boiler recovers the heat of exhaust gas from generation in operating the gas turbine, and generates steam. The steam turbine is operated by the high temperature and high pressure steam from the boiler. The heat exchanger recovers the heat of the steam from the steam turbine, and heats district heating water for a demanding place. The generators generate electricity with the rotating operation of the gas turbine or the steam turbine. The heat pump recovers the heat from a coolant passing through the cooling load of the gas turbine, the boiler, the steam turbine, the heat exchanger, or the generators, and feeds the heat to the district heating water.

Description

Cogeneration system using heat pump {Cogeneration system using heat pump}

The present invention relates to a cogeneration system using a heat pump, and more particularly, in winter, by recovering the lost heat existing in the equipment of the power generation system and using it for energy production, as well as increasing the power generation efficiency and plant efficiency, The present invention relates to a cogeneration system that can reduce the use of greenhouse gas emissions and improve the output of the gas turbine by cooling the incoming air of the gas turbine by utilizing the heat released in summer.

In general, power generation is based on the type of prime mover, which is based on power generation using boilers and steam turbines, internal combustion power generation using internal combustion engines such as diesel engines, gas turbine generation using gas turbines, and combinations of gas turbines and steam turbines. It is classified into combined power generation.

Energy generation refers to a method of generating electricity by turning steam turbines using steam boiled with water. It produces electricity by burning water at high temperature and high pressure by burning fuel such as petroleum or coal or nuclear energy and then rotating a steam turbine to drive a coaxially connected generator. The steam passed through the steam turbine is condensed and cooled in the condenser and then transferred back to the feedwater tank and recycled to the boiler by a pump. The basic thermodynamic cycle of power generation is based on the Rankine cycle and is operated with reheat and regeneration steps to increase the efficiency of the entire cycle.

Internal combustion power generation using an internal combustion engine is a power generation method in which a fuel is exploded or burned in a cylinder in an engine such as an automobile engine, and then a generator is driven by directly rotating a crankshaft with a force expanded by a gas generated therein. The gas from the combustor rotates the gas turbine and is generated by a generator connected to the gas turbine. The basic thermodynamic cycle of gas turbine power generation is based on the Brayton cycle. In recent years, a combined cycle of gas turbines and steam turbines has been developed for the purpose of improving thermal efficiency.

Combined power generation refers to a combination of the Brayton cycle of gas turbine power generation and the Rankine cycle using steam turbines. After generating gas by turning gas turbine using fuel such as LNG or diesel, hot gas turbine exhaust gas is passed through heat recovery steam generator (HRSG) to produce steam. It is to generate steam by turning the steam turbine by secondary.

In addition, cogeneration has been developed to supply district heating heat, hot water supply or industrial process heat, that is, simultaneously supplying thermal energy and electric energy, using steam emitted from a boiler or steam turbine as a heat source. Such cogeneration reduces the burden of large-scale power plant construction compared to general power plants with high transmission loss due to transmission at remote locations, and is a distributed power supply that directly supplies electricity from energy demand sources such as electricity, so that the transmission loss is short and can immediately respond to energy demand. It is one of high efficiency energy technology that recovers waste heat which is inevitably generated in the process of generating electricity and generating electricity by receiving fuel.

The cogeneration system for this purpose is a comprehensive energy system that produces power and heat, which are secondary energy from one primary energy source, and can save 30-40% of energy such as power and fuel than the previous generation method. Because of its effectiveness, the demand is exploding in apartment houses, apartment buildings, business buildings, and small and medium industrial complexes. In particular, a gas turbine cogeneration system using a turbine as a fuel source of gas such as liquefied natural gas has the advantages of being environmentally friendly, capable of seasonal demand management, and continuous operation for 24 hours.

1 shows an example of a gas turbine cogeneration system among the various power generation methods described above.

The gas turbine cogeneration system 100 illustrated in FIG. 1 includes a gas turbine 110 driven by combustion gas generated during combustion of a fuel, and heat generated by exhaust gas generated by driving the gas turbine 110. The boiler 120 to recover and generate steam, the steam turbine 130 driven by using the high temperature and high pressure steam generated by the boiler 120, and recovers the heat of the steam discharged from the steam turbine 130 to the demand destination ( Heat exchanger (140a, 140b) for heating the district heating water to be supplied to 150, generators (160a, 160b) for generating electricity by rotational drive of the gas turbine 110 or steam turbine 130, these generators 160a , And a power system 180 that transmits or distributes power by adjusting a voltage of electricity generated in 160b.

The gas turbine 110 is mainly composed of an air compressor 111, a combustor 112, and a turbine 113. When the air compressed at high pressure enters the combustor 112 from the air compressor 111 that is started by a separate power source. In the combustor 112, the fuel is ignited while being injected, and the high-pressure combustion gas generated at this time hits the rotary blades of the turbine 113 so that the rotary blades rotate by the reaction.

Accordingly, in the gas turbine 110, the rotary blade is rotated about the rotating shaft by the high-pressure combustion gas supplied continuously, the rotational force applied to the rotating shaft to the generator 160a directly connected to the gas turbine 110. Delivered. As fuel, liquefied natural gas or liquefied petroleum gas may be used.

The generator 160a generates a predetermined electric energy (eg, direct current power or alternating current power) by using the rotational force transmitted from the gas turbine 110 and transmits the generated electric energy to the power system 180.

The exhaust gas of the gas turbine 110 flows directly into a heat recovery boiler 120 (commonly referred to as a heat recovery steam generator (HRSG)). The boiler 120 is a boiler having a pressure stage of two to three stages in order to maximize the recovery of heat, a high pressure steam drum, a low pressure steam drum, a high pressure superheater, a reheater, a high pressure used to help the generation of steam It may include an evaporator, an autoclave, a low pressure superheater, a low pressure evaporator, a low pressure coal firer, and the like. In the boiler 120, the exhaust gas from the gas turbine 110 is used to generate steam to be used to power the steam turbine 130, and the high temperature and high pressure steam generated by the boiler 120 is used for power generation. It passes through the steam turbine 130.

Hot steam or hot water generated by the boiler 120 may be used to heat the fuel supplied to the combustor 112 of the gas turbine 110 to increase the efficiency of the gas turbine 110. To this end, a preheating heat exchanger 114 is additionally provided on the fuel supply line, and hot steam or high temperature water generated from the boiler 120 acts as a heating medium to supply fuel to the preheating heat exchanger 114. After heating, it is sent to a water tank 190 to be described later.

Steam turbine 130 is provided with a high-pressure turbine 131 having a plurality of rotary blades located on the flow path for the steam supplied from the boiler 120, the high temperature and high pressure steam made in the boiler 120 in the nozzle When the steam flow is accelerated by blowing and expanding to impinge on the rotor blades, the rotor blades rotate by the reaction.

Accordingly, in the steam turbine 130, the rotary blade is rotated about the rotary shaft by the high-pressure steam supplied continuously, and transfers the rotational force applied to the rotary shaft to the generator 160b directly connected to the steam turbine 130. do.

The generator 160b generates predetermined electrical energy using the rotational force transmitted from the steam turbine 130 and transmits the electric energy to the power system 180, similarly to the generator 160a connected to the gas turbine 110.

Steam discharged from the steam turbine 130 enters the shell side of the heat exchangers 140a and 140b installed in series, and district heating water enters the tube side. Inside the heat exchangers 140a and 140b, heat energy of steam is moved to district heating water so that the district heating water is heated and the steam is condensed. The heated district heating water is supplied to the demand source 150 to heat the heating water or the hot water and return to the heat exchangers 140a and 140b after the temperature is lowered, whereby the district heating water circulates in a closed circuit.

After the steam is condensed into water, the water is collected in the water supply tank 190, and is returned to the heat recovery boiler 120 at a predetermined pressure by the pump 191.

In addition, the steam turbine 130 may include a low pressure turbine 132 having the same rotation axis as the high pressure turbine 131, and a condenser 133 for condensing steam to form water (plural). In this case, the steam passing through the high-pressure turbine 131 again rotates the low-pressure turbine 132 to drive the generator 160b coaxially connected, thereby increasing the output of the steam turbine 130. The steam passing through the low pressure turbine 132 is condensed in the condenser 133 to be a plurality, and the plurality is sent to the water supply tank 190.

On the other hand, for example, a device such as a bearing for supporting the rotary shaft of each turbine is maintained at an appropriate temperature through mutual heat exchange by a separate cooling water pipe. The cooling water pipe is filled with cooling water, and has a structure in which the cooling water is cooled and circulated again through a cooling device (not shown) provided with a fan.

However, in the conventional cogeneration system 100, the cooling water passing through various devices inevitably obtains a certain amount of heat during the heat exchange process, and the waste heat thus obtained is not used and is immediately discharged to the outside atmosphere through the cooling device. There is a problem that power generation efficiency and plant efficiency are not maximized.

In addition, in summer, when the atmospheric temperature rises, the temperature of the air flowing into the gas turbine 110 is increased to increase the volume, thereby reducing the absolute amount of air flowing into the combustor 112 and compressing the air. Since more energy is consumed, there is a problem that the efficiency and output of the gas turbine 110 is reduced in the end.

Accordingly, the present invention, by recovering the heat lost in the equipment of the power generation system in the winter season to utilize the energy production to increase the power generation efficiency and plant efficiency, as well as reduce the use of fuel to reduce greenhouse gas emissions, summer The purpose of the present invention is to provide a cogeneration system that can improve the output of the gas turbine by cooling the incoming air of the gas turbine by utilizing the heat emitted.

Cogeneration system according to an aspect of the present invention, a gas turbine driven by the combustion gas generated during the combustion of the fuel, a boiler for generating steam by recovering the heat of the exhaust gas generated by the power generation by driving the gas turbine, A steam turbine driven by using the high temperature and high pressure steam generated by the boiler, a heat exchanger for recovering heat of the steam discharged from the steam turbine and heating the district heating water to be supplied to the demand destination, the gas turbine or the steam turbine It characterized in that it comprises a generator for generating electricity by rotational drive, a heat pump for recovering heat with the cooling water passing through the cooling load to supply heat to the district heating water.

In addition, the cogeneration system according to another aspect of the present invention, the gas turbine driven by the combustion gas generated during the combustion of the fuel, to recover the heat of the exhaust gas generated during power generation by driving the gas turbine to generate steam A boiler, a steam turbine driven by using high temperature and high pressure steam generated by the boiler, a heat exchanger that recovers heat of steam discharged from the steam turbine and heats district heating water to be supplied to a demand destination, the gas turbine or the steam A generator that generates electricity by the rotational drive of the turbine, an air cooling heat exchanger for cooling the air drawn into the gas turbine, a heat pump connected to the air cooling heat exchanger to deliver a refrigerant, and connected to the heat pump to circulate It characterized in that it comprises a cooling tower for radiating heat through water.

As described above, according to the present invention, by providing a heat pump for recovering lost heat remaining in the cogeneration system, and utilizing the recovered heat for energy production, the amount of fuel input to the power generation system can be reduced, so that the generation efficiency And there is an effect that the plant efficiency is increased.

In addition, according to the present invention, there is an effect that the output of the gas turbine can be improved by cooling the incoming air of the gas turbine by utilizing the heat released in the summer.

1 is a configuration diagram showing an example of a conventional gas turbine cogeneration system.
2 is a configuration diagram showing a power generation system according to a first embodiment of the present invention.
3 is a view showing in more detail the heat pump shown in FIG.
4 is a configuration diagram showing a power generation system according to a second embodiment of the present invention.
5 is a view showing in more detail the heat pump shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

2 is a configuration diagram showing a power generation system according to a first embodiment of the present invention.

The cogeneration system 200 according to the first embodiment of the present invention includes a gas turbine 110 driven by combustion gas generated when combustion of fuel, and exhaust gas generated while driving the gas turbine 110 to generate power. Recovering the heat of the boiler 120 to generate steam, the steam turbine 130 driven by using the high temperature and high pressure steam generated in the boiler 120, the heat of the steam discharged from the steam turbine 130 is recovered Heat generator 140 for heating the district heating water to be supplied to the demand source 150, the generator 160a, 160b for generating electricity by the rotational drive of the gas turbine 110 or steam turbine 130, these generators ( It includes a power system 180 for transmitting or distributing power by adjusting the voltage of the electricity generated in 160a, 160b.

The cogeneration system 200 according to the first embodiment of the present invention further includes a heat pump 220 to which a coolant pipe 210 extending from a cooling load 300 of each device is connected.

As shown in FIG. 3, the heat pump 220 is composed of an evaporator 221, an absorber 223, a regenerator 226, a condenser 228, and a solution heat exchanger 225. A refrigerant is contained in the refrigerant, which absorbs or releases heat while undergoing evaporation, absorption, regeneration, and condensation.

In the heat pump 220, the cooling water discharged from the cooling load 300 of the device, that is, the heating medium, is supplied to the evaporator 221 of the heat pump.

The evaporator 221, for example, by absorbing heat from the cooling water pipe 210 for transporting a heating medium having a temperature of about 30 ~ 40 ° C to evaporate the refrigerant to make a low-temperature refrigerant vapor.

The refrigerant vapor evaporated in the evaporator 221 flows into the absorber 223 from the evaporator 221 through the steam supply pipe 222 and is absorbed in the solution composed of water and lithium bromide in the absorber 223.

A solution heat exchanger 225 is installed between the absorber 223 and the regenerator 226. The low-temperature thin solution coming from the absorber 223 supplied with the refrigerant vapor passes through the pipe 224 by the pump 229. After passing through the solution heat exchanger 225 and supplied to the regenerator 226, heat is supplied from the steam pipe 230 that transfers the additional steam, heat is supplied to the concentrated solution in which the high-temperature refrigerant vapor is separated. It moves to the absorber 223 via the solution heat exchanger 225 through.

The steam introduced through the steam pipe 230 proceeds to the water tank 190 after heat exchange in the regenerator 226.

The high temperature refrigerant vapor separated from the solution by the heat source introduced by the steam pipe 230 in the regenerator 226 is sent to the condenser 228 through the steam supply pipe 222.

For example, the district heating water of about 55 ° C. is heat-exchanged with the refrigerant vapor supplied from the evaporator 221 while passing through the absorber 223 through the circulating water pipe 250, and is heated first. Secondary heating is performed by the high temperature refrigerant vapor generated from the regenerator 226 while passing through the condenser 228 to obtain high temperature district heating water, for example, about 85 ° C.

Meanwhile, the generated high temperature refrigerant vapor is condensed in the condenser 228 and then sent to the evaporator 221 through the pipe 227 again to take heat from the evaporator 221 to the pipe of the heating medium, that is, the cooling water pipe 210. Evaporate.

The waste heat of each device is passed through the heat pump 220 to be recollected with the refrigerant, and the district heating water is heated by heating and condensing the refrigerant, absorbing and separating the solution, and reheating the heat exchanger 140. It is possible to reduce the amount of heat input to the boiler 120 to heat the district heating water to be supplied to the demand destination 150 in advance, and as a result can reduce the amount of fuel used, the heat output that can be supplied to the whole system It can be increased. Of course, the district heating water heated via the heat pump 220 without direct reheating in the heat exchanger 140 may be directly supplied to the demand destination 150 to heat the heating water or the hot water supply.

4 is a configuration diagram showing a power generation system according to a second embodiment of the present invention.

The cogeneration system 300 according to the second embodiment of the present invention includes a gas turbine 110 driven by combustion gas generated when combustion of fuel and an exhaust gas generated while driving the gas turbine 110 to generate electricity. Recovering the heat of the boiler 120 to generate steam, the steam turbine 130 driven by using the high temperature and high pressure steam generated in the boiler 120, the heat of the steam discharged from the steam turbine 130 is recovered Heat generator 140 for heating the district heating water to be supplied to the demand source 150, the generator 160a, 160b for generating electricity by the rotational drive of the gas turbine 110 or steam turbine 130, these generators ( It includes a power system 180 for transmitting or distributing power by adjusting the voltage of the electricity generated in 160a, 160b.

Cogeneration system 300 according to the second embodiment of the present invention, the air cooling heat exchanger 330 for cooling the air introduced into the gas turbine 110, the air cooling heat exchanger 330 is connected to the refrigerant It is further provided with a heat pump 220 for transmitting the cooling tower 320 is connected to the heat pump 220 to radiate heat through the circulating water.

As shown in FIG. 5, the heat pump 220 includes an evaporator 221, an absorber 223, a regenerator 226, a condenser 228, and a solution heat exchanger 225. A refrigerant is contained in the refrigerant, which absorbs or releases heat while undergoing evaporation, absorption, regeneration, and condensation.

In the heat pump 220, the air is cooled and heat exchange is performed, and the fluid discharged from the air cooling heat exchanger 330, that is, the heating medium, is supplied to the evaporator 221 of the heat pump.

The evaporator 221, for example, absorbs heat from the conduit for transporting a heating medium having a temperature of about 10 to 15 ° C. to evaporate the refrigerant, thereby making refrigerant vapor of low temperature.

The refrigerant vapor evaporated in the evaporator 221 flows into the absorber 223 from the evaporator 221 through the steam supply pipe 222 and is absorbed in the solution composed of water and lithium bromide in the absorber 223.

A solution heat exchanger 225 is installed between the absorber 223 and the regenerator 226. The low-temperature thin solution coming from the absorber 223 supplied with the refrigerant vapor passes through the pipe 224 by the pump 229. After passing through the solution heat exchanger 225 and supplied to the regenerator 226, heat is supplied from the steam pipe 230 that transfers the additional steam, heat is supplied to the concentrated solution in which the high-temperature refrigerant vapor is separated. It moves to the absorber 223 via the solution heat exchanger 225 through.

When the heating load is insufficient during the summer, a large amount of heat is released from the steam turbine 130, the steam is introduced into the heat pump 220 through the steam pipe 230 in order to utilize the discharge heat. The steam introduced through the steam pipe 230 proceeds to the water tank 190 after heat exchange in the regenerator 226.

The high temperature refrigerant vapor separated from the solution by the heat source introduced by the steam pipe 230 in the regenerator 226 is sent to the condenser 228 through the steam supply pipe 222.

For example, the circulating water of about 30 ° C. is heat-exchanged with the refrigerant vapor supplied from the evaporator 221 while passing through the absorber 223 through the circulating water pipe 310, and is primarily heated. 228 is secondarily heated by a high temperature refrigerant vapor generated from the regenerator 226 to be a circulating water having a temperature of about 37 ° C., and then returned to the cooling tower 320.

Meanwhile, the generated high temperature refrigerant vapor is condensed in the condenser 228 and then sent back to the evaporator 221 through the pipe 227 to take heat from the pipeline of the heating medium in the evaporator 221 to evaporate and at the same time the fluid in the pipeline. To cool. Subsequently, the fluid (refrigerant) cooled to about 7 ° C. is heat-exchanged with approximately 30 to 40 ° C. of air introduced into the air cooling heat exchanger 330 to cool the air to about 10 to 17 ° C.

As a result, the output of the gas turbine can be improved by cooling the incoming air of the gas turbine 110 by utilizing the heat released in summer. When the temperature of the air flowing into the gas turbine is high, the volume of the air increases, thereby decreasing the absolute amount of air flowing into the combustor 112, and at the same time, excessive energy is used to compress the air, thereby reducing the efficiency and output of the gas turbine. In the present invention, since the air drawn into the gas turbine 110 is cooled through the air cooling heat exchanger 330 and the heat pump 220, the efficiency and output reduction of the gas turbine due to the increase in the atmospheric temperature in summer It can be prevented.

The above description is merely illustrative of the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential features of the present invention. Therefore, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the same scope should be interpreted as being included in the scope of the present invention.

110 gas turbine 120 boiler
130: steam turbine 140: heat exchanger
150: demand source 160a, 160b: generator
180: power system 190: water tank
210: cooling water pipe 220: heat pump
230: steam pipe 250: circulating water pipe
300: cooling load 310: circulating water piping
320: cooling tower 330: air cooling heat exchanger

Claims (11)

A gas turbine driven by combustion gas generated during combustion of fuel;
A boiler which generates steam by recovering heat of exhaust gas generated while generating power by driving the gas turbine;
A steam turbine driven by the high temperature and high pressure steam generated by the boiler;
A heat exchanger that recovers heat of steam discharged from the steam turbine and heats district heating water to be supplied to a demand destination;
A generator for generating electricity by rotating the gas turbine or the steam turbine; And
Heat pump for recovering heat with the cooling water passing through the cooling load of the gas turbine, boiler, steam turbine, heat exchanger or generator to supply heat to the district heating water
Cogeneration system comprising a. The method of claim 1,
The heat pump includes:
Cogeneration system characterized in that it is connected to the cooling water pipe extending from the cooling load. The method of claim 2,
The heat pump includes:
An evaporator that absorbs heat from the cooling water pipe through a refrigerant and evaporates the refrigerant;
An absorber for absorbing the refrigerant evaporated in the evaporator into the solution;
A pump for pressurizing the solution in which the refrigerant from the absorber is absorbed;
A regenerator separating the refrigerant from the solution flowing from the pump in a vapor state; And
A condenser for liquefying the refrigerant in the vapor state flowing from the regenerator
Cogeneration system comprising a. The method of claim 3,
Cogeneration system characterized in that it further comprises a circulating water pipe installed through the absorber and the condenser. 5. The method of claim 4,
The circulating water moving through the circulating water pipe is primarily heated in the absorber and secondly heated in the condenser. A gas turbine driven by combustion gas generated during combustion of fuel;
A boiler which generates steam by recovering heat of exhaust gas generated while generating power by driving the gas turbine;
A steam turbine driven by the high temperature and high pressure steam generated by the boiler;
A heat exchanger that recovers heat of steam discharged from the steam turbine and heats district heating water to be supplied to a demand destination;
A generator for generating electricity by rotating the gas turbine or the steam turbine;
An air cooling heat exchanger for cooling the air introduced into the gas turbine; And
Heat pump for cooling the heating medium discharged from the air cooling heat exchanger
Cogeneration system comprising a. The method according to claim 6,
The heat pump includes:
Cogeneration system characterized in that it is connected to the pipe extending from the air cooling heat exchanger. The method of claim 7, wherein
The heat pump includes:
An evaporator that absorbs heat from a pipe extending from the air cooling heat exchanger through a refrigerant to evaporate the refrigerant;
An absorber for absorbing the refrigerant evaporated in the evaporator into the solution;
A pump for pressurizing the solution in which the refrigerant from the absorber is absorbed;
A regenerator separating the refrigerant from the solution flowing from the pump in a vapor state; And
A condenser for liquefying the refrigerant in the vapor state flowing from the regenerator
Cogeneration system comprising a. 9. The method of claim 8,
Cogeneration system characterized in that it further comprises a circulating water pipe installed through the absorber and the condenser. 9. The method of claim 8,
A cooling tower is installed outside the heat pump, and the circulating water pipe is connected to the cooling tower. The method of claim 10,
The circulating water moving through the circulating water pipe is firstly heated in the absorber, secondly heated in the condenser, and cooled in the cooling tower.
KR1020120013017A 2012-02-08 2012-02-08 Cogeneration system using heat pump KR101320593B1 (en)

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KR101320593B1 KR101320593B1 (en) 2013-10-23

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WO2016110124A1 (en) * 2015-01-08 2016-07-14 清华大学 Gas steam combined cycle central heating device and heating method
GB2544473A (en) * 2015-11-16 2017-05-24 Projective Ltd Combined heat and power system
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KR101936327B1 (en) * 2018-03-16 2019-04-03 한국전력기술 주식회사 Combined Heat and power system using supercritical carbon dioxide power cycle
CN109631391A (en) * 2019-01-16 2019-04-16 浙江力巨热能设备有限公司 Twin-stage absorption heat pump built in a kind of boiler
KR20190044018A (en) * 2017-10-19 2019-04-29 두산 스코다 파워 에스.알.오. Steam-recycling system for a low pressure steam turbine
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KR101592765B1 (en) * 2014-09-25 2016-02-11 현대중공업 주식회사 Combined cycle power generation system
KR101592766B1 (en) * 2014-09-25 2016-02-11 현대중공업 주식회사 Combined cycle power generation system
US10315125B2 (en) 2014-12-30 2019-06-11 Cj 4Dplex Co., Ltd. Motion chair and motion chair control system
WO2016110124A1 (en) * 2015-01-08 2016-07-14 清华大学 Gas steam combined cycle central heating device and heating method
US10823015B2 (en) 2015-01-08 2020-11-03 Tsinghua University Gas-steam combined cycle centralized heat supply device and heat supply method
GB2544473A (en) * 2015-11-16 2017-05-24 Projective Ltd Combined heat and power system
CN107191907A (en) * 2017-07-25 2017-09-22 刘绍允 Increase production gas turbine electricity/steam co-producing system of steam using smoke discharging residual heat
KR20190044018A (en) * 2017-10-19 2019-04-29 두산 스코다 파워 에스.알.오. Steam-recycling system for a low pressure steam turbine
KR101936327B1 (en) * 2018-03-16 2019-04-03 한국전력기술 주식회사 Combined Heat and power system using supercritical carbon dioxide power cycle
CN109631391A (en) * 2019-01-16 2019-04-16 浙江力巨热能设备有限公司 Twin-stage absorption heat pump built in a kind of boiler
CN109631391B (en) * 2019-01-16 2023-09-12 浙江力巨热能设备有限公司 Built-in doublestage absorption heat pump of boiler
KR20220078338A (en) * 2020-12-03 2022-06-10 한국전력공사 Hanger and power plant having the same

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