CN113932472A - Operation method based on gas engine heat pump and organic Rankine cycle coupling system - Google Patents
Operation method based on gas engine heat pump and organic Rankine cycle coupling system Download PDFInfo
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- CN113932472A CN113932472A CN202010654619.XA CN202010654619A CN113932472A CN 113932472 A CN113932472 A CN 113932472A CN 202010654619 A CN202010654619 A CN 202010654619A CN 113932472 A CN113932472 A CN 113932472A
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
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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
- F25B31/00—Compressor arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/021—Cooling cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
- F02B2043/103—Natural gas, e.g. methane or LNG used as a fuel
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
An operation method based on a gas engine heat pump and an organic Rankine cycle coupling system is used for achieving efficient utilization of natural gas, improving the gradient utilization rate of energy and providing a natural gas distributed energy utilization system for users. The system is characterized by comprising a compression heat pump subsystem, a gas engine subsystem and an organic Rankine cycle subsystem. The three subsystems are mutually coupled, and the gas engine subsystem is connected with and drives a compressor of the compression type heat pump subsystem to do work through a belt so as to carry out refrigeration or heating circulation; the high-temperature flue gas generated by the gas engine subsystem drives the organic Rankine cycle subsystem to generate electricity; the waste heat of a cylinder sleeve of the gas engine subsystem and the cooling water of the condenser of the organic Rankine cycle subsystem are connected in series to supply domestic hot water.
Description
Technical Field
The invention relates to an operation method based on a gas engine heat pump and an organic Rankine cycle coupling system.
Background
At present, in the application field of gas engine heat pumps, most of the flue gas waste heat of a gas engine is used for producing domestic hot water together with cylinder jacket water, defrosting or driving an absorption refrigerating unit and the like, most of the flue gas waste heat is directly used by waste heat energy, the flue gas of the gas engine is high-grade heat energy, obviously, the utilization modes of the waste heat energy do not improve the grade of the energy, and the waste of the energy grade is caused. Therefore, a system device for improving the utilization rate of the energy cascade is needed.
The natural gas distributed energy is a modern energy supply mode which takes natural gas as fuel, realizes gradient utilization of energy through modes of combined supply of cooling, heating and power and the like, and realizes energy supply nearby a load center, and is an important mode for efficient utilization of natural gas. And has the advantages of energy conservation and emission reduction, comprehensive and graded utilization of energy, efficiency improvement and pollution reduction. Saving investment and loss of power transmission and transformation, cleanness and environmental protection. Peak clipping and valley filling are performed, the power grid and the air grid are balanced, and the safety and the stability of the power grid are enhanced. Good economical efficiency and high reliability.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides an operation method based on a gas engine heat pump and an organic Rankine cycle coupling system, which meets the combined cooling, heating and power supply requirements of users, improves the gradient utilization rate of energy and realizes the efficient utilization of natural gas.
In order to achieve the technical effects, the invention adopts the following technical scheme:
an operation method based on a gas engine heat pump and an organic Rankine cycle coupling system is characterized by being formed by mutually coupling a compression heat pump subsystem, a gas engine subsystem and the organic Rankine cycle subsystem. The gas engine subsystem is connected with the compression subsystem through a belt to drive the compressor to do work so as to carry out refrigeration or heating cycle, and high-temperature flue gas generated by the gas engine drives the organic Rankine cycle subsystem to generate electricity; the waste heat of cylinder sleeve water of the gas engine is converted by a waste heat plate and is connected in series with the cooling water of a condenser of the organic Rankine cycle subsystem to supply domestic hot water. The outlet of the gas engine cylinder liner water is connected with an electric three-way valve, a third electromagnetic valve and a cooling water pump in sequence and returns to a suction inlet of the gas engine cylinder liner water for self circulation of the gas engine cooling liquid, the outlet of the F end of the electric three-way valve is divided into two paths, one path of the path of, The flow direction and the flow rate of cylinder liner water are adjusted by opening and closing the fourth electromagnetic valve, the temperature of the cooling liquid of the gas engine is kept within a set range (70-90 ℃), and the gas engine is enabled to run efficiently and stably.
Note: the above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Drawings
FIG. 1 is a flow chart of operation of a gas engine heat pump and organic Rankine cycle coupling system in a summer mode;
FIG. 2 is a flow chart of operation of a gas engine heat pump and organic Rankine cycle coupling system in a winter mode;
in the figure, 1-a gas engine, 2-a compressor, 3-an oil separator, a 4-four-way valve, 5-a first solenoid valve, 6-a second solenoid valve, 7 a-a first layer of a finned heat exchanger, 7 b-a second layer of the finned heat exchanger, 7 c-a third layer of the finned heat exchanger, 8-a first expansion valve, 9-a first one-way valve, 10-a second expansion valve, 11-a second one-way valve, 12-a cooling liquid water tank, a bridge type one-way valve group (13-a third one-way valve, 14-a fourth one-way valve, 15-a fifth one-way valve, 16-a sixth one-way valve), 17-a seventh one-way valve, 18-a third expansion valve, 19-a liquid storage device, 20-a drying filter, 21-an electromagnetic stop valve, 22-a liquid viewing mirror, 23-a plate heat exchanger, 24-gas-liquid separator, 25-waste heat plate exchange, 26-electric three-way valve, 27-third electromagnetic valve, 28-waste heat water pump, 29-fourth electromagnetic valve, 30-eighth one-way valve, 31-evaporator, 32-expander, 33-generator, 34-heat regenerator, 35-condenser, 36-working medium pump and 37-cooling water pump.
Referring to fig. 1 to 2, it should be understood that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationships, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present disclosure.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The compression type heat pump subsystem comprises a compressor, an oil return device, a four-way valve, a plate heat exchanger, an expansion valve, a one-way valve, a liquid storage device, a drying filter, an electromagnetic stop valve, a liquid viewing mirror, a finned heat exchanger, a gas-liquid separator and the like, wherein the compressor is sequentially connected with the oil separator and the four-way valve, the outlet of the four-way valve is respectively connected with the second layer of the finned heat exchanger, the gas-liquid separator and the plate heat exchanger, the other end of the second layer of the finned heat exchanger is respectively connected with the first expansion valve, the second expansion valve, the first one-way valve, the second one-way valve and the bridge type one-way valve group, the bridge type one-way valve group is sequentially connected with the liquid storage device, the dryer and the liquid viewing mirror of the electromagnetic stop valve, the plate heat exchanger is connected with the bridge type one-way valve group through the third expansion valve and the seventh one-way valve, the port A of the four-way valve is connected with the port B during cooling operation in summer, the D port is connected with the C port, the A of the four-way valve is connected with the D port during heating operation in winter, the port B is connected with the port C.
The gas engine subsystem is composed of a gas engine cooling water pump, an electric three-way valve, an electromagnetic valve, a waste heat recovery plate exchanger, a cooling liquid water tank, a one-way valve and the like. The gas engine cylinder liner water outlet, the electric three-way valve, the third electromagnetic valve and the cooling water pump are sequentially connected and return to a suction inlet of the gas engine cylinder liner water to perform gas engine cooling liquid self-circulation, the outlet of the F end of the electric three-way valve is divided into two paths, one path of heat exchange is performed through the waste heat plate and then returns to the suction inlet of the cooling water pump to prepare domestic hot water, the other path of heat exchange is performed through the first electromagnetic valve to perform heat dissipation and defrosting on the first layer of the fin heat exchanger and then returns to a cylinder liner water inlet of the engine when the frosting condition is achieved through detection, the other path of heat exchange is performed through the second electromagnetic valve to perform heat dissipation and defrosting on the third layer of the fin heat exchanger and then returns to the cylinder liner water inlet of the gas engine through the cooling water pump when the water temperature of the engine cylinder liner is higher than a set value when frosting is detected, and defrosting is preferentially performed when the water temperature of the engine cylinder liner is higher than the set value. The flow direction and the flow rate of cylinder liner water are adjusted by adjusting the opening of the electric three-way valve and the switches of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve, and the temperature of cooling liquid of the gas engine is kept within a set range (70-90 ℃), so that the gas engine can run efficiently and stably.
The organic Rankine cycle subsystem comprises an evaporator, an expander, a generator, a heat regenerator, a condenser, a working medium pump and a cooling water pump. The connection relationship is as follows: the high-temperature high-pressure gaseous working medium enters the expansion machine from the evaporator to expand and do work to push the generator to generate power, the exhaust steam after power generation enters the condenser through the heat regenerator, is condensed into liquid working medium in the condenser, then is pressurized by the working medium pump, enters the evaporator through the heat regenerator, is heated by the gas engine smoke in the evaporator into the high-temperature high-pressure gaseous working medium, and starts the next cycle.
Summer mode of operation is illustrated in FIG. 1
When the system operates in summer, the compression heat pump subsystem performs a refrigeration cycle. The gas engine subsystem provides power for the compression heat pump subsystem, the organic Rankine cycle system is driven by high-temperature smoke, and the waste heat of water in the engine cylinder sleeve is used for producing domestic hot water and defrosting. The organic Rankine cycle subsystem generates power, the condenser cooling water of the organic Rankine cycle subsystem and the waste heat plate are connected in series for supplying domestic hot water, and the whole coupling system realizes combined supply of cold, heat and power.
In the compression heat pump subsystem part, a gas engine drives a compressor, a compressor 2 absorbs low-temperature low-pressure gaseous refrigerant and compresses the low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant, the refrigerant and the frozen oil are separated in an oil return device 3, and the frozen oil returns to the compressor through an oil return pipe. The refrigerant passes through the port A and the port B of the four-way valve, reaches the second layer 7a of the fin heat exchanger, exchanges heat with air, becomes a medium-temperature high-pressure liquid refrigerant, is converged through the first check valve 9 and the second check valve 11 respectively, reaches the bridge type check valve group, passes through the sixth check valve 16 of the bridge type check valve group, then returns to the fourth check valve 14 of the bridge type check valve group through the liquid reservoir 19, the drying filter 20, the electromagnetic stop valve 21 and the liquid sight glass 22 in sequence, is throttled at the third expansion valve 18 to become a low-temperature low-pressure liquid refrigerant, enters the plate heat exchanger 21, and the refrigerant absorbs the heat of chilled water at the plate heat exchanger 21 to become a low-temperature low-pressure gaseous refrigerant, meanwhile, the chilled water is cooled and sent to a user, reaches the gas-liquid separator 24 through the port D and the port C of the four-way valve, is subjected to gas-liquid separation, and then returns to the suction port of the compressor 2 to perform the next refrigeration cycle.
The gas engine subsystem comprises cylinder sleeve waste heat and high-temperature flue gas waste heat, the high-temperature flue gas waste heat is used as high-grade energy to drive organic Rankine cycle, in the aspect of the cylinder sleeve waste heat, a cylinder sleeve water outlet of the gas engine 1 exchanges heat through an outlet of an electric three-way valve 26 and a waste heat plate 25 to prepare domestic hot water, the domestic hot water is returned to a cylinder sleeve water suction inlet of the gas engine 1 through a fourth electromagnetic valve 29 and a waste heat water pump 28 to prepare the domestic hot water, when the temperature of the domestic hot water reaches a set value (45 ℃), a second electromagnetic valve 6 is opened, the fourth electromagnetic valve 29 is closed, the cylinder sleeve water outlet of the gas engine 1 is diffused into air through the electric three-way valve 26 and the second electromagnetic valve 6 through a third layer 7c of a fin heat exchanger, the residual heat of the gas engine 1 is returned to a cylinder sleeve water inlet of the gas engine 1 through the waste heat water pump 28, and the other part of the cylinder sleeve water is returned to the cylinder sleeve water inlet of the gas engine 1 through the electric three-way valve 26, the third electromagnetic valve 27, the electric three-way valve 27, the waste heat exchanger, The waste heat water pump 28 returns to a cylinder liner water inlet of the gas engine 1 to perform self-circulation of waste heat of the gas engine, flow is distributed by adjusting the opening of the electric three-way valve 26, and the temperature of cooling liquid of the gas engine is kept within a set range (70-90 ℃), so that the gas engine can operate efficiently and stably. When the cooling liquid is insufficient, the cylinder liner water is supplemented to the suction inlet of the residual heat water pump 28 from the cooling liquid water tank 12 through the eighth check valve 30.
In the organic Rankine cycle part, after high-temperature flue gas generated by a gas engine exchanges heat with organic working media through an evaporator 31, the high-temperature and high-pressure organic working media enter an expander 32 to expand and do work to push a generator 33 to generate power, exhaust steam after power generation enters a condenser 35 through a heat regenerator 34, is condensed into liquid working media in the condenser 35, is pressurized by a working medium pump 36, is heated by the heat regenerator 34 and then returns to the evaporator 31, and the next cycle is started. The cooling water pump 37 of the condenser 35 heats the return water of the domestic hot water through the condenser 35, and the return water is sent to the waste heat plate to exchange heat with the cylinder liner water of the engine to continue heating so as to improve the water supply temperature, and then the return water is used as the domestic hot water for users.
Winter mode of operation is shown in figure 2
During winter operation, the compression heat pump subsystem performs a heating cycle. The gas engine subsystem provides power for the compression heat pump subsystem, the high-temperature flue gas drives the organic Rankine cycle system, and the waste heat of the water of the engine cylinder sleeve can be used for producing domestic hot water and defrosting. The organic Rankine cycle subsystem generates power, and the whole coupling system realizes combined heat and power supply.
In the compression type heat pump subsystem part, a compressor 2 absorbs low-temperature low-pressure gaseous refrigerant and compresses the low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant, the refrigerant is separated from the frozen oil in an oil return device 3, and the frozen oil returns to the compressor through an oil return pipe. The refrigerant passes through the port A and the port D of the four-way valve, then reaches the plate heat exchanger 23 to exchange heat with cooling water to be changed into liquid refrigerant cooling water with medium temperature and high pressure, and is heated and supplied to a user, after the refrigerant is connected with the fifth one-way valve of the bridge one-way valve set through the seventh one-way valve, the refrigerant sequentially passes through the liquid reservoir 19, the drying filter 20, the electromagnetic stop valve 21 and the liquid viewing mirror 22, returns to the third one-way valve 13 of the bridge one-way valve set, and then is respectively throttled by the first expansion valve 8 and the second expansion valve 10 to be changed into liquid refrigerant with low temperature and low pressure, enters the second layer 7a of the fin heat exchanger to absorb heat of air to be changed into gaseous refrigerant with low temperature and low pressure, and then reaches the gas-liquid separator 24 through the port B and the port C of the four-way valve to be subjected to gas-liquid separation and then returns to the suction port of the compressor 2 to perform the next heating cycle.
The gas engine subsystem comprises cylinder sleeve waste heat and high-temperature flue gas waste heat, and the high-temperature flue gas waste heat is used as high-grade energy for driving the organic Rankine cycle. In the aspect of cylinder sleeve waste heat, a water outlet of a cylinder sleeve of the gas engine exchanges heat through a waste heat plate by an outlet of an electric three-way valve 26 to prepare domestic hot water, returns to a cylinder sleeve suction inlet of the gas engine 1 by a waste heat water pump 28 to prepare the domestic hot water, when the temperature of the domestic hot water reaches a set value, the second electromagnetic valve 6 is opened, the fourth electromagnetic valve 29 is closed, the cylinder sleeve water outlet of the gas engine 1 radiates the waste heat of the gas engine to the air through the electric three-way valve 26 and the second electromagnetic valve 6 through the third layer 7c of the fin heat exchanger, and the residual heat water is returned to a cylinder liner water inlet of the gas engine through the residual heat water pump 28, and the other part of the residual heat water is returned to the cylinder liner water inlet of the gas engine through the electric three-way valve 26, the third electromagnetic valve 27 and the residual heat water pump 28 to perform self-circulation of the residual heat of the engine, so that the temperature of the cooling liquid of the gas engine is kept within a set range (70-90 ℃), and the gas engine is enabled to operate efficiently and stably. When the outdoor environment temperature is low in winter and the fin heat exchanger reaches the set frosting condition, the first electromagnetic valve 5 and the third electromagnetic valve 27 are opened, the second electromagnetic valve 6 and the fourth electromagnetic valve 29 are closed, the cylinder liner water outlet of the gas engine is adjusted through the electric three-way valve 26, one part of the cylinder liner water is subjected to heat dissipation and defrosting on the outermost layer of the fin heat exchanger through the stop valve 5, the other part of the cylinder liner water returns to the cylinder liner water inlet of the gas engine 1 through the third electromagnetic valve 27 and the waste heat water pump 28 to perform self circulation of engine waste heat, the flow is distributed through opening adjustment of the electric three-way valve 26, the cylinder liner water of the gas engine is subjected to defrosting operation within a set range (70-90 ℃), and defrosting operation is preferentially performed when frosting is detected and the water temperature of the cylinder liner of the engine is higher than a set value. When the coolant is insufficient, the coolant tank 12 supplies the cylinder liner water to the suction port of the residual heat water pump 28 through the eighth check valve 30.
The operation mode of the organic Rankine cycle subsystem part is the same as the operation mode of the organic Rankine cycle in summer.
Claims (4)
1. The gas engine subsystem is connected with and drives a compressor of the compression heat pump subsystem to do work through a belt to perform refrigeration or heating circulation, high-temperature flue gas generated by the gas engine subsystem drives the organic Rankine cycle subsystem to generate power, and cylinder sleeve waste heat of the gas engine subsystem and cooling water of a condenser of the organic Rankine cycle subsystem are connected in series to supply domestic hot water.
2. The compression heat pump subsystem according to claim 1, which comprises a compressor, an oil scavenger, a four-way valve, a plate heat exchanger, an expansion valve, a check valve, a reservoir, a filter drier, an electromagnetic stop valve, a fluid sight glass, a fin heat exchanger, a gas-liquid separator, etc., wherein the compressor is connected with the oil separator and the four-way valve in sequence, the four-way valve is connected with the fin heat exchanger, the gas-liquid separator and a waste heat plate in sequence, the other side of the fin heat exchanger is connected with a first expansion valve, a second expansion valve, a first check valve, a second check valve and a bridge check valve group in sequence, the check valve group is connected with the reservoir, the drier and the electromagnetic stop valve fluid sight glass in sequence, the plate heat exchanger is connected with the bridge check valve group through a third expansion valve and a seventh check valve, and the compression heat pump subsystem performs cooling operation in summer and heating operation in winter.
3. The gas engine subsystem as claimed in claim 1, which comprises a gas engine cooling water pump, an electric three-way valve, an electromagnetic valve, a waste heat recovery plate exchanger, a coolant water replenishing tank, a one-way valve, etc., wherein the gas engine cylinder liner water outlet, the electric three-way valve, a third electromagnetic valve, and the cooling water pump are sequentially connected to return to the suction inlet of the gas engine cylinder liner water for self-circulation of the gas engine coolant, the outlet at the F end of the electric three-way valve is divided into two paths, one path of which is subjected to heat exchange by the waste heat plate exchanger and then returns to the suction inlet of the cooling water pump through a fourth electromagnetic valve for producing domestic hot water, the other path of which is subjected to defrosting at the first layer of the fin heat exchanger through the first electromagnetic valve when the frosting condition is detected, the other path of which is detected when the water temperature of the engine cylinder liner is higher than a set value, is subjected to heat dissipation at the third layer of the fin heat exchanger through the second electromagnetic valve when the frosting cylinder liner and the water temperature are detected at the same time to be higher than the set value, and then the cooling water returns to a cylinder liner water inlet of the gas engine through a cooling water pump, a cooling liquid water tank is connected with an eighth one-way valve to perform liquid supplementing at a cooling water pump suction inlet, the flow direction and the flow rate of the cylinder liner water are adjusted by adjusting the opening of an electric three-way valve and the opening and closing of a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, and the cylinder liner water temperature of the gas engine is kept within a set range (70-90 ℃), so that the gas engine can perform efficient and stable operation.
4. The organic Rankine cycle subsystem according to claim 1 comprises an evaporator, an expander, a generator, a regenerator, a condenser, a working medium pump and a cooling water pump; the high-temperature high-pressure gaseous working medium enters the expansion machine from the evaporator to expand and do work to push the generator to generate power, the exhaust steam after power generation enters the condenser through the heat regenerator, is condensed into liquid working medium in the condenser, then is pressurized by the working medium pump, enters the evaporator through the heat regenerator, is heated by the gas engine smoke in the evaporator into the high-temperature high-pressure gaseous working medium, and starts the next cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010654619.XA CN113932472A (en) | 2020-07-10 | 2020-07-10 | Operation method based on gas engine heat pump and organic Rankine cycle coupling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010654619.XA CN113932472A (en) | 2020-07-10 | 2020-07-10 | Operation method based on gas engine heat pump and organic Rankine cycle coupling system |
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| Publication Number | Publication Date |
|---|---|
| CN113932472A true CN113932472A (en) | 2022-01-14 |
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| CN202010654619.XA Pending CN113932472A (en) | 2020-07-10 | 2020-07-10 | Operation method based on gas engine heat pump and organic Rankine cycle coupling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117308402A (en) * | 2023-11-30 | 2023-12-29 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Electric heating complementary system with compressed working medium as power source and heat sink |
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| CN110030763A (en) * | 2019-04-18 | 2019-07-19 | 蓝焰高科（天津）燃气技术有限公司 | Gas engine drives steam compression type Air Resource Heat Pump Unit operation method |
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| EP0987501A2 (en) * | 1998-09-14 | 2000-03-22 | Fujitsu General Limited | Air conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117308402A (en) * | 2023-11-30 | 2023-12-29 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Electric heating complementary system with compressed working medium as power source and heat sink |
| CN117308402B (en) * | 2023-11-30 | 2024-02-23 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Electric heating complementary system with compressed working medium as power source and heat sink |
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