CN106871473B - Single-machine two-stage compression refrigeration system with waste heat recovery device - Google Patents
Single-machine two-stage compression refrigeration system with waste heat recovery device Download PDFInfo
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
A single-unit two-stage compression refrigeration system with a waste heat recovery device comprises a single-unit two-stage compressor, an oil separator, a marine horizontal condenser, a liquid storage device, a drying filter, an intercooler, a heat regenerator, an evaporator, a vapor-liquid separator, an electromagnetic valve, an electronic expansion valve, a twisted-sheet heat exchanger, a circulating hot water pump, a first water tank, a filter, a butterfly valve, a check valve, a heat pipe type heat exchanger, a diesel engine, a generator, a first heat exchanger, a flash tank, a second heat exchanger, a second water tank and a reversing valve. The invention reduces the heat load of the condenser and improves the utilization rate of fuel oil and the refrigeration efficiency while recovering the condensation heat of the condenser and the waste heat of the waste gas of the diesel engine; the compression ratio is reduced, the operation condition of the single-machine two-stage compression refrigeration system in an ultralow temperature environment is improved, and the method has obvious advantages in the aspects of energy conservation and emission reduction, improvement of the safety and stability of the refrigeration system and the like.
Description
Technical Field
The invention belongs to the field of refrigeration and low temperature, and particularly relates to a single-unit two-stage compression refrigeration system with a waste heat recovery device.
Background
The ocean fishing boat usually adopts R22 as a refrigeration working medium, obtains an ultralow temperature environment through single-machine two-stage compression refrigeration cycle, and refrigerates and keeps the captured aquatic products fresh. The tuna is extremely easy to be oxidized by myoglobin in the body to be browned, so that the taste and the commercial value of the tuna are greatly reduced. When the fishing boat freezes and preserves the high-pressure refrigeration system, the evaporation temperature of the fishing boat refrigeration system is usually less than or equal to minus 60 ℃, and because only one compressor is used, the high-pressure stage and the low-pressure stage of the refrigeration system are compressed too much under the ultralow temperature working condition, the refrigeration efficiency is low, and the compressor is in overload operation for a long time, which is not beneficial to the safe and stable operation of the system. A large amount of heat energy in the tail gas of the fishing boat diesel engine and the condenser of the refrigeration system is directly discharged to the environment, so that the problems of energy waste, environment heat and the like are caused.
Disclosure of Invention
The invention provides a single-unit two-stage compression refrigeration system with a waste heat recovery device, aiming at the defects of the prior art, and the method of combining the waste heat recovery device and the single-unit two-stage compression refrigeration system is adopted, so that the problems of waste of exhaust waste heat of a fishing boat diesel engine and condensation heat of the refrigeration system, overhigh compression ratio of a high-pressure stage and a low-pressure stage of the system under an ultralow temperature working condition, lower refrigeration efficiency and the like are effectively solved.
The invention adopts a technical scheme for solving the problems and provides a single-unit two-stage compression refrigeration system with a waste heat recovery device. The system comprises a single-machine two-stage compressor, an oil separator, a twisted-sheet heat exchanger, a condenser, a liquid reservoir, a drying filter, a first throttling device, an intercooler, an electromagnetic valve, a heat regenerator, a second throttling device, an evaporator, a vapor-liquid separator, a heat pipe type heat exchanger, a first water tank, a second water tank, an electromagnetic valve, a filter, a butterfly valve, a circulating hot water pump, a check valve, a generator, a diesel engine, a first heat exchanger, a second heat exchanger, a flash tank, a reversing valve, a water quantity regulating valve, a water level sensor and a temperature sensor. The condenser is characterized in that a torsion plate heat exchanger is arranged between the oil separator and the condenser; a heat pipe type heat exchanger is added behind the twisted sheet heat exchanger; a reversing valve is arranged behind the diesel engine; a superconducting pipe heat exchanger is arranged between the condenser and the diesel engine.
High-temperature and high-pressure refrigerant steam flows out of an exhaust port of the single-machine two-stage compressor, enters the twisted-sheet heat exchanger through the oil separator for heat exchange, and then enters the condenser for condensation; the refrigerant condensate enters a liquid receiver and then is divided into a main path and an auxiliary path by a drying filter, and the auxiliary path refrigerant enters an intercooler after being throttled by a first throttling device and then enters a single-machine two-stage compressor; the main path refrigerant enters an intercooler to exchange heat with the auxiliary path refrigerant, flows through an electromagnetic valve, a heat regenerator and a second throttling device, and then enters an evaporator to absorb heat for evaporation; the vaporized refrigerant steam is superheated by a heat regenerator, and then the refrigerant steam after passing through a gas-liquid separator enters a single-machine two-stage compressor; the diesel engine is connected with the generator, the generator provides power for the circulating hot water pump, and the first water tank, the filter, the butterfly valve, the circulating hot water pump, the torsion piece heat exchanger and the heat pipe type heat exchanger form a circulating water path; fresh water flows out of an outlet of the first water tank, passes through a filter, a butterfly valve, a circulating hot water pump and a check valve, enters the torsion-sheet heat exchanger, is heated by a high-temperature high-pressure refrigerant, enters the heat pipe type heat exchanger, is continuously heated by waste gas of the diesel engine, then flows into the first water tank, and is regulated by the water quantity regulating valve according to a signal of the water level sensor; the reversing valve performs reversing control according to a signal of the temperature sensor, and when the water temperature of the first water tank is lower than 65 ℃, the tail gas of the diesel engine is heated and circulated; when the water temperature of the first water tank exceeds 65 ℃, the reversing valve automatically reverses, and a seawater desalination cycle is started; the seawater is preheated by the condenser, enters the first heat exchanger, is heated by the tail gas of the diesel engine, flows into the flash tank for evaporation, and the water vapor enters the second heat exchanger, is condensed and flows into the second water tank; the concentrated seawater is discharged in the flash tank.
The first throttling device and the second throttling device are electronic expansion valves. The application range is wide, the set value of the superheat degree is adjustable, and the development requirement of mechanical and electrical integration is met.
The water tank is a heat preservation water tank, the water level can be automatically controlled, the water tank stops water replenishing when the water level is higher than the 3/4 liquid level of the first water tank, and the water tank starts water replenishing when the water level of the first water tank is lower than the 1/2 liquid level.
The intercooler is a plate heat exchanger or a double-pipe heat exchanger.
The first heat exchanger and the second heat exchanger are superconducting tube heat exchangers, and seawater entering the first heat exchanger is preheated by the condenser, so that the heat exchange efficiency of the superconducting tube heat exchangers can be improved.
The reversing valve can automatically reverse according to the temperature of the first water tank, and when the water temperature of the first water tank is lower than 65 ℃, the tail gas of the diesel engine is used for heating water; when the water temperature of the first water tank is higher than 65 ℃, the reversing valve automatically reverses, and the tail gas of the diesel engine is used for desalting seawater.
The waste heat of the tail gas of the diesel engine has double functions of fresh water heating and seawater desalination.
The seawater after exiting the condenser is divided into two paths of first heat exchangers for seawater desalination, and the other path of seawater enters a second heat exchanger for cooling water vapor.
The condenser is provided with the zinc block, the corrosion of seawater to the condenser is slowed down by adopting a sacrificial anode method, and the anti-corrosion effect is obvious.
Compared with the prior art, the invention has the beneficial effects that:
according to the single-unit two-stage compression refrigeration system with the waste heat recovery device, the waste heat recovery system is connected in parallel between the oil separator and the condenser, so that the problems of waste heat of a fishing boat diesel engine and condensation heat waste and environmental heat pollution of the refrigeration system are effectively solved. Meanwhile, the heat load of the condenser is greatly reduced, the temperature difference between the condensation temperature and the evaporation temperature is reduced, and the refrigeration efficiency is improved. The problems that the compression ratio of a high-pressure stage and a low-pressure stage of the refrigeration system is too large, the refrigeration effect is poor and the like under the ultralow temperature working condition are solved, and the compressor is prevented from being in overload operation for a long time.
Description of the drawings:
FIG. 1 is a schematic structural view of a variable flow single-machine two-stage compression refrigeration system with a waste heat recovery device.
Wherein: 1. a single-machine two-stage compressor; 2. an oil separator; 3. a twisted-sheet heat exchanger; 4. a condenser; 5. a liquid reservoir; 6. drying the filter; 7. a first throttling device; 8. an intercooler; 9. an electromagnetic valve; 10. a heat regenerator; 11. a second throttling device; 12. an evaporator; 13. a vapor-liquid separator; 14. a heat pipe type heat exchanger; 15. a first water tank; 16. an electromagnetic valve; 17. a filter; 18. a butterfly valve; 19. a circulating hot water pump; 20. a check valve; 21. a generator; 22. a diesel engine; 23. a first heat exchanger; 24. a flash tank; 25. a second heat exchanger; 26. a second water tank; 27. a diverter valve; 28. a water quantity regulating valve; 29. a water level sensor; 30. a temperature sensor.
The specific implementation mode is as follows:
according to the single-unit two-stage compression refrigeration system with the waste heat recovery device, the waste heat recovery system is arranged between the oil separator and the condenser in parallel, and fresh water flows out of the first water tank, is heated by a high-temperature and high-pressure refrigerant in fin heat exchange, enters the heat pipe type heat exchanger and is continuously heated by tail gas of a diesel engine of a fishing boat. The condensation heat of the refrigeration system and the waste heat of the tail gas of the fishing boat diesel engine are recycled. The high-temperature high-pressure refrigerant separated from the oil separator is cooled in the twisted sheet heat exchanger and then enters the condenser to be further cooled by seawater, so that the heat load of the condenser is greatly reduced, the temperature between the condensing temperature and the evaporating temperature is reduced, the reduction of the compression ratio of a high-pressure stage and a low-pressure stage of the two-stage compression refrigeration system under the ultralow-temperature working condition is realized, and the running stability and the refrigeration efficiency of the refrigeration system are improved.
The invention is described in detail below with reference to the figures and specific examples.
High-temperature and high-pressure refrigerant steam flows out of an exhaust port of the single-machine two-stage compressor 1, enters the twisted-sheet heat exchanger 3 through the oil separator 2 for heat exchange, and then enters the condenser 4 for condensation; the refrigerant condensate enters a liquid receiver 5, then is divided into a main path and an auxiliary path through a drying filter 6, and the auxiliary path refrigerant enters an intercooler 8 after being throttled by a first throttling device 7 and then enters a single-machine two-stage compressor 1; the main refrigerant enters an intercooler to exchange heat with the auxiliary refrigerant, flows through an electromagnetic valve 9, a heat regenerator 10 and a second throttling device 11, and then enters an evaporator 12 to absorb heat and evaporate; the vaporized refrigerant steam is superheated by the heat regenerator 10, and then enters the single-machine two-stage compressor 1 after passing through the vapor-liquid separator 13; the diesel engine 22 is connected with the generator 21, the generator 21 provides power for the circulating hot water pump 19, and the first water tank 15, the filter 17, the butterfly valve 18, the circulating hot water pump 19, the torsion-piece heat exchanger 3 and the heat pipe type heat exchanger 14 form a circulating water path; fresh water flows out from an outlet of the first water tank 15, enters the twisted piece heat exchanger 3 after passing through the filter 17, the butterfly valve 18, the circulating hot water pump 19 and the check valve 20, is heated by a high-temperature and high-pressure refrigerant, enters the heat pipe type heat exchanger 14, is continuously heated by waste gas of the diesel engine, then flows into the first water tank 15, and is adjusted by the water quantity adjusting valve 28 according to a signal of the water level sensor 29; the reversing valve 27 performs reversing control according to a signal of the temperature sensor 30, and when the water temperature of the first water tank 15 is lower than 65 ℃, the tail gas of the diesel engine is subjected to heating circulation; when the water temperature of the first water tank 15 exceeds 65 ℃, the reversing valve 27 automatically reverses, and the seawater desalination cycle is started; the seawater is preheated by the condenser 4, enters the first heat exchanger 23, is heated by the tail gas of the diesel engine 22, flows into the flash tank 24 for evaporation, and the water vapor enters the second heat exchanger 25 to be condensed and flows into the second water tank 26; the concentrated seawater is discharged in a flash tank 24.
A single-machine two-stage compression refrigeration system with a waste heat recovery device mainly comprises the waste heat recovery device and the single-machine two-stage compression refrigeration system, wherein the tail gas waste heat of a fishing boat diesel engine 22 and the condensation heat of the refrigeration system are used for heating fresh water in a circulating water path, so that living hot water is provided for fishing boat fishermen. When the water temperature of the first water tank 15 exceeds 65 ℃, the reversing valve automatically reverses, and the tail gas of the diesel engine heats the seawater preheated by the condenser 3 for seawater desalination.
The invention relates to a refrigerating system working medium flow: high-temperature and high-pressure refrigerant steam flows out of an exhaust port of the single-machine two-stage compressor 1, enters the twisted-sheet heat exchanger 3 through the oil separator 2 for heat exchange, and then enters the condenser 4 for condensation; the refrigerant condensate enters a liquid receiver 5, then is divided into a main path and an auxiliary path through a drying filter 6, and the auxiliary path refrigerant enters an intercooler 8 after being throttled by a first throttling device 7 and then enters a single-machine two-stage compressor 1; the main path refrigerant enters an intercooler to exchange heat with the auxiliary path refrigerant, flows through an electromagnetic valve 9, a heat regenerator 10 and a second throttling device 11, and then enters an evaporator 12 to absorb heat for evaporation; the vaporized refrigerant vapor is superheated in the heat regenerator 10, and then enters the single-unit two-stage compressor 1 after passing through the vapor-liquid separator 13.
The invention relates to a working medium flow of a waste heat recovery system: fresh water flows out from an outlet of the first water tank 15, enters the twisted piece heat exchanger 3 after passing through the filter 17, the butterfly valve 18, the circulating hot water pump 19 and the check valve 20, is heated by a high-temperature and high-pressure refrigerant, enters the heat pipe type heat exchanger 14, is continuously heated by waste gas of the diesel engine, then flows into the first water tank 15, and is adjusted by the water quantity adjusting valve 28 according to a signal of the water level sensor 29; the reversing valve 27 performs reversing control according to a signal of the temperature sensor 30, and when the water temperature of the first water tank 15 is lower than 65 ℃, the tail gas of the diesel engine is subjected to heating circulation; when the water temperature of the first water tank 15 exceeds 65 ℃, the reversing valve 27 automatically reverses, and the seawater desalination cycle is started; the seawater is preheated by the condenser 4, enters the first heat exchanger 23, is heated by the tail gas of the diesel engine 22, flows into the flash tank 24 for evaporation, and the water vapor enters the second heat exchanger 25 to be condensed and flows into the second water tank 26; the concentrated seawater is discharged in a flash tank 24.
Taking a DC808 model 29.00 m trawler as an example, the rated power of a diesel engine is 176.5kW, the rotating speed is 1500 r/min, and the refrigerating capacity required by the trawler is 12 kW. When the temperature of the smoke entering the heat pipe type heat exchanger of the fishing boat diesel engine is 350 ℃, the temperature of the smoke leaving the heat pipe type heat exchanger is 280 ℃, and the available smoke heat is 33.2kW. When the fishing boat carries out freezing preservation on the tuna, the evaporation temperature of the refrigerating system is-65 ℃. The heat recoverable by the refrigerating system is calculated to be 5.9kW, and the total recovered heat of the fishing boat is 39.1kW. The water storage capacity of the heat preservation water tank is 1000kg, and the water can be used for 25-30 people for shower. The refrigerating unit and the fishing boat diesel engine are calculated to run for 1.34 hours, and the rest heat recovery can heat 1000kg of water from 20 ℃ to 65 ℃. Compared with the prior art, if the coal-fired boiler is adopted for preparation, the coal-fired boiler has the efficiency of 40 percent and the coal price of 600 yuan/t, 7.2 yuan can be saved per hour; if an oil-fired boiler is adopted, the oil-fired boiler efficiency is assumed to be 75%, and the price of diesel oil is 7200 yuan/t, 32.2 yuan can be saved per hour; if the electric boiler is adopted, the efficiency of the electric boiler is set to be 90 percent, and the electricity price is 0.62 yuan, 27 yuan can be saved in each hour. The initial investment of the waste heat recovery device is calculated according to 30000 yuan. If a coal-fired boiler is adopted, the cost can be recovered after 4167 hours; the cost needs to be recovered for 933h by adopting an oil-fired boiler; the fuel-electric boiler needs 1111.05h to recover the cost. When the waste heat recovery device is not added, the refrigeration coefficient of performance of the refrigeration system is 1.097, and when the waste heat recovery device is added, the refrigeration coefficient of performance of the refrigeration system is 1.395, and the refrigeration coefficient of performance is increased by 27%. The compression ratio of the high-pressure stage and the low-pressure stage of the refrigerating system is reduced by 18.3 percent.
Through the analysis, the single-unit two-stage compression refrigeration system with the waste heat recovery device provided by the invention has the advantages that the condensation heat of the refrigeration system and the waste heat of the tail gas of the fishing boat diesel engine are recovered to provide domestic water for the fishing boat, the temperature difference between the heat load of the condenser and the condensation temperature and the evaporation temperature is reduced, the refrigeration efficiency is improved, the problems of overlarge compression ratio of the refrigeration system under the ultralow temperature working condition and the like are effectively solved, the operation stability of the refrigeration system is improved, and the single-unit two-stage compression refrigeration system with the waste heat recovery device has obvious advantages in energy conservation and emission reduction.
Claims (5)
1. A single-unit two-stage compression refrigeration system with a waste heat recovery device comprises a single-unit two-stage compressor (1), an oil separator (2), a twisted sheet heat exchanger (3), a condenser (4), a liquid reservoir (5), a drying filter (6), a first throttling device (7), an intercooler (8), an electromagnetic valve (9), a heat regenerator (10), a second throttling device (11), an evaporator (12), a vapor-liquid separator (13), a heat pipe type heat exchanger (14), a first water tank (15), an electromagnetic valve (16), a filter (17), a butterfly valve (18), a circulating hot water pump (19), a check valve (20), a generator (21), a diesel engine (22), a first heat exchanger (23), a flash tank (24), a second heat exchanger (25), a second water tank (26), a reversing valve (27), a water quantity regulating valve (28), a water level sensor (29) and a temperature sensor (30); the oil separator is characterized in that a twisted-sheet heat exchanger (3) is arranged between the oil separator (2) and the condenser (4), and a heat pipe type heat exchanger (14) is arranged between the first water tank (15) and the twisted-sheet heat exchanger (3); a first heat exchanger (23) is arranged between the condenser (4) and the diesel engine (22); a reversing valve (27) is arranged behind the diesel engine (22); high-temperature and high-pressure refrigerant steam flows out of an exhaust port of the single-machine two-stage compressor (1), enters the twisted-sheet heat exchanger (3) through the oil separator (2) for heat exchange, and then enters the condenser (4) for condensation; the refrigerant condensate enters a liquid receiver (5), then is divided into a main path and an auxiliary path through a drying filter (6), and the auxiliary path refrigerant enters an intercooler (8) after being throttled by a first throttling device (7) and then enters a single-machine two-stage compressor (1); the main path refrigerant enters an intercooler to exchange heat with the auxiliary path refrigerant, flows through an electromagnetic valve (9), a heat regenerator (10) and a second throttling device (11), and then enters an evaporator (12) to absorb heat and evaporate; the evaporated refrigerant steam is superheated by the heat regenerator (10), and then enters the single-machine two-stage compressor (1) after passing through the vapor-liquid separator (13); the diesel engine (22) is connected with the generator (21), the generator (21) provides power for the circulating hot water pump (19), and the first water tank (15), the filter (17), the butterfly valve (18), the circulating hot water pump (19), the twisted piece heat exchanger (3) and the heat pipe type heat exchanger (14) form a circulating water path; fresh water flows out from an outlet of the first water tank (15), enters the twisted-sheet heat exchanger (3) through a filter (17), a butterfly valve (18), a circulating hot water pump (19) and a check valve (20), is heated by a high-temperature and high-pressure refrigerant, enters the heat pipe type heat exchanger (14), is continuously heated by waste gas of a diesel engine, and then flows into the first water tank (15), and a water quantity regulating valve (28) regulates according to a signal of a water level sensor (29); the reversing valve (27) performs reversing control according to a signal of the temperature sensor (30), and when the water temperature of the first water tank (15) is lower than 65 ℃, the tail gas of the diesel engine is subjected to heating circulation; when the water temperature of the first water tank (15) exceeds 65 ℃, the reversing valve (27) automatically reverses, and a seawater desalination cycle is started; seawater is preheated by a condenser (4), enters a first heat exchanger (23), is heated by tail gas of a diesel engine (22), flows into a flash tank (24) for evaporation, and water vapor enters a second heat exchanger (25), is condensed and flows into a second water tank (26); the concentrated seawater is discharged from the flash tank (24);
the first water tank (15) is a heat-preservation water tank; the water level can be automatically controlled, the water tank stops supplementing water when the water level is higher than the 3/4 liquid level of the first water tank, and the water tank begins supplementing water when the first water tank is lower than the 1/2 liquid level;
the seawater after exiting the condenser (4) is divided into two paths, one path enters a first heat exchanger (23) for seawater desalination, and the other path enters a second heat exchanger (25) for cooling water vapor.
2. The single-unit double-stage compression refrigeration system with the waste heat recovery device according to claim 1, wherein the first throttling device (7) and the second throttling device (11) are electronic expansion valves.
3. The single-unit two-stage compression refrigeration system with the waste heat recovery device according to claim 1, wherein the first heat exchanger (23) and the second heat exchanger (25) are superconducting tube heat exchangers.
4. The single-machine two-stage compression refrigeration system with waste heat recovery device according to claim 1,
the waste heat of the tail gas of the diesel engine (22) has double functions of fresh water heating and seawater desalination.
5. The single-machine double-stage compression refrigeration system with the waste heat recovery device according to claim 1, wherein the condenser (4) is provided with a zinc block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710226447.4A CN106871473B (en) | 2017-04-09 | 2017-04-09 | Single-machine two-stage compression refrigeration system with waste heat recovery device |
Applications Claiming Priority (1)
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| CN110173912B (en) * | 2019-04-29 | 2020-10-02 | 同济大学 | Mixed working medium compression circulation system with mechanical heat recovery function and working method |
| KR20210104189A (en) * | 2020-02-13 | 2021-08-25 | 현대자동차주식회사 | Multi-path cooling system and cooling system for eco-friendly vehicle applying the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110099841A (en) * | 2010-03-03 | 2011-09-09 | 김상원 | Ways and a manufacturing device manufacturing a clean the ocean for eating and drinking as use seawater and heat pump system |
| CN102336450A (en) * | 2011-08-10 | 2012-02-01 | 国家海洋局天津海水淡化与综合利用研究所 | Seawater distillation desalting device utilizing residual heat of diesel engine and desalting method |
| CN102838181A (en) * | 2012-09-19 | 2012-12-26 | 罗良宜 | Cold-heat combined supplying device for seawater desalination |
| CN103043737A (en) * | 2013-01-23 | 2013-04-17 | 林贤华 | Heat pump based all-weather sea water desalination system |
| CN203837369U (en) * | 2014-04-09 | 2014-09-17 | 浙江海洋学院 | Waste heat absorption refrigeration and compression refrigeration cascade refrigeratory device of tuna clipper |
| CN105627622A (en) * | 2016-03-23 | 2016-06-01 | 上海海洋大学 | Jetting type auto-cascade refrigeration system for waste heat recovery of tuna clipper |
-
2017
- 2017-04-09 CN CN201710226447.4A patent/CN106871473B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110099841A (en) * | 2010-03-03 | 2011-09-09 | 김상원 | Ways and a manufacturing device manufacturing a clean the ocean for eating and drinking as use seawater and heat pump system |
| CN102336450A (en) * | 2011-08-10 | 2012-02-01 | 国家海洋局天津海水淡化与综合利用研究所 | Seawater distillation desalting device utilizing residual heat of diesel engine and desalting method |
| CN102838181A (en) * | 2012-09-19 | 2012-12-26 | 罗良宜 | Cold-heat combined supplying device for seawater desalination |
| CN103043737A (en) * | 2013-01-23 | 2013-04-17 | 林贤华 | Heat pump based all-weather sea water desalination system |
| CN203837369U (en) * | 2014-04-09 | 2014-09-17 | 浙江海洋学院 | Waste heat absorption refrigeration and compression refrigeration cascade refrigeratory device of tuna clipper |
| CN105627622A (en) * | 2016-03-23 | 2016-06-01 | 上海海洋大学 | Jetting type auto-cascade refrigeration system for waste heat recovery of tuna clipper |
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