CN114909822A - Condenser parallel gas heat pump type steam unit - Google Patents
Condenser parallel gas heat pump type steam unit Download PDFInfo
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- CN114909822A CN114909822A CN202110185122.2A CN202110185122A CN114909822A CN 114909822 A CN114909822 A CN 114909822A CN 202110185122 A CN202110185122 A CN 202110185122A CN 114909822 A CN114909822 A CN 114909822A
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- 239000003507 refrigerant Substances 0.000 claims abstract description 150
- 239000007789 gas Substances 0.000 claims abstract description 125
- 230000006835 compression Effects 0.000 claims abstract description 57
- 238000007906 compression Methods 0.000 claims abstract description 57
- 230000001172 regenerating effect Effects 0.000 claims abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003546 flue gas Substances 0.000 claims abstract description 26
- 238000009833 condensation Methods 0.000 claims abstract description 24
- 230000005494 condensation Effects 0.000 claims abstract description 24
- 230000008676 import Effects 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000010687 lubricating oil Substances 0.000 claims description 32
- 239000000110 cooling liquid Substances 0.000 claims description 24
- 239000000779 smoke Substances 0.000 claims description 16
- 238000001704 evaporation Methods 0.000 claims description 12
- 230000008020 evaporation Effects 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 23
- 239000002918 waste heat Substances 0.000 abstract description 9
- 238000004781 supercooling Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 239000002826 coolant Substances 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
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- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- RWRIWBAIICGTTQ-UHFFFAOYSA-N anhydrous difluoromethane Natural products FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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- 229920003051 synthetic elastomer Polymers 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- 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
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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]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to the technical field of heat pump units, in particular to a condenser parallel gas heat pump type steam unit, wherein a heat medium exchanges heat with a refrigerant in a first refrigerant channel through a heat medium channel, a part of the heat medium exchanges heat with the refrigerant through a regenerative heat exchanger, the heat medium directly cools refrigerant liquid flowing through the regenerative heat exchanger, the supercooling degree of the refrigerant liquid is improved, a throttling device is reduced, a pipeline is simplified, and the operation efficiency of the unit is improved. The hot medium passageway of compression condensation unit is parallelly connected, connects respectively between hot medium total import and hot medium total export, and the cold medium passageway of a plurality of compression condensation units connects gradually the back and connects between cold medium total import and cold medium total export for the difference in temperature between each compression condensation unit's the evaporimeter is little, and heat exchange efficiency is higher. The engine unit is provided with the flue gas heat exchanger and the unfrozen liquid heat exchanger, and can exchange heat for a heat medium by utilizing waste heat of the engine, so that the heat exchange efficiency of the whole unit is improved.
Description
Technical Field
The invention relates to the technical field of heat pump units, in particular to a gas heat pump type steam unit with a condenser connected in parallel.
Background
In the industrial production process, a large amount of waste steam and waste water and high-humidity air exist, along with the limitation on the use of a boiler for coping with climate warming, in the occasions of a large amount of low-grade waste heat in food processing, plastic processing, chemical industry, paper industry, wood processing, synthetic rubber, textile industry, tobacco industry and the like, but the low-grade waste heat is hardly recycled in the prior art, so that a large amount of energy is wasted, and the requirements of energy conservation and emission reduction are not met.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a gas heat pump steam generator set in which condensers are connected in parallel.
The invention provides a condenser parallel connection gas heat pump type steam unit, which is provided with a heat medium total inlet, a heat medium total outlet, a cold medium total inlet and a cold medium total outlet and is characterized by comprising the following components: the heat recovery and exchange device comprises at least two compression condensing units, a heat recovery and exchange unit, an evaporation unit and an engine unit, wherein each compression condensing unit comprises a condenser, a compressor and a first throttling device, the condenser is provided with a heat medium channel and a first refrigerant channel, the heat medium channel is provided with a first heat medium inlet and a first heat medium outlet, the first refrigerant channel is provided with a first refrigerant inlet and a first refrigerant outlet, the condensers are connected in parallel, the first heat medium outlet is communicated with a heat medium main outlet, the first throttling device is arranged on a pipeline, the first refrigerant outlet is communicated with the evaporation unit, the heat recovery and exchange unit comprises a plurality of heat recovery heat exchangers, the number of the heat recovery heat exchangers is equal to that of the compression condensing units, the heat recovery heat exchangers are arranged in one-to-one correspondence with the compression condensing units, and each heat recovery heat exchanger is provided with a second heat medium inlet, The second heat medium inlet is communicated with the heat medium main inlet, the second heat medium outlet is communicated with the first heat medium inlet of the condenser of the compression condensing unit corresponding to the regenerative heat exchanger, the second refrigerant inlet is communicated with the first refrigerant outlet, the second refrigerant outlet is communicated with the first throttling device, each regenerative heat exchanger is also provided with a water bypass arranged on a communication pipeline between the second heat medium inlet and the second heat medium outlet, the plurality of water bypasses are communicated with one another to form a water main, the engine unit comprises a plurality of gas engines, a smoke exhaust main pipe, a smoke gas heat exchanger and a cylinder sleeve water heat exchanger, the number of the gas engines is equal to that of the compressors, the plurality of gas engines are connected with the plurality of compressors in one-to-one correspondence and used for driving the compressors to work, each gas engine is provided with a smoke gas pipeline and a cylinder sleeve, all the flue gas pipelines are connected to a smoke exhaust main pipe, a flue gas heat exchanger is arranged on the smoke exhaust main pipe and used for carrying out heat exchange with flue gas in the flue gas pipelines, and is provided with a fourth heat medium inlet and a fourth heat medium outlet, the fourth heat medium inlet is communicated with the heat medium main inlet, the fourth heat medium outlet is communicated with the heat medium main outlet, a cylinder sleeve water heat exchanger is provided with a third heat medium channel and a cooling liquid channel which are used for carrying out heat exchange with each other, the third heat medium channel is provided with a third heat medium inlet and a third heat medium outlet, the third heat medium inlet is communicated with the heat medium main inlet, the third heat medium outlet is communicated with a main water pipe, all the cylinder sleeves are connected with the cooling liquid channel, and cooling liquid flowing out of the cooling liquid channel respectively flows into each cylinder sleeve to carry out heat exchange and then returns to the cooling liquid channel.
In the gas heat pump steam unit with the parallel condenser, the present invention may further include: the evaporation unit comprises evaporators, the number of the evaporators is equal to that of the compression and condensation units, each evaporator is provided with a cold medium channel and a third refrigerant channel, each third refrigerant channel is provided with a third refrigerant inlet and a third refrigerant outlet, the number of the third refrigerant inlets and the number of the third refrigerant outlets are the same as that of the compression and condensation units connected, the first throttling device is connected with the third refrigerant inlets, and the first refrigerant inlets are connected with the third refrigerant outlets through compressors.
In the gas heat pump steam unit with the parallel condenser, the present invention may further include: the compression condensing unit further comprises an oil separating unit, the oil separating unit comprises an oil separator and a lubricating oil loop, the oil separator is provided with a gas inlet, a gas outlet and a lubricating oil outlet, the gas inlet is communicated with an exhaust port of the compressor, the gas outlet is communicated with the first refrigerant inlet, the lubricating oil outlet is communicated with one end of the lubricating oil loop, and the other end of the lubricating oil loop is communicated with the compressor.
In the gas heat pump steam unit with the parallel condenser, the present invention may further include: wherein, the oil separator is provided with an electric heater which heats the exhaust gas to a superheat degree to a set value T2, and T2 is any value between 5 ℃ and 15 ℃.
In the gas heat pump steam unit with a parallel condenser according to the present invention, the present invention may further include: and a vapor compressor, wherein the vapor compressor has a vapor inlet and a vapor outlet, the vapor inlet is communicated with the first heat medium outlet of each condenser, and the vapor outlet is communicated with the heat medium main outlet.
In the gas heat pump steam unit with the parallel condenser, the present invention may further include: the compression condensing unit further comprises an economizer which is any one of a shell-and-tube heat exchanger, a plate heat exchanger or a flash tank, and the first throttling device is any one of an electronic expansion valve, a ball float valve, a capillary tube or a thermal expansion valve.
In the gas heat pump steam unit with the parallel condenser, the present invention may further include: wherein, the smoke heat exchanger on the smoke exhaust main pipe is arranged at the downstream of the connection position of the smoke pipeline.
In the gas heat pump steam unit with the parallel condenser, the present invention may further include: wherein, the compressor is an open-type compressor.
In the gas heat pump steam unit with the parallel condenser, the present invention may further include: wherein, the number of the compressors in each compression condensing unit is 1 or more.
Action and effects of the invention
According to the condenser parallel gas heat pump type steam unit, the heat medium exchanges heat with the refrigerant in the first refrigerant channel through the heat medium channel, a part of the heat medium exchanges heat with the refrigerant through the regenerative heat exchanger, the heat medium directly cools the refrigerant liquid flowing through the regenerative heat exchanger, the supercooling degree of the refrigerant liquid is effectively improved, the number of throttling devices is reduced, and the connecting pipeline of the condenser parallel gas heat pump type steam unit is simplified, so that the operating efficiency of the condenser parallel gas heat pump type steam unit is improved.
The hot medium channels of the plurality of compression condensing units are connected in parallel and are respectively connected between the hot medium total inlet and the hot medium total outlet, and the cold medium channels are connected between the cold medium total inlet and the cold medium total outlet after being sequentially connected, so that the temperature difference between the evaporators is small, and the heat exchange efficiency is higher. The engine unit is provided with the flue gas heat exchanger and the cooling liquid heat exchanger, and can utilize waste heat of the engine to exchange heat for the heat medium, so that the heat exchange efficiency of the whole unit is improved.
Drawings
FIG. 1 is a schematic diagram of the connection and flow of a condenser parallel gas heat pump steam unit according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of the connection and flow of the condenser parallel gas heat pump steam unit according to the second embodiment of the present invention;
FIG. 3 is a schematic diagram of the connection and flow of the condenser parallel gas heat pump steam unit according to the third embodiment of the present invention;
FIG. 4 is a schematic diagram of the connection and flow of the condenser in parallel with the gas heat pump steam unit according to the fourth embodiment of the present invention;
fig. 5 is a schematic diagram showing connection of the condenser parallel connection engine unit of the gas heat pump steam unit according to the first embodiment of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement objects and effects of the invention easy to understand, the following embodiments specifically describe a gas heat pump steam unit with a condenser connected in parallel according to the present invention with reference to the accompanying drawings.
< first embodiment >
The embodiment provides a gas heat pump type steam unit with condensers connected in parallel.
Fig. 1 is a schematic diagram of the connection and flow of the condenser parallel gas heat pump steam unit according to the present embodiment.
As shown in fig. 1, the condenser parallel gas heat pump steam generator set 1000 has a heating medium inlet, a heating medium outlet, a cooling medium inlet, and a cooling medium outlet (not shown). The condenser parallel gas heat pump type steam unit 1000 further comprises at least two compression condensing units 100, a regenerative heat exchange unit, an evaporation unit 300 and an engine unit 400.
The heat medium form of the heat medium main inlet is water, the heat medium form of the heat medium main outlet is steam, and the cold medium flowing between the cold medium main inlet and the cold medium main outlet is water, exhaust steam or air.
The regenerative heat exchange unit comprises a plurality of regenerative heat exchangers 200, the number of the regenerative heat exchangers 200 is equal to that of the compression condensing units 100, and the plurality of regenerative heat exchangers 200 are arranged in one-to-one correspondence with the plurality of compression condensing units 100.
One evaporation unit 300 includes a plurality of evaporators 20, each communicating with a corresponding compression and condensation unit 100. The evaporator 20 has a cold medium channel with a first cold medium inlet 21 and a first cold medium outlet 22 and a third refrigerant channel. The third refrigerant passage has a third refrigerant outlet 23 and a third refrigerant inlet 24.
The first compression condensing unit includes a condenser 10, a compressor 30, and a throttling device 40.
The condenser 10 has a heat medium passage having a first heat medium outlet 11 and a first heat medium inlet 12, and a first refrigerant passage. The first refrigerant channel has a first refrigerant inlet 13 and a first refrigerant outlet 14, the first refrigerant outlet 14 being connected to a third refrigerant inlet 24. The plurality of condensers 10 of the plurality of compression condensing units 100 correspond to the evaporators 20 of the evaporation units 300 one to one.
The compressor 30 has a suction port 31 and a discharge port 32, the suction port 31 being connected to the third refrigerant outlet 23, and the discharge port 32 being connected to the first refrigerant inlet 13. The compressor 30 is a single-stage compressor or a multi-stage compressor, the compressor 30 is an open-type compressor, and the screw compressor 30 is 1 compressor or a plurality of compressors connected in parallel.
The first throttling means 40 is installed between the first refrigerant outlet 14 and the third refrigerant inlet 24, and throttles and depressurizes the refrigerant liquid flowing out of the first refrigerant outlet 14 to convert into a gas-liquid two-phase refrigerant. The first throttling device 40 is any one or more of an electronic expansion valve, a ball float valve, a capillary tube and a thermal expansion valve.
The refrigerant in the condenser 10 and the evaporator 20 is any one of NH3, R718, HFC32, HCFC123, HFC134a, HCFC142b, R290, HFC245fa, HFO514A, HFO1336mzz (Z), HFO1234ze, HFO1234yf or HFO1234Z, and the refrigerant in different compression condensation units 100 is the same or different.
The structures of the second compression and condensation unit, the … and the Nth compression and condensation unit are completely the same as the structure of the first compression and condensation unit, and the same structures are given the same numbers and are not described again.
The condensers 10 of the plurality of compression condensing units 100 are connected in parallel, the first heat medium outlet 11 is communicated with the heat medium main outlet, and the cold medium channels of the plurality of compression condensing units 100 are connected between the cold medium main inlet and the cold medium main outlet after being sequentially connected.
A plurality of recuperative heat exchangers 200 are respectively disposed on the compression condensing units 100 corresponding thereto, and the recuperative heat exchangers 200 have a second refrigerant outlet 201, a second refrigerant inlet 202, a second thermal medium inlet 203, and a second thermal medium outlet 204. The second heat medium inlet 203 is communicated with the heat medium main inlet, the second heat medium outlet 204 is communicated with the first heat medium inlet 12 of the compression condensing unit 100 corresponding to the recuperative heat exchanger 200, the second refrigerant inlet 202 is communicated with the first refrigerant outlet 14, and the second refrigerant outlet 201 is communicated with the first throttling device 40.
The recuperative heat exchanger 200 also has a water bypass provided on the connecting line between the second thermal medium inlet 203 and the second thermal medium outlet 204, which may be a water bypass hole provided on the connecting line. The plurality of water bypasses communicate with each other to form a water main C.
Fig. 5 is a schematic diagram showing connection of the engine unit 400 of the condenser parallel gas heat pump steam unit 1000 in the present embodiment.
As shown in fig. 5, the engine unit 400 includes a plurality of gas engines 1, a plurality of connection devices 2, a smoke exhaust manifold 9, a smoke gas heat exchanger 90, a liner water heat exchanger 4, and a pump 3,
the number of the gas engines 1 is equal to the number of the compressors 30, and the plurality of gas engines 1 are connected with the plurality of compressors 30 in a one-to-one correspondence manner through the plurality of connection devices 2, and the gas engines 1 drive the compressors 30 to operate. The gas engine 1 has flue gas ducts (not shown) and cylinder liners (not shown), all of which are connected to a flue gas main 9. The coupling device 2 is a coupling or a gearbox.
The flue gas heat exchanger 90 is arranged on the flue gas exhaust main pipe 9 and can exchange heat with flue gas in the flue gas pipeline. The flue gas heat exchanger 90 has a fourth thermal medium inlet 91, a fourth thermal medium outlet 92 and a flue gas outlet 130. The fourth thermal medium inlet 91 is communicated with the thermal medium main outlet, and the fourth thermal medium outlet 92 is communicated with the thermal medium main inlet.
The liner water heat exchanger 4 has a third thermal medium passage (not shown in the figure) and a coolant passage (not shown in the figure) capable of heat exchange with each other, the third thermal medium passage having a third thermal medium inlet 5 and a third thermal medium outlet 6, the third thermal medium inlet 5 communicating with the thermal medium main inlet, and the third thermal medium outlet 6 communicating with the water main C.
The cooling liquid channel is provided with a cooling liquid inlet 7 and a cooling liquid outlet 8, all the cylinder sleeves are connected with the cooling liquid channel, and cooling liquid flowing out of the cooling liquid channel flows into each cylinder sleeve through the cooling liquid outlet 8 to exchange heat and then returns to the cooling liquid channel through the cooling liquid inlet 7.
The pump 3 is arranged on a pipeline between the cylinder sleeve and the cooling liquid channel and can drive the cooling liquid to circulate in the cooling liquid cylinder sleeve. In practical applications, the number of the pumps may be one or more, and the plurality of circulation pumps are connected to the plurality of gas engines 1 in a one-to-one correspondence.
The specific working process of the condenser parallel gas heat pump steam unit 1000 provided in this embodiment is as follows:
as shown in fig. 1 and 5, the refrigerant gas from the evaporator 20 of each compression and condensation unit 100 is compressed by the compressor 30 driven by the gas engine 1 and discharged into the condenser 10 to be condensed into refrigerant liquid, and the released latent heat of condensation and excessive heat of the refrigerant are used to heat the heat medium in the heat medium passage passing through the condenser 10. After the flue gas exhausted from the gas engine 1 enters the flue gas heat exchanger 90 through the flue gas main pipe 9 for heat exchange, the flue gas is exhausted from the flue gas outlet 130.
The heat medium enters from the heat medium general inlet and then is divided into two paths, one path enters into the regenerative heat exchanger 200 through the second heat medium inlet 203 of each regenerative heat exchange unit to exchange heat with the refrigerant liquid in the regenerative heat exchanger 200, then flows out from the second heat medium outlet 204 and enters into the condenser 10 of the compression condensing unit 100 corresponding to the regenerative heat exchanger 200, and the heat medium is discharged from the heat medium general outlet after exchanging heat with the refrigerant in the heat medium channel; the other path enters the cylinder liner water heat exchanger 4 through a third heat medium inlet 5, exchanges heat with the coolant and then is discharged into the water main from a third heat medium outlet 6. After the refrigerant in the first refrigerant channel of each condenser 10 releases heat, the refrigerant is converted into a gas-liquid two-phase refrigerant through the first throttling device 40, and then returns to the third refrigerant channel of the evaporator 20 corresponding to the condenser 10 again to exchange heat with the cold medium flowing through the evaporator 20, so as to be converted into a refrigerant gas after absorbing heat, and then returns to the compressor 30 again to complete the primary cycle.
The above processes are circularly repeated, and the waste heat of the cold medium can be recycled to heat the heat medium. The shape of the cold medium main inlet is one of steam exhaust, waste water and air, and the corresponding shape of the cold medium main outlet is one of condensed water, waste water and air. The shape of the heat medium main inlet is one of heat conduction oil, water and air, and the shape of the heat medium main outlet is one of heat conduction oil, water and air.
Effects and effects of embodiment one
According to the gas heat pump type steam unit with the parallel-connected condensers, which is related by the embodiment, the gas heat pump type steam unit comprises at least two compression condensing units, a regenerative heat exchange unit and an evaporation unit, each compression condensing unit comprises a condenser, a compressor and a first throttling device, the condenser is provided with a heat medium channel and a first refrigerant channel, the heat medium channel is provided with a first heat medium inlet and a first heat medium outlet, the first refrigerant channel is provided with a first refrigerant inlet and a first refrigerant outlet, the plurality of condensers are connected in parallel, the first heat medium outlet is communicated with a heat medium main outlet, the first throttling device is arranged on a pipeline communicated with the evaporation unit at the first refrigerant outlet, the regenerative heat exchange unit comprises a plurality of regenerative heat exchangers which are equal to the number of the compression condensing units, the plurality of regenerative heat exchangers are arranged in one-to-one correspondence with the plurality of compression condensing units, each regenerative heat exchanger is provided with a second heat medium inlet, a second heat medium outlet, a second refrigerant inlet and a second refrigerant outlet, the second heat medium inlet is communicated with the heat medium main inlet, the second heat medium outlet is communicated with the first heat medium inlet of the condenser of the compression condensing unit corresponding to the regenerative heat exchanger, the second refrigerant inlet is communicated with the first refrigerant outlet, and the second refrigerant outlet is communicated with the first throttling device. The heat medium exchanges heat with the refrigerant in the first refrigerant channel through the heat medium channel, a part of the heat medium exchanges heat with the refrigerant through the regenerative heat exchanger, the heat medium directly cools the refrigerant liquid flowing through the regenerative heat exchanger, the supercooling degree of the refrigerant liquid is effectively improved, the number of throttling devices is reduced, the connecting pipeline of the condenser parallel gas heat pump type steam unit is simplified, and therefore the running efficiency of the condenser parallel gas heat pump type steam unit is improved. And a plurality of compression condensing unit's hot-medium passageway are parallelly connected together, connect respectively between hot-medium total import and hot-medium total export, and a plurality of cold medium passageways connect gradually the back and connect between cold medium total import and cold medium total export for the difference in temperature between each evaporimeter is little, and heat exchange efficiency is higher. The engine unit is provided with the flue gas heat exchanger and the cooling liquid heat exchanger, and can exchange heat for the heat medium by utilizing the waste heat of the engine, so that the heat exchange efficiency of the whole unit is improved.
< example II >
The present embodiment provides a condenser parallel gas heat pump steam unit, and the difference between the condenser parallel gas heat pump steam unit of the present embodiment and the condenser parallel gas heat pump steam unit in the first embodiment is that the compression and condensation unit 100 of the condenser parallel gas heat pump steam unit 2000 (see fig. 2) provided in the present embodiment further includes an oil separation unit 50 and a vapor compressor 80, and all the compression and condensation units 100 are connected to the regenerative heat exchanger 200. Other structures in this embodiment are the same as those in the first embodiment, and the same structures are given the same reference numerals.
Fig. 2 is a schematic diagram of the connection and flow of the condenser parallel gas heat pump steam unit according to the present embodiment.
As shown in fig. 2, the oil separator unit 50 includes an oil separator 51 and a lubrication oil circuit 52.
The oil separator 51 has a gas inlet 511, a gas outlet 512, and a lubricating oil outlet 513. The gas inlet 511 is connected to the discharge port 32 of the compressor 30, and the gas outlet 512 is connected to the first refrigerant inlet 13. The oil separator 51 is any one of a centrifugal oil separator, a washing oil separator, a packing oil separator, and a filtering oil separator.
The oil separator 51 is provided with an electric heater 514, if the exhaust superheat degree is less than a set value T1, the electric heater 514 starts heating to ensure that the exhaust superheat degree reaches a set value T2, and T2 is any value between 5 ℃ and 15 ℃, so that the lubricating oil separated from the oil separator 51 is ensured to be free of liquid refrigerant.
One end of the lubricating oil circuit 52 is connected to the lubricating oil outlet 513, and the other end is connected to the compressor.
The vapor compressor 80 has a vapor inlet 81 and a vapor outlet 82, the vapor inlet 81 communicating with the first heat medium outlet 11 of each condenser 10, and the vapor outlet 82 communicating with the total heat medium outlet.
As shown in fig. 2, the refrigerant gas containing the lubricating oil discharged from the compressor 30 enters the oil separator 51 through the gas inlet 511, the refrigerant gas from which the lubricating oil is separated is discharged from the gas outlet 512, and the separated lubricating oil returns to the compressor 30 through the lubricating oil circuit 52. The heat medium in the heat medium passage of the condenser 10 is discharged from the first heat medium outlet 22 after heat exchange with the refrigerant, enters the vapor compressor 80 through the vapor inlet 81, is compressed, and is discharged from the heat medium outlet after passing through the vapor outlet 82.
Effects and effects of example two
The condenser parallel gas heat pump steam unit provided in this embodiment has the same functions and effects as the unit provided in the first embodiment, and further description is omitted here.
The unit that this embodiment provided has the oil separating unit, can separate the lubricating oil in the refrigerant gas to return the lubricating oil to the compressor, supply compressor cycle to use, reduce cost, and extension compressor life.
< example three >
The present embodiment provides a condenser parallel gas heat pump steam generator set which is different from the condenser parallel gas heat pump steam generator set 1000 in the first embodiment in that the compression condensing unit 100 of the condenser parallel gas heat pump steam generator set 3000 in the present embodiment further includes an economizer 60 and a second throttling device 70. The economizer 60 is one of a shell and tube heat exchanger, a plate heat exchanger, or a flash tank. Other structures in this embodiment are the same as those in the first embodiment, and the same structures are given the same reference numerals.
The economizer 60 in this embodiment is a shell and tube heat exchanger or a plate heat exchanger.
Fig. 3 is a schematic diagram of the connection and flow of the condenser parallel gas heat pump steam unit in the present embodiment.
As shown in fig. 3, the economizer 60 in this embodiment includes a first branch 61 and a second branch 62. The first branch 61 has a first inlet and a first outlet, and the second branch 62 has a second inlet and a second outlet. The economizer 60 is one of a shell and tube heat exchanger and a plate heat exchanger.
A first inlet of the economizer 60 installed in the compression condensing unit 100 is connected to the second refrigerant outlet 201, and a first outlet is connected to the first throttling device 40. The second inlet is connected to the second refrigerant outlet 201, and the second outlet is connected to the compressor 30.
The second throttling device 70 is disposed between the first refrigerant outlet 14 and the second inlet. The second throttling device 70 is any one or more of an electronic expansion valve, a ball float valve, a capillary tube and a thermal expansion valve.
The specific working process of the condenser parallel gas heat pump steam unit 3000 provided in this embodiment is as follows:
as shown in fig. 3, the refrigerant gas from the evaporator 20 of the compression and condensation unit 100 is compressed by the compressor 30 and discharged into the condenser 10, and the released latent heat of condensation and excessive heat of the refrigerant heat the heat medium in the heat medium passage passing through the condenser 10. The heat medium enters from the heat medium main inlet and then is divided into two paths, one path of the heat medium enters the regenerative heat exchanger 200 through each second heat medium inlet 203 to exchange heat with the refrigerant liquid in the regenerative heat exchanger 200, flows out from the second heat medium outlet 204, enters the heat medium channel of the corresponding compression condensing unit 100 to exchange heat, and is discharged from the heat medium main outlet; and the other path of the coolant enters a cylinder liner water heat exchanger 4 through a third heat medium inlet 5, exchanges heat with the coolant and then is discharged into a water main through a third heat medium outlet 6. The refrigerant in the first refrigerant channel of the condenser 10 of the compression and condensation unit 100 releases heat, passes through the regenerative heat exchanger 200 and is divided into two paths, one path passes through the first branch 61, is converted into a gas-liquid two-phase refrigerant through the first throttling device 40, returns to the third refrigerant channel of the evaporator 20 again, exchanges heat with cold water flowing through the evaporator 20, absorbs heat, is converted into refrigerant gas, and returns to the compressor 30 again; the other path is converted into gas-liquid two-phase refrigerant by the second throttling device 70, enters the second branch 62, completes heat exchange with the refrigerant in the first branch 61, and returns to the compressor 30, so as to complete one cycle.
The above processes are circularly repeated, and the waste heat of the cold medium can be recycled to heat the heat medium to raise the temperature.
Action and Effect of example III
The condenser parallel gas heat pump steam unit provided in this embodiment has the same functions and effects as the condenser parallel gas heat pump steam unit provided in the first embodiment, and details are not described herein.
The gas heat pump type steam unit with the parallel connection of the condenser and the gas heat pump has the economizer, and can perform secondary cooling on another part of refrigerant by throttling and evaporating one part of refrigerant, so that the energy consumption is reduced, the energy is saved, and the running cost of the unit is reduced.
< example four >
The present embodiment provides a condenser-parallel gas heat pump steam unit which is different from the condenser-parallel gas heat pump steam unit 2000 of the second embodiment in that the compression condensing unit 100 of the condenser-parallel gas heat pump steam unit 4000 (see fig. 4) of the present embodiment is provided with an oil separating unit 50 and a condenser 310, and the oil separating unit 50 includes an oil separator 51 and a lubricating oil circuit 52.
The oil separator 50 is built in the condenser 310. The condenser 310 has a heat medium passage having a first heat medium outlet 311 and a first heat medium inlet 312, and a first refrigerant passage. The first refrigerant passage has a first refrigerant inlet 313 and a first refrigerant outlet 314, and the first refrigerant outlet 314 is connected to the third refrigerant inlet 24. Other structures in this embodiment are the same as those in the embodiment, and the same reference numerals are given to the same structures.
Fig. 4 is a schematic diagram showing the connection and flow of the condenser parallel gas heat pump steam generator set in the present embodiment.
As shown in fig. 4, the oil separator 51 has a gas inlet 511, a gas outlet 512, and a lubricating oil outlet 513. The gas inlet 511 is connected to the discharge port 32 of the compressor 30, and the gas outlet 512 is the first refrigerant inlet 13. The oil separator 51 is any one of a centrifugal oil separator, a wash oil separator, a packed oil separator, and a filter oil separator.
The oil separator 51 is provided with an electric heater 514, if the exhaust superheat degree is less than a set value T1, the electric heater 514 starts heating to ensure that the exhaust superheat degree reaches a set value T1, and T1 is any value between 5 ℃ and 15 ℃, so that the lubricating oil separated from the oil separator 51 is ensured to be free of liquid refrigerant.
One end of the lubricating oil circuit 52 is connected to the lubricating oil outlet 513, and the other end is connected to the compressor 30.
The specific working process of the gas heat pump steam unit 4000 with the parallel-connected condenser provided by the embodiment is as follows:
as shown in fig. 4, after the refrigerant gas from the evaporator 20 is compressed by the compressor 30 of each compression/condensation unit 100, the discharged refrigerant gas containing the lubricating oil enters the oil separator 51 through the gas inlet 511, the refrigerant gas from which the lubricating oil is separated enters the condenser 310 through the gas outlet 512, and the separated lubricating oil returns to the compressor 30 through the lubricating oil circuit 52. The refrigerant gas enters the condenser 310 to be condensed into refrigerant liquid, and the discharged latent heat of condensation of the refrigerant and the excessive heat of the refrigerant heat the hot water in the heat medium passage passing through the condenser 310. After the refrigerant gas from the evaporator 20 is compressed by the compressor 30 of the compression and condensation unit 100, the discharged refrigerant gas containing the lubricating oil enters the oil separator 51 through the gas inlet 511, the refrigerant gas from which the lubricating oil is separated enters the condenser 310 through the gas outlet 512, and the separated lubricating oil returns to the compressor 30 through the lubricating oil circuit 52. The refrigerant gas enters the condenser 310 as a refrigerant liquid, and the discharged latent heat of condensation and supercooling heat of the refrigerant heat the hot water in the heat medium passage passing through the condenser 310. The heat medium is divided into two paths after entering from the heat medium main inlet, one path of the heat medium enters the condenser 310 of each compression condensing unit 100 respectively to absorb the condensation heat of the refrigerant gas, raise the temperature and subcool the refrigerant liquid, and the refrigerant liquid is discharged into the heat medium main outlet after being heated into steam; and the other path of the coolant enters a cylinder liner water heat exchanger 4 through a third heat medium inlet 5, exchanges heat with the coolant and then is discharged into a water main through a third heat medium outlet 6. The refrigerant in the refrigerant pipeline of the condenser 310 of the compression and condensation unit 100 is divided into two paths after releasing heat, one path passes through the first branch 61, is converted into a gas-liquid two-phase refrigerant through the first throttling device 40, returns to the third refrigerant channel of the corresponding evaporator 20 again, exchanges heat with the cold medium flowing through the evaporator 20, absorbs heat, is converted into refrigerant gas, and returns to the corresponding compressor 30 again; the other path is converted into gas-liquid two-phase refrigerant by the second throttling device 70, enters the second branch 62, completes heat exchange with the refrigerant in the first branch 61, and returns to the compressor 30, so as to complete one cycle.
The above processes are circularly repeated, and the waste heat of the cold medium can be recycled to heat the heat medium to raise the temperature.
Effects and effects of example four
The condenser parallel gas heat pump steam unit provided in this embodiment and the condenser parallel gas heat pump steam unit provided in the fifth embodiment have the same structure and the same effects, and are not described herein again.
The condenser parallel gas heat pump type steam unit provided by the embodiment is provided with the evaporator, the manufacturing cost of the evaporator can be further reduced for the application that a cold medium total inlet is dead steam or the temperature difference between a cold medium total opening and a total outlet is extremely small, and the oil separator is arranged in the condenser, so that the occupied area, the volume and the manufacturing cost of the condenser parallel gas heat pump type steam unit are remarkably reduced.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
The second embodiment and the fourth embodiment of the invention comprise oil separation units, and the oil separation units in the two embodiments do not comprise oil coolers, but in practical application, oil coolers can be arranged in the oil separation units according to actual needs to cool oil flowing back to the compressor.
In the invention, the gas engine is not provided with the intercooler, but in practical application, the intercooler can be arranged according to actual needs, and the cooling or waste heat utilization of the intercooler belongs to the prior art and is not described in detail.
Claims (8)
1. The utility model provides a parallelly connected gas heat pump formula steam unit of condenser, has total import of hot medium, total export of hot medium, total import of cold medium and total export of cold medium, its characterized in that includes:
at least two compression condensing units, a heat regenerative heat exchange unit, an evaporation unit and an engine unit,
each of the compression condensing units includes a condenser having a heat medium passage and a first refrigerant passage, the heat medium passage having a first heat medium inlet and a first heat medium outlet, the first refrigerant passage having a first refrigerant inlet and a first refrigerant outlet, a plurality of the condensers connected in parallel, and the first heat medium outlet communicating with the heat medium overall outlet,
the first throttling device is arranged on a pipeline of the first refrigerant outlet communicated with the evaporation unit,
wherein the regenerative heat exchange unit comprises a plurality of regenerative heat exchangers with the same number as the compression condensing units, the plurality of regenerative heat exchangers and the plurality of compression condensing units are arranged in one-to-one correspondence,
each of the regenerative heat exchangers has a second heat medium inlet, a second heat medium outlet, a second refrigerant inlet and a second refrigerant outlet, the second heat medium inlet is communicated with the heat medium main inlet, the second heat medium outlet is communicated with the first heat medium inlet of the condenser of the compression condensing unit corresponding to the regenerative heat exchanger, the second refrigerant inlet is communicated with the first refrigerant outlet, the second refrigerant outlet is communicated with the first throttling device, each of the regenerative heat exchangers further has a water bypass provided on a regenerative communication pipeline between the second heat medium inlet and the second heat medium outlet, a plurality of the water bypasses are communicated with each other to form a water main,
the engine unit comprises a plurality of gas engines, a smoke exhaust main pipe, a smoke heat exchanger and a cylinder sleeve water heat exchanger,
the number of the gas engines is equal to that of the compressors, the gas engines are connected with the compressors in a one-to-one correspondence mode and used for driving the compressors to work, each gas engine is provided with a flue gas pipeline and a cylinder sleeve, all the flue gas pipelines are connected to the smoke exhaust main pipe,
the flue gas heat exchanger is arranged on the flue gas main pipe, is used for carrying out heat exchange with flue gas in the flue gas pipeline and is provided with a fourth heat medium inlet and a fourth heat medium outlet, the fourth heat medium inlet is communicated with the heat medium main inlet, the fourth heat medium outlet is communicated with the heat medium main outlet,
the cylinder liner water heat exchanger is provided with a third heat medium channel and a cooling liquid channel which are used for exchanging heat with each other, the third heat medium channel is provided with a third heat medium inlet and a third heat medium outlet, the third heat medium inlet is communicated with the heat medium main inlet, the third heat medium outlet is communicated with the water main pipe,
all the cylinder sleeves are connected with the cooling liquid channel, and cooling liquid flowing out of the cooling liquid channel flows into each cylinder sleeve respectively to exchange heat and then returns to the cooling liquid channel.
2. The parallel condenser gas heat pump steam unit of claim 1,
wherein the evaporation units comprise evaporators, the number of evaporators being equal to the number of compression condensation units,
the evaporator is provided with a cold medium channel and a third refrigerant channel, the third refrigerant channel is provided with a third refrigerant inlet and a third refrigerant outlet, the number of the third refrigerant inlets and the third refrigerant outlets is the same as that of the connected compression condensing units,
said first throttling means being connected to said third refrigerant inlet,
the first refrigerant inlet is connected to the third refrigerant outlet through the compressor.
3. The parallel condenser gas heat pump steam unit of claim 1, further comprising:
wherein the compression condensing unit further comprises an oil separating unit,
the oil separation unit includes an oil separator and a lubrication oil circuit,
the oil separator has a gas inlet, a gas outlet, and a lubricating oil outlet, the gas inlet is communicated with the exhaust port of the compressor, the gas outlet is communicated with the first refrigerant inlet, the lubricating oil outlet is communicated with one end of the lubricating oil circuit, and the other end of the lubricating oil circuit is communicated with the compressor.
4. A condenser parallel gas heat pump steam unit according to claim 3, wherein:
the oil separator is internally provided with an electric heater which heats the exhaust gas to a superheat degree which is between a set value T2, and T2 is any value between 5 ℃ and 15 ℃.
5. The parallel condenser gas heat pump steam unit of claim 1, further comprising:
a vapor compressor, a compressor for vapor,
wherein the vapor compressor has a vapor inlet in communication with the first thermal medium outlet of each of the condensers and a vapor outlet in communication with the thermal medium main outlet.
6. The parallel condenser gas heat pump steam unit of claim 1, wherein:
wherein the compression condensing unit further comprises an economizer which is any one of a shell-and-tube heat exchanger, a plate heat exchanger or a flash tank,
the first throttling device is any one of an electronic expansion valve, a ball float valve, a capillary tube or a thermal expansion valve.
7. The parallel condenser gas heat pump steam unit of claim 1, wherein:
the smoke heat exchanger on the smoke exhaust main pipe is arranged at the downstream of the connection position of the smoke pipeline.
8. The parallel condenser gas heat pump steam unit of claim 1, further comprising:
wherein the compressor is an open-type compressor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110185122.2A CN114909822A (en) | 2021-02-10 | 2021-02-10 | Condenser parallel gas heat pump type steam unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110185122.2A CN114909822A (en) | 2021-02-10 | 2021-02-10 | Condenser parallel gas heat pump type steam unit |
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| CN1782631A (en) * | 2004-12-01 | 2006-06-07 | 乐金电子(天津)电器有限公司 | Oil separator mounted with heater |
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| WO2014185525A1 (en) * | 2013-05-16 | 2014-11-20 | 国立大学法人佐賀大学 | Energy conversion system |
| CN105823279A (en) * | 2016-04-11 | 2016-08-03 | 广东美的暖通设备有限公司 | Control method for starting or stopping of electric heating band of oil separator of air-conditioner |
| CN111380257A (en) * | 2020-03-30 | 2020-07-07 | 上海南进热能技术有限公司 | Heat pump for realizing non-stop defrosting by utilizing waste heat of cylinder sleeve water of internal combustion engine |
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2021
- 2021-02-10 CN CN202110185122.2A patent/CN114909822A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1782631A (en) * | 2004-12-01 | 2006-06-07 | 乐金电子(天津)电器有限公司 | Oil separator mounted with heater |
| CN101256042A (en) * | 2008-04-16 | 2008-09-03 | 清华大学 | Large temperature rise compression heat pump units |
| WO2014185525A1 (en) * | 2013-05-16 | 2014-11-20 | 国立大学法人佐賀大学 | Energy conversion system |
| CN105823279A (en) * | 2016-04-11 | 2016-08-03 | 广东美的暖通设备有限公司 | Control method for starting or stopping of electric heating band of oil separator of air-conditioner |
| CN111380257A (en) * | 2020-03-30 | 2020-07-07 | 上海南进热能技术有限公司 | Heat pump for realizing non-stop defrosting by utilizing waste heat of cylinder sleeve water of internal combustion engine |
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