CN110593975B - Organic Rankine and inverse Carnot cycle coupling waste heat recovery system - Google Patents
Organic Rankine and inverse Carnot cycle coupling waste heat recovery system Download PDFInfo
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- CN110593975B CN110593975B CN201910865977.2A CN201910865977A CN110593975B CN 110593975 B CN110593975 B CN 110593975B CN 201910865977 A CN201910865977 A CN 201910865977A CN 110593975 B CN110593975 B CN 110593975B
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- 239000002918 waste heat Substances 0.000 title claims abstract description 36
- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 230000008878 coupling Effects 0.000 title claims abstract description 13
- 238000010168 coupling process Methods 0.000 title claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 13
- 239000000498 cooling water Substances 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000002441 reversible effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 15
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000010687 lubricating oil Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002440 industrial waste Substances 0.000 description 3
- 230000002427 irreversible effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- OOYGSFOGFJDDHP-KMCOLRRFSA-N kanamycin A sulfate Chemical group OS(O)(=O)=O.O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CN)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O[C@@H]2[C@@H]([C@@H](N)[C@H](O)[C@@H](CO)O2)O)[C@H](N)C[C@@H]1N OOYGSFOGFJDDHP-KMCOLRRFSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
-
- 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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D1/00—Devices using naturally cold air or cold water
- F25D1/02—Devices using naturally cold air or cold water using naturally cold water, e.g. household tap water
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model provides an organic Rankine and waste heat recovery system of contrary Carnot cycle coupling, relates to waste heat recovery technical field, and this organic Rankine and waste heat recovery system of contrary Carnot cycle coupling includes the condenser, the condenser intercommunication has the three-way valve, the one port intercommunication of three-way valve has organic Rankine cycle system, the other port intercommunication of three-way valve has contrary Carnot cycle system, organic Rankine cycle system contrary Carnot cycle system respectively with the condenser intercommunication forms the return circuit. According to the invention, the organic Rankine cycle system is used for providing electric energy, meanwhile, cooling water with the temperature of 7 ℃ generated by the inverse Carnot cycle system is used for cooling a room and equipment on site, so that the consumption of external electric energy or fossil energy is reduced, the energy utilization rate is improved, the greenhouse effect and the atmospheric pollution are avoided, meanwhile, the organic Rankine cycle system and the inverse Carnot cycle system share one condenser, the independent start-stop effect can be achieved through the three-way valve, and the initial investment and the equipment occupation area are saved.
Description
Technical Field
The invention relates to the technical field of waste heat recovery, in particular to a waste heat recovery system with organic Rankine and inverse Carnot cycle coupling.
Background
Low-grade industrial waste heat, waste heat and renewable heat are attracting attention due to their huge total amount. A large amount of flue gas below 200 ℃ is discharged in the industrial production process, and is not reused. The production processes generally supply heat in the traditional modes of burning fossil fuel or electric heating and the like at the cost of consuming high-grade energy, which not only reduces the utilization grade of the energy, but also causes waste of a large amount of waste heat resources and causes certain thermal pollution to the environment.
Organic Rankine cycle: the organic Rankine cycle is one of effective means for recycling low-temperature industrial waste heat, the energy recycling efficiency of the organic Rankine cycle unit is only about 10%, and a large amount of industrial waste heat is still not fully utilized. The working process is that the working medium pump conveys the working medium to the evaporator, the working medium is vaporized in the evaporator due to heat absorption, the generated steam enters the expander to expand and do work, the expander is driven to rotate, the generator is driven to generate power, the low-pressure steam after doing work enters the condenser to release heat and cool, and then returns to the working medium pump to enter circulation.
Patent number 201510198714.2 discloses a coupling system of organic Rankine cycle and heat pump cycle, but the system can not simultaneously produce cold and electric energy, and does not solve the problem that a room on site needs to be cooled and field equipment needs to be cooled, so that external electric energy or fossil energy is consumed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the waste heat recovery system with the organic Rankine and inverse Kano cycle coupling, the waste heat recovery system with the organic Rankine and inverse Kano cycle coupling can simultaneously provide cold and electric energy, the provided cold energy can cool a room and equipment on site, and the consumption of external electric energy or fossil energy is reduced, so that the energy utilization rate is improved, and the greenhouse effect and the atmospheric pollution are avoided.
The aim of the invention is achieved by the following technical scheme:
The utility model provides a waste heat recovery system of organic Rankine and contrary Carnot cycle coupling, including the condenser, the condenser intercommunication has the three-way valve, the one port intercommunication of three-way valve has organic Rankine cycle system, another port intercommunication of three-way valve has contrary Carnot cycle system, organic Rankine cycle system contrary Carnot cycle system respectively with the condenser intercommunication forms the return circuit. The organic Rankine cycle system is used for providing electric energy, meanwhile, cooling water at 7 ℃ generated by the inverse Carnot cycle system is used for cooling a room and equipment on site, so that the consumption of external electric energy or fossil energy is reduced, the energy utilization rate is improved, the greenhouse effect and the atmospheric pollution are avoided, meanwhile, the organic Rankine cycle system and the inverse Carnot cycle system share one condenser, the independent start-stop effect can be achieved through the three-way valve, and the initial investment and the equipment occupation area are saved.
Further, the organic Rankine cycle system comprises a low-pressure working medium pump communicated with one port of the three-way valve, a heat regenerator communicated with the low-pressure working medium pump, a preheater communicated with the heat regenerator, a gas-liquid separator communicated with the preheater, a high-pressure working medium pump communicated with a lower outlet of the gas-liquid separator, a first evaporator communicated with the high-pressure working medium pump, a first expander communicated with the first evaporator, and a first generator communicated with the first expander.
Further, the upper outlet of the gas-liquid separator is communicated with a second expander, and the second expander is communicated with a second generator. By adopting the gas-liquid separator and the second expander and selecting proper intermediate pressure, the irreversible loss in the variable-temperature waste heat recovery process can be effectively reduced, the waste heat recovery efficiency can be effectively improved, and the electric output power can be increased.
Further, the first expander is further communicated with a reheater, the reheater is communicated with the second expander, the second expander is communicated with the reheater, and the reheater is communicated with the condenser to form a loop. When proper reheating pressure is selected, the output work and the circulating heat absorption capacity of the expander are increased, and the organic Rankine cycle adopting the reheater is suitable for the conditions of higher heat source temperature and higher evaporator superheat degree, because the outlet temperature of the expander is higher under the conditions, the system is provided with a plurality of heat exchange devices of the preheater, the evaporator and the reheater for fully utilizing the waste heat source, so that the outlet temperature of the expander is higher, and the recycling value is realized. The back-heating organic Rankine cycle reduces the heat absorption capacity required by the evaporator and can remarkably improve the first law efficiencyThe work of the working medium pump and the expansion machine is unchanged, the heat absorption capacity of the evaporator is reduced, and the first law efficiency is increased.
Further, the reverse Carnot circulation system comprises a working medium flow regulating valve communicated with the other port of the three-way valve, an electronic expansion valve communicated with the working medium flow regulating valve, a second evaporator communicated with the electronic expansion valve, and a compressor communicated with the second evaporator, wherein the compressor and the condenser are communicated to form a loop.
Further, the reverse Carnot circulation system also comprises a cooling water circulation system, wherein the cooling water circulation system comprises a circulating cooling water channel, a circulating water pump arranged on the circulating water channel and a cooling water flow regulating valve arranged on the circulating water channel. Cooling water with the temperature of 7 ℃ generated by the inverse Carnot circulation system is cooled to a room and equipment on site through the cooling water circulation system, so that the room can obtain a refrigerating effect without adding air conditioning equipment, wherein the site comprises, but is not limited to, a steel plant, a thermal power plant and the like, and the room comprises, but is not limited to, an equipment main control room, a monitoring room and the like.
Further, the circulating cooling water channel is arranged in the second evaporator and the heat exchange end in the room, and the circulating water pump is arranged between the second evaporator and the heat exchange end in the room. Including but not limited to fan coils, floor radiant, radiator fins, etc.
Further, the circulating cooling water channel is divided into two paths after passing through the heat exchange end in the room, the first path is communicated with the circulating cooling water channel in the second evaporator to form a loop through the second generator and the first generator in sequence, and the cooling water flow regulating valve is arranged in the first path and is positioned between the heat exchange end in the room and the second generator.
Further, the second path is communicated with the circulating cooling water channel arranged in the second evaporator through an oil pool to form a loop. For places such as steel plants and thermal power plants which need waste heat recovery, circulating lubricating oil generally exists, in the process of lubricating oil, a large amount of heat is absorbed by friction or heat dissipation of equipment, the oil temperature is increased, the oil temperature is changed due to the increase of the oil temperature, the quality of the oil is affected, the equipment is abnormal, and the second path of the circulating cooling water channel can cool an oil pool, so that the problems are solved.
The invention has the beneficial effects that: the invention relates to a waste heat recovery system with organic Rankine and inverse Carnot cycle coupling, which comprises a condenser, wherein a three-way valve is communicated with the condenser, one port of the three-way valve is communicated with an organic Rankine cycle system, the other port of the three-way valve is communicated with an inverse Carnot cycle system, the organic Rankine cycle system and the inverse Carnot cycle system are respectively communicated with the condenser to form a loop.
Drawings
The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the invention, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.
Fig. 1 is a schematic diagram of the overall structure of an organic rankine and inverse carnot cycle coupled waste heat recovery system according to the present invention.
The figure comprises the following components:
Condenser 1, three-way valve 2, low pressure working medium pump 3, regenerator 4, pre-heater 5, gas-liquid separator 6, high pressure working medium pump 7, first evaporator 8, first expander 9, first generator 10, second expander 11, second generator 12, re-heater 13, working medium flow control valve 14, electronic expansion valve 15, second evaporator 16, compressor 17, circulating water pump 18, cooling water flow control valve 19.
Detailed Description
The invention will be further described with reference to the following examples.
Example 1
The waste heat recovery system of organic Rankine and inverse Carnot cycle coupling of this embodiment, as shown in FIG. 1, includes a condenser 1, the condenser 1 communicates there is three-way valve 2, the one port intercommunication of three-way valve 2 has organic Rankine cycle system, the other port intercommunication of three-way valve 2 has inverse Carnot cycle system, organic Rankine cycle system inverse Carnot cycle system respectively with the condenser 1 intercommunication forms the return circuit. The organic Rankine cycle system is used for providing electric energy, meanwhile, cooling water at 7 ℃ generated by the inverse Carnot cycle system is used for cooling a room and equipment on site, so that the consumption of external electric energy or fossil energy is reduced, the energy utilization rate is improved, the greenhouse effect and the atmospheric pollution are avoided, meanwhile, the organic Rankine cycle system and the inverse Carnot cycle system share the condenser 1, the independent start-stop effect can be achieved through the three-way valve 2, and the initial investment and the equipment occupation area are saved.
The organic Rankine cycle system comprises a low-pressure working medium pump 3 communicated with one port of the three-way valve 2, a heat regenerator 4 communicated with the low-pressure working medium pump 3, a preheater 5 communicated with the heat regenerator 4, a gas-liquid separator 6 communicated with the preheater 5, a high-pressure working medium pump 7 communicated with a lower outlet of the gas-liquid separator 6, a first evaporator 8 communicated with the high-pressure working medium pump 7, a first expander 9 communicated with the first evaporator 8, and a first generator 10 communicated with the first expander 9.
The upper outlet of the gas-liquid separator 6 is communicated with a second expander 11, and the second expander 11 is communicated with a second generator 12. By adopting the gas-liquid separator 6 and the second expander 11 and selecting proper intermediate pressure, the irreversible loss in the variable-temperature waste heat recovery process can be effectively reduced, the waste heat recovery efficiency can be effectively improved, and the electric output power can be increased.
The first expander 9 is further communicated with a reheater 13, the reheater 13 is communicated with the second expander 11, the second expander 11 is communicated with the regenerator 4, and the regenerator 4 is communicated with the condenser 1 to form a loop. When proper reheating pressure is selected by adopting the organic Rankine cycle of the reheater 13, the output work and the circulating heat absorption capacity of the expander are increased, and the organic Rankine cycle of the reheater 4 is suitable for the conditions of higher heat source temperature and higher evaporator superheat degree, because the outlet temperature of the expander is higher under the conditions, the system is provided with a plurality of heat exchange devices of the preheater, the evaporator and the reheater in order to fully utilize the waste heat source, so that the outlet temperature of the expander is higher, and the recycling value is realized. The back-heating organic Rankine cycle reduces the heat absorption capacity required by the evaporator and can remarkably improve the first law efficiencyThe work of the working medium pump and the expansion machine is unchanged, the heat absorption capacity of the evaporator is reduced, and the first law efficiency is increased.
The reverse Carnot circulation system comprises a working medium flow regulating valve 14 communicated with the other port of the three-way valve 2, an electronic expansion valve 15 communicated with the working medium flow regulating valve 14, a second evaporator 16 communicated with the electronic expansion valve 15, and a compressor 17 communicated with the second evaporator 16, wherein the compressor 17 is communicated with the condenser 1 to form a loop.
The reverse Carnot circulation system also comprises a cooling water circulation system, wherein the cooling water circulation system comprises a circulating cooling water channel, a circulating water pump 18 arranged on the circulating water channel and a cooling water flow regulating valve 19 arranged on the circulating water channel. Cooling water with the temperature of 7 ℃ generated by the inverse Carnot circulation system is cooled to a room and equipment on site through the cooling water circulation system, so that the room can obtain a refrigerating effect without adding air conditioning equipment, wherein the site comprises, but is not limited to, a steel plant, a thermal power plant and the like, and the room comprises, but is not limited to, an equipment main control room, a monitoring room and the like.
The circulating cooling water passage is provided in the second evaporator 16, the heat exchange end in the room, and the circulating water pump 18 is provided between the second evaporator 16 and the heat exchange end in the room. Including but not limited to fan coils, floor radiant, radiator fins, etc.
The circulating cooling water channel is divided into two paths after passing through the heat exchange end in the room, the first path is communicated with the circulating cooling water channel arranged in the second evaporator 16 through the second generator 12 and the first generator 10 in sequence to form a loop, and the cooling water flow regulating valve 19 is arranged in the first path and is positioned between the heat exchange end in the room and the second generator 12.
The second path is communicated with the circulating cooling water passage provided in the second evaporator 16 through an oil pool to form a loop. For places such as steel plants and thermal power plants which need waste heat recovery, circulating lubricating oil generally exists, in the process of lubricating oil, a large amount of heat is absorbed by friction or heat dissipation of equipment, the oil temperature is increased, the oil temperature is changed due to the increase of the oil temperature, the quality of the oil is affected, the equipment is abnormal, and the second path of the circulating cooling water channel can cool an oil pool, so that the problems are solved.
Organic Rankine cycle system working principle:
after condensing, releasing heat and liquefying a working medium at a condenser 1, pressurizing the working medium through a three-way valve 2 and a low-pressure working medium pump 3, performing heat exchange with the working medium at an outlet of an expansion machine in a heat regenerator 4 to cause temperature rise, then entering a preheater 5 to perform heat exchange with external waste heat, after entering a gas-liquid separator 6, enabling part of gaseous working medium to enter the second expansion machine 11 through the upper outlet of the gas-liquid separator 6 and the working medium subjected to primary expansion to perform expansion work, enabling the liquid working medium flowing out of the lower outlet of the gas-liquid separator 6 to enter a high-pressure working medium pump 7 to further pressurize and then enter a first evaporator 8, further absorbing heat and heating the working medium in the first evaporator 8, enabling the high-temperature working medium to enter the first expansion machine 9 to perform expansion work to drive a first generator 10 to generate power, enabling the working medium subjected to perform heat exchange with external waste heat, enabling the working medium subjected to enter a reheater 13 to perform heat exchange with external waste heat to mix with the gaseous working medium which is flash-heated in the gas-liquid separator 6, enabling the gaseous working medium to jointly enter the second expansion machine 11 to perform expansion work, enabling the second expansion machine 11 to drive the second expansion machine 12, enabling the working medium to output by a system to enter the high-pressure working medium to enter the first expansion machine 9 and the second expansion machine 11 to perform work, enabling the working medium to further pressurizing heat to enter the high-pressure working medium pump 7 to further heat, enabling the working medium to further heat to further enter the evaporator 1, and finally enter the heat expander 1 to perform heat after heat recovery, and the working medium is subjected to heat circulation, and the working medium is cooled.
Principle of operation of the reverse carnot cycle system:
The working medium is condensed, released and liquefied in the condenser 1, enters the electronic expansion valve 14 through the three-way valve 2 and the working medium flow regulating valve 14 to be throttled and depressurized, then enters the second evaporator 16 to absorb heat, evaporate and vaporize, absorbs the heat of external cooling water, reduces the temperature of the cooling water, enters the compressor 17 to be pressurized, and returns to the condenser 1 to complete circulation.
The working principle of the cooling water circulation system is as follows:
The temperature of the cooling water after passing through the second evaporator 16 is reduced, the cooling water enters a room through a circulating water pump 18 and exchanges heat with the room through different tail ends (such as a fan coil, floor radiation, a radiator and the like), so that the indoor temperature is reduced, the room can be but is not limited to a main control room, a room in which the operation condition of equipment is monitored on site (a steel plant, a thermal power plant and the like) is generally hotter, the cooling water after exiting the room is divided into two paths, the water flow ratio of the two paths is controlled through a cooling water flow regulating valve 19, the cooling water can also be closed, the cooling water completely passes through an oil pool, the second path enters the oil pool to cool a lubricating oil pool of field equipment, the lubricating oil is prevented from being changed due to overhigh temperature, and the first path is converged with the cooling water after respectively cooling the second generator 12 and the first generator 10 to enter the second evaporator 16 to complete circulation.
In general, through organic Rankine cycle and reverse Carnot cycle coupling, after a part of liquid working medium absorbs heat, the liquid working medium enters an expander to expand and do work to participate in the organic Rankine cycle, and the other part of liquid working medium throttles and absorbs heat and enters a compressor to participate in the reverse Carnot cycle, so that the work done by the expander drives a motor coaxially connected with the expander, and the refrigeration and electricity are supplied simultaneously. Compared with the prior art, the invention can improve the output work of the expander, the circulation efficiency and the electric efficiency of the organic Rankine, reduce the irreversible loss of circulation, solve the problem of cooling required by controlling the activities of indoor personnel and the problem of cooling a lubricating oil pool, save energy and protect environment, effectively recycle the high temperature of low-grade waste heat, reduce the consumption of electric energy or fossil energy and reduce the greenhouse effect and the atmospheric pollution due to the adoption of the modes of backheating, reheating and gas-liquid separation. The electric quantity generated by the generator of the system can be supplied to the compressor for use or can be connected with the network.
Example 2
The structure of the embodiment is the same as that of embodiment 1, except that the organic Rankine subsystem and the inverse Carnot cycle subsystem in the system can be operated independently, when waste heat resources are suspended due to the problem of factory operation, the flow path of the organic Rankine subsystem can be closed through the three-way valve 2, and only the inverse Carnot cycle flow path is opened, so that the temperature in a room can be ensured, meanwhile, the power generator does not need to be cooled because the expander does not work, and the water flow regulating valve can be completely closed, so that cooling water can be completely removed from a cooling oil tank.
Example 3
The structure of the embodiment is the same as that of embodiment 1, and the difference is that the organic Rankine subsystem and the inverse Carnot cycle subsystem in the system can operate independently, the three-way valve 2 is closed to the inverse Carnot cycle flow path, and only the organic Rankine cycle flow path is opened, namely, the waste heat recovery power generation function of the organic Rankine is realized, the system is suitable for low heat source flow, the work of the expander is not much, the rotating speed of the generator is not high, and the heat dissipation of the generator can meet the operation condition.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. Organic Rankine and contrary waste heat recovery system of Carnot cycle coupling, including the condenser, its characterized in that: the condenser is communicated with a three-way valve, one port of the three-way valve is communicated with an organic Rankine cycle system, the other port of the three-way valve is communicated with an inverse Carnot cycle system, and the organic Rankine cycle system and the inverse Carnot cycle system are respectively communicated with the condenser to form a loop; the organic Rankine cycle system comprises a low-pressure working medium pump communicated with one port of the three-way valve, a heat regenerator communicated with the low-pressure working medium pump, a preheater communicated with the heat regenerator, a gas-liquid separator communicated with the preheater, a high-pressure working medium pump communicated with a lower outlet of the gas-liquid separator, a first evaporator communicated with the high-pressure working medium pump, a first expander communicated with the first evaporator, and a first generator communicated with the first expander; the upper outlet of the gas-liquid separator is communicated with a second expander, and the second expander is communicated with a second generator.
2. An organic rankine and inverse carnot cycle coupled waste heat recovery system as claimed in claim 1 wherein: the first expander is further communicated with a reheater, the reheater is communicated with the second expander, the second expander is communicated with the heat regenerator, and the heat regenerator is communicated with the condenser to form a loop.
3. An organic rankine and inverse carnot cycle coupled waste heat recovery system as claimed in claim 1 wherein: the reverse Carnot circulation system comprises a working medium flow regulating valve communicated with the other port of the three-way valve, an electronic expansion valve communicated with the working medium flow regulating valve, a second evaporator communicated with the electronic expansion valve, and a compressor communicated with the second evaporator, wherein the compressor and the condenser are communicated to form a loop.
4. A waste heat recovery system coupled with an organic rankine and reverse carnot cycle as set forth in claim 3 wherein: the reverse Carnot circulation system also comprises a cooling water circulation system, wherein the cooling water circulation system comprises a circulating cooling water channel, a circulating water pump arranged on the circulating cooling water channel and a cooling water flow regulating valve arranged on the circulating cooling water channel.
5. The organic rankine and inverse carnot cycle coupled waste heat recovery system of claim 4, wherein: the circulating cooling water channel is arranged in the second evaporator and the heat exchange end in the room, and the circulating water pump is arranged between the second evaporator and the heat exchange end in the room.
6. The organic rankine and inverse carnot cycle coupled waste heat recovery system of claim 5, wherein: the circulating cooling water channel is divided into two paths after passing through the heat exchange end in the room, the first path is communicated with the circulating cooling water channel in the second evaporator through the second generator and the first generator in sequence to form a loop, and the cooling water flow regulating valve is arranged in the first path and is positioned between the heat exchange end in the room and the second generator.
7. The organic rankine and inverse carnot cycle coupled waste heat recovery system of claim 6, wherein: the second path is communicated with the circulating cooling water channel arranged in the second evaporator through an oil pool to form a loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910865977.2A CN110593975B (en) | 2019-09-09 | 2019-09-09 | Organic Rankine and inverse Carnot cycle coupling waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910865977.2A CN110593975B (en) | 2019-09-09 | 2019-09-09 | Organic Rankine and inverse Carnot cycle coupling waste heat recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN110593975A CN110593975A (en) | 2019-12-20 |
| CN110593975B true CN110593975B (en) | 2024-10-25 |
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| CN107605556A (en) * | 2017-10-09 | 2018-01-19 | 同济大学 | It is related to the organic Rankine bottoming cycle of air conditioner afterheat recycling（ORC）Electricity generation system |
| CN211082000U (en) * | 2019-09-09 | 2020-07-24 | 珠海格力电器股份有限公司 | Organic Rankine and reverse Carnot cycle coupled waste heat recovery system |
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| CN103590863B (en) * | 2013-11-21 | 2017-11-24 | 孟宁 | A kind of Kano-organic Rankine Two-way Cycle mixed high-efficient electricity generation system |
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| CN211082000U (en) * | 2019-09-09 | 2020-07-24 | 珠海格力电器股份有限公司 | Organic Rankine and reverse Carnot cycle coupled waste heat recovery system |
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