CN105698432A - Multi-functional-mode CO2 refrigeration and power generation combined circulating system and mode switching control method - Google Patents
Multi-functional-mode CO2 refrigeration and power generation combined circulating system and mode switching control method Download PDFInfo
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- CN105698432A CN105698432A CN201610043859.XA CN201610043859A CN105698432A CN 105698432 A CN105698432 A CN 105698432A CN 201610043859 A CN201610043859 A CN 201610043859A CN 105698432 A CN105698432 A CN 105698432A
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
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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
- F25B2327/00—Refrigeration system using an engine for driving a compressor
- F25B2327/001—Refrigeration system using an engine for driving a compressor of the internal combustion type
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/06—Several compression cycles arranged in parallel
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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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
- F25B2500/00—Problems to be solved
- F25B2500/01—Geometry problems, e.g. for reducing size
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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
- F25B2500/00—Problems to be solved
- F25B2500/09—Improving heat transfers
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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
- F25B2500/00—Problems to be solved
- F25B2500/17—Size reduction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a multi-functional-mode CO2 refrigeration and power generation combined circulating system suitable for exhaust waste heat recovery of an internal combustion engine. The system comprises the internal combustion engine, a heater, an expansion machine, a coupling, a power generator, a low-pressure cooler, an air storage tank, a stop valve, an evaporator, an expansion valve, a flow-dividing three-way valve, a medium-pressure cooler, a primary compressor and a secondary compressor. The primary compressor and the secondary compressor are in shaft connection with the expansion machine and are driven by the expansion machine. The system adopts CO2 as a circulating working medium and adopts high-temperature exhaust of the internal combustion engine as an input heat source of the heater. According to the circulating system provided by the invention, system components are reduced and a driving component is shared; and switching among three functional modes, namely a complete refrigeration mode, a refrigeration and power generation combined mode and a complete power generation mode can be realized by controlling and adjusting different states of the flow-dividing three-way valve, the stop valve and the coupling.
Description
Technical field
The invention belongs to afterheat of IC engine and utilize technology, be specifically related to a kind of multifunctional mode CO utilized suitable in internal combustion engine high-temperature exhaust air2Cold electricity combined cycle system。
Background technology
The efficiency of Vehicular internal combustion engine only has 30%～45%, and its complementary energy is taken away by aerofluxus, jacket-cooling water and lubrication wet goods。Wherein, internal-combustion engine delivery temperature is high, and recoverable energy is big, if can be used by exhaust heat, it is possible to be effectively improved the thermal efficiency of internal combustion engine。
At present, exhaust heat of internal combustion engine is recycled as two kinds of purposes cold, electric and receives increasingly extensive concern。For vehicular engine, waste heat recovery gained electric energy can as needed for the electricity consumption of automobile-used auxiliary electrical equipment, and gained cold can as needed for air-conditioning in car。At present, the main organic Rankine bottoming cycle technology that adopts of generating, refrigeration is main adopts absorption or adsorptive refrigeration technology。If be directly coupled together by these generation technologies, then system is huge, regulates difficulty, and there is the safety and environmental protection problem of organic working medium and cold-producing medium。If only with a kind of environmental protection and safety type working medium, realize generating and refrigeration simultaneously, this situation will be efficiently solved。CO2Working medium, as a kind of environmental safety working medium, can, as the working medium of power generation cycle, also be both a kind of good refrigeration working medium, has the potentiality closing cycle fluid as cold Electricity Federation。Meanwhile, CO2Flowing that working medium is good and heat transfer character, be also beneficial to the miniaturization of waste heat recovery apparatus。On the other hand, on vehicle, electricity is change with the use of cold, and cooling load only uses in hot weather, and electric energy can store in the battery。When there is no refrigeration demand, it should exhaust heat is used for power generation needs。Therefore it is also required to residual neat recovering system and can accomplish freely switching of cold power mode。
Summary of the invention
For prior art scenario, the present invention proposes a kind of multifunctional mode CO suitable in internal combustion engine high-temperature exhaust air UTILIZATION OF VESIDUAL HEAT IN2Cold electricity combined cycle system, meets cold electricity demand simultaneously, and realizes the switching of cold electricity multifunctional mode。
In order to solve above-mentioned technical problem, a kind of multifunctional mode CO that the present invention proposes2Cold electricity combined cycle system, including internal combustion engine, heater, decompressor, electromotor, low pressure cooler, air accumulator, vaporizer, middle pressure cooler, first order compressor and high stage compressor；The high-temperature exhaust air of described internal combustion engine is as the thermal source of described heater；Described first order compressor, high stage compressor and expander shaft connect, and described first order compressor and described high stage compressor drive by described decompressor；Described decompressor is connected with described electromotor by a shaft coupling；The air inlet of described second machine compressor, the high temperature side outlet of medium pressure cooler and the high temperature side import of described vaporizer are connected on three mouths of a diversion three-way valve respectively through pipeline；The air vent of described second machine compressor is connected to the import of described decompressor by the low temperature side passage of described heater；The outlet of described decompressor is connected to the import of described air accumulator by the high temperature side passage of described low pressure cooler, the outlet of described air accumulator is connected to the air inlet of described first order compressor, and the air vent of described first order compressor is connected to the high temperature side import of medium pressure cooler；The high temperature side outlet of described vaporizer is connected with the import of described air accumulator, and the connecting line between described vaporizer and air accumulator is provided with a stop valve；Connecting line between described vaporizer and described diversion three-way valve is provided with an expansion valve；The working medium of blood circulation is CO2, working medium is tapped two-way by described diversion three-way valve after medium pressure cooler, and a road is refrigerating circuit: enter described vaporizer output cold after the throttling cooling of described expansion valve to chilled water；Another road is power generation circuit: entering decompressor acting after the compression of described high stage compressor and heater heating successively, drawing generator generates electricity, and then cools down through described low pressure cooler；The working medium of above-mentioned refrigerating circuit and power generation circuit in described air accumulator interflow mixing after by described first order compressor after be back to medium pressure cooler。
Adopt above-mentioned multifunctional mode CO2Cold electricity combined cycle system, by regulating the state of described diversion three-way valve, stop valve and shaft coupling, it is achieved the switching of full refrigeration mode, combined power and cooling pattern and full power generation mode。
Realize full refrigeration mode: described shaft coupling disconnects, described stop valve is opened, described diversion three-way valve regulation enters the working medium flow of described power generation circuit, so that described decompressor does work needed for the use energy meeting described first order compressor and high stage compressor, all the other working medium is used for refrigerating circuit；
Realize combined power and cooling pattern: described shaft coupling connects, described stop valve is opened, described diversion three-way valve regulation enters the working medium flow of described refrigerating circuit, meet the cooling load set, all the other working medium is for the acting of described decompressor, and the acting of described decompressor provides energy for described first order compressor, high stage compressor and electromotor；
Realizing full power generation mode: described shaft coupling connects, described stop valve disconnects, and the cut-off of described diversion three-way valve enters the working medium flow of described refrigerating circuit, and working medium all flows into described power generation circuit after medium pressure cooler and is used for generating electricity。
Compared with prior art, the invention has the beneficial effects as follows:
This blood circulation is integrated with vehicle (internal combustion engine) residual neat recovering system and refrigeration system, decreases system unit, common drive parts；This system can accomplish the switching of multifunctional mode, it may be achieved full refrigeration mode, combined power and cooling pattern, three kinds of functional modes of full power generation mode；CO2Working medium safety and environmental protection, the use of energy good match high-temperature exhaust air, good heat exchange property makes the size of circulation member reduce；CO2Working medium can not only meet the air conditioner refrigerating of more than 0 DEG C, meets the requirement of low temperature (such as refrigerator car, fishing boat ice making) of less than 0 DEG C simultaneously, is thus advantageous to this cold electricity system use in each field。
Accompanying drawing explanation
Fig. 1 is multifunctional mode CO of the present invention2Cold electricity combined cycle system is constituted and schematic diagram；Wherein, dotted line represents I. C. engine exhaust path, and dotted line represents water side path, and heavy line represents CO2Working medium path。
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical solution of the present invention being described in further detail, the present invention is only explained by described specific embodiment, not in order to limit the present invention。
As it is shown in figure 1, multifunctional mode CO of the present invention2Cold electricity combined cycle system, its system structure specifically comprises: internal combustion engine 1, heater 2, decompressor 3, shaft coupling 4, electromotor 5, low pressure cooler 6, air accumulator 7, stop valve 8, vaporizer 9, expansion valve 10, diversion three-way valve 11, middle pressure cooler 12, first order compressor 13, high stage compressor 14。
Annexation between each part mentioned above is:
The high-temperature exhaust air mouth of described internal combustion engine 1 is connected to the high temperature side passage of heater 2, thus providing thermal source for described heater 2；Described first order compressor 13, high stage compressor 14 and decompressor 3 axle connect, and described first order compressor 13 and described high stage compressor 14 drive by described decompressor 3；Described decompressor 3 is connected with described electromotor 5 by described shaft coupling 4。
The air inlet of described second machine compressor 14, the high temperature side outlet of medium pressure cooler 12 and the high temperature side import of described vaporizer 9 are connected on three mouths of described diversion three-way valve 11 respectively through pipeline。
The air vent of described second machine compressor 14 is connected to the import of described decompressor 3 by the low temperature side passage of described heater 2；The outlet of described decompressor 3 is connected to the import of described air accumulator 7 by the high temperature side passage of described low pressure cooler 6, the outlet of described air accumulator 7 is connected to the air inlet of described first order compressor 13, and the air vent of described first order compressor 13 is connected to the high temperature side import of medium pressure cooler 12。The high temperature side outlet of described vaporizer 9 is also connected with the import of described air accumulator 7, and described stop valve 8 is arranged on the connecting line between described vaporizer 9 and air accumulator 7；Described expansion valve 10 is arranged on the connecting line between described vaporizer 9 and described diversion three-way valve 11。
The working medium of above-mentioned blood circulation is CO2, the work process of its blood circulation is: CO2Working medium is tapped two-way by described diversion three-way valve 11 after medium pressure cooler 12, and a road is refrigerating circuit: enters described vaporizer 9 after the throttling cooling of described expansion valve 10 and exports cold to chilled water；Another road is power generation circuit: entering decompressor 3 after the compression of described high stage compressor 14 and heater 2 heating successively and do work, drawing generator 5 generates electricity, and then cools down through described low pressure cooler 6。The working medium of above-mentioned refrigerating circuit and power generation circuit, after described air accumulator 7 interflow is sufficiently mixed, by being back to medium pressure cooler 12 after described first order compressor 13, so far completes a workflow。
By controlling to adjust the state of described diversion three-way valve 11, stop valve 8 and shaft coupling 4, it may be achieved the switching between full refrigeration mode, combined power and cooling pattern and complete three kinds of functional modes of power generation mode。Specifically:
Full refrigeration mode: described shaft coupling 4 disconnects, described stop valve 8 is opened, described diversion three-way valve 11 regulates the working medium flow entering described power generation circuit, so that described decompressor 3 does work needed for the use energy meeting described first order compressor 13 and high stage compressor 14, all the other working medium is used for refrigerating circuit；
Combined power and cooling pattern: described shaft coupling 4 connects, described stop valve 8 is opened, described diversion three-way valve 11 regulates the working medium flow entering described refrigerating circuit, meet the cooling load set, all the other working medium is done work for described decompressor 3, dump energy, except doing work for described first order compressor 13, high stage compressor 14, is used for electromotor 5 and generates electricity by expansion work。
Full power generation mode: described shaft coupling 4 connects, described stop valve 8 disconnects, and the cut-off of described diversion three-way valve 11 enters the working medium flow of described refrigerating circuit, and working medium all flows into described power generation circuit after medium pressure cooler 12 and is used for generating electricity。
For a 84kW gasoline engine, the performance for realizing above-mentioned Three models illustrates。The design conditions of bootstrap system are taken as: I. C. engine exhaust temperature 785 DEG C, the inlet temperature of working medium decompressor 755 DEG C, and cryogenic temperature is 5 DEG C, cool down 25 DEG C of water, and the efficiency of decompressor is 0.7, and two stages of compression engine efficiency is 0.8。According to cycle calculations, refrigeration, combined power and cooling and full generating Three models has related parameter and cycle performance index as shown in table 1 entirely。
Table 1 the present embodiment performance indications
As shown in Table 1, maximum cooling capacity is 37.5kW, fully meets the refrigeration demand of 80kW vehicle, therefore, the switching of multifunctional mode is conducive to, after meeting certain refrigeration demand, dump energy being converted into electrical power storage, it is possible to give full play to maximum UTILIZATION OF VESIDUAL HEAT IN potentiality。
Although above in conjunction with accompanying drawing, invention has been described; but the invention is not limited in above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is merely schematic; rather than it is restrictive; those of ordinary skill in the art is under the enlightenment of the present invention; without deviating from the spirit of the invention, it is also possible to make many variations, these belong within the protection of the present invention。
Claims (3)
1. a multifunctional mode CO2Cold electricity combined cycle system, including internal combustion engine (1), heater (2), decompressor (3), electromotor (5), low pressure cooler (6), air accumulator (7), vaporizer (9), middle pressure cooler (12), first order compressor (13) and high stage compressor (14)；The high-temperature exhaust air of described internal combustion engine (1) is as the thermal source of described heater (2)；Described first order compressor (13), high stage compressor (14) and decompressor (3) axle connect, and described first order compressor (13) and described high stage compressor (14) drive by described decompressor (3)；It is characterized in that:
Described decompressor (3) is connected with described electromotor (5) by a shaft coupling (4)；
The air inlet of described second machine compressor (14), the high temperature side outlet of medium pressure cooler (12) and the high temperature side import of described vaporizer (9) are connected on three mouths of a diversion three-way valve (11) respectively through pipeline；
The air vent of described second machine compressor (14) is connected to the import of described decompressor (3) by the low temperature side passage of described heater (2)；
The outlet of described decompressor (3) is connected to the import of described air accumulator (7) by the high temperature side passage of described low pressure cooler (6), the outlet of described air accumulator (7) is connected to the air inlet of described first order compressor (13), and the air vent of described first order compressor (13) is connected to the high temperature side import of medium pressure cooler (12)；
The high temperature side outlet of described vaporizer (9) is connected with the import of described air accumulator (7), and the connecting line between described vaporizer (9) and air accumulator (7) is provided with a stop valve (8)；Connecting line between described vaporizer (9) and described diversion three-way valve (11) is provided with an expansion valve (10)；
The working medium of blood circulation is CO2Working medium is tapped two-way by described diversion three-way valve (11) after medium pressure cooler (12), and a road is refrigerating circuit: enter described vaporizer (9) output cold after described expansion valve (10) throttling cooling to chilled water；Another road is power generation circuit: enter decompressor (3) acting after described high stage compressor (14) compression and heater (2) heating successively, drawing generator (5) generates electricity, and then cools down through described low pressure cooler (6)；The working medium of above-mentioned refrigerating circuit and power generation circuit in described air accumulator (7) interflow mixing after by described first order compressor (13) after be back to medium pressure cooler (12)。
2. a multifunctional mode CO2The mode switch control method of cold electricity combined cycle system, it is characterised in that adopt multifunctional mode CO as claimed in claim 12Cold electricity combined cycle system, by regulating the state of described diversion three-way valve (11), stop valve (8) and shaft coupling (4), it is achieved the switching of full refrigeration mode, combined power and cooling pattern and full power generation mode。
3. multifunctional mode CO according to claim 22The mode switch control method of cold electricity combined cycle system, it is characterised in that:
Full refrigeration mode: described shaft coupling (4) disconnects, described stop valve (8) is opened, described diversion three-way valve (11) regulates the working medium flow entering described power generation circuit, so that described decompressor (3) does work needed for the use energy meeting described first order compressor (13) and high stage compressor (14), all the other working medium is used for refrigerating circuit；
Combined power and cooling pattern: described shaft coupling (4) connects, described stop valve (8) is opened, described diversion three-way valve (11) regulates the working medium flow entering described refrigerating circuit, meet the cooling load set, all the other working medium is for described decompressor (3) acting, and described decompressor (3) acting provides energy for described first order compressor (13), high stage compressor (14) and electromotor (5)；
Full power generation mode: described shaft coupling (4) connects, described stop valve (8) disconnects, the cut-off of described diversion three-way valve (11) enters the working medium flow of described refrigerating circuit, and working medium all flows into described power generation circuit after medium pressure cooler (12) and is used for generating electricity。
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| CN106839516A (en) * | 2017-02-16 | 2017-06-13 | 中节能城市节能研究院有限公司 | A kind of coal gasification CO2Carrier gas energy conserving system |
| CN106930827A (en) * | 2017-03-13 | 2017-07-07 | 新奥泛能网络科技股份有限公司 | A kind of CCHP energy supplying system, method and device |
| CN107179788A (en) * | 2017-05-26 | 2017-09-19 | 四川开山新玛能源科技有限公司 | A kind of control method of the classification series connection cooling system of low temperature hot fluid |
| CN107246739A (en) * | 2017-06-02 | 2017-10-13 | 北京理工大学 | Hydrogen internal combustion engine automobile high pressure hydrogen refrigerating plant |
| CN107702367A (en) * | 2017-09-26 | 2018-02-16 | 西安交通大学 | A kind of driving combined power and cooling system of low-temperature heat source based on carbon dioxide working medium and method of work |
| CN109844423A (en) * | 2016-07-26 | 2019-06-04 | 高效能源有限责任公司 | Heat pump system with the heat pump assembly coupled in input side and outlet side |
| CN110849014A (en) * | 2019-10-17 | 2020-02-28 | 安徽正刚新能源科技有限公司 | Energy recovery system of MW-level transcritical carbon dioxide cold-hot combined supply device |
| US10830500B2 (en) | 2016-07-26 | 2020-11-10 | Efficient Energy Gmbh | Heat pump system having CO2 as the first heat pump medium and water as the second heat pump medium |
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| US10830500B2 (en) | 2016-07-26 | 2020-11-10 | Efficient Energy Gmbh | Heat pump system having CO2 as the first heat pump medium and water as the second heat pump medium |
| US11137172B2 (en) | 2016-07-26 | 2021-10-05 | Efficient Energy Gmbh | Heat pump system having heat pump assemblies coupled on the input side and output side |
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| CN111952635A (en) * | 2020-08-18 | 2020-11-17 | 东风汽车集团有限公司 | Adjustable air supply device for fuel cell system |
| CN112856848A (en) * | 2021-03-08 | 2021-05-28 | 中国科学技术大学 | CO of multi-functional refrigeration mode2Combined cooling and power generation system |
| CN114508869A (en) * | 2022-03-07 | 2022-05-17 | 郑州轻工业大学 | Solar energy-wind energy coupled cold-electricity combined energy source system |
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