CN114396732B - Component separation type ORC coupling VCR system based on mixed working medium - Google Patents
Component separation type ORC coupling VCR system based on mixed working medium Download PDFInfo
- Publication number
- CN114396732B CN114396732B CN202210059635.3A CN202210059635A CN114396732B CN 114396732 B CN114396732 B CN 114396732B CN 202210059635 A CN202210059635 A CN 202210059635A CN 114396732 B CN114396732 B CN 114396732B
- Authority
- CN
- China
- Prior art keywords
- working medium
- output end
- input end
- component separation
- temperature condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000926 separation method Methods 0.000 title claims abstract description 75
- 230000008878 coupling Effects 0.000 title claims description 12
- 238000010168 coupling process Methods 0.000 title claims description 12
- 238000005859 coupling reaction Methods 0.000 title claims description 12
- 239000000306 component Substances 0.000 claims abstract description 79
- 238000009833 condensation Methods 0.000 claims abstract description 56
- 230000005494 condensation Effects 0.000 claims abstract description 56
- 238000005057 refrigeration Methods 0.000 claims abstract description 51
- 239000012533 medium component Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 40
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 10
- 239000003507 refrigerant Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 239000011555 saturated liquid Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
-
- 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
- F25B41/40—Fluid line arrangements
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- 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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0295—Start-up or control of the process; Details of the apparatus used, e.g. sieve plates, packings
-
- 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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J5/00—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants
-
- 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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/14—External refrigeration with work-producing gas expansion loop
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a component separation type ORC coupled VCR system based on mixed working media, which comprises the mixed working media as system circulating working media. The system comprises a steam generator, an expander, a component separation and condensation unit, a working medium pump, a throttle valve, a refrigeration evaporator and a compressor. Compared with the traditional ORC-VCR system, the new circulation can regulate and control the working medium components of the ORC part and the VCR part through the component separation and condensation unit, and the energy efficiency ratio and the sum of the new system
The efficiency is higher than a conventional integrated ORC-VCR system.
Description
Technical Field
The invention belongs to the field of new energy and energy conservation, and particularly relates to a component separation type ORC (organic Rankine cycle) coupled VCR (vapor compression refrigeration cycle) system based on a mixed working medium.
Background
Energy is the basis on which humans depend for survival and society for development. With the rapid development of economy, the demand of energy has been sharply increased, with the accompanying sharp shortage of fossil energy and the resultant environmental deterioration. In order to save energy and protect ecological environment, china formally puts forward a promise of carbon dioxide emission, namely striving to achieve carbon peak reaching 2030 years ago and achieve carbon neutralization 2060 years ago.
In the development and utilization of renewable energy sources, medium-low temperature heat energy (the temperature is lower than 300 ℃) has various types, such as industrial waste heat, and the total amount of renewable energy sources (geothermal energy, solar energy, biomass energy and the like) is huge. One of the main utilization modes of medium-low temperature heat energy is thermal power conversion, thermodynamic Cycle is an important way for realizing thermal power conversion, and is also an important theoretical basis for high-efficiency utilization of medium-low temperature heat energy, and in recent years, medium-low temperature thermal power conversion technologies represented by Organic Rankine Cycle (ORC) have attracted wide attention. In the industrial field, especially in the aspect of waste heat utilization, power generation by an organic rankine cycle alone is difficult due to the high rotational speed of an expander (turbine type), the difficulty of power generation integration, and the like, and thus, researchers have proposed a coupled cycle based on the organic rankine cycle, such as a vapor compression refrigeration cycle.
An Organic Rankine Cycle (ORC) coupled vapor compression refrigeration cycle (VCR) system (hereinafter referred to as an ORC-VCR system) can be divided into a pure working medium system and a mixed working medium system according to a used circulating working medium, and research results of scholars show that the total refrigeration coefficient of the mixed working medium system represented by a non-azeotropic mixed working medium is higher than that of the pure working medium system. ORC-VCR systems can be divided into two categories according to the cycle architecture: both unitary and split. The integrated structure is compact, can be highly integrated, but has lower efficiency; the separated type efficiency is high, but the structure is complex, and the integration level is poor.
Disclosure of Invention
The invention aims to provide a component separation type ORC coupling VCR system based on a mixed working medium, and aims to solve the problem that the integration level and the efficiency of the system of the traditional ORC coupling VCR system are difficult to be considered at the same time.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
a component separation type ORC coupling VCR system based on mixed working media comprises an organic Rankine cycle system, a steam compression refrigeration cycle system and a component separation and condensation unit;
the organic Rankine cycle system comprises a steam generator, an expander, a component separation and condensation unit and a working medium pump;
the vapor compression refrigeration circulating system comprises a component separation and condensation unit, a throttling valve, a refrigeration evaporator and a compressor;
the steam generator and the refrigeration evaporator are both heat exchange units;
the steam generator comprises a steam generator working medium input end, a steam generator working medium output end, a steam generator heat source input end and a steam generator heat source output end;
the refrigeration evaporator comprises a refrigeration evaporator working medium input end, a refrigeration evaporator working medium output end, a refrigeration evaporator refrigerant input end and a refrigeration evaporator refrigerant output end;
the component separation and condensation unit comprises a component separation and condensation unit working medium input end, a component separation and condensation unit working medium first output end and a component separation and condensation unit working medium second output end;
the expander comprises an expander working medium input end and an expander working medium output end;
the working medium pump comprises a working medium input end of the working medium pump and a working medium output end of the working medium pump;
the throttle valve comprises a throttle valve working medium input end and a throttle valve working medium output end;
the compressor comprises a compressor working medium input end and a compressor working medium output end;
the first output end of the working medium of the component separation and condensation unit is communicated with the working medium input end of the working medium pump through a pipeline; the second output end of the working medium of the component separation and condensation unit is communicated with the working medium input end of the throttle valve through a pipeline; the working medium output end of the working medium pump is communicated with the working medium input end of the steam generator through a pipeline;
the working medium output end of the steam generator is communicated with the working medium input end of the expansion machine through a pipeline;
the throttle valve working medium output end is communicated with the refrigeration evaporator working medium input end through a pipeline;
the working medium output end of the refrigeration evaporator is communicated with the working medium input end of the compressor through a pipeline;
the working medium output end of the expansion machine and the working medium output end of the compressor are communicated with the working medium input end of the component separation and condensation unit through a pipeline;
the mixed working medium used by the component separation type ORC coupling VCR system is used as a circulating working medium, and working medium components entering the organic Rankine cycle system and the steam compression refrigeration cycle system are regulated through the component separation and condensation unit.
Furthermore, the circulating working medium takes R134a and R245fa as two components and is a mixed working medium.
Furthermore, the component separation and condensation unit adopts a liquid separation and condensation component separation mode and comprises a high-temperature condenser, a gas-liquid separator and a low-temperature condenser;
the high-temperature condenser comprises a high-temperature condenser heat source input end, a high-temperature condenser heat source output end, a high-temperature condenser working medium input end and a high-temperature condenser working medium output end;
the gas-liquid separator comprises a gas-liquid separator working medium input end, a gas-liquid separator gaseous working medium output end and a gas-liquid separator liquid working medium output end;
the low-temperature condenser comprises a low-temperature condenser heat source input end, a low-temperature condenser heat source output end, a low-temperature condenser working medium input end and a low-temperature condenser working medium output end;
the working medium output end of the high-temperature condenser is connected with the working medium input end of the gas-liquid separator through a pipeline;
the gas-liquid separator gaseous working medium output end is communicated with the low-temperature condenser working medium input end through a pipeline; the liquid working medium output end of the gas-liquid separator is communicated with the working medium input end of the working medium pump through a pipeline;
the working medium output end of the low-temperature condenser is communicated with the working medium input end of the throttle valve through a pipeline;
and the working medium output end of the expansion machine and the working medium output end of the compressor are communicated with the working medium input end of the high-temperature condenser through a pipeline.
Furthermore, the component separation and condensation unit adopts a rectification component separation mode and comprises a rectification tower.
The component separation type ORC coupling VCR system based on the mixed working medium has the following advantages: the mixed working medium is adopted as the system circulating working medium, the working medium components entering the organic Rankine cycle system and the steam compression refrigeration cycle system are regulated through the component separation and condensation unit, the working medium components can be regulated, and compared with the traditional ORC-VCR system, the new system has the advantages of energy efficiency ratio (COP) and COP
The efficiency is higher than that of the traditional ORC-VCR system.
Drawings
FIG. 1 is a schematic diagram of a mixed working fluid based component split ORC coupled VCR system of the present invention;
FIG. 2 (a) is a schematic diagram of a first embodiment of a component separation and condensation unit according to the present invention employing liquid separation condensation;
FIG. 2 (b) is a schematic view of a component separation and condensation unit according to a second embodiment of the present invention employing a rectification column;
FIG. 3 is a graph comparing the energy efficiency ratio of a mixed working fluid based component split ORC coupled VCR system of the present invention and a conventional ORC coupled VCR system;
FIG. 4 shows a component-separated ORC coupled VCR system based on mixed working fluid and a conventional ORC coupled VCR system
An efficiency comparison graph;
the notation in the figure is: 1. a steam generator; 11. a working medium input end of the steam generator; 12. a working medium output end of the steam generator; 13. a steam generator heat source input end; 14. a steam generator heat source output end; 2. an expander; 21. an expander working medium input end; 22. an expander working medium output end; 3. a component separation and condensation unit; 31. a component separation and condensation unit working medium input end; 32. a first output end of the working medium of the component separation and condensation unit; 33. a second output end of the component separation and condensation unit working medium; 301. a high temperature condenser; 302. a gas-liquid separator; 303. a low temperature condenser; 304. a rectifying tower; 4. a working medium pump; 41. a working medium input end of the working medium pump; 42. a working medium output end of the working medium pump; 5. a throttle valve; 51. a throttle valve working medium input end; 52. a throttle valve working medium output end; 6. a refrigeration evaporator; 61. a working medium input end of the refrigeration evaporator; 62. a working medium output end of the refrigeration evaporator; 63. a refrigerant input end of the refrigeration evaporator; 64. a refrigerant output end of the refrigeration evaporator; 7. a compressor; 71. a compressor working medium input end; 72. and a working medium output end of the compressor.
Detailed Description
For better understanding of the objects, structure and function of the present invention, a component-split ORC-coupled VCR system based on mixed working fluids according to the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention includes an organic rankine cycle system, a vapor compression refrigeration cycle system, and a component separation and condensation unit 3.
The organic Rankine cycle system comprises a steam generator 1, an expansion machine 2, a component separation and condensation unit 3 and a working medium pump 4.
The vapor compression refrigeration cycle system comprises a component separation and condensation unit 3, a throttle valve 5, a refrigeration evaporator 6 and a compressor 7.
The steam generator 1 and the refrigeration evaporator 6 are both heat exchange units;
the steam generator 1 comprises a steam generator working medium input end 11, a steam generator working medium output end 12, a steam generator heat source input end 13 and a steam generator heat source output end 14;
the refrigeration evaporator 6 comprises a refrigeration evaporator working medium input end 61, a refrigeration evaporator working medium output end 62, a refrigeration evaporator refrigerant input end 63 and a refrigeration evaporator refrigerant output end 64;
the component separation and condensation unit 3 comprises a component separation and condensation unit working medium input end 31, a component separation and condensation unit working medium first output end 32 and a component separation and condensation unit working medium second output end 33;
the expander 2 comprises an expander working medium input end 21 and an expander working medium output end 22;
the working medium pump 4 comprises a working medium input end 41 of the working medium pump and a working medium output end 42 of the working medium pump;
the throttle valve 5 comprises a throttle valve working medium input end 51 and a throttle valve working medium output end 52;
the compressor 7 comprises a compressor working medium input end 71 and a compressor working medium output end 72;
the first output end 32 of the working medium of the component separation and condensation unit is communicated with the working medium input end 41 of the working medium pump through a pipeline; the second output end 33 of the working medium of the component separation and condensation unit is communicated with the working medium input end 51 of the throttle valve through a pipeline; the working medium output end 42 of the working medium pump is communicated with the working medium input end 11 of the steam generator through a pipeline;
the working medium output end 12 of the steam generator is communicated with the working medium input end 21 of the expander through a pipeline;
the throttle valve working medium output end 52 is communicated with a refrigerating evaporator working medium input end 61 through a pipeline;
the working medium output end 62 of the refrigeration evaporator is communicated with the working medium input end 71 of the compressor through a pipeline;
the working medium output end 22 of the expansion machine and the working medium output end 72 of the compressor are communicated with the working medium input end 31 of the component separation and condensation unit through pipelines;
the mixed working medium used by the component separation type ORC coupling VCR system is used as a circulating working medium, and working medium components entering the organic Rankine cycle system and the steam compression refrigeration cycle system are regulated through the component separation and condensation unit 3.
First embodiment of the component separation and condensation unit 3:
as shown in fig. 2 (a), the component separation and condensation unit 3 adopts a liquid separation and condensation component separation method, and includes a high-temperature condenser 301, a gas-liquid separator 302, and a low-temperature condenser 303;
wherein the high-temperature condenser 301 and the low-temperature condenser 303 are both heat exchange units;
the high-temperature condenser 301 comprises a high-temperature condenser heat source input end, a high-temperature condenser heat source output end, a high-temperature condenser working medium input end and a high-temperature condenser working medium output end;
the gas-liquid separator 302 comprises a gas-liquid separator working medium input end, a gas-liquid separator gaseous working medium output end and a gas-liquid separator liquid working medium output end;
the low-temperature condenser 303 comprises a low-temperature condenser heat source input end, a low-temperature condenser heat source output end, a low-temperature condenser working medium input end and a low-temperature condenser working medium output end;
the working medium output end of the high-temperature condenser is connected with the working medium input end of the gas-liquid separator through a pipeline;
the gas-liquid separator gaseous working medium output end is communicated with the low-temperature condenser working medium input end through a pipeline; the liquid working medium output end of the gas-liquid separator is communicated with a working medium input end 41 of a working medium pump through a pipeline;
the working medium output end of the low-temperature condenser is communicated with the working medium input end 51 of the throttle valve through a pipeline;
the expander working medium output end 22 and the compressor working medium output end 72 are communicated with the high-temperature condenser working medium input end through pipelines.
Second embodiment of the component separation and condensation unit 3:
as shown in fig. 2 (a), the component separating and condensing unit 3 employs a rectification component separating method, and includes a rectification column 304.
In the component separation and condensation unit 3, a working medium is condensed 301 into a set dryness through a high-temperature condenser and enters a gas-liquid separator 302, gas and liquid in the gas-liquid separator 302 are separated into two streams of fluids with different components, a saturated liquid enters an organic Rankine cycle system, a saturated vapor enters a low-temperature condenser 303 and is condensed into a saturated liquid state, and the saturated liquid enters a vapor compression refrigeration cycle system;
the working medium entering the organic Rankine cycle system is pressurized by a working medium pump 4, enters a steam generator 1 and is heated into steam, and enters an expansion machine 2 to expand and do work; the working medium entering the steam compression refrigeration cycle system enters the refrigeration evaporator 6 for evaporation refrigeration after passing through the throttle valve 5, then enters the compressor 7 for compression and pressure rise, and finally the fluid flowing through the expander 2 and the compressor 7 is mixed and enters the high-temperature condenser 301 to complete the cycle.
The component separation and condensation unit in the system adopts a liquid separation and condensation mode, the circulating working medium is a mixed working medium taking R134a and R245fa as two components, and a mathematical modeling software MATLAB is utilized to carry out modeling optimization on the component separation type ORC coupled VCR system based on the mixed working medium.
The standard working condition of the system is set as follows: the vapor generation temperature was 85 ℃, the condensation temperature was 35 ℃, the refrigeration evaporation temperature was 0 ℃, the liquid separation dryness was 0.25, and the ambient temperature was 20 ℃, and the results are shown in fig. 3 and 4.
Energy efficiency ratio (COP) and COP of component separation type ORC coupling VCR system based on mixed working medium
The efficiency is much higher than a conventional ORC coupled VCR system. In the present embodiment, when the R134a composition ratio is increased from 0.1 to 0.5, the system COP is increased from 0.674 to 0.71, and when the R134a composition ratio is increased from 0.5 to 0.9, the system COP is decreased from 0.71 to 0.630; when the component ratio of R134a is increased from 0.1 to 0.5,
the efficiency is increased from 25.984 to 35.208, the R134a component ratio is increased from 0.5 to 0.9,
the efficiency decreases from 35.208 to 25.056.
The invention uses the mixed working medium as the circulating working medium, obtains the optimal working medium component through research, and compared with the traditional ORC coupling VCR system, the COP and COP of the new system
The efficiency is higher than that of the traditional ORC coupled VCR system.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (4)
1. A component separation type ORC coupling VCR system based on mixed working media is characterized by comprising an organic Rankine cycle system, a vapor compression refrigeration cycle system and a component separation and condensation unit (3);
the organic Rankine cycle system comprises a steam generator (1), an expander (2), a component separation and condensation unit (3) and a working medium pump (4);
the vapor compression refrigeration cycle system comprises a component separation and condensation unit (3), a throttle valve (5), a refrigeration evaporator (6) and a compressor (7);
the steam generator (1) and the refrigeration evaporator (6) are both heat exchange units;
the steam generator (1) comprises a steam generator working medium input end (11), a steam generator working medium output end (12), a steam generator heat source input end (13) and a steam generator heat source output end (14);
the refrigeration evaporator (6) comprises a refrigeration evaporator working medium input end (61), a refrigeration evaporator working medium output end (62), a refrigeration evaporator refrigerant input end (63) and a refrigeration evaporator refrigerant output end (64);
the component separation and condensation unit (3) comprises a component separation and condensation unit working medium input end (31), a component separation and condensation unit working medium first output end (32) and a component separation and condensation unit working medium second output end (33);
the expander (2) comprises an expander working medium input end (21) and an expander working medium output end (22);
the working medium pump (4) comprises a working medium input end (41) of the working medium pump and a working medium output end (42) of the working medium pump;
the throttle valve (5) comprises a throttle valve working medium input end (51) and a throttle valve working medium output end (52);
the compressor (7) comprises a compressor working medium input end (71) and a compressor working medium output end (72);
the first output end (32) of the working medium of the component separation and condensation unit is communicated with the working medium input end (41) of the working medium pump through a pipeline; the second output end (33) of the working medium of the component separation and condensation unit is communicated with the working medium input end (51) of the throttle valve through a pipeline; the working medium output end (42) of the working medium pump is communicated with the working medium input end (11) of the steam generator through a pipeline;
the working medium output end (12) of the steam generator is communicated with the working medium input end (21) of the expansion machine through a pipeline;
the throttle valve working medium output end (52) is communicated with a refrigerating evaporator working medium input end (61) through a pipeline;
the working medium output end (62) of the refrigeration evaporator is communicated with the working medium input end (71) of the compressor through a pipeline;
the expander working medium output end (22) and the compressor working medium output end (72) are communicated with the component separation and condensation unit working medium input end (31) through a pipeline;
the mixed working medium used by the component separation type ORC coupling VCR system is used as a circulating working medium, and the working medium components entering the organic Rankine cycle system and the steam compression refrigeration cycle system are adjusted through the component separation and condensation unit (3), so that the working medium components entering the organic Rankine cycle system and the steam compression refrigeration cycle system are optimal working medium components.
2. The mixed working fluid based component separated ORC coupled VCR system according to claim 1, wherein the circulating working fluid is a mixed working fluid.
3. The mixed working medium-based component separation type ORC coupled VCR system according to claim 1, wherein the component separation and condensation unit (3) adopts a liquid separation and condensation component separation mode and comprises a high temperature condenser (301), a gas-liquid separator (302) and a low temperature condenser (303);
the high-temperature condenser (301) comprises a high-temperature condenser heat source input end, a high-temperature condenser heat source output end, a high-temperature condenser working medium input end and a high-temperature condenser working medium output end;
the gas-liquid separator (302) comprises a gas-liquid separator working medium input end, a gas-liquid separator gaseous working medium output end and a gas-liquid separator liquid working medium output end;
the low-temperature condenser (303) comprises a low-temperature condenser heat source input end, a low-temperature condenser heat source output end, a low-temperature condenser working medium input end and a low-temperature condenser working medium output end;
the working medium output end of the high-temperature condenser is connected with the working medium input end of the gas-liquid separator through a pipeline;
the gas-liquid separator gaseous working medium output end is communicated with the low-temperature condenser working medium input end through a pipeline; the liquid working medium output end of the gas-liquid separator is communicated with a working medium input end (41) of a working medium pump through a pipeline;
the working medium output end of the low-temperature condenser is communicated with a working medium input end (51) of a throttle valve through a pipeline;
and the expander working medium output end (22) and the compressor working medium output end (72) are communicated with the high-temperature condenser working medium input end through pipelines.
4. The mixed working fluid based component-separated ORC coupled VCR system according to claim 1, wherein the component separating and condensing unit (3) employs a rectification component separation method including a rectification column (304).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210059635.3A CN114396732B (en) | 2022-01-19 | 2022-01-19 | Component separation type ORC coupling VCR system based on mixed working medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210059635.3A CN114396732B (en) | 2022-01-19 | 2022-01-19 | Component separation type ORC coupling VCR system based on mixed working medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114396732A CN114396732A (en) | 2022-04-26 |
| CN114396732B true CN114396732B (en) | 2023-02-28 |
Family
ID=81231851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210059635.3A Active CN114396732B (en) | 2022-01-19 | 2022-01-19 | Component separation type ORC coupling VCR system based on mixed working medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114396732B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004012110A (en) * | 2002-06-12 | 2004-01-15 | Tokyo Gas Co Ltd | Air conditioner |
| CN103195526A (en) * | 2013-04-22 | 2013-07-10 | 重庆大学 | Combined cooling power generation composite system based on supercritical organic Rankine cycle |
| CN103940134A (en) * | 2014-04-03 | 2014-07-23 | 天津大学 | Vapor compression refrigeration cycle expansion work recovery system |
| CN105089726A (en) * | 2015-01-08 | 2015-11-25 | 湘潭大学 | Cooling, heating and power combined supply system based on double-pressure organic Rankine cycle |
| CN112856847A (en) * | 2021-03-08 | 2021-05-28 | 中国科学技术大学 | Adjustable CO2Mixed working medium combined cooling and power generation system |
| CN113357845A (en) * | 2021-06-08 | 2021-09-07 | 南京工业大学 | Liquid separation condensation compression-injection refrigeration cycle system |
| CN113357846A (en) * | 2021-06-08 | 2021-09-07 | 南京工业大学 | Liquid separation condensation injection-compression refrigeration cycle system |
-
2022
- 2022-01-19 CN CN202210059635.3A patent/CN114396732B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004012110A (en) * | 2002-06-12 | 2004-01-15 | Tokyo Gas Co Ltd | Air conditioner |
| CN103195526A (en) * | 2013-04-22 | 2013-07-10 | 重庆大学 | Combined cooling power generation composite system based on supercritical organic Rankine cycle |
| CN103940134A (en) * | 2014-04-03 | 2014-07-23 | 天津大学 | Vapor compression refrigeration cycle expansion work recovery system |
| CN105089726A (en) * | 2015-01-08 | 2015-11-25 | 湘潭大学 | Cooling, heating and power combined supply system based on double-pressure organic Rankine cycle |
| CN112856847A (en) * | 2021-03-08 | 2021-05-28 | 中国科学技术大学 | Adjustable CO2Mixed working medium combined cooling and power generation system |
| CN113357845A (en) * | 2021-06-08 | 2021-09-07 | 南京工业大学 | Liquid separation condensation compression-injection refrigeration cycle system |
| CN113357846A (en) * | 2021-06-08 | 2021-09-07 | 南京工业大学 | Liquid separation condensation injection-compression refrigeration cycle system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114396732A (en) | 2022-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8572973B2 (en) | Apparatus and method for generating power and refrigeration from low-grade heat | |
| CN110887278B (en) | Energy self-sufficient carbon dioxide combined cooling heating and power system for low-grade heat source | |
| CN103061835B (en) | Overlapped organic rankine cycle efficient heat machine | |
| CN109083705B (en) | Variable-component multi-pressure evaporation non-azeotropic working medium Rankine cycle system with ejector | |
| CN105089726A (en) | Cooling, heating and power combined supply system based on double-pressure organic Rankine cycle | |
| CN102563987A (en) | Vapor-compression refrigerating plant driven by organic Rankine cycle and method | |
| CN107939548B (en) | Novel internal combustion engine waste heat utilization combined cooling heating and power system and working method thereof | |
| CN111735237B (en) | Well low temperature heat utilization merit cold joint system | |
| Zhang et al. | Optimization potentials for the waste heat recovery of a gas-steam combined cycle power plant based on absorption heat pump | |
| Chen et al. | Performance Analysis and Evaluation of a Supercritical CO 2 Rankine Cycle Coupled with an Absorption Refrigeration Cycle | |
| Hasan et al. | Direct and indirect utilization of thermal energy for cooling generation: A comparative analysis | |
| CN112431644B (en) | Cooling and heating combined supply system by adjusting flow distribution ratio of working medium | |
| CN107421157B (en) | Ammonia absorption type power and injection type refrigeration composite circulation system and method | |
| CN202501677U (en) | Steam compression refrigeration device driven by organic Rankine cycle | |
| CN209875221U (en) | System for improving power generation capacity of medium-low temperature heat source by adopting injection pump and separator | |
| CN209910217U (en) | Organic Rankine cycle system for multi-grade waste heat utilization | |
| CN114396732B (en) | Component separation type ORC coupling VCR system based on mixed working medium | |
| CN110685764A (en) | Non-azeotropic working medium two-stage organic flash evaporation circulation system and heat energy recovery method thereof | |
| CN116558145A (en) | Refrigerating system adopting double ejectors | |
| CN112880230B (en) | Power generation and refrigeration combined system | |
| CN116006283A (en) | Low-grade heat energy comprehensive utilization system | |
| Afif et al. | Thermodynamic investigation of a solar energy cogeneration plant using an organic Rankine cycle in supercritical conditions | |
| CN115540379A (en) | Positive and negative coupling circulation combined cooling and power generation system | |
| CN112412560A (en) | Kalina circulation system based on single screw expander | |
| CN113357845A (en) | Liquid separation condensation compression-injection refrigeration cycle system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |