CN115540379A - Positive and negative coupling circulation combined cooling and power generation system - Google Patents
Positive and negative coupling circulation combined cooling and power generation system Download PDFInfo
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- CN115540379A CN115540379A CN202211144549.9A CN202211144549A CN115540379A CN 115540379 A CN115540379 A CN 115540379A CN 202211144549 A CN202211144549 A CN 202211144549A CN 115540379 A CN115540379 A CN 115540379A
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- expander
- working medium
- compressor
- clutch
- ejector
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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
- F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
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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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
- F01K9/003—Plants characterised by condensers arranged or modified to co-operate with the engines condenser cooling circuits
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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
- F25B9/06—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The invention discloses a positive and negative coupling circulation combined cooling and power generation system, which comprises: the organic Rankine cycle subsystem and the jet type expansion refrigeration subsystem realize organic coupling of two sub-cycles by sharing a condenser, and the expander is respectively connected with the generator and the compressor by using the clutch, so that flexible cold and electricity output adjustment can be realized under variable cooling load. The clutch connected with the expander drives the compressor to drive refrigeration. The system of the invention adds the ejector and the gas-liquid separator on the basis of the organic Rankine cycle and the steam compression type refrigeration cycle, reduces the throttling loss and the compression ratio by fully utilizing the high-pressure characteristic of the organic working medium flowing through the outlet of the condenser, and greatly improves the refrigeration capacity and the refrigeration ratio of the system
Efficiency. The invention can be widely applied to the technical field of medium-low grade heat source cogeneration.
Description
Technical Field
The invention relates to the technical field of medium-low grade heat source combined cooling and power generation, in particular to a forward and reverse coupling circulation combined cooling and power generation system.
Background
The comprehensive utilization rate of energy is improved, an advanced energy conversion system is developed, a clean low-carbon energy system is constructed, the primary energy consumption is as high as 46.4 hundred million tons of standard coal in 2018, the total quantity of waste heat resources is 7.89 to 31.09 million tons of standard coal, the waste heat resources account for 17 to 67 percent of the total energy consumption, and the potential of waste heat recovery and utilization is huge. Therefore, the rapid development of the efficient waste heat recycling technology has important practical significance.
Organic rankine cycles, one of the main methods for utilizing renewable energy, can be driven by various low-temperature heat sources such as solar energy, geothermal water, industrial waste heat, and biomass energy as low-grade heat sources. Meanwhile, for thermally driven refrigeration, an organic rankine cycle driven vapor compression refrigeration cycle is also one of the most commonly used waste heat driven refrigeration methods. The circulating expander directly transmits the kinetic energy to the compressor, so that the loss of converting electric energy into kinetic energy is reduced. However, when the circulation is in low-temperature refrigeration, a large amount of throttle valve is generated
And (4) loss.
Disclosure of Invention
To solve at least one of the technical problems in the prior art to a certain extent, the invention aims to provide a forward and backward coupling cycle combined cooling and power generation system.
The technical scheme adopted by the invention is as follows:
a forward-reverse coupled cycle combined cooling and power generation system, comprising:
the organic Rankine cycle subsystem comprises a high-pressure evaporator, an expander, a condenser, a working medium pump, an ejector, a first clutch and a generator; the outlet of the high-pressure evaporator is connected with the inlet of the expander, the expander is connected with the generator through the first clutch, the outlet of the expander is connected with the inlet of the condenser, the outlet of the condenser is divided and respectively connected with the inlet of the working medium pump and the primary inflow port of the ejector, and the outlet of the working medium pump is connected with the inlet of the high-pressure evaporator to complete power sub-cycle;
the injection type expansion refrigeration subsystem comprises a gas-liquid separator, a compressor, a throttle valve, a second clutch and a low-pressure evaporator; the outlet of the ejector is connected with the inlet of the gas-liquid separator, the gas-liquid separator is provided with two outlets which are respectively connected with the inlet of the compressor and the inlet of the throttle valve, the compressor is connected with the expander through the second clutch, the outlet of the compressor is connected with the inlet of the condenser, the throttle valve is connected with the inlet of the low-pressure evaporator, and the outlet of the low-pressure evaporator is connected with the secondary inflow port of the ejector, so that the jet type expansion refrigeration sub-cycle is completed.
Further, the high-pressure evaporator in the organic Rankine cycle subsystem absorbs low-grade heat, organic working medium in the high-pressure evaporator evaporates and enters the expansion machine, the organic working medium output by the expansion machine and the organic working medium output by the compressor are mixed and flow through the condenser and are condensed into liquid working medium, a part of the liquid working medium is boosted by the working medium pump and then returns to the high-pressure evaporator, and power sub-cycle is completed.
Furthermore, after the organic working medium in the injection type expansion refrigeration subsystem is cooled by the condenser, the organic working medium is decompressed into primary fluid by the ejector to drive secondary fluid to be ejected, and the organic working medium output from the ejector enters the gas-liquid separator; the gas-liquid separator divides the organic working medium into two parts, and one part of the gaseous organic working medium is pressurized by the compressor, mixed with the organic working medium output by the expander and then returned to the condenser; the other part of the liquid organic working medium is cooled and depressurized through the throttle valve; the organic working medium output from the throttle valve enters the low-pressure evaporator to be evaporated, the organic working medium evaporated into gas enters the ejector, the organic working medium is decompressed into secondary fluid, the secondary fluid and the primary fluid are mixed and then ejected, and the expansion refrigeration cycle of the ejector is completed.
Further, the expander in the organic Rankine cycle subsystem and the compressor in the injection type expansion refrigeration subsystem are coaxially connected through a second clutch.
Further, the orc subsystem, in a power generation mode, closes the first clutch between the expander and the generator and opens the second clutch between the expander and the compressor; the kinetic energy generated by the expander is used entirely for power generation.
Further, the orc subsystem, in the cooling-electric mode, closes the first clutch between the expander and the generator and closes the second clutch between the expander and the compressor; in this case, a part of the kinetic energy generated by the expander is used for generating electricity, and a part of the kinetic energy drives the compressor to refrigerate.
Further, the orc subsystem, in a cooling mode, disconnects the first clutch between the expander and the generator and closes the second clutch between the expander and the compressor; the kinetic energy generated by the expander is used to drive the compressor for cooling.
Further, the positive and negative coupling cycle combined cooling and power generation system is driven by a medium and low temperature heat source, and the medium and low temperature heat source is industrial waste heat, solar energy or geothermal energy.
The beneficial effects of the invention are: the system of the invention adds the ejector and the gas-liquid separator on the basis of the organic Rankine cycle and the steam compression type refrigeration cycle, reduces the throttling loss and the compression ratio by fully utilizing the high-pressure characteristic of the organic working medium flowing through the outlet of the condenser, and greatly improves the refrigeration capacity and the refrigeration ratio of the system
Efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present invention or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a forward-reverse coupled cycle cogeneration system in an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the essential numbers, and greater than, less than, etc. are understood as including the essential numbers. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
As shown in fig. 1, the present embodiment provides a combined cycle cogeneration system with an ejector, which improves the cogeneration effect of a medium-low temperature heat source by organically combining a rankine cycle and an ejector expansion refrigeration cycle, and integrates the system
The efficiency and the cooling capacity are improved. The system specifically comprises: high-pressure evaporator 1, expander 2, second clutch 3, condenser 4, working medium pump 5, sprayer 6, vapour and liquid separator 7, compressor 8, choke valve 9, low-pressure evaporator 10, first clutch 11, generator 12, wherein:
the outlet of the high-pressure evaporator 1 is connected with the inlet of the expander 2, the expander 2 is connected with the generator 12 through the first clutch 11, the outlet of the expander 2 is connected with the condenser 4, the outlet of the condenser 4 is divided and respectively connected with the inlet of the working medium pump 5 and the primary inflow port of the ejector 6, and the outlet of the working medium pump 5 is connected with the high-pressure evaporator 1 to complete the power sub-cycle;
the outlet of the ejector 6 is connected with a gas-liquid separator 7, the gas-liquid separator 7 has two outlets which are respectively connected with the inlets of a compressor 8 and a throttle valve 9, the compressor 8 is connected with the expander 2 through a second clutch 3, the outlet of the compressor 8 is connected with the inlet of the condenser 4, the throttle valve 9 is connected with the inlet of a low-pressure evaporator 10, the low-pressure evaporator 10 is connected with a secondary inflow port of the ejector 6, and the ejector expansion refrigeration sub-cycle is completed.
Further as an optional implementation mode, the high-pressure evaporator 1 in the organic rankine cycle subsystem absorbs low-grade heat, the organic working medium in the high-pressure evaporator 1 evaporates and enters the expander 2, the organic working medium from the expander 2 and the organic working medium from the compressor 8 are mixed and flow through the condenser 4 to be condensed into liquid organic working medium, a part of the liquid organic working medium is boosted through the working medium pump 5 and then returns to the high-pressure evaporator 1, and power sub-cycle is completed.
As a further optional implementation manner, after the organic working medium in the jet type expansion refrigeration cycle subsystem is cooled by the condenser 4, the organic working medium is subjected to pressure reduction by the ejector 6 to become a primary fluid to drive a secondary fluid to be ejected, the organic working medium coming out of the ejector 6 enters the gas-liquid separator 7, the gas-liquid separator 7 divides the organic working medium into two parts, and one part of the gaseous organic working medium is pressurized by the compressor 8 and mixed with the organic working medium coming out of the expander 2 and then returns to the condenser 4; the other part of the liquid organic working medium is cooled and depressurized through a throttle valve 9. The organic working medium from the throttle valve 9 enters a low-pressure evaporator 10 to be evaporated, the organic working medium evaporated into gas enters an ejector 6 to be decompressed into secondary fluid to be mixed with primary fluid and then ejected, and the jet type expansion refrigeration cycle is completed.
Further as an alternative embodiment, the expander 2 in the organic rankine cycle subsystem and the compressor 8 in the ejector expansion refrigeration subsystem are coaxially connected through a second clutch 3.
Further as an alternative embodiment, the orc subsystem may close the first clutch 11 between the expander 2 and the generator 12 and open the second clutch 3 between the expander 2 and the compressor 8 in the power generation mode. The kinetic energy generated by the expander is now used entirely for power generation.
In the cooling mode, the first clutch 11 between the expander 2 and the generator 12 may be closed, and the second clutch 3 between the expander 2 and the compressor 8 may be closed. In this case, a part of the kinetic energy generated by the expander is used for generating electricity, and a part of the kinetic energy drives the compressor to refrigerate.
In the cooling mode, the first clutch 11 between the expander 2 and the generator 12 may be opened, and the second clutch 3 between the expander 2 and the compressor 8 may be closed. The kinetic energy generated by the expander is used to drive the compressor for refrigeration.
Further as an optional implementation mode, the positive and reverse coupling cycle combined cooling and power generation system is driven by a medium and low temperature heat source, and the medium and low temperature heat source is industrial waste heat, solar energy or geothermal energy.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to specific embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of an embodiment of a forward-reverse coupled cycle cogeneration system with an ejector according to the present invention. Where S1 to S13 denote working media, S14 and S15 denote heat source media, S16 and S17 denote cooling water, and S18 and S19 denote air. The system comprises a power sub-cycle and a jet type expansion refrigeration sub-cycle, wherein the system adopts a medium-low temperature heat source to drive the power sub-cycle to work, and the work done by the power sub-cycle drives the jet type expansion refrigeration sub-cycle to refrigerate.
Referring to fig. 1, the power sub-cycle comprises a high-pressure evaporator 1, an expander 2, a condenser 4 and a working medium pump 5 which are sequentially connected into a loop, wherein an organic working medium S1 from the high-pressure evaporator 1 is expanded by the expander 2 to form S2, and is mixed with an organic working medium S10 flowing out of a compressor 8 to form S3, the S3 enters the condenser 4, a part of the condensed organic working medium S4 is divided into S5, and is pressurized by the working medium pump 5, and a pressurized organic working medium S6 returns to the high-pressure evaporator, so that the power sub-cycle is completed.
Wherein, the high-pressure evaporator 1 is a fluid heat exchange device for absorbing heat of a heat source S14; the expansion machine 2 is a gas expansion working device and performs work by utilizing high-temperature high-pressure steam expansion; the condenser 4 is a condensing device for condensing the circulating steam, and the heat released by condensation is discharged to the environment through cooling water S16; the working medium pump 5 is a liquid pressurizing device for increasing the liquid pressure.
Referring to fig. 1, the jet type expansion refrigeration sub-cycle comprises a condenser 4, an ejector 6, a gas-liquid separator 7, a compressor 8, a throttle valve 9 and a low-pressure evaporator 10, wherein an organic working medium S8 is separated into a gaseous working medium S9 and a liquid working medium S11 through the gas-liquid separator, the organic working medium S9 is pressurized by the compressor 8 to form S10, the S10 is mixed with a working medium S2 at an outlet of the expander 2 to form S3, the S3 enters the condenser 4, and a part of the organic working medium S4 of the condenser 4 is divided into S7 and enters the ejector 6; the organic working medium S11 is expanded into a low-temperature working medium S12 through a throttle valve, the organic working medium S13 passing through the low-pressure evaporator 10 enters the ejector 6, and the organic working medium S7 and the organic working medium S13 are mixed in the ejector 6 and then ejected to complete the ejection type expansion refrigeration sub-cycle.
Wherein the condenser 4 is a condensing device for condensing the circulating steam; the ejector 6 is an energy conversion device and utilizes a high-pressure liquid working medium to eject a low-pressure gas working medium; the gas-liquid separator 7 is a separating device and is used for separating two-phase flow working media at the outlet of the ejector 6; the compressor 8 is a pressure increasing device for increasing the gas pressure; the throttle valve 9 is a throttling device and is used for realizing the depressurization of a high-pressure liquid working medium; the low-pressure evaporator 10 is a fluid heat exchange device in which refrigerant absorbs heat of air S18 to be evaporated to produce low-temperature air S19.
Referring to fig. 1, in the power generation mode, the first clutch 11 between the expander 2 and the generator 12 may be closed, and the second clutch 3 between the expander 2 and the compressor 8 may be opened. The kinetic energy generated by the expander is used for generating electricity; in the cooling mode, the first clutch 11 between the expander 2 and the generator 12 may be closed, and the second clutch 3 between the expander 2 and the compressor 8 may be closed. Part of the kinetic energy generated by the expander is used for generating electricity, and part of the kinetic energy drives the compressor to refrigerate; in the cooling mode, the first clutch 11 between the expander 2 and the generator 12 may be opened, and the second clutch 3 between the expander 2 and the compressor 8 may be closed. The kinetic energy generated by the expander is used to drive the compressor for refrigeration.
The positive and reverse coupling cycle combined cooling and power generation system with the ejector is driven by a medium and low temperature heat source, and the medium and low temperature heat source can be industrial waste heat, solar energy or geothermal energy. In the injection type expansion refrigeration system, the power sub-cycle and the injection type refrigeration sub-cycle share a working medium, and the working medium can be R290, but is not limited to R290, and can also be other working mediums.
In order to better embody the beneficial effects of the positive and negative coupled cycle combined cooling and power generation system with the ejector, working medium R290 is adopted, and the performance of the model is compared with that of a traditional organic Rankine cycle and compression type refrigeration system under the same thermal boundary condition. Simulation calculations were performed for both systems and table 1 compares the performance of both systems.
TABLE 1
From the performance comparison, the refrigerating capacity sum of the positive and negative coupled cycle combined cooling and power generation system with the ejector is shown under the same boundary condition
The efficiency is respectively 19.93kW and 16.92 percent, which is 16.07 percent and 15.89 percent higher than that of the traditional organic Rankine cycle and compression type refrigeration system.
The invention provides a positive and negative coupling circulation combined cooling and power generation system with an ejector, which has the fundamental reason for improving the performance that: 1. the expander is used as power to drive the compressor, and extra electric energy is not needed to drive the compressor, so that the conversion loss between mechanical energy and electric energy is reduced; 2. based on the traditional organic Rankine cycle and compression refrigeration cycle, the ejector and the gas-liquid separator are added, so that the ejector fully utilizes the higher pressure of the outlet of the condenser, and the throttle valve is greatly reduced
Loss, increase of system integrity
Efficiency and equipment refrigeration capacity under the same heat supply. 3. The pressure at the ejector outlet is higher than the low pressure evaporator pressure of conventional organic rankine and compression refrigeration cycles, which reduces the compression difficulty of the compressor.
In summary, compared with the prior art, the present embodiment has the following advantages and beneficial effects:
(1) According to the positive and reverse coupling cycle combined cooling and power generation system with the ejector, the compressor is driven by the expansion machine, extra electric energy is not needed for driving the compressor, and conversion loss between mechanical energy and electric energy is reduced.
(2) The positive and reverse coupling cycle combined cooling and power generation system with the ejector provided by the embodiment of the invention takes low-and-medium-grade heat as a heat source, and can be low-and-medium-temperature renewable energy sources such as industrial waste heat, solar energy, geothermal energy and the like, so as to achieve the purposes of energy conservation and emission reduction. Working media such as R290, R1234yf and the like can be adopted as circulating media, and the low GWP standard is met.
(3) The positive and negative coupling cycle combined cooling and power generation system with the ejector provided by the embodiment of the invention is based on the traditional organic Rankine cycle and compression refrigeration, and the ejector and the gas-liquid separator are added, so that the ejector fully utilizes the higher pressure at the outlet of the condenser, the expansion ratio of the throttle valve is reduced, and the integral system is improved
Efficiency.
(4) The positive and negative coupling cycle combined cooling and power generation system with the ejector breaks through a single energy supply mode, and can be flexibly adjusted according to the cooling load requirement.
In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A positive and negative coupling cycle combined cooling and power generation system, comprising:
the organic Rankine cycle subsystem comprises a high-pressure evaporator, an expander, a condenser, a working medium pump, an ejector, a first clutch and a generator; the outlet of the high-pressure evaporator is connected with the inlet of the expander, the expander is connected with the generator through the first clutch, the outlet of the expander is connected with the inlet of the condenser, the outlet of the condenser is divided and respectively connected with the inlet of the working medium pump and the primary inflow port of the ejector, and the outlet of the working medium pump is connected with the inlet of the high-pressure evaporator to complete power sub-cycle;
the injection type expansion refrigeration subsystem comprises a gas-liquid separator, a compressor, a throttle valve, a second clutch and a low-pressure evaporator; the outlet of the ejector is connected with the inlet of the gas-liquid separator, the gas-liquid separator is provided with two outlets which are respectively connected with the inlet of the compressor and the inlet of the throttle valve, the compressor is connected with the expander through the second clutch, the outlet of the compressor is connected with the inlet of the condenser, the throttle valve is connected with the inlet of the low-pressure evaporator, and the outlet of the low-pressure evaporator is connected with the secondary inflow port of the ejector, so that the jet type expansion refrigeration sub-cycle is completed.
2. The positive-reverse coupling cycle combined cooling and power generation system as claimed in claim 1, wherein the high-pressure evaporator in the organic rankine cycle subsystem absorbs low-grade heat, the organic working medium in the high-pressure evaporator evaporates and enters the expander, the organic working medium output by the expander and the organic working medium output by the compressor are mixed and flow through the condenser, and are condensed into liquid working medium, and a part of the liquid working medium is boosted by the working medium pump and then returns to the high-pressure evaporator, so as to complete the power sub-cycle.
3. The forward-backward coupling cycle combined cooling and power generation system as claimed in claim 1, wherein the organic working medium in the injection type expansion refrigeration subsystem is cooled by the condenser, and then is reduced in pressure by the ejector to become a primary fluid to drive a secondary fluid to be ejected, and the organic working medium output from the ejector enters the gas-liquid separator; the gas-liquid separator divides the organic working medium into two parts, and one part of the gaseous organic working medium is pressurized by the compressor, mixed with the organic working medium output by the expander and then returned to the condenser; the other part of the liquid organic working medium is cooled and depressurized through the throttle valve; the organic working medium output from the throttle valve enters the low-pressure evaporator to be evaporated, the organic working medium evaporated into gas enters the ejector, the organic working medium is decompressed into secondary fluid, the secondary fluid and the primary fluid are mixed and then ejected, and the expansion refrigeration cycle of the ejector is completed.
4. The cogeneration system of claim 1, wherein said expander of said orc subsystem is coaxially connected to said compressor of said ejector expansion refrigeration subsystem by a second clutch.
5. A positive and reverse coupled cycle combined cold and power generation system according to claim 1, wherein the orc subsystem, in a power generation mode, closes the first clutch between the expander and the generator and opens the second clutch between the expander and the compressor; the kinetic energy generated by the expander is used entirely for power generation.
6. The combined cooling and power generation system with a positive and reverse coupled cycle of claim 1, wherein the organic rankine cycle subsystem is configured to close the first clutch between the expander and the generator and close the second clutch between the expander and the compressor in the cooling and power mode; in this case, a part of the kinetic energy generated by the expander is used for generating electricity, and a part of the kinetic energy drives the compressor to refrigerate.
7. A cogeneration system according to claim 1, wherein said orc subsystem, in a cooling mode, opens said first clutch between said expander and said generator and closes said second clutch between said expander and said compressor; the kinetic energy generated by the expander is used to drive the compressor for cooling.
8. The forward-reverse coupled cycle combined cooling and power generation system according to claim 1, wherein the forward-reverse coupled cycle combined cooling and power generation system is driven by a medium-low temperature heat source, and the medium-low temperature heat source is industrial waste heat, solar energy or geothermal energy.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116558140A (en) * | 2023-05-12 | 2023-08-08 | 广东海洋大学 | Combined cooling and power system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116558140A (en) * | 2023-05-12 | 2023-08-08 | 广东海洋大学 | Combined cooling and power system |
| CN116558140B (en) * | 2023-05-12 | 2023-12-15 | 广东海洋大学 | Combined cooling and power system |
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