CN115750005A - Combined cycle system integrating heat supply, power generation and refrigeration - Google Patents
Combined cycle system integrating heat supply, power generation and refrigeration Download PDFInfo
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 58
- 238000010248 power generation Methods 0.000 title claims abstract description 36
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- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 50
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- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
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- 239000002918 waste heat Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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Abstract
The invention discloses a combined cycle system integrating heat supply, power generation and refrigeration, which comprises a supercritical carbon dioxide Brayton cycle subsystem, and comprises: the heater is used for providing a heat source for the supercritical carbon dioxide Brayton cycle subsystem; the high-temperature turbine is used for generating power by utilizing a heat source output by the heater; the cooler I is used for cooling the carbon dioxide medium which circulates and refluxes; further comprising: the steam Rankine cycle subsystem is used for supplying power and heating a user by using working exhaust gas of the high-temperature turbine as a heat source; and the jet flow refrigeration circulation subsystem is arranged at the upstream of the cooler and used for refrigerating the carbon dioxide medium before entering the cooler I. The combined cycle system is beneficial to realizing multi-level and multi-grade utilization of energy and improving the utilization rate of the energy.
Description
Technical Field
The invention relates to the technical field of power cycle systems, in particular to a combined cycle system integrating heat supply, power generation and refrigeration.
Background
The supercritical carbon dioxide power conversion technology has the technical advantages of system simplification, high efficiency, small volume, easiness in realization of modular construction and the like, and the application of the supercritical carbon dioxide Brayton cycle to realize power generation is a power generation technology with great prospect. The use of a typical recompression brayton cycle alone has difficulty achieving more energy utilization than thermoelectric conversion.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a combined cycle system which integrates heat supply, power generation and refrigeration, can realize free switching of refrigeration and heating, meets the requirements of power generation, refrigeration and heat supply scenes, realizes multi-level and multi-grade utilization of energy, improves the energy utilization rate, and particularly can realize three energy utilization forms of a cycle structure under the condition that the system is inconvenient to transport due to the requirement on multiple energy in western remote areas.
The invention is realized by the following technical scheme:
a combined cycle system integrating heat supply, power generation and refrigeration, which comprises a supercritical carbon dioxide Brayton cycle subsystem, and comprises: the heater is used for providing a heat source for the supercritical carbon dioxide Brayton cycle subsystem; the high-temperature turbine is used for generating power by utilizing a heat source output by the heater; the cooler I is used for cooling the carbon dioxide medium circulated and returned;
further comprising: the steam Rankine cycle subsystem is used for supplying power and heating a user by using working exhaust gas of the high-temperature turbine as a heat source; and the jet flow refrigeration circulation subsystem is arranged at the upstream of the cooler and used for refrigerating the carbon dioxide medium before entering the cooler I.
Aiming at the conditions that the energy utilization rate is low and the energy multi-level utilization in remote areas is difficult at present, the invention can realize multi-level, multi-grade and high-efficiency utilization of energy, couples the steam Rankine cycle and the jet flow refrigeration cycle, realizes the combined cycle integrating the power generation, refrigeration and heat supply functions, creatively adopts the structural form of multi-level heat regeneration, flow division, turbine division and recompression in the Brayton cycle at the bottom layer, introduces the steam Rankine cycle at the outlet of the high-temperature turbine, introduces the jet flow refrigeration cycle in front of the inlet of the main cooler, improves the thermoelectric conversion efficiency and the energy utilization rate, and reduces the equipment volume of the main cooler.
The system can be applied to a supercritical carbon dioxide power generation system, can realize free switching of refrigeration and heating, meets the requirements of power generation, refrigeration and heating scenes, realizes multi-level utilization of energy, improves the utilization rate of the energy, and can realize utilization of three kinds of energy of a circulating structure especially under the condition that the west remote areas have requirements on various energy sources and are inconvenient to transport.
Further optionally, the supercritical carbon dioxide brayton cycle subsystem further comprises a low-temperature turbine, a high-temperature regenerator and a medium-temperature regenerator; the input end of the low-temperature turbine is connected with the output end of the cold side of the high-temperature regenerator; the exhaust gas output end of the low-temperature turbine is connected with the hot side input end of the medium-temperature heat regenerator; the cold side output end of the medium-temperature heat regenerator is connected with the input end of the heater and the cold side input end of the high-temperature heat regenerator; the output end of the heater is connected with the input end of the high-temperature turbine, and the exhaust gas output end of the high-temperature turbine is connected with the hot side input end of the high-temperature regenerator; a steam Rankine cycle subsystem is connected to a connecting line between the high-temperature turbine and the high-temperature heat regenerator; the hot side output end of the high-temperature regenerator is connected with the hot side input end of the medium-temperature regenerator.
Further optionally, the supercritical carbon dioxide brayton cycle subsystem further comprises a low-temperature heat regenerator, and a hot-side input end of the low-temperature heat regenerator is connected with a hot-side output end of the medium-temperature heat regenerator; and the cold side output end of the low-temperature heat regenerator is connected with the cold side input end of the medium-temperature heat regenerator.
Further optionally, the supercritical carbon dioxide brayton cycle subsystem further comprises a recompressor and a main compressor; the hot side output end of the low-temperature heat regenerator is connected with the input end of the cooler I and the input end of the recompressor; a jet flow refrigeration cycle subsystem is connected to a connecting pipeline of the low-temperature heat regenerator and the cooler I; the output end of the cooler I is connected with the input end of the main gas compressor, and the output end of the main gas compressor is connected with the cold side input end of the low-temperature heat regenerator; and the output end of the recompressor is connected with the cold side input end of the medium temperature regenerator.
Further optionally, the recompressor is arranged coaxially with the high-temperature turbine; and/or the main compressor and the low-temperature turbine are coaxially arranged.
Further optionally, the steam rankine cycle subsystem includes a steam generator; the hot side input end of the steam generator is connected with the exhaust gas output end of the high-temperature turbine; the steam generator is used for realizing heat exchange between a carbon dioxide medium of the supercritical carbon dioxide Brayton cycle subsystem and water of the steam Rankine cycle subsystem.
Further optionally, the steam rankine cycle subsystem further comprises a steam turbine, a heat exchanger II and a working medium pump II; the input end of the steam turbine is connected with the cold side output end of the steam generator, the output end of the steam turbine is connected with the hot side input end of the heat exchanger II, the hot side output end of the heat exchanger II is connected with the input end of the working medium pump II, and the output end of the working medium pump II is connected with the cold side input end of the steam generator; and the cold side of the heat exchanger II is used for connecting a heat user and providing a heating function.
Further optionally, the steam rankine cycle subsystem further comprises a condenser ii and a separator; and the output end of the hot side of the heat exchanger II is also connected to the input end of the condenser II, the output end of the condenser II is connected with the input end of the separator, and the output end of the separator is connected with the input end of the working medium pump II.
Further optionally, the jet refrigeration cycle subsystem comprises a heat exchanger i; the heat exchanger I is arranged at the upstream of the input end of the cooler I and used for realizing heat exchange between a carbon dioxide medium of the supercritical carbon dioxide Brayton cycle subsystem and a refrigerant of the jet flow refrigeration cycle subsystem.
Further optionally, the jet flow refrigeration cycle subsystem further comprises an ejector, a condenser I, an evaporator and a working medium pump I; the input end of the ejector is connected with the output end of the cold side of the heat exchanger I and the output end of the evaporator, and the output end of the ejector is connected with the input end of the condenser I; the output end of the condenser I is connected with the input end of the working medium pump I and the output end of the evaporator, and the output end of the working medium pump I is connected with the cold side input end of the heat exchanger I.
The invention has the following advantages and beneficial effects:
aiming at the diversified utilization of the existing energy, the invention combines the ultra-carbon Brayton power generation cycle with heat supply and refrigeration to form a combined cycle with multi-form utilization of energy, can solve the problems of single energy, low energy utilization rate and the like in some remote areas, and can relieve the traffic and transportation pressure in the remote areas.
The invention reuses the high-temperature exhaust gas which is used for doing work by the turbine, realizes secondary power generation of low-grade energy and user heating, accords with the development concept of 'carbon synthesis', adds the refrigeration sub-cycle in front of the main cooler, can fully reduce the heat exchange load of the cooler, reduces the cost and the equipment volume, and realizes the refrigeration function by the cycle. In a word, the invention provides a combined cycle which integrates power generation, heat supply and refrigeration by using a supercritical carbon dioxide multistage regenerative Brayton cycle as a bottom cycle and coupling a steam Rankine cycle and a refrigeration cycle, can realize multi-level utilization of energy, maximizes the utilization efficiency of the energy, and has wide application prospects in military and civil scenes.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the overall configuration of the combined cycle system of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a heater, 2-a high-temperature turbine, 3-a low-temperature turbine, 4-a generator, 5-a steam generator, 6-a high-temperature heat regenerator, 7-a medium-temperature heat regenerator, 8-a low-temperature heat regenerator, 9-a recompressor, 10-a main compressor, 11-a cooler I, 12-heat exchanger I, 13-ejector, 14-condenser I, 15-evaporator, 16-working medium pump I, 17-steam turbine, 18-heat exchanger II, 19-heat consumer, 20-condenser II, 21-separator, 22-working medium pump II.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Example 1
The embodiment provides a combined cycle system integrating heat supply, power generation and refrigeration, comprising:
a supercritical carbon dioxide brayton cycle subsystem, the subsystem comprising: the heater 1 is used for providing a heat source for the supercritical carbon dioxide Brayton cycle subsystem; the high-temperature turbine 2 is used for generating power by utilizing the heat source output by the heater 1; the cooler I11 is used for cooling the carbon dioxide medium which circulates and refluxes;
the steam Rankine cycle subsystem is used for supplying power and heating a user by using the working exhaust gas of the high-temperature turbine 2 as a heat source;
and the jet flow refrigeration circulation subsystem is arranged at the upstream of the cooler 11 and is used for refrigerating the carbon dioxide medium before entering the cooler I11.
The cycle that this embodiment provided is for realizing generating electricity, heat supply, refrigeration in the combined cycle of an organic whole, and wherein the bottom cycle is reposition of redundant personnel, supercritical carbon dioxide brayton cycle, and coupling steam rankine cycle secondary power generation and heat supply, coupling efflux refrigeration cycle do benefit to and realize that the energy is multi-level, the multi-grade, high efficiency utilization, collect multiple functions in an organic whole.
The jet flow refrigeration cycle subsystem is arranged in front of the bottom Brayton cycle main cooler, so that the heat exchange load of the cooler is reduced, and the size and weight of the heat exchanger can be reduced. The steam Rankine cycle setting subsystem is arranged at the outlet of the high-temperature turbine of the Brayton cycle at the bottom layer, secondary power generation is achieved, meanwhile, waste heat with the lowest grade is supplied to domestic water and heating is achieved, and energy utilization efficiency is improved.
Example 2
The embodiment provides a combined cycle system integrating heat supply, power generation and refrigeration, which is further improved on the basis of the embodiment 1,
the supercritical carbon dioxide Brayton cycle subsystem further comprises a low-temperature turbine 3, a high-temperature heat regenerator 6, a medium-temperature heat regenerator 7, a low-temperature heat regenerator 8, a recompression machine 9 and a main compressor 10, and the supercritical carbon dioxide Brayton cycle subsystem adopts three-stage heat regeneration and two-stage turbine, namely, flow division and multi-stage heat regeneration recompression Brayton cycle as bottom cycle and adopts supercritical carbon dioxide as working medium.
The input end of the low-temperature turbine 3 is connected with the output end of the cold side of the high-temperature heat regenerator 6 through a pipeline; and the exhaust gas output end of the low-temperature turbine 3 is connected with the hot side input end of the medium-temperature regenerator 7 through a pipeline.
The cold side output end of the medium temperature heat regenerator 7 is divided into two branch pipelines, one branch pipeline is connected with the input end of the heater 1, and the other branch pipeline is connected with the cold side input end of the high temperature heat regenerator 6.
The output end of the heater 1 is connected with the input end of the high-temperature turbine 2 through a pipeline, and the exhaust gas output end of the high-temperature turbine 2 is connected with the hot side input end of the high-temperature regenerator 6; and a steam Rankine cycle subsystem is connected to a connecting pipeline of the high-temperature turbine 2 and the high-temperature heat regenerator 6.
And a pipeline at the output end of the hot side of the high-temperature regenerator 6 is converged with a pipeline at the output end of the low-temperature turbine 3 and then is connected with the input end of the hot side of the medium-temperature regenerator 7.
The hot side input end of the low-temperature heat regenerator 8 is connected with the hot side output end of the medium-temperature heat regenerator 7; and the cold side output end of the low-temperature regenerator 8 is connected with the cold side input end of the medium-temperature regenerator 7.
The hot side output end of the low-temperature heat regenerator 8 is connected with the input end of the cooler I11 and the input end of the recompressor 9; and a jet flow refrigeration cycle subsystem is connected to a connecting pipeline of the low-temperature heat regenerator 8 and the cooler I11.
The output end of the cooler I11 is connected with the input end of the main compressor 10, and the output end of the main compressor 10 is connected with the cold side input end of the low-temperature heat regenerator 8; and an output end pipeline of the recompressor 9 and a cold side output end pipeline of the low-temperature heat regenerator 8 are connected with a cold side input end of the medium-temperature heat regenerator 7 after being turned round.
The recompression engine 9 and the high-temperature turbine 2 are coaxially arranged; the main compressor 10 is arranged coaxially with the low-temperature turbine 3.
Example 3
The embodiment provides a combined cycle system integrating heat supply, power generation and refrigeration, which is further improved on the basis of the embodiment 1 or 2,
the steam Rankine cycle subsystem comprises a steam generator 5, a steam turbine 17, a heat exchanger II 18, a working medium pump II 22, a condenser II 20, a separator 21 and a heat consumer 19. The hot side input end of the steam generator 5 is connected with the exhaust gas output end of the high-temperature turbine 2, and the hot side output end of the steam heat exchanger 5 is connected with the input end of the high-temperature heat regenerator 6 through a pipeline; the steam generator 5 is used for realizing heat exchange between a carbon dioxide medium of the supercritical carbon dioxide Brayton cycle subsystem and water of the steam Rankine cycle subsystem. The input end of the steam turbine 17 is connected with the cold side output end of the steam generator 5, the output end of the steam turbine 17 is connected with the hot side input end of the heat exchanger II 18, the hot side output end of the heat exchanger II 18 is connected with the input end of the working medium pump II 22, and the output end of the working medium pump II 22 is connected with the cold side input end of the steam generator 5. The cold side of the heat exchanger II 18 is used for connecting a heat user 19 and providing a heating function. The hot side output end of the heat exchanger II 18 is further connected to the input end of a condenser II 20, the output end of the condenser II 20 is connected with the input end of a separator 21, and the output end of the separator 21 is connected with the input end of a working medium pump II 22.
The jet flow refrigeration cycle subsystem comprises a heat exchanger I12, an ejector 13, a condenser I14, an evaporator 15 and a working medium pump I16. The heat exchanger I12 is arranged on the upstream of the input end of the cooler I11, the hot side input end of the heat exchanger I12 is connected with the hot side output end of the low-temperature heat regenerator 8, the hot side output end of the heat exchanger I12 is connected with the input end of the cooler I11, and the heat exchanger I12 is used for achieving heat exchange between a carbon dioxide medium of the supercritical carbon dioxide Brayton cycle subsystem and a refrigerant of the jet flow refrigeration cycle subsystem. The input of ejector 13 is connected to the cold side output of heat exchanger I12 and the output of evaporator 15, and the output of ejector 13 is connected to the input of condenser I14. The output end of the condenser I14 is divided into two branch pipelines which are respectively connected with the input end of the working medium pump I16 and the output end of the evaporator 15, and the output end of the working medium pump I16 is connected with the cold side input end of the heat exchanger I12.
As shown in fig. 1, the combined cycle structure is used for realizing secondary power generation, heating and refrigeration by combining a split-flow and three-stage regenerative supercritical carbon dioxide brayton power generation cycle with a steam rankine cycle and a jet refrigeration cycle.
The circulation flow is as follows: the high-temperature high-pressure carbon dioxide heated by the heater 1 enters the high-temperature turbine 2 to do work, the exhaust gas after doing work enters the steam generator 5, heat exchange between the carbon dioxide and water is realized in the steam generator, the carbon dioxide after heat exchange enters the high-temperature heat regenerator 6 to heat the carbon dioxide entering the low-temperature turbine 3, the carbon dioxide and the low-pressure low-temperature carbon dioxide which does work in the low-temperature turbine 3 are converged and then sequentially pass through the medium-temperature heat regenerator 7 and the low-temperature heat regenerator 8. Tapping from the outlet of the low-temperature regenerator 8: one path of the heat flows through the hot side of a heat exchanger 12, further releases heat, enters a cooler 11 for cooling, enters a main compressor 10 for pressurization after being cooled to a certain temperature, and enters the cold side of a low-temperature heat regenerator 8 for heating; the other path directly enters a recompressor 9 for pressurization, then is converged with a cold side outlet of a low-temperature heat regenerator 8, and then enters a cold side of an intermediate-temperature heat regenerator 7 for heating. Then the flow is divided from the intermediate temperature heat regenerator 7: one part of the gas enters the heater 1 directly for heating, and the other part of the gas enters the cold side of the high-temperature heat regenerator 6 for heating and then enters the low-temperature turbine 3 for doing work, so that the whole flow dividing, multi-stage heat regeneration and recompression Brayton cycle are completed.
The steam Rankine cycle working medium obtains energy in the steam generator 5 and enters the steam turbine 17 to do work for secondary power generation, waste steam which does work exchanges heat with a heat user 19 through the heat exchanger II 18 to achieve waste heat utilization, and finally the whole steam Rankine cycle is completed through the condenser II 20, the separator 21 and the working medium pump II 22.
In the jet flow refrigeration cycle, a refrigerant obtains energy from a heat exchanger I12 and enters an ejector 13, the refrigerant enters a condenser I14 for condensation and separation after jet flow vaporization refrigeration, a liquid refrigerant directly enters a working medium pump I16, the refrigerant enters the heat exchanger I12 after pressurization, a vapor-liquid mixture enters an evaporator 15 for further cooling to form a liquid working medium, and the liquid working medium directly enters the ejector 13 to complete the whole refrigeration cycle. And the whole combined cycle process is completed, wherein the refrigeration function and the steam Rankine cycle secondary power generation function can be controlled by a valve, and whether the combined cycle process is started or not is selected according to the use condition, so that the combined cycle process can be flexibly used.
The invention provides a combined cycle for integrating power generation, refrigeration and heat supply, aiming at the conditions of low energy utilization rate and difficult multi-stage energy utilization in remote areas, and integrating multiple functions into a whole to realize multi-level, multi-grade and high-efficiency energy utilization. The method is characterized in that a flow-splitting and multistage regenerative recompression Brayton cycle is used as a bottom layer cycle, supercritical carbon dioxide is used as a working medium, steam Rankine cycle secondary power generation is combined, waste heat is utilized to realize heat supply for a heat user, jet flow refrigeration is added in front of a main cooler, the heat exchange pressure of the main cooler is reduced while the circulation refrigeration is realized, and the size and the mass of equipment are further reduced.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A combined cycle system integrating heat supply, power generation and refrigeration, which comprises a supercritical carbon dioxide Brayton cycle subsystem, and comprises:
the heater (1) is used for providing a heat source for the supercritical carbon dioxide Brayton cycle subsystem;
a high temperature turbine (2) for generating electricity by using the heat source output from the heater (1);
a cooler I (11) for cooling the carbon dioxide medium circulated and refluxed;
it is characterized by also comprising:
the steam Rankine cycle subsystem is used for supplying power and heating a user by using working exhaust gas of the high-temperature turbine (2) as a heat source;
and the jet flow refrigeration circulation subsystem is arranged at the upstream of the cooler (11) and is used for refrigerating the carbon dioxide medium before entering the cooler I (11).
2. A combined cycle system integrating heat supply, power generation and refrigeration as claimed in claim 1, wherein the supercritical carbon dioxide brayton cycle subsystem further comprises a low temperature turbine (3), a high temperature regenerator (6) and a medium temperature regenerator (7);
the input end of the low-temperature turbine (3) is connected with the output end of the cold side of the high-temperature regenerator (6); the exhaust gas output end of the low-temperature turbine (3) is connected with the hot side input end of the medium-temperature regenerator (7);
the cold side output end of the medium temperature heat regenerator (7) is connected with the input end of the heater (1) and the cold side input end of the high temperature heat regenerator (6);
the output end of the heater (1) is connected with the input end of the high-temperature turbine (2), and the exhaust gas output end of the high-temperature turbine (2) is connected with the hot side input end of the high-temperature regenerator (6); a steam Rankine cycle subsystem is connected to a connecting line between the high-temperature turbine (2) and the high-temperature heat regenerator (6);
the hot side output end of the high-temperature regenerator (6) is connected with the hot side input end of the medium-temperature regenerator (7).
3. A combined cycle system integrating heat supply, power generation and refrigeration as claimed in claim 2, wherein the supercritical carbon dioxide brayton cycle subsystem further comprises a low temperature regenerator (8), and a hot side input end of the low temperature regenerator (8) is connected with a hot side output end of the medium temperature regenerator (7); the cold side output end of the low-temperature regenerator (8) is connected with the cold side input end of the medium-temperature regenerator (7).
4. A combined cycle system integrating heat supply, power generation and refrigeration as claimed in claim 3, wherein the supercritical carbon dioxide brayton cycle sub-system further comprises a recompressor (9) and a main compressor (10);
the hot side output end of the low-temperature heat regenerator (8) is connected with the input end of the cooler I (11) and the input end of the recompressor (9); a jet flow refrigeration cycle subsystem is connected to a connecting pipeline of the low-temperature heat regenerator (8) and the cooler I (11);
the output end of the cooler I (11) is connected with the input end of the main gas compressor (10), and the output end of the main gas compressor (10) is connected with the cold side input end of the low-temperature heat regenerator (8); the output end of the recompressor (9) is connected with the cold side input end of the medium temperature regenerator (7).
5. A combined cycle system integrating heating, power generation and refrigeration as claimed in claim 4, wherein the recompressor (9) is arranged coaxially with the high temperature turbine (2); and/or the main compressor (10) and the low-temperature turbine (3) are coaxially arranged.
6. A combined cycle system integrating heating, power generation and refrigeration as claimed in any one of claims 1 to 5, wherein the steam Rankine cycle subsystem comprises a steam generator (5);
the hot side input end of the steam generator (5) is connected with the exhaust gas output end of the high-temperature turbine (2); the steam generator (5) is used for realizing heat exchange between a carbon dioxide medium of the supercritical carbon dioxide Brayton cycle subsystem and water of the steam Rankine cycle subsystem.
7. A combined cycle system integrating heat supply, power generation and refrigeration as claimed in claim 6, characterized in that the steam Rankine cycle subsystem further comprises a steam turbine (17), a heat exchanger II (18) and a working medium pump II (22);
the input end of the steam turbine (17) is connected with the cold side output end of the steam generator (5), the output end of the steam turbine (17) is connected with the hot side input end of the heat exchanger II (18), the hot side output end of the heat exchanger II (18) is connected with the input end of the working medium pump II (22), and the output end of the working medium pump II (22) is connected with the cold side input end of the steam generator (5);
the cold side of the heat exchanger II (18) is used for connecting a heat user (19) and providing a heating function.
8. A combined cycle system integrating heating, power generation and refrigeration as claimed in claim 6, wherein the steam Rankine cycle subsystem further comprises a condenser II (20) and a separator (21);
the hot side output end of the heat exchanger II (18) is further connected to the input end of the condenser II (20), the output end of the condenser II (20) is connected with the input end of the separator (21), and the output end of the separator (21) is connected with the input end of the working medium pump II (22).
9. A combined cycle system integrating heating, power generation and refrigeration as claimed in any one of claims 1 to 5 wherein the jet refrigeration cycle subsystem comprises a heat exchanger I (12);
the heat exchanger I (12) is arranged at the upstream of the input end of the cooler I (11) and is used for realizing heat exchange between a carbon dioxide medium of the supercritical carbon dioxide Brayton cycle subsystem and a refrigerant of the jet flow refrigeration cycle subsystem.
10. A combined cycle system integrating heating, power generation and refrigeration as claimed in claim 9, wherein the jet refrigeration cycle subsystem further comprises an ejector (13), a condenser i (14), an evaporator (15) and a working medium pump i (16);
the input end of the ejector (13) is connected with the cold side output end of the heat exchanger I (12) and the output end of the evaporator (15), and the output end of the ejector (13) is connected with the input end of the condenser I (14);
the output end of the condenser I (14) is connected with the input end of the working medium pump I (16) and the output end of the evaporator (15), and the output end of the working medium pump I (16) is connected with the cold side input end of the heat exchanger I (12).
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Citations (16)
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