CN215408783U - Liquid metal magnetofluid supercritical CO2 combined cycle power generation system - Google Patents
Liquid metal magnetofluid supercritical CO2 combined cycle power generation system Download PDFInfo
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- CN215408783U CN215408783U CN202121866240.1U CN202121866240U CN215408783U CN 215408783 U CN215408783 U CN 215408783U CN 202121866240 U CN202121866240 U CN 202121866240U CN 215408783 U CN215408783 U CN 215408783U
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Abstract
A liquid metal magnetohydrodynamic supercritical CO2 combined cycle power generation system comprises a supercritical CO2 cycle power generation system and a liquid metal magnetohydrodynamic power generation system; the liquid metal magnetohydrodynamic power generation system adopted by the utility model can be suitable for a low-temperature heat source, has fewer rotating parts, and has the advantages of high efficiency, simple system, low cost and the like; according to the liquid metal magnetohydrodynamic power generation system, the liquid metal-CO 2 heat exchanger is used for recovering the cold end waste heat of the supercritical CO2 circulating power generation system for power generation, so that the cold source loss can be reduced, and the energy utilization efficiency is greatly improved. The utility model realizes the graded utilization of energy according to quality.
Description
Technical Field
The utility model relates to the technical field of power generation, in particular to a liquid metal magnetofluid supercritical CO2 combined cycle power generation system.
Background
The supercritical CO2 Brayton cycle has the advantages of high thermal efficiency, simple system, compact structure, high flexibility, low cost and the like, and has wide application prospects in the fields of coal power, nuclear power, photo-thermal power generation, waste heat power generation and the like. However, the heat release temperature of the supercritical CO2 working medium at the cold end of the cycle is high, the inlet temperature of the precooler is up to more than 100 ℃, and a large amount of waste heat carried by the working medium is taken away by the circulating water, so that large energy loss is caused.
The liquid metal magnetohydrodynamic power generation system can fully utilize a low-grade heat source and reduce energy loss. The power generation device utilizes a liquid metal conductive working medium to generate an electric field under the action of electromagnetic induction by a magnetic field, and a load is connected to an electrode of a power generation channel to output current to the outside. The liquid metal is used as a conductive working medium and has the advantages of high conductivity, large specific heat, low requirement on heat source temperature and the like. The power generation system has fewer rotating parts and high power generation efficiency, can utilize supercritical CO2 power circulation cold end waste heat for power generation, reduces cold source loss and further improves energy utilization efficiency. Research finds that the research on the power generation of the supercritical CO2 power cycle and the coupling of the liquid metal magnetohydrodynamic power generation system is less, and further research is necessary.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide the liquid metal magnetofluid supercritical CO2 combined cycle power generation system, which effectively recovers the waste heat at the cold end of the supercritical CO2 power cycle by utilizing the liquid magnetofluid power generation system, and greatly improves the energy utilization efficiency.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a liquid metal magnetofluid supercritical CO2 combined cycle power generation system comprises a supercritical CO2 cycle power generation system and a liquid metal magnetofluid power generation system, wherein
The supercritical CO2 cycle power generation system comprises a compressor 1, a heat regenerator 2, a heater 3, a turbine 4, a liquid metal-CO 2 heat exchanger 5 and a precooler 6, wherein an outlet of the compressor 1, an inlet and an outlet of the high-pressure side of the heat regenerator 2, an inlet and an outlet of the heater 3, an inlet and an outlet of the turbine 4, an inlet and an outlet of the low-pressure side of the heat regenerator 2, an inlet and an outlet of the liquid metal-CO 2 heat exchanger 5CO2 side, an inlet and an outlet of the precooler 6 and an inlet of the compressor 1 are sequentially communicated to form a closed system;
the liquid metal magnetohydrodynamic power generation system comprises an electromagnetic pump 8, a liquid metal-CO 2 heat exchanger 5, a low-boiling point working medium turbine 9, a condenser 10, a low-boiling point working medium pump 11, a mixing chamber 12, a magnetohydrodynamic power generator 13 and a separator 7, wherein a liquid metal outlet of the separator 7, an inlet and an outlet of the electromagnetic pump 8, a liquid metal side inlet and an outlet of the liquid metal-CO 2 heat exchanger 5 and a liquid metal inlet of the mixing chamber 12 are communicated, a low-boiling point working medium outlet of the separator 7, an inlet and an outlet of the low-boiling point working medium turbine 9, an inlet and an outlet of the condenser 10, an inlet and an outlet of the low-boiling point working medium pump 11 and a low-boiling point working medium inlet of the mixing chamber 12 are communicated, and a mixed working medium outlet of the mixing chamber 12, an inlet and an outlet of the magnetopower generator 13 and a mixed working medium inlet of the separator 7 are communicated.
The electromagnetic pump 8, the liquid metal-CO 2 heat exchanger 5 and the inlet and outlet pipelines of the electromagnetic pump circulate liquid metal.
And the low-boiling point working medium turbine 9, the condenser 10, the low-boiling point working medium pump 11 and the inlet and outlet pipelines thereof circulate low-boiling point organic working media.
The gaseous low boiling point working medium separated by the separator 7 enters the low boiling point working medium turbine 9 to perform expansion and work, so that energy loss can be reduced, and the work capacity of the system can be improved.
The electromagnetic pump 8 drives the liquid metal flow.
A method for operating a liquid metal magnetofluid supercritical CO2 combined cycle power generation system comprises the steps that a supercritical CO2 working medium is boosted by a compressor 1, is sequentially heated by a heat regenerator 2 and a heater 3, then enters a turbine 4 to expand and do work, exhaust gas enters the heat regenerator 2 to heat a cold-side low-temperature supercritical CO2 working medium, then enters a liquid metal-CO 2 heat exchanger 5 to release heat, and further enters the compressor 1 after being cooled by a precooler 6 to complete supercritical CO2 closed cycle.
The liquid metal is driven by an electromagnetic pump 8 to flow through a liquid metal-CO 2 heat exchanger 5, after waste heat carried by a working medium at the cold end of supercritical CO2 power cycle is recovered, the liquid metal enters a mixing chamber 12 to be mixed with a low-boiling point working medium and is heated and vaporized, the vaporized low-boiling point working medium carries the liquid metal to enter a magnetofluid generator 13 to cut a magnetic induction line for power generation, the discharged mixed working medium is separated into a gaseous low-boiling point working medium and the liquid metal again in a separator 7, the liquid metal enters the electromagnetic pump 8 again to complete closed cycle of the liquid metal, the gaseous low-boiling point working medium still has certain acting capacity and enters a low-boiling point working medium turbine 9 to expand and act, after the exhaust gas is condensed into liquid in a condenser 10, the exhaust gas is driven by a low-boiling point working medium pump 11 to enter the mixing chamber 12 to be mixed with the liquid metal again, and closed cycle of the low-boiling point working medium is completed.
The utility model has the beneficial effects that:
1. the liquid metal magnetohydrodynamic power generation system adopted by the utility model can be suitable for a low-temperature heat source, has fewer rotating parts, and has the advantages of high efficiency, simple system, low cost and the like.
2. According to the utility model, the liquid metal magnetohydrodynamic power generation system is utilized to recover the waste heat at the cold end of the supercritical CO2 power cycle, so that the energy loss can be reduced, the energy utilization efficiency is greatly improved, and the energy graded utilization is realized.
Drawings
FIG. 1 is a schematic diagram of a liquid metal magnetofluid supercritical CO2 combined cycle power generation system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in figure 1, the liquid metal magnetofluid supercritical CO2 combined cycle power generation system comprises a supercritical CO2 cycle power generation system and a liquid metal magnetofluid power generation system, wherein
The supercritical CO2 cycle power generation system comprises a compressor 1, a heat regenerator 2, a heater 3, a turbine 4, a liquid metal-CO 2 heat exchanger 5 and a precooler 6, wherein an outlet of the compressor 1, an inlet and an outlet of the high-pressure side of the heat regenerator 2, an inlet and an outlet of the heater 3, an inlet and an outlet of the turbine 4, an inlet and an outlet of the low-pressure side of the heat regenerator 2, an inlet and an outlet of the liquid metal-CO 2 heat exchanger 5CO2 side, an inlet and an outlet of the precooler 6 and an inlet of the compressor 1 are sequentially communicated to form a closed system;
the liquid metal magnetohydrodynamic power generation system comprises an electromagnetic pump 8, a liquid metal-CO 2 heat exchanger 5, a low-boiling point working medium turbine 9, a condenser 10, a low-boiling point working medium pump 11, a mixing chamber 12, a magnetohydrodynamic power generator 13 and a separator 7, wherein a liquid metal outlet of the separator 7, an inlet and an outlet of the electromagnetic pump 8, a liquid metal side inlet and an outlet of the liquid metal-CO 2 heat exchanger 5 and a liquid metal inlet of the mixing chamber 12 are communicated, a low-boiling point working medium outlet of the separator 7, an inlet and an outlet of the low-boiling point working medium turbine 9, an inlet and an outlet of the condenser 10, an inlet and an outlet of the low-boiling point working medium pump 11 and a low-boiling point working medium inlet of the mixing chamber 12 are communicated, and a mixed working medium outlet of the mixing chamber 12, an inlet and an outlet of the magnetopower generator 13 and a mixed working medium inlet of the separator 7 are communicated.
In a preferred embodiment of the present invention, the electromagnetic pump 8, the liquid metal-CO 2 heat exchanger 5, and the inlet and outlet pipes thereof are configured to circulate liquid metal.
In a preferred embodiment of the present invention, the low boiling point working medium turbine 9, the condenser 10, the low boiling point working medium pump 11 and the inlet and outlet pipelines thereof circulate the low boiling point organic working medium.
As a preferred embodiment of the utility model, the gaseous low boiling point working medium separated by the separator 7 enters the low boiling point working medium turbine 9 to perform expansion and work, so that energy loss can be reduced, and the work capacity of the system can be increased.
As the preferred embodiment of the utility model, the electromagnetic pump 8 is used for driving the liquid metal to flow, and has the advantages of high efficiency, compact structure, reliable operation, good sealing performance and the like.
As shown in fig. 1, an operation method of a liquid metal magnetofluid supercritical CO2 combined cycle power generation system is characterized in that a supercritical CO2 working medium is boosted by a compressor 1, and is sequentially heated by a heat regenerator 2 and a heater 3, then enters a turbine 4 to expand and do work, exhaust gas enters the heat regenerator 2 to heat a cold-side low-temperature supercritical CO2 working medium, then enters a liquid metal-CO 2 heat exchanger 5 to release heat, and enters the compressor 1 after being further cooled by a precooler 6, and supercritical CO2 closed cycle is completed.
The liquid metal is driven by an electromagnetic pump 8 to flow through a liquid metal-CO 2 heat exchanger 5, after waste heat carried by a working medium at the cold end of supercritical CO2 power cycle is recovered, the liquid metal enters a mixing chamber 12 to be mixed with a low-boiling point working medium and is heated and vaporized, the vaporized low-boiling point working medium carries the liquid metal to enter a magnetofluid generator 13 to cut a magnetic induction line for power generation, the discharged mixed working medium is separated into a gaseous low-boiling point working medium and the liquid metal again in a separator 7, the liquid metal enters the electromagnetic pump 8 again to complete closed cycle of the liquid metal, the gaseous low-boiling point working medium still has certain acting capacity and enters a low-boiling point working medium turbine 9 to expand and act, after the exhaust gas is condensed into liquid in a condenser 10, the exhaust gas is driven by a low-boiling point working medium pump 11 to enter the mixing chamber 12 to be mixed with the liquid metal again, and closed cycle of the low-boiling point working medium is completed.
Claims (5)
1. A liquid metal magnetic fluid supercritical CO2 combined cycle power generation system is characterized in that: comprises a supercritical CO2 cycle power generation system and a liquid metal magnetohydrodynamic power generation system, wherein
The supercritical CO2 cycle power generation system comprises a compressor (1), a heat regenerator (2), a heater (3), a turbine (4), a liquid metal-CO 2 heat exchanger (5) and a precooler (6), wherein an outlet of the compressor (1), an inlet and an outlet of a high-pressure side of the heat regenerator (2), an inlet and an outlet of the heater (3), an inlet and an outlet of the turbine (4), an inlet and an outlet of a low-pressure side of the heat regenerator (2), an inlet and an outlet of a CO2 side of the liquid metal-CO 2 heat exchanger (5), an inlet and an outlet of the precooler (6) and an inlet of the compressor (1) are sequentially communicated to form a closed system;
the liquid metal magnetohydrodynamic power generation system comprises an electromagnetic pump (8), a liquid metal-CO 2 heat exchanger (5), a low boiling point working medium turbine (9), a condenser (10), a low boiling point working medium pump (11), a mixing chamber (12), a magnetohydrodynamic power generator (13) and a separator (7), the liquid metal outlet of the separator (7), the inlet and the outlet of the electromagnetic pump (8) are communicated with the liquid metal side inlet and the outlet of the liquid metal-CO 2 heat exchanger (5) and the liquid metal inlet of the mixing chamber (12), the separator (7) is communicated with the low boiling point working medium outlet, the low boiling point working medium turbine (9) inlet and outlet, the condenser (10) inlet and outlet, the low boiling point working medium pump (11) inlet and outlet and the mixing chamber (12) low boiling point working medium inlet, the mixed working medium outlet of the mixing chamber (12), the inlet and the outlet of the magnetofluid generator (13) and the mixed working medium inlet of the separator (7) are communicated.
2. The liquid metal mhd supercritical CO2 combined cycle power generation system according to claim 1, characterized in that the electromagnetic pump (8), the liquid metal-CO 2 heat exchanger (5) and its inlet and outlet piping are circulating liquid metal.
3. The liquid metal magnetofluid supercritical CO2 combined cycle power generation system according to claim 1, wherein the low boiling point working medium turbine (9), the condenser (10), the low boiling point working medium pump (11) and the inlet and outlet pipelines thereof are filled with low boiling point organic working medium.
4. The liquid metal magnetofluid supercritical CO2 combined cycle power generation system according to claim 1, wherein the gaseous low boiling point working medium separated by the separator (7) enters a low boiling point working medium turbine (9) to expand and do work, so that energy loss can be reduced, and system working capacity can be increased.
5. The liquid metal mhd supercritical CO2 combined cycle power generation system according to claim 1, where the electromagnetic pump (8) drives liquid metal flow.
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| CN202121866240.1U CN215408783U (en) | 2021-08-11 | 2021-08-11 | Liquid metal magnetofluid supercritical CO2 combined cycle power generation system |
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| CN202121866240.1U CN215408783U (en) | 2021-08-11 | 2021-08-11 | Liquid metal magnetofluid supercritical CO2 combined cycle power generation system |
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