Supercritical carbon dioxide power generation system based on absorption heat pump waste heat recovery

An absorption heat pump and carbon dioxide technology, which is applied in heat recovery systems, machines/engines, energy-saving heating/cooling, etc., can solve the problem of insufficient utilization of waste heat from gas turbine exhaust, so as to improve cycle thermal efficiency, improve power generation efficiency, and reduce smoke exhaust. effect of temperature

Active Publication Date: 2020-04-17
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in gas-fired power plants, high-power gas-fired generator sets use gas-steam combined cycle power generation. Although the thermal efficiency of the cycle can be improved, due to the limitations of the conventional water-steam power cycle itself, the utilization of waste heat from the exhaust gas of the gas turbine is still insufficient. Sufficiently, adopting a supercritical carbon dioxide power generation system based on absorption heat pump waste heat recovery can further fully utilize the waste heat energy

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  • Supercritical carbon dioxide power generation system based on absorption heat pump waste heat recovery
  • Supercritical carbon dioxide power generation system based on absorption heat pump waste heat recovery

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specific Embodiment approach

[0023] A supercritical carbon dioxide power generation system based on absorption heat pump waste heat recovery of the present invention, its preferred specific implementation is:

[0024] include:

[0025] Supercritical carbon dioxide Brayton cycle system, absorption heat pump cycle system, traditional gas-fired Brayton cycle system and cooling system;

[0026] The supercritical carbon dioxide Brayton cycle system includes: a main compressor, a recompressor, a high-temperature regenerator, a low-temperature regenerator, a high-pressure turbine, a low-pressure turbine, a generator, a flue gas regenerator, and a condenser; The compressor and the turbine are designed with different shafts, and the flue gas regenerator is arranged between the high-pressure turbine and the low-pressure turbine;

[0027] The absorption heat pump cycle system uses a lithium bromide absorption heat pump, including a second condenser, a generator, a solution booster pump, a solution exchanger, a thro...

specific Embodiment

[0047] Such as figure 1 , figure 2 As shown, including supercritical carbon dioxide Brayton cycle system, absorption heat pump cycle system, traditional gas type Brayton cycle system and cooling system;

[0048] The supercritical carbon dioxide Brayton cycle system described therein includes: main compressor 7, recompressor 6, high temperature regenerator 2, low temperature regenerator 1, high pressure turbine 5, low pressure turbine 3, generator 4, flue gas A gas regenerator 10 and a condenser 8; the inlet of the main compressor is connected to the condenser 8, and the outlet is connected to the low-temperature regenerator 1; the inlet of the re-compressor 6 is connected to the evaporator of the absorption heat pump 9, and the outlet is connected to the high-temperature regenerator 2; The high temperature regenerator 2 is connected to the inlet of the absorber 21 of the absorption heat pump, the outlet of the absorber 21 of the absorption heat pump 9 is connected to the inl...

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Abstract

The invention discloses a supercritical carbon dioxide power generation system based on absorption heat pump waste heat recovery. The supercritical carbon dioxide power generation system comprises a supercritical carbon dioxide Brayton cycle system, an absorption heat pump cycle system, a traditional gas-fired Brayton cycle system and a cooling system. The cooling system is responsible for providing cold required for condensation of the supercritical carbon dioxide Brayton cycle system and the absorption heat pump cycle system, and the traditional gas-fired Brayton cycle system provides high-temperature heat sources for the supercritical carbon dioxide Brayton cycle system and the absorption heat pump cycle system respectively while producing most of electric energy of the entire system. The overall thermal efficiency of the system can be improved while the exhaust gas temperature of a gas turbine is reduced. The supercritical carbon dioxide Brayton cycle system heats dead steam of a high-pressure turbine by utilizing flue gas waste heat in a flue gas regenerator, the dead steam continues to drive a low-pressure turbine to work after being heated, thus, the cycle thermal efficiencyis further improved, and the power generation efficiency is improved.

Description

technical field [0001] The invention relates to a power generation technology, in particular to a supercritical carbon dioxide power generation system based on absorption heat pump waste heat recovery. Background technique [0002] Gas turbine is a power machine widely used in the world today. About 40% of the heat energy generated by the fuel of the gas turbine is converted into the output work of the power machine, and more than half of the heat is taken away by the exhaust gas and cooling water of the gas turbine. The thermal efficiency of the single-cycle gas turbine Even lower, only about 30%, the thermal efficiency of some micro gas turbines is only 20%, and there is a lot of waste of heat energy. [0003] Depending on the working conditions, the exhaust gas temperature of the gas turbine is generally above 400°C, which has a high value of waste heat recovery. At present, in gas-fired power plants, high-power gas-fired generator sets use gas-steam combined cycle power...

Claims

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Application Information

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IPC IPC(8): F01K25/10F01K13/00F01K23/02F02C6/00
CPCF01K25/103F01K13/00F01K23/02F02C6/00Y02B30/52
Inventor 刘远超钟建斌邵钶张鑫
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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