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Power generation system

A power generation system and thermochemical technology, applied in the field of supercritical carbon dioxide Brayton cycle power generation system, can solve the problems of limiting the overall efficiency of supercritical carbon dioxide Brayton cycle

Pending Publication Date: 2022-04-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of high temperature corrosion and molten salt decomposition, the average operating temperature of molten salt is 565°C, which greatly limits the overall efficiency of the supercritical carbon dioxide Brayton cycle

Method used

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no. 1 approach

[0041] see figure 1 As shown, the present invention provides a power generation system, including a heating device 1, a working device 2, a cooling device 3, and a booster device 4 that are sequentially connected to form a medium circulation loop through pipelines. The medium circulation loop is sequentially connected to form a loop. The supercritical carbon dioxide Brayton cycle loop is based on supercritical carbon dioxide as the circulating medium. The power generation system also includes a thermochemical heat storage unit 5 connected to the heating device 1. The thermochemical heat storage unit 5 stores external energy for conversion The heat energy, or provide the heat source required by the heating device 1 to heat the circulating medium by releasing the stored heat energy.

[0042] Specifically, the thermochemical heat storage unit can convert external energy into thermal energy storage under specified temperature conditions, and can also react with oxygen to release h...

no. 2 approach

[0067] Such as image 3 , Figure 4 As shown, the third embodiment of the present invention provides a power generation system, and has basically the same structure as the first embodiment and the second embodiment, the difference is that the thermochemical heat storage module 521 is a metal oxide with electrical conductivity The output end of the off-peak electricity / waste electricity delivery device is connected to the thermochemical heat storage module 521 through wires, and an electric energy transmission switch 511 is provided on the wires.

[0068] According to this technical solution, when heat storage is performed, the metal oxide heat storage material is directly energized by using the grid valley power / discarded power transmission device, which saves the cost of electric heating elements and simplifies the structural complexity of the supercritical carbon dioxide Brayton cycle system. , and realize the reuse of waste electric energy by converting waste electric ener...

no. 3 approach

[0075] see Figure 5 , Image 6 As shown, in a preferred embodiment of the present invention, the external energy supply device 51 is a thermal energy supply device, and the thermal energy supply device is connected with the air inlet 522 of the heat storage tank 52 through a first pipeline, and the thermal energy supply device supplies heat to the heat storage tank through the first pipeline. The hot air delivered in the tank 52 provides the thermal energy and gas required for the reaction of the thermochemical heat storage module 521 . Further, the air outlet 523 of the heat storage tank 52 is connected to the inlet of the thermal energy supply device through the second pipeline, and the exhaust gas generated in the heat storage tank 52 enters the thermal energy supply device through the second pipeline, reducing heat loss and realizing the circulation of thermal energy , and the exhaust gas generated in the heat storage tank 52 has a relatively high oxygen content. The fi...

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Abstract

The invention provides a power generation system which comprises a heating device, an acting device, a cooling device and a supercharging device which are sequentially connected through pipelines to form a medium circulation loop, the medium circulation loop is a supercritical carbon dioxide Brayton circulation loop with supercritical carbon dioxide as a circulation medium, and the power generation system further comprises a thermochemical heat storage unit. And the thermochemical heat storage unit is connected with the heating device, stores heat energy converted from external energy, or provides a heat source required by the heating device for heating the circulating medium by releasing the stored heat energy. The thermochemical heat storage unit can provide a proper high-temperature heat source for the supercritical carbon dioxide Brayton cycle, the thermochemical heat storage unit and the supercritical carbon dioxide Brayton cycle are organically combined, high-temperature heat storage and heat exchange can be achieved, the overall heat efficiency of the system is effectively improved, and the energy consumption is reduced. The problems that an existing heat storage system is low in heat efficiency, and the heat storage and release temperature range is limited are solved.

Description

technical field [0001] The invention relates to the technical field of power generation, in particular to a supercritical carbon dioxide Brayton cycle power generation system based on thermochemical energy storage. Background technique [0002] Efficient use of renewable energy and advanced energy-saving technologies are important forces to promote the realization of the "Double Carbon Target". In recent years, renewable energy such as wind power and photovoltaics has developed rapidly, and the total installed capacity and power generation of renewable energy have soared. However, due to various reasons such as the slowdown in the growth of social electricity demand, the consumption capacity of renewable energy is insufficient, and there are still a large number of abandoned wind and light. The problem of renewable energy consumption is the result of the long-term unbalanced and uncoordinated development of the energy system. In terms of power peak regulation, thermal power...

Claims

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Application Information

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IPC IPC(8): F01K25/10F01D15/10F28D20/00
CPCF01K25/103F01D15/10F28D20/003Y02E60/14
Inventor 肖刚宁泽宇祝培旺
Owner ZHEJIANG UNIV