Mixture working medium supercritical Brayton cycle photo-thermal power generation system and power generation method

A technology of Brayton cycle and photothermal power generation, applied in solar thermal power generation, solar heating systems, solar collectors using working fluids, etc., to solve control problems, improve operating efficiency and peak shaving flexibility, and reduce power consumption Reduced effect

Pending Publication Date: 2020-10-09
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

So far, how to solve the particle-sCO 2 The control problem of the heat exchanger to ensure that the particle outlet temperature of the heat exchanger and the inlet working fluid temperature of the turbine reach the set value and operate stably has not yet been publicly reported

Method used

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  • Mixture working medium supercritical Brayton cycle photo-thermal power generation system and power generation method

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Embodiment Construction

[0019] The present invention is described in further detail below in conjunction with accompanying drawing:

[0020] refer to figure 1 , a supercritical Brayton cycle photothermal power generation system with a mixed working fluid according to the present invention, including a photothermal heat source input subsystem and a supercritical CO 2 and SF 6 Mixed working medium power cycle power generation subsystem;

[0021] The photothermal heat source input subsystem includes mirror field 1, particle heat collector 2, hot tank 3, cold tank 4 and particle / s-CO 2 In the heat exchanger 5, the radiant heat from the sun is focused by the mirror field 1 and then projected onto the particle heat collector 2. The particle outlet of the cold tank 4 is connected with the particle inlet of the particle heat collector 2, and the particle heat collector 2 The particle outlet is connected to the particle inlet of hot tank 3, and the particle outlet of hot tank 3 is connected to the particle...

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Abstract

The invention discloses a mixture working medium supercritical Brayton cycle photo-thermal power generation system and a power generation method. The system comprises a photo-thermal heat source inputsubsystem and a supercritical CO2 and SF6 mixture working medium power cycle power generation subsystem. According to the system and the method, a supercritical CO2 and SF6 mixture is taken as a working medium, and when the temperature of the working medium at an inlet of a main compressor in the photo-thermal power generation system deviates from the supercritical CO2 critical temperature greatly, the power generation efficiency of the photo-thermal power generation system can be improved remarkably. Besides, in the operation process of a cycle system, the flow of the working medium enteringa particle-sCO2 heat exchanger is adjusted through a flow division control valve, the problem about control of the particle-sCO2 heat exchanger in the system on the temperature of the working mediumat a turbine inlet can be effectively solved, and the operation efficiency and the peak regulation flexibility of the whole photo-thermal power generation system are improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of advanced high-efficiency photothermal power generation, and specifically relates to a CO 2 and SF 6 A supercritical Brayton cycle photothermal power generation system and power generation method in which the mixture is a working fluid. Background technique [0002] Actively developing solar thermal power generation technology can not only reduce the dependence on fossil energy such as coal, but also give full play to its advantages of low-cost, high-efficiency heat storage and adjustable and controllable output. Ability. Therefore, as a flexible peak-shaving power source, solar thermal power generation is considered to be the clean energy most likely to replace traditional thermal power generation, and has become an important direction for the development of renewable energy. [0003] How to improve the efficiency of the CSP power cycle system is the key to further reducing the cost of CSP. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03G6/06F01K25/06F01K25/08F24S23/77F24S60/00F24S10/30
CPCF01K25/06F01K25/08F03G6/067F24S10/30F24S23/77F24S60/00Y02E10/44Y02E10/46
Inventor 白文刚张旭伟乔永强顾正萌张纯李红智姚明宇
Owner XIAN THERMAL POWER RES INST CO LTD
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