Performance Analysis on a Solar Aided Coal-Fired Power Generation System with Simultaneous Integration of Trough and Tower Solar Collectors

doi:10.11930/j.issn.1004-9649.201803131

Abstract

Abstract: Due to the increasingly severe fossil energy shortages and environmental pollutions, as a type of clean and renewable energy sources, solar energy has drawn wide attentions and been intensively developed thanks to its benefits of being abundant, easy to use and non-polluting. In this paper, a new solar energy aided coal-fired power generation system is proposed which integrates trough and tower solar field into a typical 1 000 MW coal-fired power plant. Then the topics are analyzed such as the amount of coal saving, the solar-to-electricity conversion efficiency, and the boiler thermal efficiency of this system as well as the economic expense of the new system. From the results the new system has exhibited better thermodynamic performance than the traditional coal-fired power generation system such that the solar energy can be utilized maximally. Under the THA condition, the standard coal consumption rate of the new system is reduced by 9 g/(kW·h). With the increase of the percentage of feed water heated by solar energy, the highest solar-to-electricity efficiency of the new system can rise up to 25.55%. Moreover, the levelized cost of electricity of the solar energy in the new system is 0.81 yuan/(kW·h), lower than 1.15 yuan/(kW·h) of pure solar thermal power station. Apparently the new system has shown better economic performance.

Key words: tower solar energy, parabolic trough solar energy, boiler, thermal efficiency, economic performance analysis

CLC Number:

TK513

YANG Hui, DUAN Liqiang, WANG Zhen, LIU Yulei. Performance Analysis on a Solar Aided Coal-Fired Power Generation System with Simultaneous Integration of Trough and Tower Solar Collectors[J]. Electric Power, 2019, 52(7): 99-107.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201803131

https://www.electricpower.com.cn/EN/Y2019/V52/I7/99

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