太阳能辅助燃煤发电系统经济性分析

Solar-auxiliary Coal-fired Power Generation System Thermal Economic Analysis

介绍了太阳能辅助锅炉受热面替代部分省煤器作用和太阳能辅助给水回热加热的两种发电系统。应用等效热降法对这两种太阳能辅助燃煤发电集成方案的热经济指标进行了计算与比较,选择了太阳能辅助给水回热加热为优化的集成方案。对槽式集热器的换热效率,光热电转换效率及投资节煤比3个技术经济性相关指标进行研究,在太阳能辅助给水回热加热的方案中,通过综合比较利用太阳能产生的汽替换各级抽汽的计算结果后,得出了替换第六级抽汽最为合理的结论。

Two power generation systems were introduced about solar assisted part replace of boiler economizer heating surface effects and the solar-assisted heating feed water regenerator. It was calculated and compared these two types of solar assisted heat economic indicators coal-fired integrated solutions by using of Equivalent Heat Drop. It was selected a solarassisted water heating for the optimization of regenerative integrated solution. , Three related indicators of technical and economic were studied On heat transfer efficiency of trough collector and the light thermoelectric conversion efficiency as well as investment in coal saving ratio. In the solar thermal heating auxiliary feedwater back scheme, By comprehensive comparison of the use of solar energy to produce steam to replace the calculation of results at all levels extraction. It was obtained the most reasonable conclusion of replacing sixth stage extraction.