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复合抛物面聚光器-光伏/光热与燃煤发电机组联合供能系统性能分析

DOI: 10.13334/j.0258-8013.pcsee.2014.14.005, PP. 2251-2260

Keywords: 复合抛物面聚光器-光伏/光热(CPC-PV/T)电热联用装置,扩容蒸发式太阳能蒸汽发生系统,燃煤机组,集成机制

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Abstract:

设计出独立双层流道式和回路双层流道式结构的水冷式复合抛物面聚光器-光伏/光热(CPC-PV/T)电热联用装置,分析比较2种装置的特征,CPC-PV/T集热单元之间采用蛇形对冲式连接方式;提出将多个CPC-PV/T电热联用装置并联连接组成的CPC-PV/T预热系统辅助加热燃煤机组凝结水,以及作为扩容蒸发式太阳能蒸汽发生系统(VEESG)辅助燃煤机组联合热发电的预热段2种集成方式,针对2种集成方式研究其集成机制。结果表明,联合发电系统机组热经济性随CPC-PV/T进水流量的增加成线性递增趋势;其出水温度可达90℃以上,在一定进水流量范围内,CPC-PV/T热效率随进水流量的增加而降低,随辐射强度的增强而提高;CPC-PV/T电效率随进水流量的增加呈波形递增趋势,其平均电效率、热效率分别在13.4%、42%左右。与独立的光伏或光热系统相比,CPC-PV/T占地面积小、太阳能利用率高。

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