本文提出了一种抛物槽式太阳能集热与化学热泵耦合的复合发电系统,对其热力性能进行了分析,并研究了反应器中反应蒸汽温度、镜场加热给水温度等关键运行参数对系统性能的影响.研究了太阳能特征参数对系统性能的影响规律,分析了太阳直射辐照强度(DNI)高于设计工况时,储能材料氧化钙的量与DNI的关系.设计工况下,系统输出功335.7 MW,热效率为30.4％,发电效率23.6％.所提出的系统,为解决槽式太阳能单独热发电系统蒸汽参数低导致动力循环热效率低的难题提供了新途径.
A hybrid power generation system combined parabolic trough solar collectors and chemical heat pump is proposed in the paper.The thermodynamic performance of the proposed system and the effects of the key operating parameters on the performances of the system were investigated.The relationship between the direct normal irradiation (DNI) and the performance of the proposed system was disclosed.When the DNI was larger than the design condition,variation of the mass flow rate of CaO for solar energy storage with the DNI was analyzed.In the design conditions,the output work of the system is 335.7 MW the thermal efficiency of the proposed system is 30.4％,and the solar-to-electric efficiency of the proposed system can reach 23.6％.The hybrid power system proposed can improve the thermal efficiency significantly by increasing the steam parameters compared to the conventional solar parabolic trough power generating system.
参考文献
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