为了对基于二次反射式聚光集热系统的光热吸储系统的建设提供理论支持，针对带有循环风机的光热吸储系统开展数值模拟和参数化分析研究。根据能量守恒方程，建立了岩石填充床的一维二相瞬态传热模型，通过MATLAB软件模拟了一个月的储热放热过程，以储热、放热、吸收效率，太阳能-〖HT5”，7”〗火〖KG-*3〗用〖HT5”〗转换比和平均出口空气温度作为系统热性能的评价指标，分析岩石颗粒直径和孔隙率对系统热性能的影响。结果表明：在30次循环结束后，系统达到稳定运行状态；岩石颗粒直径的变化对系统热性能影响较小，颗粒直径从0.03 m增至0.05 m，孔隙率、储热效率、放热效率和太阳能〖HT5”，7”〗火〖KG-*3〗用〖HT5”〗转换比下降幅度均在2%以内，平均出口空气温度由1 120 K降至1 100 K；岩石孔隙率的变化对系统热性能影响较大，孔隙率从0.8降至0.4，储热效率由96%增至98.8%，放热效率由97.9%降至92.7%，但吸收效率和太阳能-〖HT5”，7”〗火〖KG-*3〗用〖HT5”〗转换比变化幅度在0.9%内，平均出口空气温度由1 131 K降低至1 122 K。

In order to provide theoretical support for the construction of the integrated photothermal receiverstorage system based on the secondary reflection type spotlight thermal collecting system,the numerical simulation and parametric analysis study for the integrated photothermal receiverstorage system with circulating fan were carried out.According to the energy conservation equation,the onedimensional twophase transient heat transfer mode of the rockpacked bed was established to simulate the onemonth heat storage and release processes by using the MATLAB software.The heat storage and release efficiencies,absorption efficiency,solartoexergy conversion ratio and average outlet air temperature were selected as the thermal performance evaluation indexes of the system,so that the influence of rock particle diameter and porosity on the system thermal performance was analyzed.The results show that the system reaches a stable operating state after the completion of 30 cycles.The change of rock particle diameter has little effect on the system thermal performance,when the particle diameter increases from 0.03 m to 0.05 m,〖JP2〗 the porosity,heat storage and release efficiencies and solartoexergy conversion ratio all decrease within the range of 1.6%,and the average outlet air temperature decreases from 1 120 K to 1 100 K.The change of rock porosity has great influence on the system thermal performance,the porosity decreases from 0.8 to 0.4,the heat storage efficiency increases from 96% to 98.8%,the heat release efficiency decreases from 97.9% to 92.7%,but the absorption efficiency and the solartoexergy conversion ratio change within the range of 0.9%,and the average outlet air temperature decreases from 1 131 K to 1 122 K.

TK513.5

国家自然科学基金（51736006）