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- Title
光热吸储系统填充床多孔结构参数研究.
- Authors
李秀秀; 杨嵩; 王军; 黄达
- Abstract
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. 05m, the porosity, heal 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 1120 K to 1100 K. The change of rock porosity has great influence on the system thermal pe1formance, 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 1131 K to 1122 K
- Publication
Journal of Engineering for Thermal Energy & Power / Reneng Dongli Gongcheng, 2021, Vol 36, Issue 11, p118
- ISSN
1001-2060
- Publication type
Article
- DOI
10.16146/j.cnki.rndlgc.2021.12.018