可再生能源2025，Vol.43Issue(4)：468-475,8.
遮风挡板对腔式吸热器的对流热损失影响
Effects of windshield on the convective heat loss of a cavity receiver
摘要
Abstract
Due to a large area of heat absorbing surfaces and effects of uncertain windy condition,both the convective heat loss and solar-thermal conversion efficiency of cavity receivers were unsteady.In order to reduce effects of wind on the cavity receiver performance,a novel cavity receiver design which had a windshield on its opening was investigated in the present study.The windshield could reduce the fluid flow disturbance inside the cavity,so that the convective heat transfer between the heat absorbing surfaces and ambient air were weakened,and the convective heat loss of the cavity receiver would be reduced.A solar-thermal coupling numerical model was established firstly,and then effects of windshield material and wind were studied.The results showed that the material of windshield had a big influence on the receiver convective heat loss,and the convective heat loss would increase with a solid wall windshield,while with a porous material windshield,the convective heat loss would decrease.The pressure-jump coefficient and thickness of the porous material windshield were key factors affecting its performance.As the pressure-jump coefficient increased,the optimal thickness decreased.For the optimal pressure-jump coefficient and thickness,the convective heat loss could be reduced by about 53.0%.The results in the present study could provide theoretical and technical guidance for design of cavity receivers.关键词
塔式热发电/腔式吸热器/对流热损失/遮风挡板Key words
solar power tower/cavity receiver/convective heat loss/windshield分类
能源与动力引用本文复制引用
万振杰,魏进家,方嘉宾..遮风挡板对腔式吸热器的对流热损失影响[J].可再生能源,2025,43(4):468-475,8.基金项目
国家自然科学基金国际(地区)合作与交流项目(51961135102) （地区）
河南省科技攻关项目(222102320298) （222102320298）
郑州轻工业大学博士启动金(2021BSJJ046). （2021BSJJ046）
