抛物槽集热器的能量效率  

Experimental research on energy efficiency of the parabolic trough collector

作　　者：刘毓伟[1] 陈滨[1] 庄智[1] 郑洪男[1] 

机构地区：[1]大连理工大学建筑环境与新能源研究所,辽宁大连116024

出　　处：《可再生能源》2005年第5期7-11,共5页Renewable Energy Resources

摘　　要：对以镜面不锈钢板为反光材料的抛物槽集热器的能量效率进行了研究,分析了光学效率、热损失对能量效率的影响,计算出有空气夹层的接收器的总热损系数。试验测得的能量效率为21.1%,光学效率为23.9%,总热损系数为10.45W/(m2.℃)。通过对试验数据的分析得知,光学效率是影响能量效率的主要因素,吸收管的传导热损失较辐射热损失大,若将接收器内的空气夹层抽成真空,会大大地减少热损失。The energy efficiency of the parabolic trough collector with the mirror-like stainless steel plate as the material of the reflector was experimentally evaluated. The effect of the optical efficiency and the heat loss on the energy efficiency was analyzed. And the heat loss coefficient of the receiver with air between the absorber and the glass tube was calculated. The energy efficiency and the optical efficiency was 21.1% and 23.9% respectively. The optical efficiency was the main impact factor of the energy efficiency. The heat loss coefficient of the receiver was 10.45 W/m^2·℃. The heat loss by conduction was more than that by radiation. So if the evacuated space between the absorber and the glass tube can be got, the heat loss will decrease dramatically.

关 键 词：抛物槽集热器 能量效率 光学效率 热损系数 

分 类 号：TK513.1[动力工程及工程热物理—热能工程]