抛物槽式太阳能吸热管热损失研究  

Parabolic trough receiver heat loss researching

作　　者：付旭强 王秀春[1] 雷东强[2] 张婉姣 

机构地区：[1]河北工业大学能源与环境工程学院,天津300401 [2]中国科学院太阳能热利用及光伏系统重点实验室(中国科学院电工研究所),北京100190

出　　处：《节能》2016年第7期22-24,30,共4页Energy Conservation

摘　　要：利用稳态平衡的方法测出了抛物槽式太阳能吸热管的热损，并拟合出了公式，为吸热管热性能提供了重要参数。分析计算了吸热管端部保温部分热损失以及金属管的膨胀量、风速和环境温度对热损的影响，结果表明：吸热管端部热损比较大，占总热损7．3％-9．1％，在槽式太阳能热发电站运行时也应该做好端部的保温；吸热管温度越高，热损越大；风速越大，环境温度越高，热损越大，但风速和环境温度影响较小；热损随着金属管的膨胀量的增大而减小，但是热损变化微乎其微，可以不加考虑。The parabolic trough receiver heat loss is measured by the static balance method and fitting formula. It provides an important parameter for thermal performance of the parabolic trough receiver. In addition,this paper analyzes and calculates heat loss of the absorber end. Several major factors that can influence heat loss were analyzed such as the expansion of the metal absorber,wind velocity and ambient temperature. The results showthat The heat loss of absorber end is lager,and 7. 3%-9. 1% of total heat loss,the trough type solar thermal power plants should also do a good job in the end of heat preservation when running; The higher absorber temperature,the greater the heat loss; Heat loss is much more when the wind velocity and ambient temperature is higher. But the wind velocity and ambient temperature influence is small; The expansion of the metal is higher,the heat loss is greater. But heat loss changes little,then without a second thought.

关 键 词：槽式真空集热管 热损失 吸收管 端部损失 

分 类 号：TK112[动力工程及工程热物理—热能工程]