摘要：

真空集热管是槽式太阳能热发电系统聚光集热器的关键部件,其热损失的大小直接关系到系统的光-热效率。通过对由6根真空集热管组成的13 m管道的热损失分析，结果表明，在导热油温度105～313℃的范围内，辐射散热损失占总的热损失的70%～90%；准静态平衡法测得的热损失较稳态平衡法测得的热损失大，在高温时（290℃）测得的热损失是稳态平衡法的1.18倍；同SCHOTT

关键词: 槽式聚光集热器, 真空集热管, 热损失, 准静态平衡法

Abstract:

The receiver, whose heat loss directly affects the conversion of efficiency from optic to thermal, is a key component of the parabolic trough collector.By analyzing the heat loss of 13 m pipeline which is constructed by six two-meter receivers, the results show that the radiant heat loss is 70% to 90% of the total heat loss when oil’s temperature from 105℃ to 313℃.The heat loss measured by quasi-static equilibrium method is larger than that measured by steady-state equilibrium method, and at high temperature（290℃）the former is 1.18 times as high as the latter.The heat loss is 1.2 times bigger than that of SCHOTT’s PTR70.

Key words: 槽式聚光集热器, 真空集热管, 热损失, 准静态平衡法