全玻璃真空太阳集热管光—热性能

从能量平衡议程导出全玻璃真空太阳集热管的3个光－热性能参数，即热损系数UTL、闷晒太阳曝辐量H和空晒性能参数Y与真空热管理的罩管玻璃的太阳透射比τ、选择性吸收表面的太阳吸收比a、发射比ε、和集热管内的气体压强p，太阳辐照度、环境温度和真空太阳集热管的几何尺寸等函数关系。理论计算的真空太阳集热管的3个热性能参数与实验的结果比较一致。上述全玻璃真空太阳集热管的光－热性能参数已经被国家标准《全玻璃真空太阳集热管》（GB／T17049－1997）采用。

SOLAR THERMAL PERFORMANCE OF ALL-GLASS EVACUATED COLLECTOR TUBES

Three solar thermal parameters,i.e.heat loss coefficient U_ LT,irradiation H and stagnation parameter Y of all-glass evacuated collector tubes were derived on the basis of energy balance equation,which depends on solar transmittance of cover glass tube,solar absorptance and thermal emittance of the selective absorbing surface and gas pressure in the jacket between cover and inner glass tubes,and solar irradiance,temperatures and the geometry of the collector tube.Calculated results of solar thermal parameters of all-glass evacuated collector tubes agree well with experiments.These solar thermal parameters of all-glass evacuated collector tube were adopted by China national standard GB/T 17049-1997.