太阳辐射对高温热管接收器传热的影响

Effect of solar radiation on heat transfer of high temperature heat pipe solar power receiver

为了研究高温热管太阳能接收器的传热性能,研究了其基本传热元件——高温热管在相应工作条件下的导热性能.基于高温热管半周向加热条件下传热特性试验的结论,研究了高温热管接收器工作时太阳辐射与热管温差的对应关系,从而得出太阳直射辐射与高温热管当量导热系数的关系.研究结果表明:太阳辐射强度对高温热管的当量导热系数具有重要影响,随着太阳辐射的增强,高温热管当量导热系数不断增大,当太阳辐照度1 000 W/m2时,当量导热系数达11 400 W/(m.K).表明高温热管太阳能接收器在工作环境中,太阳辐射越强,传热性能越好.

To investigate the heat transfer performance of high temperature heat pipe solar power receiver, the heat conductive performance under corresponding conditions on its basic heat transfer element and high temperature heat pipe was studied. The variation relationship of the solar radiation and the equivalent ther- mal conductivity during the high temperature heat pipe receiver working was analyzed, based on the conclu- sion of heat transfer characteristic experiments for high temperature heat pipe at semi-circle heated. Consequently, the relationship between the solar radiation and the surface temperature of heat pipe condenser section was obtained. The results show that the solar radiation intensity has an important effect on the effec- tively thermal conductivity of the high temperature heat pipe. The equivalent thermal conductivity increas- esd with the increase of the solar radiation intensity. When the solar radiation intensity was 1000 W/m^2, the equivalent thermal conductivity increased to 11 400 W/（m-K）. The stronger solar radiation will lead to higher heat transter performance during high temperature heat pipe solar power receiver working.