槽式太阳能电站集热管热性能测试

采用硅碳棒加热技术和热平衡法测试了桑普生产的具有自主知识产权的槽式太阳能电站集热管的热性能。在40～300℃温度范围内,共测试8个工况下集热管热性能。实验结果显示,集热管中低温性能与肖特公司的PTR70相差不大,完全满足中低温槽式太阳能电站和其他太阳能中低温利用领域的应用。红外图像结果表明,玻璃-金属封接温度明显高于玻璃外管温度,对集热管进行理论分析时不能忽略此部分漏热量。实验数据的获得为国内太阳能槽式电站的设计、建设提供了实验参数,为集热管漏热测试相关标准的制定提供了基础。

HEAT LOSS TESTING OF PARABOLIC TROUGH SOLAR RECEIVER

The heat loss of the parabolic trough receiver manufactured by SunPu with full intellectual propriety rights was tested using thermal equilibrium method and silicon carbide rod heating technology.The performance of the receiver was tested under eight conditions between 40℃ and 300℃.Experiment results showed that the performance of the receiver is nearly the same compared to Schott’s PTR70 receiver at low-and-medium temperature.It can be used for solar parabolic troughs receivers and other fields of solar energy collecting at low-and-medium temperature.Infrared pictures showed that the temperature of glass to metal sealing is obviously higher than that of the glass cover.Thus the heat loss of the glass to metal sealing should not be ignored.The experiment results provide references for the design and construction of domestic parabolic trough solar power plant and offer bases for the set-up of standard of heat loss testing for parabolic trough solar receiver.