对一种多曲面复合聚焦槽式太阳能聚光集热器进行了理论与实验研究,介绍了其工作原理,对其重要的设计参数进行了计算和优化,给出了大致的取值范围。该新型槽式聚光集热器能够利用多曲面组合实现对太阳光反射聚焦,并具有在反射面上不留阴影、改善高温太阳能接收器的工作性能。实验表明,装置在低温段运行效率在45%以上。在高温段(≥80℃),效率明显高于全玻璃真空管集热器或平板型集热器,因此它在高温段运行更有优势。 A kind of multi-surface compound focusing trough solar concentrator has been studied theoretically and experimentally, its working principle is introduced, its important design parameters are calculated and optimized, and the approximate value range is given. The new trough concentrator can utilize the multi-surface combination to achieve the reflection and focusing on the sunlight, and has the function of keeping the shadow surface on the reflecting surface and improving the working performance of the high-temperature solar receiver. Experiments show that the device operating at low temperature efficiency of 45% or more. In the high temperature (≥80 ℃), the efficiency is significantly higher than the all-glass vacuum tube collector or flat-type collector, so it is more advantageous in the high temperature operation.