中文摘要：

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。

英文摘要：

A new kind multi-surface composite trough solar concentrator is introduced in this paper. The theoretical and experimental researches are carried out and the principles of its work are introduced. Its important design parameters are calculated and optimized and the rough range of values are given. This new trough concentrator can take advantage of combination multi-surface to reflect sunlight on the focus. There is no shadow left on the reflective surface and the operating performance of the high-temperature solar receiver is improved. Experiment results show that the low-temperature operating efficiency of the device is 45% or more. At high temperature （≥80℃）, the efficiency is significantly higher than all-glass vacuum tube solar collector or flat-plate collector, so it is more advantageous to run at high temperatures.