中文摘要：

提出基于线性菲涅尔反射镜的二次反射塔式太阳集热器的设计原理，设计一个由3组定日镜组成的小型塔式集热器，分析塔式集热器的光学性能，当光线垂直入射时，其光学效率可达65％。搭建基于线性菲涅尔反射镜的二次反射塔式集热系统实验台。测试结果表明，入口温度110℃时，热效率为51．6％；工质进口温度110℃时，热损失系数为38．6W／（m2·℃），热损失为583．4w。

英文摘要：

The design principle of secondary reflection tower solar collector based on linear Fresnel reflector was proposed and a tower collector prototype including three heliostats was designed. The optical performance of the prototype was studied. It is found that the optical efficiency can reach up to 65% with light of normal incidence. A secondary reflection tower collector system based on linear Fresnel reflector was built. The Experimental results showed that the thermal efficiency is 51.6% at inlet temperature of 110 ℃. The heat loss coefficient and heat loss are 38.6 W/（m2 ·℃ ） and 583.4 W at 110 ℃, respectively.