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目前,聚光式太阳能集热器性能试验均采用平板式集热器热性能测试方法,所得到的效率特性综合反映了聚光器和吸热器二部分特性的最终结果,以致不能将聚光器效率和吸热器效率从总效率中分离出来。直接测量聚光器焦区的辐射强度,不仅可以获得焦区辐射强度分布特性曲线、焦区形状和面积,以及聚光器效率等参数,而且还可以指导吸热器的设计。测量焦区辐射强度分布的仪器有以下要求:(1)测量范围尽可能大,最好能达到100卡/厘米~2·秒(相当于聚光器的能量聚光比在4000以上);(2)测量与光谱性质无关;(3)产生的信号无需
At present, the performance test of the concentrating solar collector adopts the thermal performance test method of the flat-plate collector, and the obtained efficiency characteristic comprehensively reflects the final result of the characteristics of the two parts of the concentrator and the heat absorber, so that the condensing The efficiency of the absorber and the efficiency of the absorber are separated from the total efficiency. Directly measuring the radiation intensity of the condenser focal zone can not only obtain the radiation intensity distribution curve of the focal zone, the shape and area of the focal zone, the efficiency of the condenser and other parameters, but also can guide the design of the heat absorber. The instrument for measuring the distribution of the focal radiation intensity has the following requirements: (1) The measuring range is as large as possible, ideally up to 100 cal / cm ~ 2 sec. (Equivalent to concentrator energy concentrating above 4000); 2) The measurement has nothing to do with the nature of the spectrum; (3) The signal generated is not required