【摘要】 本文对文献中报道的四种复合抛物面聚光器截短后的材料消耗和聚光比变化进行了分析比较。更多还原

【Abstract】 In Ref.1 there is an analysis of common type of CPC when it is truncated.The results are expressed by the relation between the ratio of total profile length to the aperture and the concentration ratio.However,there is not any analysis of other types of CPC.In this paper we present the analysis of other three types of CPC,and similar results are obtained.Comparisons between these four types of CPC are made.The main conclusions of this paper are listed as follows:(1)High concentration ratios can be obtained only when the collection angle is rather small.(2)When the collection angle is small,there are two regions of the above mentioned relation.The truncation has to be made in the transition area of these two regions,so the material can be saved and the concentration ratio is not strongl decreased.(3)The 3rd type of CPC ir better than other types for the flat receiver.(4)For the circular receiver the profile expressed in Ref.1 is much better than that cited in Ref.3.更多还原