三种低倍聚光比的CPC的实验对比研究  

EXPERIMENTAL COMPARISON OF COMPOUND PARABOLIC CONCENTRATOR WITH THREE LOW CONCENTRATION RATIO

作　　者：杨明[1] 裴刚[1] 李桂强[1] 王健[1] 季杰[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027

出　　处：《太阳能学报》2017年第2期431-437,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51178442;51476159;51408578);中央高校基本科研业务费专项资金

摘　　要：设计和制作3种不同聚光比的非跟踪复合抛物面聚光器(CPC),并基于光学软件模拟3种CPC的光学效率。搭建开口面积均为1.05 m^2聚光比分别为1.50、2.00和3.00的真空管CPC实验系统。测试进口温度分别为14、30、50、70和90℃时3组CPC的集热效率,拟合得出1.50×CPC、2.00×CPC和3.00×CPC的截距效率(光学效率)分别为0.699、0.682和0.660,热损系数分别为1.42、1.09和0.69。结果显示在较低集热温度下,1.50×CPC具有更高的热效率;在较高集热温度下,因低倍CPC热损的增加,3.00×CPC具有更高的热效率。Three non-tracking compound parabolic concentrator （CPC）collectors with different concentration ratio were designed and manufactured, and their optical performances were simulated using the optical software. Three evacuated tube CPC collectors with aperture area of 1.05 m^2 and with concentration ratio of 1.50, 2.00 and 3.00 were built, respectively. And the thermal efficiencies of three CPC collectors was tested at inlet temperature of 14, 30, 50, 70 and 90℃. The fitting intercept efficiencies （optical efficiencies） of 1.50 × CPC, 2.00 × CPC and 3.00 × CPC were 0.699, 0.682 and 0.660, respectively. The heat loss coefficients were 1.42, 1.09 and 0.69, respectively. The results show that 1.50 × CPC has higher thermal efficiency at lower collecting temperature while 3.00 × CPC has higher thermal efficiency at higher collecting temperature due to increase of heat loss of low magnification CPC.

关 键 词：CPC 聚光比 真空管 集热效率 

分 类 号：TK511.2[动力工程及工程热物理—热能工程]