微通道太阳能平板集热器的集热性能试验  

Experiment on Heat Collecting Performance of Mini-Channel Flat-Plate Solar Collector

作　　者：常晓琪 杜震宇[1] CHANG Xiaoqi;DU Zhenyu(College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学环境科学与工程学院

出　　处：《华侨大学学报（自然科学版）》2019年第5期653-660,共8页Journal of Huaqiao University(Natural Science)

基　　金：国家重点研发计划中欧政府间国际合作项目科技创新合作重点专项(2016YFE0133300-04);山西省重点研发计划重点项目(201603D111018)

摘　　要：为进一步提高传统太阳能平板集热器的集热性能,对一种自主设计的新型微通道太阳能平板集热器进行探究.通过采用矩形微通道吸热板结构,减小传统流道的截面面积及增加吸热板与循环工质的热传导面积,使流体吸收热能的时间延长,并提高总的传热量.同时,对该集热器在山西省某农村住宅供暖系统进行试验测试.试验结果表明:在冬季晴朗天气的典型工况下,微通道太阳能平板集热器日平均集热效率为63.6%,最高集热效率可达80.4%,系统平均能效比为16.1,单块集热板平均热损失为233.3 W,且集中在顶部;下进上出流动形式的瞬时效率较高,热损失较小.In order to further improve the heat collecting performance of traditional solar panel collector, a new type of self-designed mini-channel flat-plate solar collector is studied in this paper. By adopting rectangular mini-channel heat absorption plate, reducing the cross section area of traditional runner and increasing the heat conduction area of heat absorption plate and fluid, the time for the fluid to absorb heat energy is increased, and the total heat transfer is improved. At the same time, this collector is tested in a rural residential heating system in Shanxi Province. The results show that under the typical conditions of fine weather in winter, the average daily heat collecting efficiency of the mini-channel flat-plate solar collector is 63.6%, and the highest is 80.4%. The average coefficient of performance of the system is 16.1 and the average heat loss of a single collector plate is 233.3 W, mainly concentrated at the top. It can be concluded that the instantaneous efficiency of the flow coming from blow is higher and the heat loss is smaller.

关 键 词：太阳能平板集热器 微通道 集热效率 热损失 能效比 

分 类 号：TK511.2[动力工程及工程热物理—热能工程]