摘要
研究两种采用冲缝吸热板的渗透式太阳能空气集热器,对Ⅱ型集热器建立传热数学模型,模拟结果与实测结果吻合较好,验证数学模型可以作为理论研究的基础。分别模拟研究结构参数、运行参数对两种集热器热性能的影响。当集热器空腔内空气来源于室外环境时,两种集热器的集热效率均随太阳辐射照度的增大而增加,均随室外风速和环境温度的增大而减小;Ⅰ型集热器的集热效率随太阳辐射照度、室外风速和环境温度的变化率高于Ⅱ型集热器;当玻璃盖板透过率大于0.69时,Π型集热器的集热效率高于Ⅰ型集热器。
Two new transpired solar air collectors with perforated absorber plate are researched, and their mathematical models of heat transfer are built. The simulation results coincide well with the experimental results. The verification of the mathematical models can be used as the basis of theoretical research. The effects of structural and running parameters on the thermal performance of the collectors were simulated respectively. When the air in the collector plenum comes from the outdoor environment, the heat collection efficiency of two collectors increased with value of solar intensity and decreased with values of outdoor air velocity and ambient temperature. The change rates of heat collection efficiency of type Ⅰ collector with values of solar intensity, outdoor velocity and ambient temperature were larger than those of type Ⅱ collector. When the transmittance of glass cover is greater than 0. 69,the heat collection efficiency of type Ⅱ collector is higher than that of type Ⅰ collector.
出处
《煤气与热力》
2015年第9期5-9,共5页
Gas & Heat
基金
建筑安全与环境国家重点实验室开放课题基金资助(BSBE2014-07)
国家自然科学基金青年项目(51506141)
天津市高等学校科技发展基金计划项目(20140424)
关键词
渗透式太阳能空气集热器
集热效率
玻璃盖板透过率
冲缝
transpired solar air collector
heatcollection efficiency
transmittance of glass cover
perforation
