摘要
提出采用椭球面冲孔吸热板的渗透型空气集热器,模拟分析进风量、太阳辐照度、进口空气温度、环境温度、冲孔尺寸对空气集热器出口空气温升、集热效率的影响。冲孔尺寸一定时,在进风量、太阳辐照度、进口空气温度、环境温度变化范围内,集热效率均可达到50%以上。进风量、太阳辐照度、进口空气温度、环境温度、冲孔进口半径一定时,存在最佳冲孔出口半径,使出口空气温升、集热效率达到最大。较小的冲孔进口半径可获得较高出口空气温升、集热效率,但也增大了空气阻力,提高了加工难度,因此应选取适当的冲孔进口半径。
A transpired air collector with ellipsoidal perforated heat absorbing plate is proposed.The effects of inlet air volume,solar irradiance,inlet air temperature,ambient temperature and perforating size on outlet air temperature rise and heat collection efficiency of the air collector are simulated and analyzed.When the perforating size is fixed,the heat collection efficiency can reach more than 50%within the range of inlet air volume,solar irradiance,inlet air temperature and ambient temperature.When the air inlet volume,solar irradiance,inlet air temperature,ambient temperature and perforating inlet radius are fixed,there is an optimal perforating outlet radius,which maximizes the temperature rise and heat collection efficiency of the outlet air.The smaller perforating inlet radius can obtain higher outlet air temperature rise and heat collection efficiency,but it also increases the air resistance and increases the processing difficulty.Therefore,the appropriate perforating inlet radius should be selected.
作者
侯瑞星
李宪莉
王昌凤
姚万祥
HOU Ruixing;LI Xianli;WANG Changfeng;YAO Wanxiang
出处
《煤气与热力》
2023年第4期38-42,共5页
Gas & Heat
基金
国家自然科学基金:“基于雾霾散射-削弱效应的太阳辐射对建筑得热及能耗的影响机理研究”(51508372)
“基于多场协同和火积耗散极值原理的盖板式渗透型集热器优化传热机理研究”(51506141)。
关键词
太阳能空气集热器
椭球面冲孔吸热板
集热效率
冲孔尺寸
solar air collector
ellipsoidal perforated heat absorbing plate
heat collection efficiency
perforating size
