BIPV热通道实验研究与分析

Experimental Research and Analysis of Heat Channel in Building Integrated Photovoltaic( BIPV)

为了研究光伏热通道的传热特性,对光伏建筑一体化建筑(BIPV)进行了实验研究。测试包括了通道内空气温度、速度、太阳辐射强度以及环境温度等。通过研究通道内温度场、光伏背板温度以及外墙温度随室外环境参数的变化,分析了热通道的传热特性,结果分析为通道的动态启闭提供了实验数据的支持。对热压的计算表明上午的通风效果较好,换热系数较大。比较阴天与晴天的热工性能,看出阴天通道通风效果差,热量不能及时排除,并发现太阳辐射对幕墙性能有较大影响。

To figure out heat -transfer characteristic in the heat channel, experimental research on ther- modynamic parameter of BIPV channel was carried out. Air temperature, velocity in channel, solar radi- ation and ambient temperature were tested. Through study on temperature field of air in heat channel, PV backplane and exterior wall, heat transfer process in heat channel were analyzed. It would provide experi- mental data support for determining the time to close heat channel. Calculation of hot - press indicated that natural ventilation in morning was more intense and heat -transfer coefficient was bigger. The com- parison of thermal performance between sunny day and cloudy day indicated that natural ventilation in cloudy day was not very well, so the heat could not be removed in time. It was concluded that solar radia- tion was important for performance of heat channel.