冲缝吸热板渗透型太阳能空气集热器性能研究

介绍了冲缝吸热板渗透型太阳能空气集热器的结构,建立了传热数学模型。采用Matlab程序对传热数学模型进行求解,模拟研究了结构参数、运行参数对集热器热性能的影响。集热器出口空气温度的实测结果与模拟结果的平均偏差为0.99K,证明传热数学模型准确可靠。集热量随吸热板外表面发射率增大而降低,随集热器出口空气流量、太阳辐射强度的增大而升高,随环境温度的增大先降低后升高。集热器出口空气温度随吸热板外表面发射率、集热器出口空气流量的增大而降低,随太阳辐射强度、环境温度的增大而升高。

Study on Performance of Unglazed Transpired Solar Air Collector with Slit-like Perforation Absorber

The structure of an unglazed solar air collector with slit-like perforation absorber is in- troduced, and its heat transfer mathematical model is built. The mathematical model is solved by Matlab program, and the influence of the structural parameters and operational parameters on the collector per- formance is simulated. The mean deviation between the simulated and measured values of the outlet air temperature is O. 99 K, which shows that the model is accurate. The collected heat decreases with in- creasing of the absorber surface emissivity, it increases with increasing of the outlet air flow and solar ra- diation intensity, and it first decreases and then increases with the ambient temperature rise. The outlet air temperature decreases with increasing of the absorber surface emissivity and the outlet air flow, and it increases with increasing of solar radiation intensity and ambient temperature.