Abstract
Jet impingement has been verified as an effective method to enhance convective heat transfer. To make better use of this effect, vacuum glazed transpired solar collector with slit-like perforations is developed. In this paper, a mathematical model based on energy balance equations for the solar collector has been developed to predict its thermal performance. Then experiments have been carried out to verify the model. The results of experiment and simulation have achieved good agreement with the same trend and average deviation of 2.25%. It shows that the model is correct and accurate enough to predict the thermal performance of the collector. Based on simulation results of the model, the effects of key parameters on the thermal performance are analyzed. The key parameters include equivalent diameter of perforation, pitch of perforations, collector height, emissivity of the absorber plate and vacuum glass cover, transmittance of vacuum glass cover. The results of the model are useful in designing and optimizing the vacuum glazed transpired solar collector for different applications.
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