Review based on the absorber plate coating for solar air heater applications

Abstract

The critical review presents the development of the solar selective coating on the absorber plate used for solar air heater. Absorber plate coatings directly convert the solar energy into heat. Different type of solar selective coating is therefore developed with high solar absorptance (α) and low emittance (ε).A critical investigation is done on the absorber plate metal multi-layers and nanomaterial based coating and resulting performance enhancement. This review reports the similarities in the result through in depth discussion on different type of parameters which can affect the solar air heater performance. Analysis was performed and reviewed here to rationalize and eventually explain the complex behaviors of spectrally selective coating. Based on a systematic review by many researches of published works, coating improves the heat absorbing characteristics for the absorber of SAH.