O PTIMIZATION OF A IR S PACING OF S OLAR F LAT P LATE L IQUID C OLLECTOR WITH TWO S TRUCTURED G LAZING COVERS

Flat Plate Liquid collectors are simplest and most common device used to convert solar energy to Useful heat. It inevitably employ a Transparent cover to trap short wave solar irradiation and Reduce convection and radiation losses as well. Design with more than one cover, further reduce convection and radiation losses. The performance of Flat plate collector is dependent on Heat Losses. Heat Losses vary with Distance between Absorber Plate and Lower Glazing and also with Distance between lower glazing and t op glazing. Thus optimizing these two spacing is an important issue in design of Flat Plate Collectors. A part of solar irradiation falling on Transparent cover is reflected back by both of the surfaces of the cover. Etching process reduces loss due to ref lection. The Present investigation is about optimization of the two Air Spacing parameters in order to Design most efficient Double Glazing Collector with Unstructured covers (Low iron content Glass) and Structured Covers(Low iron content Glass Soft etche d with acid on both side).