Augmentation on Heat Transfer and Friction Factor in Three Sides Solar Air Heaters Having an Arrangement of Multi-V and Transverse Wire Roughness on the Absorber Plate

This paper present the experimental inquiry on heat transfer and friction features enrichment adopting new-fangled of three side’s synthetically rugged rectangular duct solar air heaters (SAHs). The roughened SAH ducts has been an arrangement multi-v transverse wire (top wall two side walls transverse) covered with glass sides. It various appliances such as crop drying, seasoning timber, space heating, industrial purpose, etc. used a width to height ratio, W/H, equal 8, relative raggedness pitch, P/e, wide-ranging from 10 - 25, height, e/D, varied 0.018 – 0.042 flow Reynolds number, Re, occupied 3500 12,000 for fixed values width, W/w, 6 angle attack,