Enhancement of Heat Transfer in Solar Air Heater

An investigation is done in relation to heat transfer enhancement in solar air heaters with circular V-shaped down ribs. Ribs were attached to the absorber plate, having an angle of attack ( = 60 ). The ratio of rib height to hydraulic diameter (e/D) was 0.047, while the range of rib pitch-to-height ratio was (P/e = 4, 8, and 16) mm for three different sheets, with the Reynolds number ranging from (Re = 1825-7759). The roughened wall of the duct is heated by direct sunlight, while the remaining three walls are insulated. The concept of a V-shaped rib was developed to capitalise on this span-wise variation of heat transfer for inclined ribs. The V-shaped rib reduced the span-wise variation of heat transfer and increased average heat transfer.

Autorentext

The author is working as a professor and Principal, CT Institute of Engineering Management and Technology, Shahpur, Jalandhar, Punjab, India. Author has more than 24 years of teaching and research experience, authored many research papers and articles in international journals.