• M Charishma Brunda
• P.s.Kishore

Fossil fuels have become the part and parcel of our lives, which are the major source of energy. Among the different renewable energy resources, solar energy is the most important due to its quantitative abundance. One of the applications of solar energy to convert it into thermal energy is Solar air heater. Solar air heater is simple, cheap and most widely used collection devices of solar energy. A simple solar air heater has a low thermal performance as it has lower heat transfer coefficient between absorber plate and the carrier fluid(air). So, extended surface is attached to the absorber plate to overcome the lower thermal performance. Our aim of is to improve the efficiency of a solar flat plate collector by using wavy fins attached to the absorber plate. It mainly focuses on the heat augmentation and increase in efficiency with fins. In order to increase the heat transfer rate and efficiency, wavy fins are used. By varying air mass flow rates from 250 kg/hr to 350 kg/hr it is found that effective heat transfer coefficient is maximum for highest for 350 kg/hr . In addition the friction factors are lowest and pressure drops are highest with largest Reynolds number. The thermal performance of conventional Solar Air Heater and wavy fin Solar Air Heater are done analytically and the results were compared and the best configuration of Solar Air Heater is suggested for drying applications.

Solar Air Heater,Wavy fins,mass flow rate,Efficiency,Pressure drop

"Heat transfer enhancement of wavy finned solar air heater", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.904-911, June 2019, Available :http://www.jetir.org/papers/JETIR1907Q35.pdf

"Heat transfer enhancement of wavy finned solar air heater", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp904-911, June 2019, Available at : http://www.jetir.org/papers/JETIR1907Q35.pdf