Cfd Investigation of Heat Transfer Characteristics of Solar Air Heater with Benzene Shaped Roughness

Abstract

In this paper study of benzene shape solar air heater in rectangular solar system is consists of absorber plate. Geometry for the benzene shaped rectangular channel has completed collection of the parameters. The rate of heat transfer is maintained by values of benzene shaped roughness in different positions of gaps between the arm of benzene shape roughness (g = 2, 3.8, and 5.6) and constant gap between each benzene G = 45 mm, and relative gap position G/e = 10.7 where e = 4.2 mm is height of benzene type roughness. These are the parameters of roughness which worked on hydraulic diameter of rectangular (Dh = 46.15 mm) under Reynolds number in range of 4000, 7000, 10000, 13000, 16000, 19000, and 22000 and The maximum efficiency of solar model ?_max = 1.515072 examined for g = 3.8 mm, P/e = 14, P = 58.8 mm and Re = 22,000.