Experimentally Study the Effects of Fins Height and Width HW Ratio to the Fin Thermal Performance by Natural Convections

The industry revolution in thermal engineering started with fixed the extended surface area named a fin. Therefore, a lot off research work done in this field to enhance the performance of heat transfer . All, previous work reach to that any increase of heat transfer coefficient and the fin surface area will increase the heat transfer rate by natural convection. The research work summarized in this paper presents an experimental investigation on the effect of fin heights ?width (H/w) ratios on the fin performance using rectangular plate type fins. The steady-state natural convection heat transfer from vertical rectangular fins extending perpendicularly from horizontal square aluminum base was investigated experimentally at high range of temperatures from 60 to 110 oC. Four fin heights 30mm,40mm,50mm,60mm were employed under free convection heat transfer conditions. The heat transfer area was kept the same. The performance of the fin expressed in terms of fin efficiency, overall fin efficiency, fin effectiveness and thermal resistance as a function of fin height parameters has been study at fin height and width (Hw) ratios 0.2,0.35,0.55 and 0.8 respectively in this work. The dimensionless parameter Biot no. for different fin heightwidth (Hw) ratios to the fin heat transfer rate.Results show that’s fin heat transfer performance increase with decreasing the fin heights and increasing the fin width for the range of temperatures used.