Effect of Inclination Angle & Water  Temperature on Internal Heat Transfer  Coefficients & Productivity of Single Slope  Solar Still: An Indoor Simulation

Nikhil Singh; Abishek Gaikwad; Ajeet Kumar Rai

Volume : II, Issue : VII, July - 2013

Effect of Inclination Angle & Water Temperature on Internal Heat Transfer Coefficients & Productivity of Single Slope Solar Still: An Indoor Simulation

Nikhil Singh, Abishek Gaikwad, Ajeet Kumar Rai

Abstract :

In this communication, an effort has been made to investigate the effect of condensing cover inclination angle and water temperature on internal heat transfer coefficients and yield of single slope solar stills inclined at 150 , 300 & 450 . For the purpose of accurate analysis inner glass cover temperature has been used instead of outer cover temperature. The construction of condensing cover consists of commonly used glass sheet to form top inclined cover and GRP sheets to make the side walls of the cover. Constant temperature water bath has been used for the experiment to maintain water temperatures ranging from 40o C to 70o C at steady state. The yield obtained at an interval of every 30 minutes has been used to determine the values of constants C and n and consequently convective & evaporative heat transfer coefficients. The maximum value of heat transfer coefficients is for condensing cover with inclination angle of 150 and the minimum is for 300. The maximum temperature difference between evaporative surface and condensing surface is for condensing cover with inclination angle of 450 and the minimum is for 150 . The maximum yield is obtained for condensing cover with inclination angle of 450. .