1Research Scholar, Kadi Sarva Vishwavidyalaya University, Gandhinagar, Gujarat
2Member of Institution of Engineers (MIE)
3Assistant Professor, Department of Mechanical Engineering, Sankarsinh Vaghela Bapu Institute of Technology, Gandhinagar
4Assistant Professor, Department of Mechanical Engineering, M L Institute of Diploma Studies, Bhandu, Mehsana
*Email: Engineerhitesh2000@gmail.com
Water has always been a source of energy for man. We use solar energy to change salty or brackish water into drinkable water by soar distillation. Natural fresh water resources are being depleted rapidly, as a result of population growth and socioeconomical development. The increasing demand for water puts enormous strain on the underground aquifer, which results in lower water level and increasing salt content. In this communication, an attempt has made to find the effect of cow dung cakes properly arranged on the surface of absorber in single slope single basin solar still during summer climate conditions of month July, 2010. To know quick distillate output difference, experiment has done by use of two identical solar still, one by use of cow dung cakes on simple absorber plate and other steel absorber plate. Facing of solar stills were 30 degree inclination of condensing cover (inner side glass cover) and constant depth of water 0.03 m. The objective of this paper is to know variation in internal heat transfer coefficients like evaporative heat transfer coefficient, convective heat transfer coefficient and radiative heat transfer coefficient as well as output of solar still. Experiments says that, evaporative heat transfer coefficient is higher in case of solar still consisting of cow dung cakes inside the solar still, compare with other heat transfer coefficient and it is also observed that distillate output is higher about 25% more of solar still having cow dung cakes
cow dung cakes, solar still, Thermocouple, heat transfer Coefficient
