THERMAL INVESTIGATION OF A TUBULAR SOLAR STILL

In the present work performance of a Tubular Solar Still is tested in active and passive mode. A 4W fan is used inside the still to enhance the evaporation and condensation rate in the active mode. The experiments were conducted in the month of October (winter season) in Indian climatic conditions in the Solar Energy Laboratory of SHUATS, Allahabad, (U.P.) India. Exergy destruction in the basin water is calculated and it is found more in passive system than in the active system. Results show that exergy efficiency of tubular solar still with fan is 133% higher than the tubular solar still in passive mode.