EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL

Experiments were carried out on tubular solar still in Allahabad climate conditions. Energy storage medium is used in still to produce distillate in the off sunshine hours .A correlation is developed for the productivity of a still using experimental results .The proposed correlation has been validated with the experimental results .The regression coefficient approaches to unity and the correlation may be perfect positive with least error .Energy and exergy efficiency of a system were calculated .It is observed that productivity of solar still increase by 20% when energy storage medium is used .