ABSTRACT
Solar energy is received from sun can be converted into useful energy in the form of heat energy. One of the most efficient method water is heated using solar flat plate collector. This heated water can be used for domestic as well as industrial applications. The efficiency of collector depends with many parameters such as area of the collector, number of glass cover, wind velocity and overall top heat loss coefficient. To reduce top loss heat transfer coefficient and improve heat transfer the conventional solar flat plate collector has modified with double glazing arrangements. The modified solar collector has installed at a latitude angle of 12 degree facing towards north-south directions. The experiments were carried out in thermosyphon principle from 10:00 to 16:00 hrs. The results show that over all top loss heat transfer coefficient has marginally reduced and collector efficiency 68% obtained. The flow pattern also studied using CFD analysis
