Comparative Study of Thermal Performance of Spiral Tube Solar Water Heater with Straight Tube Solar Water Heater

The sun which is source of all energy the solar energy which is available from sun can be used for many application water heating, air heating and power generation like solar water heater are the system those collect solar energy and transfer the heat to passing water. The present work includes to carry out comparative study for thermal performance of the straight tube solar water heater with the proposed spiral tube solar heater experimental set up; it consists copper tube in shape of spiral shape, flat plate collector, K type thermocouple the change in water temperature for 100 litter per day water capacity. The thermal performance was evaluated extensively throughout the month of May; a maximum temperature difference of 16 Ö¯C between inlet and outlet of the solar water heater. The efficiency of spiral tube solar water heater was calculated. The maximum value during the experimental period was found to be 47.63% which was more than the straight tube solar water heater.