Published Paper Details:

Solar heating devices with increased yields of hot water are mandatory so as to match the demand and supply of hot water. The thermal investigations on these solar heating devices are also mandatory so as to efficiently operate these solar thermal devices in the application sectors. In the present investigation, the solar heating systems with toughened glass cover, nano carbon-ferric oxide coated absorber, rock wool insulator and internal reflectors of different reflecting shapes were tested. The experimental results showed that the temperature elevation of working fluid ranged between 16.9 and 28.4 0C with the corresponding thermal performance variation of 28 to 41% in the flat reflector based heating device. The experimental results also showed that the temperature elevation of working fluid varied from 27.0 to 30.4 0C with the corresponding thermal performance variation of 26 to 42% in the V-corrugated reflector coupled heating device. The experimental results also revealed that the minimum temperature elevation was 21.80C and the maximum temperature elevation of working fluid was 30.00C with the thermal efficiency variation of 33 to 43% in the U shaped reflector integrated heating device. As the nano structured absorber and U-shaped reflector integrated heating device had the highest efficiency, it could be concluded that the solar heating devices with nano structured absorber and U-shaped reflectors would be effectively used in the application sectors.