DESIGN AND FABRICATION OF A SOLAR WATER HEATING SYSTEM FOR USE IN RURAL AREAS

ABSTRACT

 

Solar water heating is a form of renewable energy which involves the use of sunlight to heat water. In this project, the researchers design and fabricate a passive solar water heater for use in rural areas. Their main objective was to design a cheap solar water heater using locally available materials. The researchers used copper coils in the collector and sisal as the insulating material for both the tank and collector. Water flows in the system through thermosiphon. After fabrication, the researchers carried out various tests among them the insulation test for sisal and the collector­’s heating capacity. The temperatures of water heated were recorded over a period of three hours for both the collector and tank. The highest temperature recorded for the collector water was 59º C and that for the tank water was 37 ºC. For the insulation test a thickness of 50 mm was used and water cooled from 74º C to 62.5 ºC in three hours.