Abstract

The main objective of this paper is to cool a definite amount of water pumped from underground to a definite temperature throughout the day in Guwahati city, Assam,India. 5 kg/s of water present at a depth of 10m, 18 oC is pumped to earth’s surface by centrifugal pump and passed through evaporator of vapour compression refrigeration system with R-134a as refrigerant to obtain water of 4oC. The study is made for January having lowest temperature, lowest solar radiation and May having highest temperature, highest solar radiation because if the system performs well in lowest and highest conditions, it will perform well throughout the year. Evaporator temperature for both January and May is maintained at 8oC, condenser temperature at 22o C, 30oC in January and May respectively. The power requirement for centrifugal pump and compression refrigeration’s compressor are supplied by 315 SW280 photovoltaic modules combined in parallel and 2 SW280 photovoltaic modules combined in series with 4117.015 Ah capacity battery as backup during non sunshine hours and night time.