Modeling of Solar Photovoltaic System Assisted Water Cooling System

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°C is pumped to earth’s surface by centrifugal pump and passed through the evaporator of a vapor compression refrigeration system with R-134a as refrigerant to obtain water of 4°C. The study is made for January having the lowest temperature and lowest solar radiation, and May having the highest temperature and highest solar radiation, because if the system performs well in the lowest and highest conditions, it will perform well throughout the year. Evaporator temperature for both January and May is maintained at 8°C, condenser temperature at 22°C, 30°C in January and May respectively. The power requirement for the 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 a 4117.015 Ah capacity battery as backup during non-sunshine hours and nighttime.