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GREEN HOUSE SAVING POTENTIAL OF A PHOTOVOLTAIC THERMAL HYBRID SOLAR SYSTEM FOR RESIDENTIAL APPLICATIONS

Rekha L, Dr. Vijayalakshmi M M, Dr. Natarajan E

Global warming is a problem in which the combustion of coal, oil and other fossil fuels causes the atmospheric concentrations of GHGs such as carbon dioxide to increase. Solar energy is one of the most promising renewable sources of energy for present needs. Solar Photovoltaic Thermal (PVT) system is a hybrid system to produce both thermal and electrical energy. This paper presents the CO2 savings potential of a hybrid system of 4 m2 PV module area to produce about 3 kWh per day electrical energy and a flat plate solar collector of 2 m2 area to deliver about 100 LPD of hot water at about 80oC. In this paper the yearly CO2 saving potential of different systems used for residential applications are calculated and analysed. The CO2 annual saving potential is found to vary from 0.4 to 2.7 ton.