Characteristics Study of Photovoltaic Thermal System with Emphasis on Energy EfficiencyChuah Yee Yong, Mohammad Taghi Hajibeigy, Chockalingam Aravind Vaithilingam and Rashmi Gangasa WalvekarMATEC Web Conf., 152 (2018) 01003DOI: https://doi.org/10.1051/matecconf/201815201003