Abstract
SYNOPSIS In this paper, the energy payback time (EPBT), energy yield factor (EYF), energy yield (EY) and CO2 emissions of a Photovoltaic Thermal (PV/T) water collector have been analysed. The embodied energy to produce the PV/T module has been computed based on single crystal silicon. The energy payback time with and without balance-of-system (BOS) for open-field and rooftop has been evaluated for different climatic zones in India for an optimum inclined PV/T system. It is observed that the EPBT of the PV/T system is reduced due to the additional thermal energy available. The embodied energy at micro-level is significantly higher than that at macro-level. The effect of insolation, overall efficiency, lifetime of the PV system on the energy payback time (EPBT) and CO2 emissions have been studied with and without BOS (open-field and roof-top) and evaluated at macro and micro-level. The potential for mitigation of CO2 emissions and thus the importance of PV/T systems for sustainable development is highlighted.
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