Life-cycle energy analysis of building integrated photovoltaic systems (BiPVs) with heat recovery unit
Crawford, R.H., Treloar, Graham J., Fuller, Robert and Bazilian, M. 2006, Life-cycle energy analysis of building integrated photovoltaic systems (BiPVs) with heat recovery unit, Renewable and sustainable energy reviews, vol. 10, no. 6, pp. 559-575.
Building integrated photovoltaic (BiPV) systems generate electricity, but also heat, which is typically wasted and also reduces the efficiency of generation. A heat recovery unit can be combined with a BiPV system to take advantage of this waste heat, thus providing cogeneration. Two different photovoltaic (PV) cell types were combined with a heat recovery unit and analysed in terms of their life-cycle energy consumption to determine the energy payback period. A net energy analysis of these PV systems has previously been performed, but recent improvements in the data used for this study allow for a more comprehensive assessment of the combined energy used throughout the entire life-cycle of these systems to be performed. Energy payback periods between 4 and 16.5 years were found, depending on the BiPV system. The energy embodied in PV systems is significant, emphasised here due to the innovative use of national average input–output (I–O) data to fill gaps in traditional life-cycle inventories, i.e. hybrid analysis. These findings provide an insight into the net energy savings that are possible with a well-designed and managed BiPV system.
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Field of Research
129999 Built Environment and Design not elsewhere classified
Socio Economic Objective
970112 Expanding Knowledge in Built Environment and Design
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