Roadmap for the next-generation of hybrid photovoltaic-thermal solarenergy collectors
Alonso Alvarez, D.
Ferre Llin, L.
Murrell, A. J.
Paul, D. J.
Markides, C. N.
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For hybrid photovoltaic-thermal collectors to become competitive with other types of solar energy converters, they must oﬀer high performance at ﬂuid outlet temperatures above 60°C, as is required for space heating and domestichot waterprovision, whichtogether accountfornearly50%ofheatdemand.Aroadmap ispresentedof the technological advances required to achieve this goal. Strategies for reducing convective, radiative and electrical losses at elevated temperature are discussed, and an experimental characterisation of a novel transparent low-emissivity coating for photovoltaic solar cells is presented. An experimentally-validated simulation formalism is used to project the performance of diﬀerent combinations of loss-reduction strategies implemented together. Finally, a techno-economic analysis is performed to predict the price points at which the hybrid technologies along the roadmap become competitive with non-hybrid photovoltaic and solar thermal technologies. Themostadvanced hybridtechnology alongthe roadmapemploysanevacuated cavity,a transparent lowemissivity coating, and silicon heterojunction photovoltaic cells.
Is part ofSolar Energy, 2018, vol. 174, p. 386-398
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