Improvements of hybrid PV–T solar energy systems using Amlouk–Boubaker optothermal expansivity optimizing abacus sketch

This study is a prelude to the definition of a new synthetic parameter inserted in a 2D abacus. This parameter: the Amlouk–Boubaker optothermal expansivity , is defined, for a given PV–T material, as a thermal diffusivity-to-optical effective absorptivity ratio. This parameter’s unit evokes a heat flow velocity inside the material. Consequently, the parameter wAB could be combined with the already known bandgap energy Eg, in order to establish a 2D abacus. A sketched scheme of the 2D abacus is proposed as a guide for investigation and evaluation of PV–T candidate materials like metal oxides, amorphous silicon, zinc-doped binary compounds, and hydrogenated amorphous carbon. Using this abacus, designers will be able to compare solar energy-related materials on the basis of conjoint optical and thermal efficiency. 2010 Elsevier Ltd. All rights reserved