Analyses of innovative glass blocks for BIPV: assessment of thermal and optical performance

Abstract

This paper illustrates the results of the performance analyses conducted on an innovative glass block integrated with thirdgeneration dye-sensitised solar cells (DSCs), designed to enable the construction of translucent and sustainable building envelopes. The analyses include the simulation of both thermal and optical performance with regard to different configurations of the photovoltaic (PV)-integrated glass block, and the results obtained are presented using two different programs: Comsol Multiphysics and WINDOW. The configurations may differ – for example, because of the position of the module inside the glass block, the type of DSC module used (composition, transparency, design) and the features of the glass block itself. Different combinations in terms of thermal insulation, light transmission and estimated PV production are discussed. The position of the DSC module within the glass block has a significant impact on the thermal and electrical performance of the product, but not on its optical behaviour, which instead depends on the type of module used. The aim of the study is to define some optimum combinations according to the different needs of active building facades and requirements related to diversified climate contexts.