Simulation and model validation of uncovered PVT solar system

Nowadays, several tools are used to estimate the productivity of PVT components, nevertheless none of them takes into account all the factors and the losses that are involved in the energy balance of an hybrid collector system, like spectral efficiency of PV module or radiative heat exchange between PV module and sky. The aim of this work is the construction of a detailed mathematical model for the estimation of electrical and thermal production of a unglazed hybrid component with water as heat transfer fluid. The paper presents a detailed performance prediction model applicable to uncovered PVT collectors and the experimental validation carried out at the Politecnico di Milano on a commercial module.