Optimization of PVT geometry in application of ground heat source regeneration

Abstract

A photovoltaic thermal solar collectors (PVT) and heat pump combined system consists of numerous elements. In this context it is important to properly model respective elements. To the best of our knowledge there is no relative research that has optimized PVT geometry to maximize heat generation for the ground regeneration. Therefore, the authors decided to investigate the influence of bottom insulation and air gap thickness on heat generation in case of glazed and unglazed PVT. The results show that the optimum construction of the PVT should be based on the unglazed technology of solar collector and on minimum insulation thickness. Obviously, the thickness of insulation needs to be optimized to the specific conditions like for instance type and depth of borehole heat exchangers or parameters of the heat pump.