Perdas de potência em sistemas fotovoltaicos pela elevação da temperatura

Abstract

This work deals with the power losses of photovoltaic systems with the temperature increase of the photovoltaic modules, as well as a proposal of solution to the problem. The proposed system to solve this problem is based on a heat exchanger coupled in a conventional photovoltaic module, through which a fluid will flow through the action of a pump, which will be coupled in a reservoir. The proposed system is very similar to that used in high performance computers, where the fluid exchanges heat with the processor. Some preliminary simulations were made, where there were gains in the average power extracted from the photovoltaic modules. Based on these results a prototype of the cooling system was constructed, which was compared to a conventional module of the same model, where it was verified that power and thermal energy gain occurred in the water used in the cooling. From these results were made some more simulations where the proposed system was more efficient in days with higher solar irradiance and temperature.