Experimental Approach of Photovoltaic System in Operation for Performance Prediction of Natural Convection

Abstract

The climatic variables and the geometric characteristics influence in the energy balance of photovoltaic systems. The form as that system change of heat with the environment causes impact in efficiency of the generation of energy. The energy balance is defined by the incident irradiation in the photovoltaics modules and the forms that system converts that energy as irradiation, convection, conduction and generation of a potential difference. To predict the behavior of photovoltaics module can be use the classical problem of flat inclined plates. The existing correlations using dimensionless numbers, develop in experimental studies and numerical simulation, have limitations in their use and in many cases do not provide approximate results of photovoltaic system in operation. The aim of this work is analyzed what is the capacity of an experimental approach in predict the thermal behavior of an installed system in UniCEUB university in Brasília. The experimental data get a suitable correlation more than 0,9 with the installed system, suggesting its capacity of forecast of the phenomenon.