Numerical Study of the Efficiency of Flat Plate Solar Collectors in Different External Conditions

In this paper is presented a numerical investigation of efficiency of the solar thermal panels for different external conditions. The aim of the study was the analysis of flat plate solar panels that are placed in a temperate zone, such as the climate of Romania. The opportunity of the study is proven by the growing tendency in using renewable source of energy and especially of the solar thermal one. The variables considered in the study were the inlet flow rate, external temperature, air velocity and intensity of solar radiation.