Permiso obtenido por la institución para subir este documentoThe photovoltaic cells (PV) are commonly used as global radiation measurement device, even though
when it has been proved that there are significant differences with respect to using pyranometers. The dirt deposited
on the surface of the PV is one of the most influential factors in the measurement of the solar radiation. In this work
we have made experimental measurements with four identical cells, two cleans and two dirties with different soil
density (0.2 g/m2, 0.4 g/m2, 0.8 g/m2, 1.2 g/m2 and 1.5 g/m2) and different size particles (< 125 μm) comparing the
results and obtaining a correlation between the density of the dust and the difference between the measured irradiance
for clean and dirty cells for each particle size