Energy Performance of a Cogenerative Photovoltaic System for the Production of Electrical Energy and the Air-Conditioning of an Open-Space Building

A more accurate calculation methodology is proposed of the total solar energy transmittance g ofglazed surfaces based upon the determination of solar factors in visible, infrared and ultravioletbands. The method uses measured values of solar radiation and spectral optical properties of glazedsurfaces calculated with the WIS code. This code implements the calculation procedure of opticalparameters of EN 410 Specification, which uses a standard spectral distribution of global solarradiation. The investigation, referring to glazed surfaces with different optical properties, permitsthe highlighting of solar factor variability in the entire solar band and in the three bands which arecharacteristic of the spectrum, varying recorded solar energy, and the limits of the Standardprocedure which assigns constant values to such coefficients. The results obtained are interesting,above all for the characterisation of glass with different optical properties in infrared and visiblebands.