Albedo and Albedo Spectrum Measurement in Different Ground Conditions
The fraction of the incident solar radiation reflected from the background surface is defined as the albedo. Albedo plays major role in energy balance of earth’s surface. Albedo is also important to study in order to increase the energy produced by Solar PV panels. Bifacial solar panels capture sunlight on both front and rear side. The light from sun shines directly on the front side and the reflected light from the ground or other structurers nearby gets collected by the rear face. These are emerging in the solar industry at a rather increasing rate. Gain in electrical energy production of 10-30% is advocated by the manufacturer. The chemical constituents of the surface absorb part of the incident radiation and reflects the rest. Thus, the reflected light will have different spectral contents compared to the incident radiation. Since energy conversion by PV panels depends on the spectrum of the light incident it is important to understand the spectrum of albedo from different background surfaces in order to characterize the effectiveness of these modules. In this study we present intensity and spectrum measurement of albedo from four different background surfaces.