Solar Efficiency Mapping for Roofs

(Image Credit: University of Gothenburg)

Solar cells are being more commonly utilized in both commercial and industrial structures as a means to reduce energy costs. However, not all buildings in a site are created equal in terms of solar panel suitability, and neither are all the sections of a roof. Variables such as shadowing, gradient, and sunlight angle all play a role in determining the amount and intensity of sunlight which an area receives.

In order to help gauge these levels, scientists at the University of Gothenburg have worked together with WSP Analysis and Strategy to create a GIS system called SEES (Solar Energy from Existing Structures) that can calculate the energy potential of actual roofs. It takes data from computer-based geographical information systems (GIS) to analyze the shadows cast by buildings, trees, and terrain. The output is a solar efficiency map similar to thermal imaging, where warmer colors show areas of higher solar irradiance.

(Image Credit: University of Gothenburg)

The effect can be calculated for each month or for a full year. The results can help determine the suitability of different locations for solar panels, effectively increasing collection potential for areas where the necessary data for analysis is made available.

Source: Science Daily