on a horizontal surface can now be calculated using the direct irradiance -Edirhor and diffuse irradiance Ediffhor on the
The global irradiance EG,hor ance horizontal plane and the degrees of shading Sdir and S^f hor
The global irradiance EG tilt on a tilted surface can be calculated analogously. A corrected albedo value A can be used to consider any possible reduction of the ground reflection Erefltilt (see also Equation 2.35). Hence, the global irradiance becomes:
ÎTlIiII dir.ill I
The methods described here are implemented in the SUNDI software that can be found on the CD-ROM of this book.
Figure 2.24 Dimensions of Solar Energy Systems and Support Structure Rows
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Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.