# Tag Info

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The U.S. National Renewable Energy Lab did a study of solar installations in the U.S. in 2013 and determined that for large-scale solar PV systems, 7.9 acres (31,970 $m^2$) of land are required on average for 1 $MW_{ac}$ of power capacity (from Table ES-1). This is based on analysis of 72% of existing installations in the country, so this is a good real-...

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The Betz limit is based on an extremely crude model for an actuator disk. If you want to compare the performance of the product of a billion dollar industrial development program, let's at least use a respectable benchmark. Image lifted from: Ideal Optimum Performance of Propellers, Lifting Rotors and Wind Turbines - https://openscholarship.wustl.edu/cgi/...

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The wind turbines basically extract energy from the moving air. The Betz limit is essentially the maximum percentage of energy that is possible to extract from the air (the limit has to do with the fact that the air need to keep moving). When you use 1 blade, when energy is extracted from one part of the disk the other side is relatively unaffected. In order ...

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Top 3 in Compendex database are Energies, and this one and this one. Only Energies has full Open Access, the other two supports Open Access but most articles are paid. ScienceDirect is just a Database used to find an article and read the abstract. For actual access, unless you have an institution credential, you'll have to Google the article and find it ...

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Depending on what you are looking exactly, you probably will be able to find a lot of relevant data in the european union page for energy. the link is Energy Statistics an Overview

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