Among the challenges in piecing together a wind project is the selection of a wind turbine. Several factors are used to determine the appropriate wind turbine for each project. Primary among these is using the manufacturer's rated capacity to estimate energy production.
Some turbine manufacturers claim higher turbine name-plate capacity and therefore higher energy production than what a customer will realize. We have observed this most frequently in smaller vertical axis wind turbines (VAWT) and less frequently in horizontal axis wind turbines (HAWT). This is a particular problem if power ratings and power curves are not certified by an independent agency. I have written a whitepaper that will describe a quick method to verify, at a theoretical level, if a turbine's actual production will ever measure up to the claim. The analysis in the whitepaper and rules of thumb can be easily applied to assist you in evaluating a wind turbine for your project. A 'back-of-the-envelope' check, of both the rated capacity as stated by the manufacturer and the power curve supplied by the manufacturer, can prevent you from choosing a turbine that will not perform as advertised because, after all, the energy production cannot defy the laws of physics.
Article written by Dr. Pramod Jain
Email Pramod at pramod@frombeginningtowind.com
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