“This method can be applied for LEED NC Energy & Atmosphere Credit 2. This credit requires a calculation for the energy generated by a renewable source.

For example, a typical wind turbine model can be selected and the proper values put in according to the manufacturer’s specifications. To make the example more flexible, data was added for seven types of turbine models from one manufacturer (ROPATEC 2011):  Easy Vertical (1), Simply Vertical (2), Simply Vertical HE (3), Maxi Vertical (4), Maxi Vertical HE (5), Big Star Vertical HE (6), and Giga Star (7).  Then an if/then statement was set up to determine the “Surface” for each model.”

Read on here ..
Thanks to Xin Zhao (Stan)