Small Scale Wind Turbine Power Claims Grossly Overstated: New UK Report
Every time I've written about small-scale wind turbines, it's always couched in language about them not being appropriate for all locations, in some not ever generating enough energy to offset their embedded carbon emissions, et cetera. They still may have good use in some applications, but for general home usage there are probably better ways to get green power. Well, a new study which The Guardian is highlighting details how home wind turbines actually perform. It doesn't look so good: 5-10% of Rated Power Output
Though the turbines surveyed by Encraft did generate enough electricity to light an energy efficient home, on average "this still only represented 5-10% of the manufacturer's claims" regarding output. The best performing turbines surveyed could generate enough electricity to offset the amount of electricity needed to manufacture them in two years, while the worst ones could take up to 40 years to do so.
For comparisson, the BWEA states that for industrial scale wind turbines, the actual power produced by the turbine is about 30% of its theoretical maximum capacity.
Small-Scale Turbines Inappropriate For Many Locations
While Encraft's managing director did say that in some locations home wind turbines are still a good investment, in the majority of locations this isn't the case: "Sadly, an average semi-detached house, like the areas where most people live, where there are obstructions like trees and buildings, are poor locations."
via: The Guardian
For the record...from the access to the report I have, the inclusion of this picture is not meant to be an indictment of this specific wind turbine (some turbines performed better than others), but is just representative of the scale of turbine discussed. Photo: thingermajig via flickr
Hot Home Wind Turbines You Can Actually Buy, Plus One You Wish You Could
10 Small-Scale Wind Turbines Cut NYC Apartment Building's Electric Costs in Half
Windspire Vertical Axis Wind Turbine Wins PopSci Award, Make Opens New Factory