There’s a piece in yesterday’s Times on the growing interest in small wind turbines; these are wind powered devices that can be used by individual homes or businesses to generate a portion of their own energy.
That’s an exciting idea in principal, though in practice it seems roofs may not be the best place for this type of device:
But many experts caution that rooftops, while abundant, are usually poor places to harness the breeze. Not only are cities less windy than the countryside, but the air is choppier because of trees and the variation in heights in buildings. Turbulence can wear down a turbine and make it operate less efficiently…
“In an urban environment, more times than not you’re better off with a solar panel,” said Mr. Stimmel, of the wind industry association.
Another problem is that microturbines are not really cost-effective:
These tiny turbines generate so little electricity that some energy experts are not sure the economics will ever make sense.
…
“Rooftop wind economics are abysmal, since the resource just isn’t there,”…
OK, they kinda-sorta work and they’re unlikely to pay for themselves…so, what explains their popularity?
The spread of the big turbines and a general fascination with all things green are helping to spur interest in rooftop microturbines, creating a movement somewhere on the border between a hobby and an environmental fashion statement.
Ahhh, they’re cool and fashionable.
Sticking a designer wind turbine on your roof (if you an afford it) certainly makes a statement with your friends and neighbors (and it may actually generate a small amount of electricity), but it risks framing the very real need for personal environmental action in the language of fashion, which is a slippery slope to fad. The climate problem is way too huge and serious to be solved by a revolving door of “green” accessories.
Grassroots campaigns empowering people to make better personal choices are extremely important, but empowering government and industry to make those choices on a gargantuan scale is the only real hope for managing the climate crisis in the long term. This starts with people and communities certainly, and it’s fine if it starts on your roof…so long as you climb up there next to your sexy microturbine and demand better policies.



