These look viable to me - remember that boiling a kettle represents peak usage. If the average electricity consumption for a household is 4500 kWh, that means that one turbine contributes to the grid enough power for something like 12 households. I don't know what costs and carbon are associated with making the turbine, and I may have got the maths wrong. But at that rate, twenty turbines on the roof of a new build could make a real difference.
Jan - I agree noise and vibration may well be factors. This one's a pilot, to measure disturbance. That ought to mean that they'll have enough data to design protection from vibration into the new E&C developments.
Whilst I fully support LSBU for conducting the research, in truth the wind climate in London is pretty poor. I would expect a 6kW wind tubine in London to have a load factor of 10 to 15% at best. The wind turbine inverter will also use power when the wind isn't blowing (effectively in standby mode)Therefore, annual generation could be around 5000 kWh, worth around £500. The cost of the turbine will probably exceed £10k, so a long payback period. However, at least this wind turbine will be able to turn into the prevailing wind, which is more than the new 'razor' building turbines can do. The BWEA website has some useful data for anyone considering this. www.bwea.com
Thats interesting Steve, whats a 'razor' building turbine?
and Renie, I had not thought about the visual part of it. In my living room I have to sit in a particular seat unless I want to be driven mad by the bus shelter advertisement rolling up and down all the time just outside my living room almost!