andrew wrote:And is every bulding structurally suitable? No. So it would have to be ground mounted so where does the space come from? Also, wind turbines are subject to planning permission and I suspect most would be refused.
Aside from these fundamental issues, there is another even more vital issue: where does the money come from? The UK is broke so the government can't foot the bill and spending my already stretched funds on a piddly wee desk fan to stick on my roof is not a financial priority.
Structural considerations are rarely an issue for the size of turbine typically put on a building. However, location is very important. City centre buildings with turbulent wind, plus wind shadow from existing buildings is a big issue. A colleague has data showing that turbines installed in many schools only achieve 20% of their published capacity. OK, the educational value of a turbine at a school is worthwhile, but it doesn't make sense for generating power.
As for cost, the UK electricity regulation subsidises renewable power generation through the Feed In Tariff Scheme (FITS). It is aimed at building scale micro generation which can be more effective because it avoids grid distribution losses. The scheme currently include PV and wind, but will soon be extended to biomass boilers and ground source heating. http://en.wikipedia.org/wiki/Feed-in_ta ... ed_Kingdom
There is also the Renewable Heat Incentive (RHI)from 2012http://en.wikipedia.org/wiki/Renewable_Heat_Incentive
There are now companies that will install PV on your roof for free, they recover the cost through sharing your FITS payments. So you can afford it, it is possible to get it for free.http://www.energysavingtrust.org.uk/Gen ... -PV-offers
Finally, naysayers will complain that micro generation only scratches the surface. However, building regs will require all new homes to be carbon neutral from 2016. At that point, micro germination will have a big impact.
However, what do you do with all that solar & wind energy that you don't use? Store it in your car's fuel cell. So your car will power your house at night using energy captured during the day. Of course it won't be direct, your car will be plugged into the grid at the train station or work, while your home is putting energy into the grid a couple of miles away.