This may be of interest to the more expert of our readers who can probably show me where I have gone wrong in my calculations…the BBC are pretty quick to highlight apparent success of power generation by ‘renewables’…but should they be digging a bit deeper…are wind turbines any where near as good as even the very modest claims that are made for them?
Having seen the BBC report on Scottish renewables I had a look and checked some of the figures…not being a climate expert, or technically literate or brilliant with numbers this may be all wrong but have a look yourself:
Scotland produces 126% of its power needs.
Of that 26.8% is generated by renewables.
Around 36% of ‘consumed’ power comes from renewables.
The rest comes from conventional sources.
Consumed power is obviously 100% of Scotland’s needs and yet it generates 126%……the surplus is exported.
Those figures suggest that conventional sources still produce 99.2% of power generated as renewables produce 26.8% in total. (You could claim renewables only produce 0.8% of Scottish power depending how you report the figures)
Therefore Scotland is paying for all the renewable sources on top of its conventional capacity which could by itself still keep the lights on in Scotland.
Scotland gets money back for its exported power…but is it at a price that repays the investment in renewables that produce it? And what happens when they have closed the sources of that power down…the revenue stream that subsidises renewables dries up?
It is also apparent that wind farms are not producing anywhere near the power that they promise…it is hydro that is producing the bulk of the renewable power and in a far more efficient way…and that is considering hydro is itself only (I believe) 25-30% efficient…whilst the Scottish government claims wind is uniquely 40% efficient in Scotland.
Onshore wind capacity = 3.6 Gw…..it generated 7,004 GwHr
Hydro capacity …………= 1.5 Gw……it generated 5,332 GwHr
Giving a generation figure per Gw of capacity:
OSW….1945.5 GwHr/Gw capacity
Hydro…3554.7 GwHr/Gw capacity
Hydro is more expensive but it looks far more efficient at converting capacity to actual power.
Whilst CO2 reduction is the only game in town it seems that the wind turbine is not the answer.
No one has told the BBC yet…or they certainly aren’t telling us.