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Hydro-electric power capacity to treble by 2020

 
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Aurora



Joined: 24 Jan 2007
Posts: 8502

PostPosted: Thu Jun 24, 2010 7:41 am    Post subject: Hydro-electric power capacity to treble by 2020 Reply with quote

Quote:
The Independent - 24/06/10

Britain's hydro-power plant capacity may treble by 2020 as electricity producers make use of government incentives for renewable energy, the Environment Agency said yesterday.

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clv101
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Joined: 24 Nov 2005
Posts: 7634

PostPosted: Thu Jun 24, 2010 9:22 am    Post subject: Reply with quote

Journalists... Rolling Eyes

The headline: "Hydro-electric power capacity to treble by 2020"

And the second sentence are contradictory: "The number of hydro-electric power plants in Britain is likely to rise from 400 today to 1,200 by 2020"

Sure the number of plants may treble but the capacity has no chance. I doubt trebling the number of plants will even increase the capacity by 10%.

There's a list here of the power output of Scottish power plants:
http://en.wikipedia.org/wiki/List_of_power_stations_in_Scotland#Hydro-electric

The top dozen have power output in the 10s of MW, this falls to less than 10 by the 40th and less than 1 MW by the bottom of the list. Assuming the extra 800 are on average 0.5 MW (probably hugely optimistic!) they represent an extra 400 MW capacity, or 10% extra on the current 4000 MW.
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adam2
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Joined: 02 Jul 2007
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Location: North Somerset

PostPosted: Thu Jun 24, 2010 1:46 pm    Post subject: Reply with quote

Agree entirely, trebing the number of installations wont anything like treble the power produced since almost all of the most suitable sites are already in use.

Every little helps though.
Where possible, the turbine and alternator should be sized at several times the capacity needed to utilise the available water.
40MW for the peak 6 hours daily is a lot more valuable than 10MW 24/7.

In all but the very smallest plants, remote control by the national grid would appear desireable, since hydroelectric plant starts very quickly, and can be shut down as quickly without waste or loss.
Hydroelectric plant is the best possible complement to intermitant wind or solar power.

(all the above presumes that the water is stored behind a dam to be utilised when needed. Some schemes divert part of the river flow via a turbine, without any storeage)
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