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Coming shortage of UK generating capacity?
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vtsnowedin



Joined: 07 Jan 2011
Posts: 4757
Location: New England ,Chelsea Vermont

PostPosted: Sun Oct 07, 2018 2:57 am    Post subject: Reply with quote

adam2 wrote:
No, the stated figures refers to the electrical output, 1Gw is 1Gw whether produced from coal, or from biomass.
I don't want to start a long or acrimonious debate about it, And you maybe right, but I can't see how say a one megawatt coal plant could switch to wood or some other bio fuel and still produce one megawatt of power. You would have to rebuild it from stock yard to smoke stack to account for the increased volume needed to obtain the same BTUs in a given volume of coal.
Maybe they run it on higher settings (if the machinery is capable) or for more hours a day but being a very skeptical individual I'd need to see the actual output figures to swallow that one.
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adam2
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Joined: 02 Jul 2007
Posts: 6730
Location: North Somerset

PostPosted: Tue Oct 09, 2018 1:30 pm    Post subject: Reply with quote

Most UK coal burning power plant burn pulverised coal, this is blown into the furnace by compressed air and burns almost instantly.

It is a relatively simple matter to blow a larger volume of wood chips into the furnace instead of coal.
Steam is raised in the same way and the steam turbine and alternator will have the same output, these components do not "know" what fuel was burnt to produce the steam.

Oil is burnt during initial lighting up, until a stable flame pattern from the coal or wood chip fuel results. No oil is used in normal operation, only for starting.
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