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Thread: Grid can go 75% renewable

  1. #21
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    Please note nothing about being wood chip free.
    What hypocrisy.
    Regards PhilipA

    The bright and breezy weather helped wind and solar power make up about 28% of Britain’s electricity last month, narrowly behind gas-fired power generation, which made up 30% of the energy mix.
    SOOO Britain got to 28% solar and wind . That is a LOOONG way from 75%.
    And since when do the greenies consider gas as renewable and clean?

  2. #22
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    NavyDiver is offline Very Very Lucky! Gold Subscriber
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    Quote Originally Posted by PhilipA View Post
    UK spent STG 9.5 million to pay wind farms for not producing for one day last week when the sun shone and the wind blew.

    if they had not pulled all the wind out of the system it would have crashed.

    That is what non dispatchable power does to a network.

    Regards PhilipA
    Storing Excess energy via our Pumped Hydro or battery (not my idea of cost effective) or Hydrogen will solve that one Phillip.

  3. #23
    DiscoMick Guest
    Batteries are much cheaper than pumped hydro which involves enormous engineering costs - over $3b for Snowy Hydro 2.0.

  4. #24
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    Storing Excess energy via our Pumped Hydro or battery (not my idea of cost effective) or Hydrogen will solve that one Phillip.
    I agree .

    What about flywheels on superconducting bearings.

    In the mid 2000s there was quite a bit of discussion about building massive flywheels in abandoned mining pits eg Hunter Valley. Flywheels were used years ago in Swiss buses. Even before that when I worked at DCA as a teenager the no break Dorman Gen sets used in airports had a massive flywheel to cover the period from power failure to diesel start up, and that was over 50 years ago.

    Flywheels are used on a smaller scale at Coral Bay to stabilise the power in the transition between wind and diesel generator.

    Unfortunately I think I will be dead before these things come to fruition. Even the Snowy 2 will probably not be finished for many years.

    Regards PhilipA

  5. #25
    DiscoMick Guest
    Britain goes two months without coal power.
    Britain goes coal free as renewables edge out fossil fuels - BBC News

  6. #26
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    Oh look carbon shedding... 7 million tonnes of wood pellets, all processed overseas and then shipped in big cargo holds fuelled by bunker oil.

    The UK pulled a similar stunt with manufacturing a while back. Moves the biggest polluting industry off shore and imported the final product.

  7. #27
    DiscoMick Guest
    Quote Originally Posted by Tombie View Post
    Oh look carbon shedding... 7 million tonnes of wood pellets, all processed overseas and then shipped in big cargo holds fuelled by bunker oil.

    The UK pulled a similar stunt with manufacturing a while back. Moves the biggest polluting industry off shore and imported the final product.
    That's 5%. What about the other 95%? And they're going to close down the three remaining coal plants. Redundant.

  8. #28
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    Quote Originally Posted by DiscoMick View Post
    That's 5%. What about the other 95%? And they're going to close down the three remaining coal plants. Redundant.
    Until the country powers up. When demand climbs what then?

    Oh that’s right - import power across border as well. It doesn’t count towards their carbon calculations.

    Must be great to think only in utopian terms without the burden of current physical and economic realities to get in the way.

  9. #29
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    I wonder how they will go in the middle of winter?

    I think we can guess the answer to that.

  10. #30
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    Until the country powers up. When demand climbs what then?
    Several years ago I read about what happens in power station control rooms in the UK when there is a sudden demand. The scenario was when there was a major football match, such as a final being broadcast. As soon as the match finished the millions watching it on TV made a dash for the kitchen and turned on their electric kettles to make a cup of tea. Oops!

    With a conventional thermal power station you can keep units running on low load ready to take up the surge, but unless you have a direct line to the almighty, that is going to be a problem with a wind farm.

    I posted previously about the lack of "inertia" in a grid relying on both wind and solar, and it is still a problem.

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