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Thread: Power shares

  1. #721
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    you forget the multiplier that the market clears for the highest price to all.By reducing the highs you really affect the total return of generators.

  2. #722
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    Quote Originally Posted by horus1 View Post
    you forget the multiplier that the market clears for the highest price to all.By reducing the highs you really affect the total return of generators.
    Setting a higher floor also raises the price received by all generators. The closer price limits than we see now may also encourage generators to offer closer to SRMC rather than throwing in a huge offer at $0.01 and waiting for some other market participant to set a marginal price.

  3. #723
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    https://www.nzherald.co.nz/technolog...box=1600228943

    Microsoft to invest $100M in a cloud system in Auckland. Does anyone have some idea's on power demand from such a project? Will it be significant to consider?

  4. #724
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    Quote Originally Posted by gains View Post
    https://www.nzherald.co.nz/technolog...box=1600228943

    Microsoft to invest $100M in a cloud system in Auckland. Does anyone have some idea's on power demand from such a project? Will it be significant to consider?
    not significant energy usage on a national scale.
    For clarity, nothing I say is advice....

  5. #725
    Junior Member teabag's Avatar
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    Does anyone know rough figures for the efficiency of the Onslow scheme - In the sense of the ratio between running the surplus water directly through a generator, compared to pumping it to Onslow and then out again?

  6. #726
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    Quote Originally Posted by teabag View Post
    Does anyone know rough figures for the efficiency of the Onslow scheme - In the sense of the ratio between running the surplus water directly through a generator, compared to pumping it to Onslow and then out again?
    Yes, I can answer that. The Roxburgh generators are currently 90% efficient, but that will increase shortly due to new runners being installed in 4 of the 8 generators. New average efficiency is likely to be 91%. K14 may be able to give better numbers on that if he sees this post.


    Depending on whether Onslow uses variable speed turbines, reversible turbines, or fixed pump turbines, Onslow will be around 88% pumping and 91% generating for a combined efficiency of 80% in the best case or around 75% if the cheapest option is taken. This decision would be part of the $70 M investigation.

    Of course I am pushing for the most efficient variable speed, reversible turbines.

  7. #727
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    thx Jantar, that is a lot better than I would have initially guessed

  8. #728
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    AGL expands 'virtual power plant' beyond South Australia

    https://www.afr.com/companies/energy...0200921-p55xth

    maybe jantar , horus1 etc could comment on how or if this type of virtual operation could potentially impact on power companies here ?
    one step ahead of the herd

  9. #729
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    Quote Originally Posted by gains View Post
    https://www.nzherald.co.nz/technolog...box=1600228943

    Microsoft to invest $100M in a cloud system in Auckland. Does anyone have some idea's on power demand from such a project? Will it be significant to consider?
    Agree with Peat's comment.

    Would just add modern server farms use highly efficient PSU's (85%+) and strong power management techniques to reduce load. Cooling will draw significant current, but over all power consumption will be a tiny blip on NZ's electricy radar.

    Economically there's not a lot in a data centre for NZ as very few jobs are created outside of the initial construction, but data sovereignty might be one big advantage, as long as the US courts don't continue their attempts to chip away at that.

  10. #730
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    I think that this makes sense BUT in NZ the generators are trying to stop new entry and with Tiwai leaving will not do anything to increase distributed generation but bleed the NZ domestic consumer.So it will not happen here.

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