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  • FIRST POST
    • Martyn1981
    • By Martyn1981 9th Jun 15, 7:25 AM
    • 5,373Posts
    • 9,163Thanks
    Martyn1981
    Green, ethical, energy issues in the news.
    • #1
    • 9th Jun 15, 7:25 AM
    Green, ethical, energy issues in the news. 9th Jun 15 at 7:25 AM
    I thought it might be a good idea to have a thread for posting general news items that may be of interest.

    PV and the 'Solar in the news' thread attract a lot of interest, so here's a thread for all the other goings on.

    Mart.
    Just 'call me Mart'. Cardiff. 5.58 kWp PV systems (2.4 ESE & 1.18 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
Page 29
    • ed110220
    • By ed110220 18th Apr 17, 1:05 PM
    • 1,042 Posts
    • 531 Thanks
    ed110220
    By fixed, i meant that they are fixed no matter how much or little the plant is used, so you might as well use it as much as you can, as not using doesn't save you anything significant. Halve the output and have to sell the electricity for twice the price and it's not difficult to see why that would make no sense, unless the plant was unfeasibly cheap.

    Think about it - even if there are technical limits to how much a reactor can load follow, it's not difficult to imagine how one achieve the same end simply by dumping the heat it produced as waste rather than using it to make electricity or even just wasting the electricity it did.
    • NigeWick
    • By NigeWick 19th Apr 17, 10:04 AM
    • 2,638 Posts
    • 939 Thanks
    NigeWick
    Same with everything really.

    But at what cost? With current battery inefficiencies and lifespans? And what of the defunct batteries, where do all the non-recyclable parts go? What about super high current industries?
    Originally posted by lstar337
    I'm talking specifically about decommissioning nuclear power plants and the 20,000 years to keep the waste safe.

    Renewables are getting cheaper, not dearer (like coal, gas & nuclear). As technology improves what we've got and comes up with new products it will become even better value. Early adopters will pay for new technologies allowing for further research to improve things.

    25-30 years for offshore wind turbines which can mostly be recycled against what for nuclear which can't?

    Which non recyclable parts?

    Produce more current.
    The mind of the bigot is like the pupil of the eye; the more light you pour upon it, the more it will contract.
    Oliver Wendell Holmes
    • Martyn1981
    • By Martyn1981 20th Apr 17, 4:34 PM
    • 5,373 Posts
    • 9,163 Thanks
    Martyn1981
    The concensus on speakev forum is that it is using the extremes of the battery storage, full and empty, that leads to degredation. So setting a maximum max charge 5 or 10kwh below the max and only discharging to say 50% required for day to day driving would have negligible impact on longevity.
    Originally posted by michaels
    Thanks for that. I've been doing more reading and Youtub'ing and that certainly seems to be the consensus. I hadn't realised that leaving the batts fully charged (when not needed) was bad for long term life, live and learn.

    Just watched a TeslaTimeNews that in turn repeated a piece from Teslanomics (hope I've gotten the acknowledgments correct) - Tesla owners were asked to provide battery efficiency figures and number of cycles, the results surprised me.

    At around 700 cycles (roughly equal to 7 normal years mileage) the batts were slowly heading down towards 94% efficiency. That sounds pretty good to me.
    Just 'call me Mart'. Cardiff. 5.58 kWp PV systems (2.4 ESE & 1.18 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • Martyn1981
    • By Martyn1981 21st Apr 17, 1:16 PM
    • 5,373 Posts
    • 9,163 Thanks
    Martyn1981
    Britain set for first coal-free day since the industrial revolution

    The UK is set to have its first ever working day without coal power generation since the industrial revolution on Friday, according to the National Grid.

    The control room tweeted the predicted milestone, adding that it is also set to be the first 24-hour coal-free period in Britain.

    The UK has had shorter coal-free periods in 2016, as gas and renewables such as wind and solar play an increasing role in providing the country with power. The longest continuous period until now was 19 hours – first achieved on a weekend last May, and matched on Thursday.
    Just 'call me Mart'. Cardiff. 5.58 kWp PV systems (2.4 ESE & 1.18 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • zeupater
    • By zeupater 21st Apr 17, 2:02 PM
    • 3,560 Posts
    • 4,375 Thanks
    zeupater
    ... At around 700 cycles (roughly equal to 7 normal years mileage) the batts were slowly heading down towards 94% efficiency. That sounds pretty good to me.
    Originally posted by Martyn1981
    Hi

    ... oddly enough I watched something on that yesterday (possibly the same video), followed by reading a number of items on Prof Goodenough's solid state glass cells eg ( https://news.utexas.edu/2017/02/28/goodenough-introduces-new-battery-technology .. note link to RSC published journal ) ... really interesting, & possibly a next generation game changer if/when commercialised and consumerised, which considering the emphasis on cheap, reliable, high density and long life storage at the moment would likely result in a massive investment potential leading to mass market lead-times far shorter than that of Lithium-ion.

    Interesting times indeed
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
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