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    • Martyn1981
    • By Martyn1981 9th Jun 15, 7:25 AM
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    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
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    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
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    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
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    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
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    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
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    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
    • Martyn1981
    • By Martyn1981 29th Apr 17, 6:13 PM
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    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
    Further (again) to what you said, I've been watching the news about Tesla's repricing this last week. They've dropped the 60 model from the Tesla S range, but reduced the price of the 75 by $7,000.

    But the interesting part was that they've greatly reduced the cost of the 'upgrade' to unlock the full 75kWh battery on 60kWh models, to just $2,000.

    I didn't even know they had larger locked batteries on some models. The 'upgrade' is just a download.

    Anyway, the point that was made, was that having a 75kWh battery locked at 60kWh (but costing less to buy than a 75 model), means that whilst you have less range, you don't degrade the battery as much (as you said), plus they charge to 60kWh (fake full) quickly, as batt charging slows down as you get nearer to full.

    All interesting lessons, for 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 4th May 17, 7:24 AM
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    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
    And more confirmation again (I'll shut up after this):

    The Workhorse W-15: The Electric Truck With A Lower Total Cost Of Ownership Than A Ford F-150

    The battery pack is 60 kWh nameplate with 45 kWh usable to ensure a long life for the pack.
    Impressive truck.
    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 4th May 17, 7:27 AM
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    Martyn1981
    Energy entrepreneurs turn to storage as renewables prospects slow

    Growth in clean energy has flatlined in the wake of subsidy cuts, prompting energy entrepreneurs to set their sights on storage as the next big opportunity
    Faced with a "challenging" renewables market, many entrepreneurs are looking to storage to deliver future growth, the report notes. There was only 20MW of battery capacity in operation at the end of 2016, but by the end of 2020 this is expected to grow 100 times over, with more than 2.3GW of new battery projects already in the planning system.

    Most of this new business is going to smaller players, the report points out. Independent storage developers secured contracts for 407MW in the recent Capacity Market auctions, compared to just 105MW from the 'Big Six' energy suppliers.

    Iain Robertson, vice president of renewables at SmartestEnergy, said more must now be done to ensure renewables and storage can maximise their potential in the energy system. "We call on the government to recognise the role renewables and storage can play in its forthcoming industrial strategy, and to allow them to compete with traditional generation on a level playing field," he said in a statement.
    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.
    • silverwhistle
    • By silverwhistle 4th May 17, 10:20 AM
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    silverwhistle
    https://www.theguardian.com/business/2017/may/04/nissan-launches-british-made-home-battery-to-rival-teslas-powerwall

    Did I get in before Martyn ??
    • zeupater
    • By zeupater 4th May 17, 11:41 AM
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    zeupater
    Hi

    The article is somewhere around 12 months behind the news curve, but in the way it's presented they've raised a number of questions, notably ...

    British made ? - "They are believed to be the first British-made household batteries" ... "While the batteries will be made in Sunderland, they will be assembled in Morocco." ... well, considering the battery offering consists of a number of cells configured in both parallel & serial packs with fuses & controlling electronics then I would consider that the batteries were made in Morocco, using some British sourced components (ie pre-owned & new cells), but then again, logic isn't really a journalism or marketing priority ...

    Price ? - "Buyers will be able to choose cheaper, used batteries that are no longer fit for electric car use, or pricier new ones." ... "The lithium-ion batteries will be priced from £5,000 and up" ... "The new batteries will come with a 10-year warranty; those reused from cars will have a five-year warranty." .... does this mean that £5000 represents the use of recycled (/pre-used) vehicle cells which carry a 5year warranty? - if so, the Tesla offering used as a direct comparison in the article certainly looks a lot more appealing.

    .. It's also interesting to note the potential for movement in price ... 12 months ago Nissan were reportedly saying that "the storage units, which are available to pre-order from September, are designed to be the most affordable in the market at £3,200 for the full installation of a 4.2KWh unit."( http://utilityweek.co.uk/news/nissan-enters-domestic-storage-market-with-xstorage/1241912#.WQr_CMbau00 ), so that's a significant price increase on units using second-hand reduced capacity cells with a reduced warranty, which if true effectively removes the product from any reasonable person's short list. For the units to be in any way attractive even at current market prices, they'd need to be around £2k fully installed, not £5k ....

    HTH
    Z
    Last edited by zeupater; 04-05-2017 at 1:25 PM. Reason: -s +d
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • silverwhistle
    • By silverwhistle 5th May 17, 12:22 PM
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    silverwhistle
    Cheers Z. I didn't look at the detail but I'd only go into spreadsheet mode when my instincts tell me, and that is some way down the line. I'm not well-enough off to be an early adopter. More likely to get an electric vehicle than domestic batteries, but my car is only 7/8 years old, so some time to go for that too.
    • Martyn1981
    • By Martyn1981 5th May 17, 4:03 PM
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    Martyn1981
    Hi

    The article is somewhere around 12 months behind the news curve, but in the way it's presented they've raised a number of questions, notably ...

    HTH
    Z
    Originally posted by zeupater
    This article also mentions the apparent price rise, plus the availability of Manchester City special editions ...

    Eaton and Manchester City announce energy storage partnership, first units to ship in July
    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 5th May 17, 4:22 PM
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    Martyn1981
    The latest BEIS (formerly DECC) Public Attitude Tracker survey is out. PV and off-shore wind still head the popularity charts with around 80% support and 4 or 5% opposition.

    Most important (to me) is that for on-shore wind the trends continue with support slowly growing over the years, now at 73% support and 9% oppose.

    Also the belief that - Renewable energy developments should provide direct benefit to the communities in which they are located - remains solid at 77% support v's 5% oppose.

    Public support for renewables reaches ‘record highs’

    Energy and Climate Change Public Attitudes Tracker: Wave 21

    (see wave 21 summary tables for the percentages)
    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.
    • michaels
    • By michaels 6th May 17, 11:07 AM
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    michaels
    Democracy and on shore wind is an interesting one. High 90s percent of people will only ever be marginally impacted but a few may be badly affected so just going on public opinion may not be 'fair'.
    Cool heads and compromise
    • Martyn1981
    • By Martyn1981 6th May 17, 12:06 PM
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    Martyn1981
    Democracy and on shore wind is an interesting one. High 90s percent of people will only ever be marginally impacted but a few may be badly affected so just going on public opinion may not be 'fair'.
    Originally posted by michaels
    I agree, but it's the trend that interests me. Solar and off-shore wind have always enjoyed very high support, with very little opposition, but the support for on-shore wind has grown, whilst opposition has fallen, and crucially over the years when on-shore wind has been installed.

    Doesn't prove anything, but suggests to me, that the reality of on-shore wind is not 'as bad' as some expected, and even after such a shortish period as we've seen so far, folk are already less concerned.

    I suppose it also helps that the large WT's are very quiet, so again reality trumps fear of the unknown.
    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 6th May 17, 5:45 PM
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    zeupater
    Democracy and on shore wind is an interesting one. High 90s percent of people will only ever be marginally impacted but a few may be badly affected so just going on public opinion may not be 'fair'.
    Originally posted by michaels
    Hi

    It's highly likely that the most vocal opinions come from those who aren't directly affected, but have affiliation to (or support the views of) some group or other ....

    Time & time again the same 'interested' individuals seem to appear with an intent to disrupt 'local' schemes which will have direct impact on their (& their neighbours') daily lives, even if they need to travel hundreds of miles from their homes to do so! ....

    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • Martyn1981
    • By Martyn1981 6th May 17, 6:18 PM
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    Martyn1981
    Speaking of on-shore wind, anyone fancy some subsidy free?

    Well, sort of. This analysis of a CfD auction in 2018 (which my be theoretical, I'm not sure) suggests that 1GW of on-shore wind could 'be got' for £50/MWh.

    Now, quick explanation of a contract for difference strike price, it guarantees to make the sales price up to the strike price by adding a subsidy payment. But, and here's the important bit, if you sell the leccy for more than the strike price (perhaps at peak times) then the amount above the strike price gets paid back to the subsidy fund/pot.

    In this example, they expect the on-shore wind to receive top ups at the start, but pay them all back from reductions as the wholesale price rises through the 2020's, so hence subsidy free over the 15yr CfD term.

    An analysis of the potential outcome of a further ‘Pot 1’ CfD auction in GB

    What is alarming is that they estimate that today (2017) CfD's for on-shore wind could be £50/MWh and PV £60/MWh, when the 2017 cost of new nuclear (HPC) is £100/MWh.

    The report even gives the 2012 money equivalent as £46.10, about half the HPC £92.50 figure.

    No wonder the government is excluding on-shore wind and PV from the CfD contracts, it could be very embarrassing for them to get a 'real' update on the 2015 prices of £80/MWh (now £83).

    PS. Still no news on the results of the off-shore wind CfD auction from April, but rumours are still rife that they will come in at (or below) the HPC CfD too.
    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 8th May 17, 2:42 PM
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    Martyn1981
    Just because it's in Wales:

    Vattenfall has commenced full commercial operations at the 228MW Pen y Cymoedd wind farm in Wales.

    Annual generation is equivalent to approx 15% of all Welsh household demand ...... so another 6 wind farms perhaps, please?
    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 8th May 17, 4:49 PM
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    Martyn1981
    Germany Breaks A Solar Record — Gets 85% Of Electricity From Renewables

    On April 30, Germany established a new national record for renewable energy use. On that day and throughout the long May 1 weekend, 85% of all the electricity consumed in Germany was produced from renewables such as wind, solar, biomass, and hydroelectric power. Patrick Graichen of Agora Energiewende Initiative says a combination of breezy and sunny weather in the north and warm weather in the south saw Germany’s May 1 holiday weekend powered almost exclusively by renewable resources.
    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.
    • lstar337
    • By lstar337 11th May 17, 9:25 AM
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    lstar337
    New device generates power from polluted air!
    A new device shows promise in purifying polluted air, while at the same time producing hydrogen, which can be stored for use as a clean energy source.
    https://www.treehugger.com/clean-technology/researchers-develop-device-purifies-polluted-air-while-generating-hydrogen-sunlight.html
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