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Are you sure about this, John? – pumping …

Comment posted Water Resources (Scotland) Bill introduced – issues arising by Robert Wakeham.

Are you sure about this, John? – pumping & generating at the same time doesn’t seem to make any sense, and building a bigger dam seems highly improbable, as 10% of the reservoir replenishment comes from feeder canals tapping streams around the mountain – and they’d be too low if the dam was higher, whereas there doesn’t appear to be room to enlarge the reservoir by building a new dam significantly ‘downstream’ from the existing one.
It’s designed to sell power to the grid at times of peak demand, and replenish the reservoir by using cheap off-peak power to drive the turbines as pumps. Apparently it also provides an almost instant (2 minutes from standing, 30 seconds if spinning) emergency power supply to the grid to ‘kick start’ any other power stations in the event of a major shut-down preventing them from drawing the electricity from the grid that they would need to power-up again.

Robert Wakeham also commented

  • ‘since all modern stations use the pumped return system’ – if this is a suggestion that pumped storage is the order of the day, I’d be surprised because a good few recent hydro power projects seem to have been ‘run of the river’ which, by definition, can’t be pumped storage.

Recent comments by Robert Wakeham

  • With Heb Isles in for repairs, CalMac charters replacement vessel to reduce underprovision for Islay
    Scott Smith – you give the impression that you have advance knowledge of future vessel deployments, but you get your dates, boats and places jumbled up. Any chance you could clarify these, please?
  • With Heb Isles in for repairs, CalMac charters replacement vessel to reduce underprovision for Islay
    A movable mezzanine deck that can’t be repaired unless the ship is dry docked?
    Sounds a bit like a car that needs dismantling before the oil can be changed. I wonder if someone specified some really exotic features on that mezzanine deck that no commercial ship owner in their right mind would dream up in their worst nightmare – but which the ship builder was only too happy to install, if the price was right?
  • With Heb Isles in for repairs, CalMac charters replacement vessel to reduce underprovision for Islay
    The comments on this particular thread (at least, those that are relevant and not just trying to make everything political) can be read as reflecting wider concerns, and it’s now being reported in the newspapers that the seriously inadequate response of Calmac when the Hebridean Isles had to be withdrawn from service for repairs in the middle of the summer tourist season is going to be reviewed at a meeting in Islay in October, reportedly to be hosted by our MSP, to hold Calmac, Transport Scotland and the Government to account.
    Hopefully they’ll have the sense to leave the bullshit on the mainland.
  • With Heb Isles in for repairs, CalMac charters replacement vessel to reduce underprovision for Islay
    The BBC Scottish News website today has a lengthy item about Calmac’s trials and tribulations with the good ship Isle of Arran.
    However, it’s really only padding out the previously known facts as deemed suitable for release by Calmac, and leaves the details of the boat’s problems unexplained. It’s basically a case of ‘bear with us, there’ll be jam tomorrow’.
    Someone needs to spell out to the Calmac management – and our Holyrood politicians – that if you drive an old banger that wouldn’t pass its MOT and gave the police some feeble excuse about not being able to find spare parts you’d wind up in court.
    The BBC could at least have asked Calmac to explain what sort of problems were making the boat more susceptible to weather cancellations – and as to the Finlaggan running about with a broken mezzanine deck and the Heb Isles crashing into Kennacraig pier, maybe the BBC consider these matters to be unworthy of reporting, let alone investigation.
  • With Heb Isles in for repairs, CalMac charters replacement vessel to reduce underprovision for Islay
    Quoting me out of context, NCH – but it’s nice to know that you read my despicable comments in the Herald, as well as enthusiastically scrutinising this, your favourite despicable blog. Chin up, don’t let your enemies get you down.

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