jm + electricity   9

Bitcoin must die
If Bitcoin were to cease trading tomorrow, 0.5% of the world’s electricity demand would simply disappear. This is roughly equivalent to the output of ten coal-fired power plants, emitting 50 million tonnes of CO2 per year – which would cover one year’s worth of the carbon emission cuts required to limit temperature rises this century to 2C. It is not a solution by itself, but it would be a good year’s work. Bitcoin is made from ashes, and if ashes were legal tender, humanity would burn everything in sight and call it progress.
environment  bitcoin  ecology  future  earth  cryptocurrencies  pow  electricity  climate-change 
8 weeks ago by jm
Crazy maths makes nonsense of Irish climate change policy
'John FitzGerald on madness of Ireland burning peat for electricity:

'the current subsidy per job involved is at least €100,000 a year. The Bord na Móna annual report indicates that, in the year 2016/2017, its workers’ average pay was €50,000. In other words, the subsidy per job is around twice what the workers involved actually earn.

If the peat-fired power stations were closed tomorrow, and the workers involved continued to be employed on their current wages, subsidising these jobs would only cost €50 million, not €100 million. Electricity consumers would pay less to subsidise these jobs, and Ireland’s greenhouse gas emissions would fall substantially as a result of discontinuing this polluting fuel use.'

We should plan for closure by 2020 of peat-fired electricity generation:

–greatly benefit environment;
–save electricity consumers money;
–protect livelihoods.
environment  peat  ireland  electricity  fossil-fuels  policy  climate-change 
june 2018 by jm
The private monorail tunnel under North London
20km of private monorail owned and operated by the electricity grid, used to monitor and inspect one of the longest 400kV circuits in Europe
power  monorail  transport  london  underground  tunnelling  electricity  cool 
october 2016 by jm
GCHQ intervenes to prevent catastrophically insecure UK smart meter plan - The Inquirer

GCHQ barged in after spooks cast their eyes over the plans and realised that power companies were proposing to use a single decryption key for communications from the 53 million smart meters that will eventually be installed in the UK.


holy crap.
gchq  security  smart-meters  power  uk  electricity  gas  infrastructure 
april 2016 by jm
They called it "big iron" for a reason: the Cray Motor-Generator Unit
I think the deal with the Motor-Generator Unit was that the Cray 1 needed not just enormous amounts of power (over a hundred kilowatts!), but also very stable power. So it ran from a huge electric generator connected directly to a huge electric motor, the motor running from dirty grid power and the generator, in turn, feeding the computer's own multi-voltage PSU. The Cray 1 itself weighed a mere 2.4 tonnes, but all this support stuff added several more tonnes.


via RobS.
via:rob-synnott  cray  history  big-iron  motors  power  electricity  generators 
april 2014 by jm
Bitcoin Mining Operating Margin
"The graph showing miners' revenue minus estimated electricity and bandwidth costs." -- down to -694% right now, oh dear
bitcoin  via:peakscale  economics  mining  profit  revenue  charts  electricity  bubble 
october 2013 by jm
Nikola Tesla Wasn't God And Thomas Edison Wasn't The Devil
Correcting some egregious misconceptions about an Oatmeal comic regarding Tesla and Edison -- explaining some realities about invention, scientific progress, and the history of electricity. "I’d contend that nearly every invention in the engineering or sciences is an improvement on what has come before – such as Tesla’s improvements to alternating current. That’s what innovation is. It’s a social process that occurs in a social context. As Robert Heinlein once said, “When railroading time comes you can railroad -- but not before.” In other words, inventions are made in the context of scientific and engineering understanding. Individuals move things forward – some faster than others – but in the end, the most intelligent person in the world can’t invent the light bulb if the foundation isn’t there."
nikola-tesla  history  electricity  innovation  invention  progress  science  thomas-edison  the-oatmeal 
may 2012 by jm
Turning Ireland's water and wind into energy exports
Ars Technica on the "Spirit Of Ireland" pumped-hydro proposal -- great comments
ars-technica  pumped-hydro  spirit-of-ireland  electricity  renewable-energy 
february 2012 by jm
Nuclear energy: Inside the black box
What's going on inside the Fukushima nuclear reactor, and how it is hoped meltdown can be averted
nuclear-power  meltdown  disasters  japan  fukushima  power  electricity  nuclear  from delicious
march 2011 by jm

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