OT Solar power.

http://www.theguardian.com/commentisfree/2014/jul/07/solar-has-won-even-if-coal-were-free-to-burn-power-stations-couldnt-compete?CMP=EMCNEWEML6619I2
Not be long before it's the same here. No wonder the mine owners in Oz are getting so desperate to export their coal.
https://en.wikipedia.org/wiki/Insolation
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On Tue, 08 Jul 2014 08:49:41 +0100, harryagain wrote:

That's one hell of an extrapolation. The UK is somewhat different to Australia, both in terms of available sunshine and in terms of the national grid infrastructure.
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harryagain wrote:

You don't even need to read the article, the ifs and buts are in the subhead
"solar could be economically viable" ^^^^^

Oh, when are we getting Aussie sunshine and monthly high temperatures from 36 to 49 degrees?

It'll give the Germans somewhere to buy mucky lignite from when they've finished devouring villages and motorways.
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We don't export lignite.
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On 08/07/2014 08:49, harryagain wrote:

...
So, when do we get moved to the latitude of Egypt, which is roughly as far from the equator as Queensland?
--
Colin Bignell

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On Tuesday, July 8, 2014 8:49:41 AM UTC+1, harry wrote:

... a nonengineer writes an article on engineering.
NT
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On Tuesday, 8 July 2014 10:20:22 UTC+1, snipped-for-privacy@care2.com wrote:

data specialist ?
"data and software specialists like Google and Apple"
It's hardware where teh power saving will be made.
I'm not saying it wouldn't be nice for solar to be more viable but I wouldn;t want my fridge/freezer turning off at night.
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On 08/07/2014 10:45, whisky-dave wrote:

They could be made to work that way, with enough insulation. Ice houses were capable of storing ice from one winter to another without any type of powered refrigeration.
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Colin Bignell

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They needed to be pretty big, though, at least before celotex. Also, they only held temperature at zero (thanks to latent heat) so not much good as *freezers*.
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On 08/07/14 11:17, newshound wrote:

I did the calculations once. IIRC 3 metres of stone castle wall fully meet modern insulation requirements and, if hung with tapestry, exceed it.
--
Ineptocracy

(in-ep-toc’-ra-cy) – a system of government where the least capable to
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On Tuesday, 8 July 2014 12:15:50 UTC+1, The Natural Philosopher wrote:

Not many people owned or lived in castles with 3 metre thick walls. Also yuo can;t get below zero using water/ice can you ?
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On 08/07/14 16:08, whisky-dave wrote:

You could with salt + water + ice :)
(Hint - Victorians had ice cream which needs <0 to make, and not much in the way of freezers).
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Unless you add salt ...
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On 08/07/2014 11:17, newshound wrote:

Odd that their pricing system is quite so unstable.
Hell will freeze over first. UK latitude makes solar power here a joke.
Restricted mainly to lashings of hot water in mid summer just a handful of truly sunny days. Solar PV in the UK at >50N isn't cost effective.

Solar PV makes sense in hot sunny low latitude semitropical countries where there is a huge peak in aircon demand in the mid to late afternoon. Putting solar panels on a roof also slows heat ingress by shading it as an added benefit.

They used crushed ice and salt when they wanted to freeze things. The ice stored was from frozen natural pond water so never used directly.
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On Tuesday, 8 July 2014 12:52:22 UTC+1, Martin Brown wrote:

There's always talk of new solar cells . http://www.elektor.com/news/Solar-cell-liverpool-non-toxic/
And a use for veganism too ;-)
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On 08/07/2014 12:52, Martin Brown wrote:

Ah, you mean places like Hawaii.
<http://westhawaiitoday.com/news/local-news/solar-panel-installations-push-electric-utilities-brink
AKA
http://tinyurl.com/ojt3jaa
Andy
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On 08/07/2014 11:17, newshound wrote:

...

It was more the principle of being able to hold temperatures well below ambient for months on end without power that I was alluding to. It certainly wouldn't be beyond modern technology to build freezers that were intended to be powered for only a few hours a day.
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On Tuesday, 8 July 2014 15:08:48 UTC+1, Nightjar wrote:

I think I have one of those in the kitchen. :-)
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Yes I appreciate that. My point was that as long as you run the system at freezing point it is 80 times as effective as a hot water bottle (not strictly a valid sum, but I hope you see what I mean). But if you try to run it as a *freezer* by adding salt, you use up the latent heat much more quickly.
Going back to TNP's point, I wonder what the planners would make of an application claiming that 3 metres of stone met the required U value.
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On 10/07/2014 22:36, newshound wrote: ...

Easy enough to demonstrate. Running 3 metres of stone through one of the online u-value calculators gives a value of 0.40 W/m^2K.
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