Yes, I saw it mentioned on BBC Red Button (hooray, got it right this
time - no longer Ceefax!). A sad byproduct of the global warming
scare, the rush to renewable energy and unscrupulous business. The
same thing happens on a much bigger scale, when local councils give
planning permission for the installation of solar farms and wind
turbines. But I bet a post-installation analysis and comparison with
predictions is never done.
Sadly, there will always be those whose business model is based
The various firms I approached for quotes for my installation all
appeared to play by the rules, and used PVGIS figures for their
calculations. The only problems were those who tried to quote for
more panels than would actually fit on the roof.
Looking at my spreadsheets, the estimated output calculated
forward to current date was 25.11 MWh, and the actual performance
has been 31.65 MWh, already having paid back the initial
I gather that the official predictions have since been updated,
appearing to be more optimistic. When I have a moment, I may well
compare the results.
Chris J Dixon Nottingham UK
I think anything that can save usage of power or can, on site mean you get
some heating or power directly is all you can hope for, as anything that
relies on some external company to play fair is doomed to failure before the
end of life of the product.
This newsgroup posting comes to you directly from...
No. Of all the green shit I have analysefd a few things made sense.
Ground and to an extent air sourced heat pumps would, if run off nukes,
be cheaper than oil and comparable with gas.
More pumped storage would be worth building at a few sites in scotland,
LED bulbs were actually worth having.
"In our post-modern world, climate science is not powerful because it is
true: it is true because it is powerful."
It is not clear either that that house was being heated by an air source
heat pump (they talkked abiut heat recivery ventilation) or that it was
correctly installed. Normally on new builds there is massive insulation,
and underfloor heating - you need extremely large areas of 'radiator' to
utilise the rather low grade heat from a heat pump.
If that famiy had an inadequate heat pump output or inadequate radiator
area so they had to use immersion heating to get te temeperiures up, teh
coist will treble. Alreday hot water needs to be boosted to 60C as that
is generally outside the limits of an air sourced pump
I repeat. done *properly* heat pumps should be similar in cost to gas.
I nearly put in ground source here but I would have needed far more
pipes in the UFH downstairs and it would have been impossible to utilise
teh existing upstairs heating at all.
"Nature does not give up the winter because people dislike the cold."
On 09/09/2019 13:21, The Natural Philosopher wrote:
Is this the nuclear electricity too cheap to meter?
Air sourced may only be sensible if you want domestic air conditioning
to get a cooler house in summer. However this could mean that an average
household will will be using more electricity than currently being
consumed. The system becomes much less efficient during the winter
months and running costs barely break even compared to gas or oil. Maybe
they will short term with the 7 year early adopter subsidy which is not
guaranteed if demand exceeds the money allocated. This assumes that you
have well insulated house and possibly replace an existing CH system.
Ground sourced can be viable but this costs more and care has to be
taken with the design of the installation, as some local councils have
found when implemented on some of their estates.
What the greenwash companies are pushing (mis-selling) is retro fitting
air sourced heat pumps to existing CH systems that are unlikely to to
have the savings claimed over other sources of heating, more so after
the subsidies end.
When the Greens come to power in the next general election we will end
up with more wind turbines and solar panel farms which will need to
supply a lot more electricity to power all of our CH and electric cars
as conventional fuels will be banned after 2025 in our zero carbon
society. No domestic gas or oil and with more expensive electricity and
then air sourced heat pumps fitted to your home will become cost effective.
My exes late dad bought some water heating panels on thee basis they
would 'halve the cost of heating'.
When I pointed out to him that the brochure said 'halve the cost of
heating his hot water' and never mentioned the house heating at all, he
refused to believe me.
The lifetime of any political organisation is about three years before
its been subverted by the people it tried to warn you about.
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