On 11/02/13 15:42, Tim Streater wrote:
In article ,
"David WE Roberts" wrote:

The is an initial attraction to the idea that an air source heat pump
driven by PV electricity could be a neater solution for heating a heat
store than solar water heating panels.

Which
http://www.which.co.uk/energy/creati...des/air-source

-heat-pumps-explained/
seem to prevaricate a lot, but afen't to keen when retrofitting.

A capitalist money grabbing pig who is also a mate has a good sized PV
array which is generating well, and he is being offered an air source
heat pump to go with it.
Presumably the idea is to use the PV leccy to heat water, and using a
heat pump gets more heat per unit of electricity than feeding it
directly into an immersion heater.

Could do what the Aussies are supposedly planning: use the daytime PV to
melt salt at 500-600C, use the heat stored there for nighttime leccy
generation. Of course they are not doing that on a house by house basis,
but possibly rather more efficiently in stations that generate about
300MW each (IIRC). That goes towards removing the major stumbling block
for renewables: intermittency.

well of course it doesn't. Since the turnround efficiency of a molte
salt heat store is ******** really

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