[time-nuts] Practical considerations making a lab standard with an LTE lite
Dr. David Kirkby (Kirkby Microwave Ltd)
drkirkby at kirkbymicrowave.co.uk
Sun Nov 23 12:59:36 EST 2014
On 23 Nov 2014 17:49, "Poul-Henning Kamp" <phk at phk.freebsd.dk> wrote:
> In message <
CANX10hB0KdrnaAYzGvM1gkDUJ7gkLth0AcdxCZG894hxbUScFQ at mail.gmail.com>
> , "Dr. David Kirkby (Kirkby Microwave Ltd)" writes:
> >He installs ground source
> >heat pumps for the geothermal energy. He says that they actually work
> >quite poorly in many cases.
> There is a BIG difference between geothermal and ground heating.
> Geothermal means you drill at least 50m (Iceland) or more likely
> half a kilometer down, in order to harvest water at near boiling
> point from the Earths geological heat-sources (mostly uranium decay).
Sorry. What he installs is pipes in the ground in residential or
industrial sites. Basically he says they work initially, but performance
drops dramatically over a couple of years.
> If you extract more energy than you deposit sunshine, you end
> up freezing a larger and larger volume of water/soil around
> the pipe and your compressor will eat a lot of electricity.
That is what he was saying.
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