On Fri, 08 Aug 2003 01:35:02 +0100, Dave Ludlow in
wrote:

On 07 Aug 2003 23:36:20 GMT, (TudorHgh) wrote:

Dave,
My figure of 6.8 KWh means that over, say, an 8-hour working day it
consumes getting on for a kilowatt, but that's assuming 100% efficiency. So I
presume it uses rather more than this. Even so, that's only one bar of an
electric fire or a bit more. It would seem to be worth it if your office is
your livelihood.

Yes, it is. I bought it last weekend and couldn't have worked in here
this week without it as I need to be able to think clearly 100% of the
time (online stock trading). Target for the week: to recover the cost!

It's a small one, 5500 BTU/hour cooling capacity which I think
converts to 1.6 KW. I make it work hard, forever in and out of the
room! Power input is only 720W, I don't understand that at all.
*shakes head confusedly*

Dave - I have just found this thread and see you bemusement. I know little
about "heat pumps" but would guess that is what is happening in your case.
You get more out than you put in, as much is coming from the environment.

Here's a link that goes into more detail about them:

http://www.heatpumpcentre.org/tutorial/intro.htm

A key sentence is "A typical electrical heat pump will just need 100 kWh of
power to turn 200 kWh of freely available environmental or waste heat into
300 kWh of useful heat."

Mind you, I could be barking up the wrong tree totally:-)

--
Mike posted to uk.sci.weather 08/08/2003 08:56:47 UTC
Coleraine
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