Model engineering heat pumps
_ wrote:
On Wed, 02 Sep 2009 21:38:15 -0500, Lloyd E. Sponenburgh wrote:
Richard J Kinch fired this volley in
:
1 KWH can pump 10,000 BTU in a 10 SEER heat pump. If we equate 746
watts to 1 HP, then you get 7460 BTUs pumped with 1 HP-hour. So
pumping 50 BTUs would take 50/7460 = 0.0067 HP-hour. That's about
0.08 HP for 5 minutes. But who knows what efficiency you could build
in that size. And how thirsty you are for a cold one.
I stand corrected. I failed to account for the fact that energy moved
isn't equal to energy input.
HOWSUMEVER... I'm not sure most 'mature' guys could output nearly a
tenth of a HP for five minutes, either. But I concede the error G.
Hour-record cyclists put out something over half a KW for that hour.
75 watts for 5 minutes is more than button pushing on a remote, but not
that hard.
Everything is easy for the man that never does it.
--Winston
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