View single post by RegUS_PatOff
 Posted: Sun Mar 2nd, 2008 09:30 pm
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Joined: Sat Sep 24th, 2005
Location: Milwaukee, Wisconsin USA
Posts: 16509
himeros wrote: I seem to get about 2.0 to 1.8 amps at the compressor during run cycle, on most of the 15 to 20 cu' boxes I have check lately, hardly ever below 1.6 amps. 

1 kilowatt hour of electricity
3413 British thermal units (Btu

By this conversion 264 watts of power for a 900 btu compressor at 100 percent efficiency would mean 2.29 amps per hours at 115 volts.  What am I doing wrong with this thinking?

refrigeration compressors are more efficient:

consider an air conditioner EER ratio

How is EER calculated?
The EER of an air conditioner is its British Thermal Units (BTU) rating over its wattage. For instance, if a 10,000-BTU air conditioner consumes 900 watts, its EER is 11 (10,000 BTU/900 watts). A higher EER means that the air conditioner is more efficient.

in your sample above:

if your fridge draws 1.6a @ 120v = 192w

900btu/192w = EER 4.7

1 kilowatt hour of electricity = 3413 British thermal units (Btus) = EER 3.143

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