In a message dated 97-08-27 16:39:06 EDT, gardner@lwcomm.com (Scott Gardner)
writes:
> So unless some
> kind of inverter/transformer setup is involved to raise the voltge
> and drop the amps, ...
Scott:
This won't help! The governing equation for an inverter is [power out equals
power in minus losses]. Ignoring losses for simplicity sake, for 3000 watts
out, you must have 3000 watts in, which is right back to 250 amps. i.e. 12V X
250A = 120V X 25A.
Evidently, the electrically driven A/C units are efficient enough that they
consume around 1/2 horsepower or less, which is the equivalent of 31 amps - a
much more reasonable number. From this, I would assume that the mechanical
driven compressors have about the same efficiency, and would drain about 1/2
HP or less from the engine. If so, I'm impressed!
Dan Masters,
Alcoa, TN
'71 TR6---------3000mile/year driver, fully restored
'71 TR6---------undergoing full restoration and Ford 5.0 V8 insertion - see:
http://www.sky.net/~boballen/mg/Masters/
'74 MGBGT---3000mile/year driver, original condition
'68 MGBGT---organ donor for the '74
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