you lost it with small. An automobile compressor is sized, depending on application, at 1 to 2 tons. Lots of glass in a car and metal conducts well also. Rapid draw down is important. A sealed compressor with 1/8 that capacity will keep your cream cool. Assuming 50% efficiency mechanical work to electricity and then electricity to mechanical work you are at 1/4 horse versus 1 or 2. Besides in most warm places there is reliable sun. photovoltaics to battery to dedicated inverter is smaller and more reliable.
My 2 cents.
Will Rogers quote: "Stupidity got us into this – why can't it get us out?"
From: John Green <v_2jgree@operamail.com>
To: electricboats@yahoogroups.com
Sent: Saturday, October 20, 2012 1:32 PM
Subject: [Electric Boats] Re: 12V Accessories (Refrigeration)
Hi, Carter,
What's your opinion (and anyone elses):
Taking the thinking of just needing a small cooler for coffee cream,
soda, cheese etc., and no freezing, could an automotive air conditioning
system be run at slow rpm using a windmill that might need to be geared
down?
It could always be set up with a 12v backup motor to turn the compressor
with the windmill de-clutched somehow.
John
3b. Re: 12V Accessories (Refrigeration)
Posted by: "Carter Quillen" [1]twowheelinguy@yahoo.com twowheelinguy
Date: Fri Oct 19, 2012 9:19 am ((PDT))
Hey, more power to you if it works and I'm sure it does.
I'm just saying, you'll get far more refrigeration effect per Watt with
vapor co
mpression than any other approach. I have an off the shelf, 11 cu. ft.
refrigera
tor freezer on the Arc that I bought for $300 and I love it. It will
most likely
run for the next 10 years without missing a beat and I'll throw it away
and buy
a new one. There is no way I could produce that luxury with either
absorbtion o
r Petier technology for anywhere near that cost or efficiecncy.
That's all I'm saying.
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