RE: Air conditioning question

["Avi Meron" <avi@cosmoslink.net>]

No dice Mike,
An AC comp. takes about 3-6 BHP, piston compressor more than rotary
compressor and variable compressors "obviously" vary in load depend on
demand. A variable compressor can have a displacement of 14CC in minimum
stroke and 170CC at max stroke.

As for using electricity for running an AC compressor lets look at the math:
Your compressor needs 5 BHP (a guess)
1 BHP app. 750 Watt
5 BHP times 750 Watt =  3750 Watt
3750 Watt divided by 13Volt= 288AMP
You will need an alt. of 288AMP which will use (guessing) more BHP than an
AC compressor

Not a good idea, especially when you can use a variable displacement comp.
which is very efficient.

Avi


-----Original Message-----
From:	owner-quattro@audifans.com [mailto:owner-quattro@audifans.com] On
Behalf Of Mike Arman
Sent:	Saturday, July 10, 1999 10:30 AM
To:	quattro@audifans.com
Subject:	Air conditioning question

How many Hp does the a/c take on a 5000? Anyone know the rating or the #of
BTUs the unit is rated at? Anyone have any general information on this?

Thought came to me today about powering air conditioner compressors - all
the car makers do it from the crankshaft - with all the attendant belt
problems, miserable access, flex hoses from the wiggling engine to the rest
of the unit, and they are a PITA to fix and keep running.

Alternators can be easily rewired to give 110 volts - suppose we put an
auxiliary (second, dedicated) alternator where the a/c compressor currently
lives, and use the electricity (110 volts, at say, 6 or 7 amps) to drive a
household style sealed A/c compressor, mounted with rubber mounts on the
chassis - eliminates uneven engine drag, eliminates most rubber flex hoses.
Even a separate electric motor driving the standard automotive compressor
would be an improvement. And of course, you could mount this
motor/compressor unit almost anywhere you wanted instead of making it share
the crowded and hot real estate under the hood.

Any thoughts on this?

Best Regards,

Mike Arman