[ausev] AusEV Digest, Vol 7, Issue 43

[Charles Birkhead]

Expect an electric drive a/c to need ~1kw.  An a/c for a small vehicle
is ~6000 btu, or the equivalent to melting ~42lbs/hr ice (frozen water
to liquid @ 32 deg F).  The specific heat of water (liquid) is ~1btu/lb.
This same quantity of water will absorb ~840 btu for a temp rise from 32
to 52 deg F.  
 
The cooled air from the a/c needs to be ~60 deg (dry bulb) and ~45 deg
(wet bulb) to 'feel' a significant cooling effect.  See how many people
in the area have swamp coolers in their homes.  This will determine
whether ice/chilled water is viable. 
 

	-----Original Message-----
	From: ausev-bounces at austinev.org
[mailto:ausev-bounces at austinev.org] On Behalf Of Richard Slatin, MC/MFCT
	Sent: Wednesday, August 23, 2006 8:45 PM
	To: ausev at austinev.org
	Subject: Re: [ausev] AusEV Digest, Vol 7, Issue 43
	
	
	Ok, let's say one installs a conventional a/c auto system in an
EV, but with the electric compressor.  Remember, if you drive in the
summer, it will be for an hour or two.  How much will an electric a/c
system impact the range of the vehicle?  20%?  30?  A compressor is a
compressor---with a big appetite for power.  That's why I'm considering
the chilled water system, much as a pain restockig it with ice may be.
Minimal amp draw.
	
	Richard
	
	
	
	
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		   1. Re: electric a/c system (Maria Reyes)
		   2. PLEASE REMOVE ME FROM THE MAILING LIST (Curtis
Young)
		   3. Re: !12-Volt Ice cooling with a Icester by Swampy.
(tomsmail)
		   4. Re: PET battery strapping (Erik Bigelow)
		   5. 2/0 welding cable anyone? (Erik Bigelow)
		   6. Re: Little Car (Erik Bigelow)
		
		
	
----------------------------------------------------------------------
		
		Message: 1
		Date: Wed, 23 Aug 2006 17:07:13 -0500
		From: "Maria Reyes" <cheyennebabe at gmail.com>
<mailto:cheyennebabe at gmail.com> 
		Subject: Re: [ausev] electric a/c system
		To: "AustinEV News Announcements and General Discussion"
			<ausev at austinev.org> <mailto:ausev at austinev.org>

		Message-ID:
	
<9305b3ec0608231507s40327936o73887b81d982eb0f at mail.gmail.com>
<mailto:9305b3ec0608231507s40327936o73887b81d982eb0f at mail.gmail.com> 
		Content-Type: text/plain; charset="iso-8859-1"
		
		Welcome to the group, Joey. I read all the emails that
come through my
		inbox...I am still to shy to actually reply to any, but
I do read alot about
		EVs. Like I was saying...welcome here.
		Maria
		
		
		On 8/23/06, Joey Carroll <joey.carroll at gmail.com>
<mailto:joey.carroll at gmail.com>  wrote:
		  

			Hi everyone,
			New guy here. No EV yet, but im looking at
converting an 84 CRX, and I had
			some input on the 12v Aircon systems. I'm not
sure if anyone has seen this
			story before, its about how 2 teenagers made a
compressor free air
			conditioner using peltier thermoelectric chips.
I know they aer terribly
			inefficient compared to phase change cooling,
but I think there is some
			potential there. I recently got 2 of these chips
off ebay for around $16,
			just to play around with, I'll bring them to the
next open garage or meet if
			anyone wants to check them out.
			link:
http://www.treehugger.com/files/2005/07/teens_invent_fr.php
			
			
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