Date: Mon, 28 Jul 2003 19:25:06 -0600
Reply-To: tom ring <taring@TARING.ORG>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: tom ring <taring@TARING.ORG>
Organization: Tippen Ringware
Subject: (Fwd) Re: Help With 110 Volt A/C BTU Requirement Sought
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Well, a 1500 watt heater will keep my van at 70F at the top of the fridge with
the top popped with a 20F outside temp. 65 with 5 below and 40 mph wind and
the top down during a blizzard. I think it actually does a bit better than
that, but let's be conservative. 1500 watts is 5100 BTU. Given that warmer
air rises, and cooler air sinks, you should have a bit of an advantage with
less heat gain in the summer vs more heat loss in the winter due to the pop
top. Roll in the humid air that you are squeezing the water out of will
account for some cooling you won't see, and let's say the SWAG is a wash.
So back of the envelope estimate says, if you're in the shade with the top
popped, you should be able to be able to cool to about 50 below ambient with a
5000 BTU AC. Which should draw about 500 watts with a 10.0 EER. 3000 BTU
might be good enough.
The 85 in the sun, I can't estimate. Depends a lot on on how much your paint
color absorbs infrared, sun angle, curtains, etc. Park the right direction,
and you help things a lot.
tom
On 28 Jul 2003 at 19:13, Derek Drew wrote:
> Has anyone actually calculated or experienced how many BTUs are required to
> make a Westfalia 70 degrees inside via a 110 volt connection to an air
> conditioner at say, the average of 100 degrees in the shade or 85 degrees in
> the sun? This would be with the poptop up and some air leakage through the
> canvass.
>
> I would like the option to bring along a 110 volt air conditioner for temporary
> installation in the luggage rack for use while camping, and if I could solve
> this soon it will save some hotel bills which add up fast.
>
> There was some list discussion about tiny 110 volt units at Home Depot so now I
> have acquired an interest in a tiny 110 volt A/C unit but not sure how tiny is
> too tiny. I figured that the tiniest unit made would be good, but don't know
> where to get such a unit or who has looked into this.
>
> Please report to us if you have conducted such research.
>
> This is for use when the motor is off.
> _______________________________________________
> Derek Drew
> CEO & Co-Founder
> ConsumerSearch, Inc.
> New York, NY & Washington DC
> derekdrew@rcn.com
> 202-966-7907
> (cell) 703-408-1532
>
> http://www.ConsumerSearch.com/
> Time Magazine, June 19, 2003
> "50 Best Websites"
>
>
------
Tom Ring K0TAR, ex-WA2PHW EN34hx
85 Westphalia GL Albert
96 Jetta GL The Intimidator
taring@taring.org
"It is better to go into a turn slow, and come out fast, than to go into a turn
fast
and come out dead." Stirling Moss
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