Date: Wed, 27 Jun 2007 08:21:12 -0700
Reply-To: Michael Elliott <camping.elliott@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Michael Elliott <camping.elliott@GMAIL.COM>
Subject: Re: A/C resuscitation - where to start?
In-Reply-To: <1b85fa6a0706270715g651354adj933c74f1a87433f@mail.gmail.com>
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I expect that if your tinting lowers the inside temp by n degrees with
the A/C off, then it will lower the inside temp by n degrees when the
A/C is on. Either way, you get a n degree lowering. The big advantage
that A/C offers is that it is possible to get the inside of the car
lower than the outside air temperature. If the outside air is 100F, then
no tinting can cause the inside of a non-A/C car to go lower than 100F.
Here's the little I know about tinting:
All tinting films block UV.
No tinting = greenhouse effect big time (UV + light + short wave
infrared comes from Mr Sun, in through glass, hits upholstery and my
left arm [causing skin cancer], heats things up which means that they
are re-radiating the absorbed energy as long wave IR which does not
penetrate glass -- it stays trapped in car). Totally black tinting =
light and short wave IR and UV and other energetic packets from Mr Sun,
hits black tint, heats it, which heats the glass which re-radiates heat
into car. Wear a black t-shirt in full sun to experience this effect.
Super black "limo" tinting provides maximum privacy (what you doing that
you need so much privacy for, huh? huh?) but you get that hot glass
thing, so an oversized engine operating a hefty A/C unit is how the
passengers don't bake. Reflective metallic tinting acts like mirror,
like rubber like glue the light and IR bounce off the film and stick to
some poor schmuck pedestrian standing near the car thinking damn hot day
summer in the city. 100% mirroring would bounce 100% of light & IR. But
it would be really really dark in the car, so something between 0%
reflective tinting and 100% reflective tinting is what you gotta end up
with -- and work with what's legal, too.
--
Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
KG6RCR
Zeitgeist typed:
> Have any of you opted to tint your windows as a means of augmenting the
> heat
> dispersing effects of AC? I have an appointment next week to have the
> windows in my Mercedes wagon tinted, and if it works as well as some folks
> have indicated, I'll probably do the same for the van. Driving around in a
> big ol' greenhouse just seems sub-optimal for maintaining one's dignity
> when
> the temps run high.
>
> Casey
> __________________________________________
> '87 300TD intercooler/propane/biodiesel
> '94 100CSQ Avant
> '90 90Q
> '89 Bluestar
>
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