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Article #9270

Re: Best Buy Treated Me Like a Thief

#9270
From: Keith Williams
Date: Tue, 10 Jan 2006 19:18
25 lines
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In article <43c3fd7a$0$319$8046368a@newsreader.iphouse.net>, 
veldy71@yahoo.com says...
> In mn.general Keith Williams <krw@att.bizzzz> wrote:
> >>  
> > Yep.  At -20F my car's "contrails" never go away.  OTOH, at -30F 
> > they usually do.  ;-)
> > 
> 
> If you are telling the truth [rather than joking around] then you have
> an issue with condensation within your exhaust system.  This leads to
> liquid buildup in the system if not accounted for.  I don't know how the
> exhaust system of hydrogen vehicles work, but presumably, the exhaust
> whould remain vaporous until after it leaves the exhaust system ... or
> have special drains.
> 
No kidding about the first (-20F) part.  The contrails are there at 
-20F (pretty much anytime it's below 0F), but like an aircraft they 
(visible part) start outside the tail pipe.  If the air is colder 
than the dewpoint of the exhaust there *must* be condensation. 

...only half kidding about the second (-30F).  The car usually 
doesn't run, so no contrails. ;-)  

-- 
  Keith
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From: Keith Williams <krw@att.bizzzz>
Newsgroups: misc.consumers,chi.general,mn.general
Subject: Re: Best Buy Treated Me Like a Thief
Date: Tue, 10 Jan 2006 14:18:45 -0500
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