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[Spridgets] Thermal dynamics question (No LBC Content)

Subject: [Spridgets] Thermal dynamics question (No LBC Content)
From: refisk at chartermi.net (Rick Fisk)
Date: Wed, 19 Jan 2011 16:18:33 -0500
References: <mailman.6301.1295401122.23296.spridgets@autox.team.net> <827B8F2CD6834ACF8BAA5610277A7B0C@OfficePC>
Bob,

Moving the air the way you describe will help.  But a $50 ceiling fan will 
do a better job.

Rick

----- Original Message ----- 
From: "Bob Gardner" <rdgard at cox.net>
To: <spridgets at autox.team.net>
Sent: Tuesday, January 18, 2011 10:17 PM
Subject: [Spridgets] Thermal dynamics question (No LBC Content)


> NO LBC CONTENT!
>
> Hi all,
>
> I know that a lot of the people on this list are much smarter than I am on
> many different topics.  Several times I have asked a question and gotten
> great answers that I would not have thought of.
>
> So here is my situation and followed by my question.
>
> When it gets chilly here at night in the winter (don't tell me how much
> colder it is where you are, ok?) I sometimes turn on the heater and it 
> gets
> plenty warm up at the ceiling and still chilly half down the room and 
> worse
> on the floor.  Ok, we all know heat goes up.
>
> So My big idea is to build a small square tube (about 6 inches square) and
> put a small silent computer fan in it.  I have an area next to a book case
> that if I paint it the wall color, you would never notice it. (Here is 
> where
> I need your advice.)  I want to take the cold air from the floor and push 
> it
> up the tube and exit it at the top so it will start a movement of air,
> pulling the cold air from the floor and warming it up at the ceiling,
> creating a more even temp distribution in the room.
>
> OR
>
> Should I suck the hot air from the ceiling and exit it on the floor level,
> heating up the cold air on the floor.  Or does it matter if the air 
> movement
> goes up or down?
>
> These little fans move about 100 cu ft/min of air.  If I put two fans, one
> at the bottom and one at the top would it increase the air flow or just 
> make
> one of them work harder and/or make more noise.  I know if I put them in
> parallel it would push twice as much air, but in series would it make any
> difference?
>
> Thanks in advance for your good advice and your slings and arrows about my
> freezing 56 degree winter here in San Diego.
>
> Cheers,
>
> Bob

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