Limited cooling space

[Ken Kelly]

Frederic,
	I think you are missing a point. If you divide the radiator
into thirds then the water has to flow three times as fast
in each tube to maintain the flow rate. Therefore the time
the water remains in the radiator is the same in both cases.

	Ken 

Frederic Breitwieser wrote:
> 
> > The way I see it, the coolant now "sees" a radiator that is 1/3 as high and
> > 3 times longer.  Why does this cool better than normal.  The log delta T is
> > the same, no?  Is it a flow turbulence thing?  That is the only change I
> > see.
> 
> Here would be my <cough> guess...
> 
> If you increase the width of the radiator, the coolant has to move
> further to reach the other side and be sucked back into the system,
> therefore its exposed to the ambient (and hopefully cooler) air
> temperature, which reduces the temperature of the coolant going back
> in.
> 
> While my dilbert-cube-mates think I'm insane, I just tried something
> that you can do that will illustrate the point.
> 
> Run the hot water on your faucet for a few minutes, until the
> temperature is constant.  Stick a thermometer into a coffee mug, then
> fill it with hot water.  Record temperature.
> 
> Then, using a second thermometer, or cool off the first one to room
> temperature, repeat the experiment, however use the hose with the
> spray gun, which typically has 5-6 feet of hose under it.  The
> temperature in the mug is consistantly 5-6 degrees colder.  I did this
> 3 times to make sure.
> 
> Longer hose, more distance traveled, more energy (heat) lost or
> radiated into "space".
> 
> --
> 
> Frederic Breitwieser
> Bridgeport CT 06606
> 
> 1993 Supercharged Lincoln Continental
> 1989 HWMMV w/turbocharged 500cid Caddy
> 1975 Dodge D200 Club Cab soon to have 431 stroker + turbos
> 2000 (I hope) Buick GTP (Mid-Engined Sports Car)