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Message
Bear in mind that the cores were designed for
coolant evaporation, not for water flow heat transfer. It sounds like they had a
design that put the liquid coolant in the bottom of the evaporator, and then
relied on percolation, i.e. letting the fluid boil in the core, with the
bubbles forcing the liquid around and up the core to the exit.
Evaporators (2-phase heat transfer) are more
efficient in a 'flooded' mode, so by having the plate in the header tank, the
liquid could flow into the bottom of the core, absorb heat, a bubble form and be
forced along one of the tubes until it reaches a riser in the header tank, then
out through the top 2". This would work great for a air-conditioning core, but
not for our use.
My cores were mounted (in the car) with one header
tank down where the liquid was fed, and the other header tank up where the vapor
was withdrawn. If his were mounted with both tubes up (in the car), then the
explanation above makes sense.
In any case, you need a direct shot from top to
bottom in both header tanks in our use as water coolers.
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
Sent: Monday, September 06, 2004 8:35
PM
Subject: [FlyRotary] Re: Water pump
problem
No. It had one tube in each of the
tanks. Both in the top. One tank is blocked off by a
plate about 2” down from the top.
The other tank originally had a tube in it internally that extended to
within an inch or so of the bottom.
Does
that make sense ?
I must be misunderstanding something,
because I don't see how the original configuration could have been using the
whole core in the car. Let's forget that for now though.
You should now have a tube in each
tank. Both tanks should be open from top to bottom, meaning that you'd
have to have drilled a hole through the blocking plate that was installed in
the tank. If you didn't open up the blocking plate, you're only
using the top two inches of the core, which would explain why that's all
that's getting hot.
To rephrase this another way, one
tube should come into the top of one tank. The liquid running into the
tank should be able to go through every one of the flat tubes that join the
tank. The liquid should be able to come out every one of those flat
tubes in the other tank, and go up and out through the outlet tube.
Is that what you have now?
If the above wasn't clear, I'm
afraid we're going to have to resort to drawings
:-)
Cheers,
Rusty (glad the South FL boys
survived)
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