> In a message dated 96-06-15 20:14:17 EDT, Steve Laifman writes:
>
> >> I suggest that a variable resistor (rheostat) in series with the
motor
> the voltage and turning it to HEAT. There are electronic means of
> doing this, but simply turning it off when it isn't required is a
> simpler solution. All modern cars (post 1968) have had such
devices,
> Your local Rocket Scientist,
>
> Steve Laifman
>
> Steve:
>
> You are missing the point, I think. The problem here is that the
flow rate
> of the water pump is too high and the coolant has insufficient time
in the
> radiator for heat transference. The introduction of a rheostat was
suggested
> as a means to slow the pump, allowing (assuming a simple circuit)
the water
> to remain in contact with the radiator for a longer period.
>
> Rick
>
>
A few months back there was an extended discussion on the british-cars
list about whether or not is was possible for coolant flow to be too
high to allow sufficient time for it to be cooled in the radiator. If
I
recall, there where all kinds of thermodynamic arguments both ways,
with
the final consensus (I think) being that it wasn't possible.
As I recall, the flat-head Ford V-8 had a problem with cooling as the
water
did go through the radiator too fast for efficient heat exchange and by
adding
a restriction the engine ran cooler..
I tried this on my Mk 1A heater core and found I had more heat by
reducing the
heater valve opening on cold days than I did running wide open!!!
mBrad
|