>
> Tracy - explain the optimal radiator plumbing.  I would think that the
hottest
> water and the coolest air would cool best, but you indicate the opposite?
>   kevin
------------------------
I'm not Tracy, but the concept is to have the biggest delta-T at all times
between the Water and the Air. So as the air is going through the core it is
warming up, and the delta-T is getting smaller.  By putting the hottest
water in the back radiator, it has the biggest delta-T to the already warmed
air. The relatively cooler water entering the front radiator sees the cooler
air just entering the radiator. Thus you get the biggest delta-T. This is
known as "counterflow" arrangement.

With parallel flow, the water is cooling off, and the air is heatingup,
therefore the delta-T is decreasing, making the exchanger less effective.

If you go this route, it will be CRITICAL that you not allow air to leak out
between the two cores, or you will lose effectiveness.

Bill schertz