Quote:
Originally posted by unregistered
which is the specific advantage - for all TEC apps - of a wb with opposite corner connections
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Ah pimpage. LOL
Actually
if there is a benefit to the dT/Q gradient that develops at low flowrates, the benefit likely becomes substantially greater if the the chilled water flows past the two TEC's in series. Taken to it's logical conclusion 'diagonality' becomes irrelevant.
(I'm still not certain that there is an explanation for your experimental results in the dT/Q gradient alone. I have no other hypotheses though.)
Somewhat coincidentally, several at O/C forums seem to get 'good' results from chillers containing ten '50 Watt' TEC's. I haven't paid enough attention to know anything about the construction of those chillers though.
I suspect there should also be some benefit to running the hotside water counterflow to the chilled water. Have you tested this Bill?