Just looked at that thread and it confirms that we both have a very similar project plan. My idea involves using 10 (so far) 136.8w peltiers with the specs I gave you and i was thinking of air cooling the hot side with the cheapest cpu coolers I could find (potential weak link).
So far the peltiers have set me back Â£17 and the heatsinks are looking to be about Â£20 (ones im currently looking at
). I was going to use some large low speed fans and a make a shroud.
Your idea of having the water directly on the peltier faces is interesting. I agree that the peltiers will have quite a large surface area and I was thinking on a simple maze with very high flow and low restriction.
However I was thinking of using a copper plate in between. This will make mouting everything easier and ive read that peltiers need a high pressure to perform well (not sure if this applies when theres no thermal interface like in your idea).