one sugestion to increase efficency, is to use somthing other than egg crate to creat a multi teared spill over (same idea that they use in the big cooling towers for refinerys) I don't think you could add it to yours as it might take a different configuration for air flow. The problem I see in your design is the water flows to the bottom unrestricted and quickly so I do't think you'll get much more cooling out of it. I have been playing around with this for a while trying to come up with a set up that is quiet enough to be in the same room as the tank.

basicly you have the water spilling over the sides and they are kinda stepped but instead of 90 degree steps it is like little "v"s so it fills up them spills into the one below and so one.. then the air blows upward in the oposit direction to create a counter flow open loop type design to minimize the foot print.

Steve

pics? Extra contact time would definitely help

I'll see what I can come up with for a pic. everything has been stuffed in dark corners and packed away sence I took down my big tank.

basicly you need to use a spary nozzel to put the water in at the top, then have a series of trays, to catch, fill up and over flow, while sucking air from the bottom to the top.. trick is being able to make it not leak haha.

I have been looking for something better to make the louvers, or make them my self but haven't found anything I am happy with yet.

Steve

Number one rule in engineering is keeping things as simple as possible, your design is starting to sound pretty complicated for what's required, but I'm still interested and would like to see pics or a diagram if possible.