yes. it will increase the surface area. when I did this, I used zip ties at teh top and bottom, and had my cloth hanging from a circle (2" pvc pipe cut 1" long, at both top and bottom). created a sort of tube - had 'circles' at top and bottom. gave about the same performance as the horizontal type of volenti cooler.
re. horizontal space for air flow -= with a horizontal volenti style rig (aka naja style rig) you really dont need a lot of air flow directly on the cloth. I found that temps with no fan were very close to temps with fan. The only noise from the rig at all was teh power supply fan and the hum from a d4 pump. Most of these experiments were posted in the bong lovers club thread and also in naja's thread stickies. I had a couple build threads but do not think any of the pictures are still up. I did not bother wtih pics of the horizontal rig or the tube in the tower rig. I don't think there are many pics up anymore.
It is a shame that DirtyDuck stopped posting. The main bong thread in water cooling section pretty much died when he left. Most of the posts in the water cooling section now seem to be driven by how the rig looks, not by how it performs.
Perhaps it is better to have evaporative cooling thread in this section.Edited by nub - 2/27/12 at 2:13pm