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Originally Posted by LPorc
Not sure about impeller idea, seems overly complicated to a droplet barrier. All you need is a simple barrier where the air doesn't travel a straight line. The droplets don't make the corner. Several folks have suggested for Evaps that opposed angle vents work:
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I'd imagine something like a thin scrubby pad would work.
Maybe even a couple of screens with a gap between would do the trick, slowing the droplets a bit.
Anything else with fans starts messing with your airflow, and the results would have to be experimentally determined.
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See what you mean. I'm a bit worried about the mist passing through the rad before its had a chance to evaporate/cool.
In my test setup the mist had a long way to travel/time to evaporate. (through a 120mm 230V fan!)
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Originally Posted by LPorc
As for condensation, the worry is not with how cool you get, we know you can't get below dew point. The worry is how much water vapor is in the exhaust and its temperature. Saturation is a nisnomer, there is no magic capacity of air to hold water vapor that varies with temperature of the air. Water vapor act like any other gas..
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I thought that the hotter air was the more vapour it could hold: Cool it (the air)down and the vapour condenses out??
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Originally Posted by LPorc
It all has to do with the temperature of the water vapor and its equlibrium of evaporation and condensation. Think of your exhaust water vapor and the ambient water vapor. If your exhaust water vapor were warmer than ambient, it would be quickly cooled. Since it is cooler than ambient it is quickly warmed. Under which condition, rapid heating or rapid cooling, is the equilibrium of condensation and evaporation likely to swing towards condensation?
Note that you can exceed 100% relative humidity with your setup. Relative humidity has to do with still air flat surface boundary conditions, not the actual amount of water vapor that the air can "hold". Water vapor is a gas and behaves like any other gas, having its own independent pressure.
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Do you have any literature/links on this? (interesting)
