I have been doing a lot of research on the Internet lately about desalination processes and desalination plants and this led me to studying mountain weather and the orographic effect or orographic lifting.
The thought then occurred to me about whether a lot of fresh water could be produced by creating an artificially-produced orographic effect by pumping warm, humid coastal air through a pipeline that would lead to the top of a coastal mountain.
I then made a conceptual drawing in MS Paint on how this could be done:
The temperature of the metal pipe will decrease as it ascends up the coastal mountain and this colder metal should cause the water vapor within the pumped air to condense on the inner wall of the pipeline forming water droplets. These water droplets will then be pulled down by gravity and should fall into a pipe leading to a water storage tank.
In the case that one air pumping plant cannot produce enough air pressure to push the air all the way up a mountain, then perhaps another air pumping plant would need to be stationed at the top of the mountain to assist with transporting the air upwards through the pipeline.
These air pumping plants would need to have a large volume industrial centrifugal blower fan like the ones built by Elektror Airsystems pictured here:
I am neither a climatologist nor a physicist so I really don't how much fresh water could be produced this way. I am looking for someone in Physics.SE to give me just a ballpark figure of how much water would be produced by this process on any given day.
Say that the pipeline is 8 feet in diameter, the top of the mountain is 8,000 ft high, the air temperature at the top of the mountain is 45 degrees, the coastal air temperature is 84 degrees, and the coastal air humidity is 70%.
Would pumping warm humid air through a pipeline up to the top of a mountain produce a lot of fresh water?