Yes, agreed if you had no power. But with power (solar cells, etc.), I want at least 1500 CFM through a 10-inch plastic pipe (for making 10-12 GPH drinking water) to run moist air at ~45MPH. Under such air speeds you don't even need a sloped pipe. You could use a horizontal pipe and need a water catcher screen at the dump-exit to catch condensed water droplets mixed with and moving with the airflow that will drip into the cistern collector.
Hi wkg4,Yes it would work, but the resultant updraft would be ~1/10 to 1/100 of what we need to generate 10 to 15 GPH of drinking water at ~10 inches of water column pressure