Ground source cooling doesn’t really work in the long term. That was the problem with schemes like Waterseeker that depended on cooling vast volumes of air to below the dew point to condense the water. (Not just paying the phase change bill.): Dry dirt doesn’t conduct heat well, and it isn’t long before they saturate their heat sink.
Hm. The volume of air containing 13L of water is probably another set of numbers to check. They’d have to run at least that much air past the gel, probably much more because it’s not going to grab every passing water molecule. Does it need an intake blower?
