Beaver who imagines a house without soil or electricity. You have to get out of the water.
So before spouting the same bullshit for years already learn the vocabulary of construction because "covered enclosure" which has not been used for years means out of water out of air, so without the finishing work
Then put a piece of aluminum in the fire comes out. Your hand will stay stuck, it's so hot. And yes there are thermal transfers by conduction.
You still haven't put in a plan, nor the thermal study, so we conclude that it's still a barrel.
So do as I go in the water with a little luck it will wash you of your bleak ignorance .... but I'm afraid that the river does not have enough flow because there is work.
I guess you don't have a photo of your prototype, for the simple reason that it doesn't exist.
crook