For you DIY fanatics, the answer is YES.
The University of Saskatchewan published a plan for one in the early 80's. It works; I even built one on TV. But it was hard to defrost, impossible to clean and we never did manage to get it out of the basement so it has been left there to be discovered by future archeologists, who will spend a lot of time trying to figure out what was the purpose of this monstrous pile of wood lattes and polyethylene.