Mike Jay wrote:So are you thinking that the insulation arch part would move as a monolithic shape to cover the south side of the greenhouse? Kind of like the buffet covers over the scrambled eggs at the continental breakfast in a hotel?
Mike Jay wrote:Yes, moveable insulation that works and is automated would probably be the biggest thing for greenhouses since sliced bread. I saw a cool greenhouse design in Michigan where they built a huge A frame greenhouse. It was something like an equilateral triangle 40 feet to a side. The whole south side was glazing. Attached to the north side was an insulated "floor" that was hinged about 8' off the ground. At night the "floor" would be lowered down until it was horizontal (8' off the ground) and reached from the south angled side to the north angled side. So basically the whole triangular portion from 8' to 30ish feet off the ground was only in use during the day as a solar collector. Then at night the pivoting insulated floor closed off most of that heat loss and they only had to deal with the losses through the 8' high south wall. I don't remember but they certainly could have had 5 wall polycarbonate glazing down low for good insulation and cheaper stuff up high for more solar gain.
It was big enough they could run a tractor in it. But it was also huge... And I don't know how they didn't cook their plants on sunny winter days...
There's a way to do it better - find it. -Edison. A better tiny ad:
September-October Homestead Skills Jamboree 2019https://permies.com/wiki/118704/permaculture-projects/September-October-Homestead-Skills-Jamboree