Rob Lineberger wrote:Again, riffing, not having had the time to look at your design...
I am concerned that cycling water between 3 outside barrels and one inside would not work. I don't think one warm barrel is enough to stave off the others freezing. But it would bleed off the stored heat in that one barrel, which removes its utility as a heat sink.
Having all four barrels inside would be a much better defense against freezing and also would be four times the thermal mass.
These are just off the cuff remarks cause I'm multitasking at the moment.
Rob Lineberger wrote:This thread is great. I'm taking inspiration from it. The only comment I have at this time is, those rain barrels inside the membrane would be a great thermal mass for temperature regulation. I didn't look closely at whether that's possible in your design. But I'm trying to incorporate water into my greenhouse plan for thermal mass and moisture.