Well, here it is, a new year and new thoughts about the greenhouse.
The greenhouse has a lot of problems.
The radiator/fan system can't move enough heat into and out of the tanks. This is probably for a number of reasons:
I can't turn the pump all the way up because the radiator pressure release valve pops open.
The radiator/fan is undersized.
The connection between the radiator and the fan is inefficient
I don't like the open tanks. They get full of junk. Also, the radiator contaminated them with oil/antifreeze (even though I tried really hard to clean them up.) The use up the space inside really inefficiently. And I can't really raise fish in them; if the system was working, the temperature would fluctuate too much. In any case, I probably won't be ready to raise fish for a long time. The space underneath them is good for the mice and voles to live under. Trapping mice isn't fun, and anyhow, the ants eat up all the peanut butter before I can catch any mice.
I don't like growing things in pots. They dry out/run out of nutrients really fast. Of course, there's ways around that, but still . . .
The greenhouse is full of mice and voles who eat the plants and tunnel through things.
After a greenhouse has been set up for a while, it starts to feel unhealthy and yucky inside. And of course with rodents there is a Hanta concern.
The greenhouse is overbuilt to raise greens or overwinter brassicas. It is underbuilt to grow tropicals. So it falls between two stools.
During the summer, we don't really need any heat storage; I could do better by just blowing the heat out the door, and not spending money running a pump.
Soooooo . . ..
Time to do some thinking.
What do you all think? Would a radiator like this work better? https://www.instructables.com/Free-Air-Conditioning/