So what was Andy doing in this picture? Checking the temperatures of the top and bottom of the back of the heat-absorbing wall, and of the air temperatures in the air space behind the wall.
This is what the electronics inside the box look like.
Each of the four spots he’s interested in have thermistors, whose resistance varies with temperature. The electronics convert those resistances to temperatures he can read on the display.
Why is he interested? Notice in the first picture there are fans at the top of the wall… they blow air from the greenhouse into the air space behind the wall. On sunny days the air in the greenhouse is hot, so the flowing air heats up the back of the wall. At night the air in the back of the wall is warmer than the air in the greenhouse, so the stored energy in the back of the wall warms the flowing air. That air comes through ducts in the bottom of the wall and warms the greenhouse. (The front of the wall is painted black so it absorbs energy from the sun during the day and radiates it back into the greenhouse at night.)
Neat toy, right? What do you play with?
December 22, 2020
Huh?
😀
That all looks very complicated to me, but I am sure Andy knows exactly what he is doing Right now, jigsaw puzzles and all the different word and number puzzles in the paper keep me pretty busy.
It’s the same idea, anything that absorbs us and enriches our lives.
It is a neat toy. Had you guys seen one like this somewhere or had you just read about them? Inquiring minds want to know.
I play with needles…hand and sewing machine…and fabric. And computer/pics/blogging.
It was Andy’s idea to have the air space behind the wall, the duct fans, and the electronics. We were happy it worked so well.
Hobbies are wonderful things, whatever form they take.
I so agree about hobbies…I have heard so many people say they would be bored to death if they didn’t work…I have never suffered with boredom. There is always something I want to do or read or see.
Same here!
Whoa! This makes me wish I’d paid more attention while in school. Meanwhile, I’m happy to play with my pups, aka the ‘lady girls.’
It doesn’t matter what it is, as long as it turns us on.
Wow, this looks and ounds so complex! i think I would be too stupid to have a greenhouse! I can’t think of any actual think I like to play with, except the computer. And it is WAY smarter than me!
😀
oh we of old, know what Andy loves to do – tinker, build, and service gadgets that most of us haven’t any idea how they are made or even how to unscrew the panelling that is in front of them…
I play with art and craft supplies which also includes tools – but not many screwdrivers unless I’m gluing them onto something else!
Again, it doesn’t matter what it is as long as we love it.
If you say so!
😀
I don’t know if I understand all the details but I get the purpose. Very cool. Or hot, whichever the case may be 🙂
The details don’t count, it’s the general idea.
Okay…say what?!
In laymen terms please. Like a double wall insulator? Kinda sorta?
I play with my toy all the time. It’s called a Nikon.
See tomorrow’s post. Yes, your camera is your favorite toy. 🙂
Instead of Huh? I was thinking WHAT? I am glad he understands all these gagets and it is perfect for a hobby plus you get to eat the food it grows.. if i had to understand what you just said to get food, I would starve. you already know the computer is my HOBBY…
I love seeing what you do with your camera and computer. 🙂
I do admire anyone who can understand the sort of electronics you’ve pictured there! I don’t think I’ll be getting anything similar as my toy….
I don’t understand the details either, but Andy’s had a lot of experience with electronics.