Electronics > Projects, Designs, and Technical Stuff
Poor man's Thermal Chamber, meat packing box II
joeqsmith:
I started out temperature testing using a cardboard box, some foam and a few resistors for a heat source. We had some meat shipped to us that came in a nice box which I decided would work better than what I had.
When I started testing meters, I decided to add a Peltier cooler to meat packing box, along with a camera so I could monitor what the meters were doing. This has worked alright but the Peltier I had was fairly small and it took several hours for the box to reach 0C. Getting below that was a gamble. I was able to get it down to -15C with the windows open during the Winter. You can see a few pictures of it here:
https://www.eevblog.com/forum/testgear/hear-kitty-kitty-kitty-nope-not-that-kind-of-cat/msg1371562/#msg1371562
You can also see it in several videos like this one:
https://youtu.be/uY6ZcINF7L0?list=PLZSS2ajxhiQBvWvqMVLdRQMjGofKpQUJr&t=3182
joeqsmith:
A few days ago, I started looking at changing the box once again. The goal is to improve the ramp times and be able to reach -10C. To do this, I had wanted to go to a higher power Peltier along with 2-stages. I tried stacking a couple of them on the bench and it seemed like it may work.
joeqsmith:
Another test showing the open air loading. The current is 13.64A and the voltage is 8.01V. Roughly 110Watts. The TECs can run up to 14.5V absolute max but it would dissipate roughly 400W. The ambient side heatsink I am using would need to be much larger.
MosherIV:
Hey Joe.
Have you seen Dave's video on converting a fridge into a thermal chamber?
He used a fridge with Peltier type heat exchanger, so that it could work both as a cooler or heater.
Might be easier than re-inventing a thermal chamber ;)
joeqsmith:
--- Quote from: MosherIV on June 02, 2019, 07:08:47 pm ---Hey Joe.
Have you seen Dave's video on converting a fridge into a thermal chamber?
He used a fridge with Peltier type heat exchanger, so that it could work both as a cooler or heater.
Might be easier than re-inventing a thermal chamber ;)
--- End quote ---
In my first post, where I provided a link showing my last attempt Dave posted about his temperature chamber. My goals are a bit different.
https://www.eevblog.com/forum/testgear/hear-kitty-kitty-kitty-nope-not-that-kind-of-cat/msg1371764/#msg1371764
Navigation
[0] Message Index
[#] Next page
Go to full version