14:10 for those who can't find 5 cascaded peltier module. Ready made 3stage peltier module costs 191USD https://www.digikey.jp/short/d0qvwn3v

You have gotten on a path you cannot leave now. You must keep going. More peltiers, more cooling, more heatsinks, more power.

Using a water drop to glue the thermocouple to the Peltier is absolutely genius!

Back in the days of the Athlon XP (CPU from AMD), I cooled my CPU with the help of a Peltier element. It had an output of 40 watts. If I connected the 5 volt line and cooled it with a conventional CPU cooler at the time, I could freeze water from the air into ice. I then built the Peltier element not between the CPU and the cooler, but between the cooling block and the fan with the hot side facing the fan. Surprisingly, this worked. The cooling block was also cooled, although the warm side of the Peltier element was only cooled by the air flow. Greetings from DE

His other channel is ICHIKEN ENGINEERING and it’s in his original Japanese but with English CC subtitles. Don’t miss it! 👍🏻👍🏻👍🏻 way way way more videos!

I had the idea some years ago but decided it would be so inefficient as to not be worthwhile. I had only considered stacking modules of equal power. Using increasingly larger modules makes sense as each module has to get rid of all the pumped heat as well as the waste heat from everything above it. Good experiment. Well done.

0:21 i m a beginner..... proceeds to make a cryo-chamber.....😂

I appreciate channels where they dub them for new audience. This was a super interesting video and kinda got me interested in these things again even with their inefficiency.

Nothing like a cooler that needs a cooler. Neat idea

I have no reason to be watching this.. but its freaking cool. As a kid back in the 90's i came across my first peltier cooler. It was inside a coleman cooler... I was amazed that no freon was needed or moving parts other than a fan. I then wondered why it wasnt used in hone AC as it was so green then my neighbor who repairs AC systems told me "They are efficient enough" Now I really see it.. 10 amps for this little setup here... My window AC ises 1/5 of that.

It does not matter what this can be used for. Your post is fantastic and very well done congratulations young man wish there were more people like you. Well Done!

For sub-zero temperatures us Apiezon N Grease or Indium foil - normal thermal paste is not meant to conduct heat at such low temperatures.

0:54 I feel like this is two videos in one! In both English and Japanese! Love it, especially having the Japanese and English side-by-side as seen on the whiteboard!

ive always wondered if you could stack peltier modules. This was really awesome to watch. Thanks! liked and subscribed. I'd love to see more!!!

Interesting and calm. A much more silent way of achieving low temperatures than with Ranque generator. Edit: it is called Vortex tube in english. ボルテックスチューブ I left my comment for the YT algorithm 😅

Amazing! I’ve been experimenting with Peltier coolers for CPU overclocking for nearly 25 years on my own. Never thought to stack them. Just a tip, setup a PWM loop next time to find the optimal temps, or run a few data points through machine learning AI instead. Both will save you SIGNIFICANT time in this day and age. 👍

I have an idea. Bring a isolated salt water tank to -20°C with a heat pump in order to defrost a 300l ice storage tank in the house. The salt water tank is placed at a height of 2 meters. A petit element is inserted at the bottom between the tank and the base plate. This allows heat from the environment to flow into the ice tank. The humidity in the air condenses and freezes. By briefly switching on Petir elements, the condensate dissolves. And after switching off, an ice crust builds up again. This allows you to charge an ice storage tank quite efficiently.

I enjoyed the video and the helpful descriptions! Thank you for the audio translation.

For my Final Year Engineering project we tried to make a Air-Conditioner for Auto-Rickshaws (it is a means of public transport in India that carries 3-4 people at a time). Our aim was to make the limited ambient space (roughly 3-3.5 cubic meter) to cool down to about 24 degree Celsius. We were extremely limited by our budget, material and guidance available that time. After watching your video, I understand that we could have done a much better job. Great work!

Some foam insulation is much less efficient at lower temps. In the US(maybe other places too) the standard used to measure the insulation is at around 25c. I don't remember the specifics as I looked into this years ago when I was selecting insulation for a project. Some foams are very poor insulators at freezing temps others get a little better. No clue at -30c and below.