My dad would've loved your channel. I know I do. He was an expert in industrial refrigeration, and I'm a software engineer with a deep interest in physics.

I really enjoy how these videos are the perfect mix of practical applications, engineering principles, and underlying science. You get a cool project plus a good base of general understanding that can be applied to lots of other projects. This is really how I think STEM education ought to be done.

Thank you sir, I learned way more than I was seeking to when I clicked on your thumbnail. This is the type of quality informational content we need more of on KZfaq.

Every time you put out a video, you fucking deliver and never disappoint. The amount of effort to produce content like this is overwhelming to even think about. You got to know your shit in so many fields of science just to keep up with all the research that's going on, then you got to produce the same results in an independent lab without any kind of funding or special access to materials and equipment, then you contribute your ideas to further explore the results and expand the applications of the fundamentals; and if that isn't enough on its own, you somehow manage to produce banger content and grow a KZfaq channel which requires filming, editing and interacting with your viewers whom you not only entertain but educate, in a way that is far more effective than any other paid institution and what absolutely does it for me is that at no point do you ask for anything in return, there is nothing behind a paid wall, I don't have to listen to ads from your sponsor, there is no merch dangled in front of me, I have no memory of whether or not you even have a Patreon. All I'm trying to say is that the value you provide and the sincerity with which you do so is unreal. Thank you for what you do, you are an absolute legend

I deeply appreciate how much you share here for free on youtube. Absolutely amazing levels of detail, clear explanations with context and a very polite manner. I'm just feeling so grateful, thank you!

10:20 Perfect explanation of the peltier and seabeck effects. I was explaining this to my kids a month ago and they've said your example with the foam was easier to understand. Thanks guys

IS ANYONE ELSE JEALOUS OF HIS HOME WORKSHOP/LAB , I SURE AM ,, AN IMPRESSIVE ENGINEER WITH GOOD COMMUNICATION SKILLS .

from about @11:25 that's the most elegant way to explain the peltier effect I've ever seen. thank you!

Hey there, Thank you so much for producing essentially timeless content. I regularly come back and watch again. I always marvel at the execution, detail and effort that has gone into this. And also the entire production & content alongside the house with the manual arts room (so to speak) is the perfect space.. . Just amazing thanks again.

Put the opening on the top and the cold air will stay in the refrigerator when it is opened.Cold air pouring out when the door is opened is the biggest loss of energy.

To get the university course version, change the speed to 1.25

Gotta love how for all of the time lapses, he just waited, motionless, partially in-frame for the whole time. From about 26:40, he idled patiently for 8 minutes, then after the temperature passed above 30, put the glove on.

One of the best tech channels on KZfaq (if not *THE* best)! I'm so glad to have found your channel. Another fantastic series. Keep up the superlative work!

Man this guy is so freaking articulate and precise when explaining things. I would have payed attention & even learned something in school if I had a teachers like him...

"For you monopole people and infinite energy people" I died 🤣

I hate peltiers. The efficiency alone made me drop them as a heat pump years ago. I would love to find a way to build a micro compressor system. Super great video as always!!! You rock. Great explanations :D

*Great explanation of refrigeration! Love the project.* ❄⛄

Straight Mad Genius! I can't wait to see the rest of this build. Love the workshop too.

Ok, for the metric people like me, R Value = (F*ft^2*hr)/BTU Our equivalent is RSI RSI= (m^2*K)/W to convert R value to RSI divide R value by 5.68 Where; F=temp in fahrenheit ft=length in feet hr=time in one hour BTU= energy to raise 1 pound of water by 1F m=length in meters K= temp in Kelvin (temp in celcius +-273.15) W= Power in Joules/second I thought this would be easy, but I just got more confused the more I researched it.

I just wanted to compliment your production, very high degree of professionalism. This makes it a lot more understandable and enjoyable. I'm watching a lot of these projects which I call rehashing. I just had to compliment the mitered corners of the foam on the refrigerator and kudos to your son's filming and editing. I honestly think it's the best produced on KZfaq. The time lapse extra sped up sequence couldn't be better.

I understand thermodynamics and the Peltier junction refrigerator very well. You did a great job explaining.

Great video! I test and calibrate TEC controllers (among other things) for laser mounts for use in optics labs. They range from cheaper 16W analog systems up to 120W digital systems that can maintain ±0.005°C. The demonstration of the thermal energies between two dissimilar materials is the best I've seen.

I am considered an intelligent guy. When I watch your videos I feel dumb. It is very satisfying watching someone at work that is so supremely intelligent and well studied in what they do.

This is the type of content that KZfaq should be spotlighting, Thank you for taking the time to share your knowledge. Great project

I bet you get tools for Christmas

COP of 2? Man that's way better than I remember when I was toying with Peltier devices many years ago. I figured it was like 0.4 or something. Great video, really loving the content.

Thank you! This brings me back to lecturing days -- it's like I sat through a physics lecture on thermodynamics.

I have a Master's Degree in Ed. for Special Ed. and also in computer based instructional design and this is one of the most educational videos I"ve ever seen . Really solid information in a well edited, accurate and scientific manner. I give this video a solid 5 stars! The comments from some are precious and seem just as important. Wow, there are some smart assed folks out there. Nice to see as an educator. Cheers!

This is really cool, I've never heard of magnetic refrigeration and, as always, you explain everything so well. Happy new year! and good luck on your projects.

You are extremely skilled and smart, thank you so much for sharing you wisdom! Blessings

4 year of my EE .Everybody talk about AI,machine learning,DSP.... then i see this man with electronic and physics understanding, speak about things i barely hear before ,show concepts throug experiments. Speachless ! BRAVO !!!

Another fine video in a string of excellent vids. Thank you for your efforts, informative and very watchable.

Two years ago I did the alternate approach, for the sake of lower operating costs. I bought a small phase change chest freezer and replaced the thermostat with one from a refrigerator. That gave it a higher temperature range and turned it into a chest fridge (all for around $200). It uses a minimum of three dollars electricity a month (insulation losses), plus more depending on how much heat is being put into it (from items to cool and warm air when the door gets opened). I replaced the OEM run capacitor with a larger farad value to improve the refrigerator's power factor, but that made the electricity cost go up slightly (lowering VA raised the Wattage). It had condensation issues, which I solved by putting a bucket of "Damprid" inside. Other desiccants would probably be safer for use near food, but the stuff I store in mine is mainly unused laptop batteries in ziplock bags, alcohol, solder paste and occasionally a bag of fast food. A quirk of the compression pump running on single phase AC is that it has a minimum off time. If the fridge is turned off and immediately back on, it overloads and draws a huge amount of current for a few seconds. It takes a few minutes of being off before it can start up successfully. This is because the motor runs on single phase AC and would have zero starting torque (it would never start turning), except there's a trick used to create fake two phase AC with capacitance which adds a tiny bit of starting torque. The "start" capacitor serves a purpose but then it wastes power after the motor gets going, so a series PTC resistor cuts power through the capacitor after the first seconds of operation. After running, it takes time for the PTC resistor to cool down and reconnect the start capacitor. Also, most phase change systems can't run upside down or turned on their side. Standing mine on the side, so the door swings open like a normal mini fridge, would've damaged the compression pump. The lubricating oil in the pump would drain into the compression lines, then the pump bearings would wear out rapidly. That's also why new refrigerators should be unboxed and stood upright for a while before powering them on, to give any oil in the lines time to drain back into the pump.

Your videos are always amazing. Immensely interesting to hear about the science of these devices. Especially when used for refrigeration. There is a fair few other videos about Peltier effect refrigeration but it's so rare for them to touch on the science, how it works or how to optimize it. Thanks a bunch for making this =)

This is academic level explanations made easy to understand and tremendously engaging

Possibility the best analogical visualization & explanation of bandgap physics I've even seen- deserves its own video

Glad your around, it's nice to learn something on KZfaq. I'm opposed to one idiot copying another, and you aren't and wouldn't.

Very high quality content ! Always explained well! Impressed :)

You are a man who I model my life after, thanks!

You explain the most complicated things within a simplistic boundary that makes it easy for the layman to understand. Thank you!

Great project and good explanation, I liked it.

Your content is always so interesting and informative! Thanks for sharing knowledge in such a thorough and helpful manner. If I ever own property, I'll definitely be DIYing so many things using principles and ideas found on this channel. :)

LOL, nice touch with the foam particles all over the place, glad to see your sense of humour show through. Great channel! I enjoy learning from you, and thanks for sharing.

Never could listen to my physics teacher an here I am watching a 40 minute video about refrigeration and I'm fascinated. You are a great teacher

Thanks for always posting such quality content. It makes it soo much easier for me to recommend this channel to my friends and family knowing that I can just tell them to watch any video of yours knowing they will be getting a great product. Lots of other great channels on KZfaq for sure, but I always have to pick and choose what videos to recommend. I can recommend tech ingredients carte blanche

I'd like this man to be my teacher. He is, in a certain way, though.

I'm going to repeat what others said, but I need to! The quality of your content, the effort you go through, your hability to deliver science in an easy way, it is just unreal, legendary, shocking, its a miracle! Thank you for existing and for showing purpose on each word!

Hands down the best Professor I've ever had. Absolutely love your ability to teach.

I'm very impressed on how interesting and clear you made this. Looking forward to all your future projects! Fun side not my last name is Peltier, I hadn't heard of these coolers until I started my engineering degree (back when the internet was relatively new). I think part of the reason I got my current job is because of my last name and my boss used to be involved in solid state cooling now that I think of it, lol.

due to the weakness of my mind, today I needed a second coffee in the middle :) I love this channel.

I'm 50yrs old.math top student.i didn't finish school due to migration and need to support family.i started electronics/electric/modifications and creating sense I was a child.i became the one that helps solving electrical issues in new module cars from mechanics at new dealerships and all..... Main point i mentioned this is BC I haven't witnessed kind and honest youtuber sense.... Respect Earned not BC of how many followers or viewers.from honesty and kind to offer your expertise for others to benifit.... Hope we see more videos... Best health/peace and wishes to you and your loved ones.

You are absolutely the best teacher I always needed. Thanks for your clear thoughts and methods. Regards.

Damn, that foam got everywhere!

I think a really cool idea for this system would be to build a back-to-back food dehydrator/refrigerator. This video handles the cool side of things flawlessly. I can't help up think that you could build an enclosure on the other side of the refrigerator, that you can blow air across the heat sink to warm the chamber to an temperature appropriate for dehydrating food.

Man i love this channel. Learning that heat comes off everything as well as watts

Man, you are one sharp dude! I have watched so many videos on KZfaq where the creator can't see the tree for the forest. It is refreshing to see someone who knows what they are talking about.

Always a treat. An average KZfaqr might build a swamp cooler or maybe a refrigerator with a secondhand compressor and components. Going in I thought maybe Tech Ingredients would build the compressor from scratch; however, I never would of guessed I'd be learning about exotic new refrigeration techniques.

I came here to see if a Peltier cooler would work to cool/heat a temperature controlled fermentation chamber, and 40 minutes later I now want to build a fridge with those coolers just to see what would happen. I did get a lot of juicy juicy information here. Thank you.

Best science and engineering channel on KZfaq. Most other channels produce novelties, where Tech Ingredients does specifically meaningful, goal-driven technical accomplishments, complete with a thorough scientific explanation. 10/10. Highly inspirational.

Disheveled and covered in whatever you were working with. Reminds me of college... Till I remembered that's what I do now anyway... It's a good feeling to see that go together and look pretty. Looking forward to the data.

Loved the video! I'm commenting for the KZfaq algorithm.

39:55 i wasnt expecting a laugh lol. great content anyway, watched thru the entire 40 mins without getting bored. :)

A lot people forget to appreciate a solid running fridge, let alone your brilliance of efficient dezine. Nice!

that was the best explanation of how a peltier device works that I have ever seen, thank you!

This guy seems like he would be a pretty cool science teacher

39:55 You wear that foam well sir!

I worked in air conditioning and dehumidification for eighteen years, getting out when desiccates where just coming into dehumidification. I understand all of that. What you were talking about went straight over my head! I look forward to seeing the results of your test

Your academic brilliance reflects in your explanations.

Just found this episode from ElectroBOOMs TEC video (though i have enjoyed many of your videos before). Throwing my 2 cents into the mix, what about a bottom hinged door with side sliders for better cooled air retention when opened? Using the unit bottom up, among other things, would mean the hot air vents are enveloping the unit. Using the unit how it sat when the hjeat sink was put together means cold air naturally dropping to the bottom of an internal container and warm air naturally raising towards the TECs. But it also means lifting the damn thing every time you want (which may help sick gains but slows down getting back to the science). Though if the TEC array was a top mount door, it would cut down on churning the air when opening. Rounded side sliders, with a door that wont open all the way flat unless you make it (push the sliders in or out of their track) would cut down on losing cooled air and keep the hot side air away from the outter walls. I know the video is over half a year old, but just wanted to add to the brain storm a bit. Love the vids!

Huge peltier blocks are used in polymerase chain reaction machines in molecular biology labs, and also in sequencing instruments (including genome sequencing machines).. these instruments use the peltier style systems for rapid cooling and rapid heating. Reverse polarity switching to have heating-cooling on a single side is a great thing about peltiers. It requires some engineering/thinking to determine how best to conduct heat & cooling, but you can't do that with compressors without major re-engineering. These instruments are used for melting DNA strands apart by breaking down it's base-pairing hydrogen bonds which happens at about > 92C - 95C and then when cooled, the bonds reform at about < 60C - ish (depending on the DNA sequence), effectively glueing it back together. #TechIngredients -- how well would your box act as a food warmer if you switched the polarity (even if it was horribly inefficient as a warmer)?

I found a wine cooler, it was given up because it had an electronics issue. I took up the fans and peltier systems. Checking it out at home and BAM! I find your video on this! Awesome! And thank you for sharing your knowledge! All that I can say is, "WOW!" I can't wait to make me a soda bottle cooler. Or a aquarium cooler. So many ideas come and go! I did have a 100 gallon aquarium outside, and this is Phoenix, Arizona. When the summer came, it was game over. I tried different methods. But once the heat radiated into the concrete of my patio, it was game over. Thank you, again! I am subscribed!

great overview! Many people treat peltiers as amazing devices with no downfalls but either don't have the practical knowledge, or mislead people about the efficiency.

Ok I'm subbing. Thanks for posting on electroboom's channel!

I wish you a very good evening too Sir. You are going be listed the greatest KZfaq channel soon. Just a matter of time. Take care

If only science class had projects like this. I might have paid more attention.

One of the best videos I've found on the basics of refrigeration and cooling systems. Learned about kinds of heat transfer systems I've never heard of before, such as gadolinium magnetic refrigeration. Just that makes me imagine a futuristic cooling system that transfers heat with magnetic-fluid-filled conduits.

Did you just explain how semiconductors work? Because lot of plus and minus signs in paper don't quite explain why electrons go the way they do. I love how simple the cliff explanation is :)

What else can I say, cool.

Normally I am to stupid to understand indept explanations like this.. But I followed this one and was impressed with the presentation.

No engineer is better than his tools as I always say by my own experience. Very nice explanation and neat project to show the importance of efficiency in this kind of matter

I have a bunch of peltier units for just this sort of project. Your explanations and peltier foam + ball metaphors are fantastic for a visual learner like myself. Definite time compression experienced for the 41 minutes of tutorial. My intended project is a DIY humidor / camera lens "fridge". Do you have any suggestions for reintroducing water vapor to maintain a desired level of humidity? For my purposes, just plain air will probably be sufficient - my local climate is humid enough, however for completeness I would like to manage increasing the humidity directly. I figure the hot side of a peltier could be used to create the vapour with some water, however controlling its introduction back into the system has me slightly stumped. Thank you for this video and your content in general, it's appreciated.

You teased a while back about working on thermal interface materials such as pastes and other such spread on types. Wondering if that was for this project or another? I've seen online stuff like the graphene pads and a quick internet search for performance of thermal paste brings up an astonishing amount of armchair engineer discussions on boards. I think it would excellent to hear your take or maybe even a video. With many such high performance pastes closely guarding their secretive cocktails used to formulate their latest and greatest I think a heavy dose of reality on what is doing the real work would be interesting. Especially like I mentioned since it seems newer types like the pad I mentioned early are appearing in the scene. A pad that is able to be reapplied yet has similar performance to more expensive pastes would be great but I'm skeptical.

6 or 8 months back when I first saw this lab and lecture I could hear only high pitch sound after the first three minutes. Today, however, this resonated beautifully. TRULY appreciate what you do for my brain.

I discovered a wonderful youtube channel on a domain that I really like. This channel is yours, thank you very much for sharing with us these videos which are well filmed, well done, and well explained, a big greeting from Algeria.🇩🇿

If Walter White had a youtube channel

I like to watch these videos just to remind myself of how dumb I truly am 😅

I've never quite understood how phase change heat pumps work but you explained it perfectly for me in 1 minute.

So well explained & easily understandable... Thank you, sir !

I made a smaller one exactly like this ten years ago for my girlfriend's birthday!

Hey it's the father of the son of the main presenter

For my tastes Tech Ingredients is easily the #1 learning channel on You Tube. Period. Thank You.

Youre videos are superb. Next level stuff. No dumbing down. Thankyou!!!!

Cool video. I see there is a hole in the spacers, I guess you have determined that the surface area is good enough with the hole and went for lighter. How did you determine that? Do you have enough experience to know that or did you do a back of the envelope calculation?

Excellent presentation! I'm looking forward to the next video. We have had a peltier based travel unit for a long time and it works great, however, its cooling/heating ability is limited based on ambient air. I hope your design is better!

I really appreciate how well you explained the how process of how this all works.

Can’t thank you enough for the educational component to your channel. It’s what sets you apart. Just love the science and reasoning behind the project. Subscribed.

This is the real life Walter white! Imagine if they had this guy on the show!

Why you guys always end the videos in cliffhanger? Awesome channel by the way. But many previous experiments do not see the light of day anymore

I don’t think I’ve subscribed to a channel faster than this one. Exactly the type of theory and practical application of physics i’m looking for.

Thanks for putting this up. Very very informative. Great way to teach everyone interested in the field. God bless you.