DIY Air Conditioner with Peltier modules 

The cutting precision of your construction is impressive. I wish my projects looked as nice.

The most honest video about peltier conditioners I've ever seen. Excellent job!

Thank you for being honest about your results. Your cat is also a welcome addition.

I love your helper. I had one for 14 years that was involved in every project I did, he just had to be with me when I was working on my hobbies. Alas, time took him away and I miss the heck out of him. I like the way you explained the "real world" effects of your experiment. Too many people would do the same experiment and claim it cooled the whole room by 20 degrees. Great job.

I watched the whole video, didn't think I would but impressive, fair and lots of detail.

10:45 Sorin: I turn the PC and lights off because I don't want a heat source in this room Also Sorin: switches on a 200 W power supply to "cool his room" 🤪😂

Great attempt and goes to show why Air conditioner companies still use compressor based coolers

"cardboard is a *sheet* insulator" Well done Sorin! 🥁

planned for this project but dropped it after seeing your video. Thanks

Very helpful explanation . Sir , thank you so much for sharing your technical knowledge . I am from Sri Lanka .

Great project to cool an outdoor cabinet with electronics.

Even after doing the work to select the best peltier TEC, you still prove that peltier devices are not very good for cooling unless you have free electricity.

Excellent experiment, i appreciate your interest and patience, you are really great 👍❤

I like how you keep the thermometer at the place where the cold air comes out. Other youtubers put it inside the heatsink and trick us.

Thank you for an honest and really enjoyable video

The only youtuber that i blindly push like before watching video and never had disappointed me, Great job master Sorin.

planned for this project but dropped it after seeing your video 👍

i like the supervisor cat. fun and honest video. prevent people from wasting money on non reality assumption and claim .

Very funny & honest report of your project!

I always enjoy your videos and learn alot. Please make more videos for us

As always i absolutely enjoy watching ur videos brother 🎉😊 keep up the good work

Tot corect si drept. Multumesc pentru dimostratia. Salut V.

ah, i found this channel again when i needed it the most

I love this video! even though the project wasn't a "success" it was a success in terms of experimentation and analysis! love TEC and what you try to do with it.

I loved this video! Thank you so much!!

This would definitely save hours, efforts and power for anyone thinking of making ab air conditioner out of peltier modules. Its enticing, but impractical. Thanks for sharing!

I had the Cardboard all years to output my non-stationary AC. As outside protection i used the Gold/Silver emergencycover to reflect the IR-radiation. With Ductape it was realy strong :)

Nice job with helpful information.

Very helpful explanation. thank you.

That video was informative and entertaining. Thanks.

I'm just discovering your channel ( thank you, youtube algorythm ! ) and I really enjoyed this video, you just got a new subscriber, congratulations !

Finally a honest Peltier AC video! I feel if you got more airflow on the outdoor heatsinks there may be better results

Great video. They work, but they require many design considerations since they are so close to each other.

One easy way to make the carboard a better insulator would be to glue aluminum foil onto the outside surface so it reflects more sunlight instead of soaking up the sun. If you also add a layer of styrofoam between the cardboard and the aluminum it should be pretty effective.

From one electronics dork to another - Thanks! I have a design to make one of these for my sailboat - very informative - you have a new subscriber

This is a great video to teach people about how a peltier can work. I don't know if it's been mentioned but if you moved the fan you had cooling the hot side to pull cooler air from inside it will make the cold side colder, the info I found is if you want the cold side to be cooler put a bigger heat sink on the hot side as the more heat you can pull away the cooler the cold side gets. This could be a mk2 version where you put a water cooler on the hot side, if you put a water block on the cold side I would make sure the coolent has antifreeze.

I enjoyed your video and I subscribed. I believe there are other diy projects or builds that can cool a room for less energy/watts. I like how you make your videos. Very interesting.

Brilliant. Thank you

Thank you for speaking true!

If use air for cooling the hot side maybe you extend the intake using flexi hose and position in lower and shaded area. Then extend also the exhaust using tube away from the intake. Thanks for making this project I learned a lot.

thanks for straigt up honesty, a relief from all the BS youtube pushes

Interesting video and I think the idea behind your prototype is good. What I can think of so quickly after seeing your video is that the exhaust fan has too little capacity, also the fan on the cooling side. I would also recommend making a double separation between the hot and cold side in this DIY box. Try that first before purchasing more peltier. Let us know if the difference has increased. Succes, greetings from a 28 degrees C. Rotterdam.

Very nice Omule!

your all projects are great, but, mostly i like it when your all time available supervisor comes in picture with your company :)

Finally someone that brings some cat to the table.. I mean.. some light... you not only delivered the truth about all the DIY projects that claim godly results, but you also made your own version to prove it, and with real world measurements. Now I need a nice DIY project to use the peltiers I bought years ago

Fun video, and honest about the results. I'm guessing there is no way to make an airconditioner better than a commercial one or someone would already have developed it as a commercial product. But who knows?

If you run the vents through the floor it will work a lot better, I have seen a unit like yours used with pipe running three foot under the ground and it worked fantastically

Great video. Water to air is definitely better on power. Especially with usb powered fan and water pump.

Fun project.

thank you for sharing your experiment, I am dreaming we can provide low energy cooling for people that not so fortunate.

Great project! I do think, you can improve temps on cold side by installing more and better fans on the hot side, more airflow is better. So is with the cold side too.

I also do some DIY with Peltier elements. For sure I will watch your other videos about this. I would like to build a fermentation box for sourdough. This is to be kept at a constant 28°C. The Peltier element must therefore be used as a heater for most of the year. I hope to be able to heat a small box with two elements. To reduce the current, connected the elements in series and double the voltage. First experiments suggest that I can run the elements at about half the rated voltage, which should boost the efficiency.

a 90w peltier has a btu of just 100, a 200 ltr fridge of 150w gives a cooling of 450w & is 1800 btu , the efficiency of refrigerant based heat pumps is more than 100, probably this is the reason no one is ready to make a ac based on peltiers.

good explanation. thx

Ca sa aveti rezultate bune la climatizare trebuie neaparat sa izolati termic pe interior 1 peretele exterior 2 geamul .Dupa care faceti iar test+grafic+vedeti cu termoviziunea situatia si mai izolati soprafete ce radiaza caldura.Elementele Peltier au randament f mic=energofage. Multumim pentru calitatea prezentarii❤

This project would have never been completed without the expert supervision of the Cat.

Heating or cooling anything aren't cheap, I respect this guy's honesty (at 12:59 mark). One can play around this all you want, but if you need real cooling, get a proper air conditioner.

Really interesting and informative videos and thanks for making this video ``````❤❤❤❤❤

The cool side should have one air input, one air output. Creating the airflow in one direction, also have the car type vent on the exit side. Use a better insulation in between the cool side and the hot side. One peltier module will drop the temp with about 17degrees in a 25 liter coolerbox. Wich is an enclosed space. How many liters does a room have? :) nice thinking though.

Best build i did see for a long Time... Also try to get an old used aio pc cooler for cheap. Make those tubes longer and its working a lot better. Also try to use an better 15A (12715) ore 20A (12720) peltier module, rather than more cheap ones. Its more efficient that way. I use an 20A one, the biggest that fits on the aio pump unit, and an 200mm x 300mm Aluminium heatsink on the cold Side freezes without an fan. With one it gets my room about 4°C colder in one hour when im in my room. Also my powesupply is Inside. But i have an small room that is also very good insulated. Maybe that helps also. I think also your heatsinks are way to small on the hot Side. Peltierelelments can only cool effective about 10-15°C below the Temperatur of the hot side.

amazing craation bro.

Amazing project, I'm impressed! You may also want to put the heat radiator end on the outside of the cardboard? The line of the peltier modules should be the divider at the window cardboard itself so that no heat from the heating end escape into the room. Would be good if you do another video with this configuration? Thanks!

I loved your cat's action supplementing your project as a partner.❤

Impressive, maybe an improvement if interested window panel painted white on both sides with spacer 3rd layer to create a place for reflectix between. Would help in absorbed thermal from outside, oil base white paint is water proof

I will use those peliter to make a cooler for a laptop. A stand that makes cold enough air to be sucked in be the laptop fan this way increasing the laptop cooling. Especially gaming laptops that reach 90 degrees or more.

finally i can make my own ac for my sciece project oh wait i had a fight with my firend about making a fridge not an ac because it is less efficient seeing your test videos i noticed that 12703 peltier module gives highest coolness even makes ice if i had used these peltier module in my fridge i could even make a freezer or make it water cooled i gotta send this video to my friend now

You could spitz yourself with a bottle of distilled water, then stand in front a low speed fan, or sit, and the evaporating water will steal heat to chill you off efficiency / Peltier coolers like this are only about 4% electrically efficient as coolers when used in such solid state compact fridges and similar / cheap for sure, but not efficient / I am reminded of early gasoline engines //

Great Video!

im fcing a problem instale the platier module as recomende it is heting fron both sides ??

thanx for testing it out.. I see fake videos and it looks nice, but in your video, i can see the actual results.. Thanx

Finally you got new subscriber bro🎉

im getting basically free solar every day and its getting kind of warm . ill do very similar but with pc cooling tower and minor box change for foam but this is very smartly done.

Thank you.

Fit the cool side behind a bldc pedestal fan , give proper duct out to hot side with a mini 12v fan which leads to a window frame as seen in portable AC's also add water cooling for the hot side. Don't intend to cool the whole room instead sit besides the fan and it should provide enough cooling near the main fan.

Dude! It's all about temperature differentials. You must "pre-cool" the hot side first in order to let the peltier device to work more efficiently. Things you can do, for example, keep the hot side away from the sun, use water cooling, etc. Also, calculate the BTU. Your room might have bad insulation so your west facing wall can be very hot to begin with. You didn't make a good air conditioner doesn't mean the theory is bunk.

am going to try watercooling with raw sea water for my boat with a car radiator when summer comes

With this smallish cooler... It's better to cool a smaller area like under a blanket rather than the whole room.

One thing that will help is have a more powerful fan for the outdoor and variable speedfan for the indoor with a much powerful power supply that is capable of giving enough power to it

Instead of using heat sinks for the hot side of peltier module, you can use liquid cooling techniques!, It will be more effective than your current made prototype. Thank me if I am right 👍🏻

The hot side ventilation is super restrictive. Remove all the case around those hot side heatsink's an use 3 fans. Also reduce the voltage to about 6 maybe 7V to the peltier for increased efficiency total power consumption will be around 30W including all the fans. Then all you need to do is multiply this by around 10x and you will have a decent enough room air conditioning. So 40 peltier modules each around 6 to 7W with a COP of around 1 thus about 280W of cooling power likely just good enough for that one room.

I've read of high efficiency peltier modules but I don't think their commercially available and I bet still less efficient than a compressor. Commercial peltier AC units are/were sold for industrial applications were they can be installed in any orientation (upside down on a ceiling).

Looks effective, I wonder if running the chambers with a low pressure fan configuration would help achieve better thermal efficiency?

Nice! I am wondering if there is some mini compressor w evaporator etc on Alliexpres for making something more efficient

wow this is cool I was always curious how it will turn out if i make something like this.. the question is how about the humidity absorb from the room? I would love to see an upgraded version of this. Huge Thumbs up

a fun & informative project as always, Sorin. I'm curious if using a radiator would help with the efficiency of your build... so the peltier modules heat liquid inside a tank/reservoir instead of air, then the liquid would be pumped out to a radiator which will transfer the cold to the air & the warmer liquid returns to the top of the reservoir to close the loop. > Also, instead of venting the hot air horizontally, it would be better if the pipes were right over the heat sinks pointed upward with the fan repositioned to the bottom so natural air convection can pull more heat off the hot side. > Of course, the power used by the additional fan that pulls air through the radiator may offset the cooling gains with even more power consumption... but I'd be curious to see if this is a viable alternative. cheers & looking forward to your next adventure with your assistant Chichi!

They need to invent new things as its silly how much power they take. Ur video was the first and it was a great experiment xx

I remember being fascinated with these after getting my first mini fridge. Really cool physics but they drew a ton of power and were easily heat saturated. At best they had a temperature gradient between the sides of 40 degrees. Hopefully the technology has progressed but compressor systems are simply more efficient

Clever stuff!!

You should make a swamp/water cooler tutorial. These things actually cool air and they don't consume as much energy.

That is so cool 😎

Great video Sorin. I'm interested in doing something like this for myself. However id like to go for a solar solution. Based on your stated vakues you need around 156W for the entire setup right? And any idea on how to design a solar + battery solution? Thanks

Thanks Sorin for experimenting again with Peltier panels. I was always fascinated with Peltier modules, but never had opportunity to solve the heat issue properly and keeping energy consumption low compared to other already available devices on market. Thanks to heat pumps (also small ones), there are plenty of choices out there for heating or cooling and their prices are also dropping. Therefore, Peltier panels probably will stay forgotten for another 100 years :) Maybe you could do an experiment with a little solar panel (I know a lot of ampere would be needed and easily it can become unreasonably expensive project) and a small heating module made of Peltier panels for winter. This way it could be completely green solution, if feasible.

how do you know which side peltier is cold or hot?

thanks

Honest video about peltier

On thing you need to consider, the outside of your model, may recirculate the hot air, try to put elbows for the hot air to be discharged far from the fan sucking area.

great video disproving lies! thanks

Peltiers have a datasheet which tells you how you get a low temperature vs how to move heat most effectively. At 12V your cold side most likely suffers from the heat generated in the module. Somewhere around 5-7V should be more efficient. Then you can scale up the numbers of elements, probably 6-10x. And that's why they are never used for air conditioning. A compressor or an condensor move much more heat in a much cheaper package. Peltiers are cool if you need precise temperature control, extremely cold temperatures or you can afford the huge ones with proper Isolation between hot and cold terminal.

The hot side of the box should be well insulated, ideally it should be entirely outside. The best heat sinks would be from early BTX style desktop PCs. They often had a kilogram or more of metal in them.

i deffinetley watched those videos, i decided to make my own cooler with peltier but more of a personal cooler instead of a room cooler