I love the first part of the video - it reminds me of things we did in engineering lab when I was in college. Engineers and technical people have the best sense of humor!
A very definitive example of a more real process, much more efficient, but more so concept of what it might really be or become, much more efficient. Peltier modules make 1.5 volts driven by their own heat, heat uses energy. Looks like it can be reconfigured to use its own volt in some way. Great job Julien, shall keep an eye on you.
*+Julian Ilett:* Nice video Julian! To be fair I think you should say that a TEC needs to dissipate *two* sources of heat: 1) the heat being moved from the cool side to the hot side as well as 2) the self generated heat of the PN junctions. Also to be fair, TEC's only run about 10-15% efficient. I think you should say that TEC cooler performance is a function of ambient temperature (the warmer they get, the less efficiently they operate), hot side and cold side heatsink performance (as you demonstrated, better heat sinks make them work better), the thermal load, the physical geometry and the electrical parameters. Sorry for my nit-picking it all just goes to prove TANSTAAFL = There Ain't No Such Thing As A Free Lunch ... LOL thanks for a great video
They are fun to mess with. I built one that was mounted on a water block with a small water pump. I was able to get it much more efficient by highly polishing the block and using diamond paste.
this vid is old, but tec just means ThermoElectricCooler the C in TEC doesnt stand for the size AND 127 neither stands for the couples. it stands for 12 Volts and 7 couples. At least one parameter is right in this diagram: 06 actually stands for the max current. Also, connecting the peltier to electricity without cooling the hot-side heavily reduces its lifespan!
Also, now that I think about it, you could run the peltier at low power to use it as a dehumidifier. Maybe down to just a few degrees C, or ~40 F. That way, you wouldn't have to cycle the element, which reduces thermal stress.
They have a 15A @12V I wonder if this has enough to cool a good size refrigerator or maybe 2 of these on each side of the freezer area... Years ago I had a idea to cool this processor enough so it wouldn't throttle and overheat and maybe use a 1A with a dimmer switch to bring the current up or down, but I was worried about water, but the heat coming of this processor should dissipate the moisture.2Pcs TEC1-12715 Heatsink Thermoelectric Cooler Peltier Plate Module Description: Solid state, vibration free, noise-free Simple to install and operate The hot surface need to be good heat sink Specification: Product name: thermoelectric cooler plate module Model: TEC1-12715 Color: white Couples: 127 Voltage: 12V Umax: 15.4V Imax: 15A Max power consumption: 231W Tmax: 70°C Qcmax △T=0(W): 137W Size: 40 x 40 x 3.3mm Weight: 100g(2pcs)Package included:2 x TEC1-12715 module
I bought one fully assembled from Banggood and hooked it up to my power supplies. The peltier is only using 3 Amps at 12v from my bench power supply. Cold side only gets about 51F and hot side 73F with room temperature at 72F. I wonder if they put a different model peltier in it. Tried another power supply and it behaved the same way. Or maybe assembled wrong? It came ready to go. Anyone have any ideas on why it is not taking 6 Amps and not cooling more quickly and getting colder. No ice buildup at all. Cold to the touch. Hot side pipes and heatsink are not warm at all. Seems like even at 12v 3A it should be colder/hotter than this.
Actually mouth is a great sensor. Once I build a small dynamo and used to check whether it was working or not by sticking wires into my mouth (I didn't had a multimeter). It can detect very small voltages
Probably a word of warning, if Julian doesn't mention it. Don't put the peltiers rated voltage across it while you have it in your mouth. You're going to end up with one burnt lip and one stuck frozen to the peltier, until you disconnect the power :P
That is so good, i changed my element in my 5V USB coffee heater to one of those 12V ones and ran it out of a 5V 3A wall socket. Now i can keep my coffee warm and even reheat it again if i forget to tern it on :D
You drag your words out so long that I actually fell asleep halfway through the video... and I'm not joking, I dozed off and woke back up and you still were rambling about the same thing.
Nice one - xept my stove needs slowing down ! I made a cool box for food - a sort of fridge, but no Ice box, yet. It uses Two parallel strings of 4 in series, and a dish of water cooling the hot sides via a thick flat Aluminium plate, and two Pc fans in series blowing on the water. It saves my world in that hot weather here in Bulgaria. Goes nicely on 24v (from regulated Solar panel). The regulator makes litres of hot water :)
Come to think of it, I did what you did, too. Back in 2010, I was skint and had to give up gas bottle cooking, and made a forced draft wood burner the size of a Gaz Camping stove. Had "smoked" Everything ! I always say, "It's an I'll wind INDEED, +(that blows no good at all !)
I was at the LLNL (Lawrence Livermore Nuclear Laboratory) once with a Physicist friend and he asked me if I wanted to go to an electronics swap meet down in silicon valley. So, we met up at 5 am and hit the sale. All kinds of high end stuff laying out on tables selling for pennies on the dollars from companies that started and went bust. I saw a 15 stage peltier laying on a table that I should have bought. He told me that it would actually produce frozen nitrogen out of the air when it was running. The base unit was about 8" long and 5 " wide. The next unit was smaller and each successive one smaller still. The final unit was about 1" square. All sandwiched together. That would have been cool.
Once in the body, beryllium acts as a hapten and interacts with human leucocyte antigen (HLA) DP presenting cells in the lungs, becoming physically associated with a major histocompatability (MHC) class II molecule. This MHC class II-beryllium-peptide complex is recognized by the T lymphocyte receptor, triggering CD4+ T lymphocyte activation and proliferation. The resulting inflammatory response is a cell-mediated process orchestrated by cytokines and results in the formation of (usually pulmonary) granulomas. Beryllium's toxicity may be controlled by the iron-storage protein ferritin, which sequesters beryllium by binding it and preventing it from interacting with other enzymes. Beryllium is absorbed mainly through the lungs, where it enters the bloodstream and is transported throughout the body by binding to prealbumins and gamma-globulins. Beryllium accumulates in lung tissue and the skeleton. It is excreted mainly in the urine. Classed as a carcinogen by the IARC. Acute inhalation of a high level of beryllium can result in a pneumonia-like condition called acute beryllium disease. Chronic inhalation of beryllium can cause an inflammatory reaction in the respiratory system called chronic beryllium disease. Chronic beryllium disease may result in anorexia and weight loss, as well as right side heart enlargement and heart disease in advanced cases. Chronic exposure can also increase the risk of lung cancer. Skin contact with beryllium results in contact dermatitus.
10:27 What about having the lower part of the heat sink in a small, shallow, tray of water? (At least for testing, to reduce the possibility of damage...)
The most efficient method to use on the hot side is a liquid temperature controlled heatsink. The hot side needs to be at or below 70 degrees Fahrenheit. That makes the cold side 30 degrees or colder Fahrenheit hopefully. BangGood sells the water cooled heatsinks.
If you wanted to make a dehumidifier, could you... run air from the hot side (after being heated up) over to the cold side where it would then cause the moisture to condense?
Luckily my tape water is very close to my air cooler. And I was thinking to attach a hot side of peltier to aluminum tank and connect it with tape without motor assuming hot water will automatically move toward my house water tank. I can use motor but want to understand if I can use same tape point for inlet and outlet of motor will it be useful?for 3 peltier of 6Amp which power supply unit i can use?can't use battery so thinking of some kind of smps. Kindly guide me. Regards, Ashish kumar
I love your channel, I was looking for an answered online if I can control the temperature of the element by controlling IN - V/I and you covered it in the first 20sek of the video :-) Thank you very much!
So maybe I’m confused, but if it’s laying on the side, I’m pretty sure the heat pipes aren’t going to work correctly and the copper tubing is probably carrying a lot of the heat away.
In general dehumidifiers bind the element to a large thermally conductive plate, which it then keeps just above freezing. A fan then blows room temperature air across it slowly. Water drips off the plate into the water tank. Dropping the element below zero just freezes the water it collects, which is a waste of energy.
great video as always. i made the exact same thing for a coke'n' sandwich cooler from a scrap heatsink and a ebay peltier 10 years ago, but buying saves time, so well done banggood, bit expensive but its heavy to ship.
I bought a tec 12726 to play with from banggood, it is suppose to get down to -30 deg C. "mind you mt bench psu only does 10 A max" I have seen them heated to make a makeshift phone charger whilst camping
7 лет назад
You should try getting less surface tension by coating the heatsink with some kind of teflon based spray. It would make it harder for the water droplets to form and drop quicker. (Although this is a horribly inefficient way to dehumidify anything, but would be fun)
Hi Julian, Could you make a video showing power generated by the Peltier unit using a temperature differential? How about also using multiple units stacked for a greater effect?
www.ebay.com/itm/TEC1-SP1848-27145-TEC-Thermoelectric-Heatsink-Cooler-Peltier-Plate-Module-/311534560155 and www.ebay.com/itm/TEC4-24603-Heatsink-Thermoelectric-Cooler-Peltier-Cooling-Plate-Four-layers-/262174876788
RE:Naming, it looks to me that TEC is for cooler, vs TEG is a generator. Both devices work bidirectionally, but, there are more efficient in the direction they are designed for.
You have barely scratched the surface of what these things can do. What I think is the greatest is that it works both ways. You can supply heat and cooling and generate electricity. You sure can´t add electricity to a solar panel and get sunlight. you can make your own stove/mini fridge combo. (cook some eggs.)
Those heat pipe type heat sinks work best with the mating face pointing downward as the medium inside the heat pipes vapourises then condenses on the pipe walls, but then requires gravity to return the condensed liquid to the bottom again. Enjoyed the vid though, I have a project that looks very similar to that ;-)
Thanks for the video, great intro demo to heat sync, etc. Tell the puppet i said these videos are great and it keeps your hand warm, soooo stop complaining ;)
Hmmm water and electricity - shocking But seriously you are one of the more informative people on RUclips - delivered with your own special brand of humour - priceless. I had forgotten how funny this video was, came back for a rewatch after seeing thought emporiums cloud chamber today. Keep up the good work Julian.
I have an inductor from a UPS with only 2 legs (1 wire). I can't seem to find any Joule thief designs that use this type of inductor. Can I use a 2 leg inductor with a Joule Thief?
I've been planning on making a diffusion cloud chamber and the main components are Peltier elements - if memory serves me well I'd need to reach around -30/ -40C for the chamber to work and I heard that to achieve those temperatures I'd need to stack two Peltier elements on top of each other, with the element on top running at a lower current than the bottom element.
There are some multi-element Peltiers on eBay. They're stacked and look like pyramids - the colder elements are smaller. TEC4-24603 Heatsink Thermoelectric Cooler Peltier Cooling Plate Four layers #SoreKara www.ebay.com/itm/TEC4-24603-Heatsink-Thermoelectric-Cooler-Peltier-Cooling-Plate-Four-layers-/262174876788
Stick the Peltier on your lips and then connect it to 13.8 Volt supply. :) Result : Stiff Upper Lip! ;) hahaha Great video anyway. I have been messing about with them for a few years. Cheers!
I actually tried to build a dehumidifier with an almost identical setup. I was as not very successful though. I got the water to collect on the cold heatsink but not get it to drip. With properly sized heatsinks it should stay just above freezing point. BTW for a dehumidifier it should be more efficient to direct the cold air from the cold heatsink into the hot heatsink.
4:21 a better, or just different, explanation i heard was that somehow, i don't remember the details, it creates a difference within a certain range between the two sides. It can't cool lower than that range compared to the hot side, but the resistance and as you mentioned heat leaking back to the cold side would tend to heat both sides some in most situations. The range of temperature difference between the cold side and the hot side results in the cold side being warmer than ambient temperatures but colder than the hot side if used without heat sinks in many cases.
6:10 i wish you would've picked it up real quick and checked the temperature of the hot side. Maybe even made a line graph for different temps comparing hot and cold sides.
In this situation It dosent matter but if you want the most efficiency out of that heat pipe cooler have it upright the heat pipes are hollow filled with something that boils and condenses when it hits the fins
using a 100w peltier plate, and a nice large CPU cooler on the hot side, and the stock intel cooler on the cold side, i was able to cover the intel cooler with about 1cm of frosty ice, its qutie impressive. they all operate at a delta temperature, not all peltier plates are created equal, so one 100w plate might have a 80*C delta, and another might have a 40*C delta.
The fun part is you can also put the hot side on a coffee can with holes in it start a small fire in the coffee can and hook the other end up the wires to a phone charger and you can actually have a fire in the can and charge your phone try that one
Try to cascade them, see how much cooler they run :) Also, for moisture removal, an Arduino project will be nice. Compute the dew point and run the Peltiers just below that temperature with pwm, perhaps?
Julian; This episode makes you officially and genuinely crazy, sticking a Peltier in your mouth, think of children. I use to watch just because of your so mellow smoothing speech, but now I will look forward to more cray. ;-) Anyway well done. You should however tried to measure or estimate BTU efficiency of the device. I've always read that Peltier are just nasty with inefficiency, so do the math for us, perhaps using a abacus by manipulation with your tongue, My only experience was about 25 years ago hooking one about your size to 12vdc with nothing attached. After about 5 mins the thing actually unsoldered itself into a heaping pool. No problem I've always supported destroying stuff in the pursuit of science and knowledge.
Lawrence L I heard they’re about 10% efficient, this 72 W Peltier can pump only 7.2 W of heat. So yeah, pretty bad, a heat pump has an efficiency of 300 %. If the Peltier had that efficiency, it could pump 216 W of heat!
+Julian Ilett Please be careful saying that a blunt knife is safer. Rarely is a blunt knife safer, since it requires more force to use it, and therefore things become dangerous more suddenly. Always use a sharp knife, and brace yourself to limit movement. An easy way is to hold your forearms tight against your chest and only use the limited motion of your wrist to force a cut.
They have a 15A @12V I wonder if this has enough to cool a good size refrigerator or maybe 2 of these on each side of the freezer area... Years ago I had a idea to cool this processor enough so it wouldn't throttle and overheat and maybe use a 1A with a dimmer switch to bring the current up or down, but I was worried about water, but the heat coming of this processor should dissipate the moisture. 2Pcs TEC1-12715 Heatsink Thermoelectric Cooler Peltier Plate ModuleDescription:Solid state, vibration free, noise-free Simple to install and operate The hot surface need to be good heat sinkSpecification:Product name: thermoelectric cooler plate module Model: TEC1-12715 Color: white Couples: 127 Voltage: 12V Umax: 15.4V Imax: 15A Max power consumption: 231W Tmax: 70°C Qcmax △T=0(W): 137W Size: 40 x 40 x 3.3mm Weight: 100g(2pcs)Package included:2 x TEC1-12715 module
In your educated opinion - Can you use the cooling generated through the Peltier through the element pushed out via the small fan to cool the bottom side of a laptop where the laptop fans would then pull that could air into its cooling system. The reason I'm asking is because I want to know if the fan would push and damaging moisture for such a cooling system
Could you use a Peltier device in a Fanless mini PC unit, between the CPU & the Aluminium case, with a control circuit? You wouldn't need to cool it like in a fridge use, but just enough to keep the CPU from cooking ?.
It would be interesting to see if it could be converted to a Seebeck Generator, to generate electrical power. All that's needed is to change the plate type to one optimised for power generation, and fit it in reverse.
Heatsink has to dissipate the 72 Watts (12v 6A) to run the Peltier device added to whatever heat is transferred from the cold side to the hot side. Net effect is a lot of heat is generated for a small amount of cooling. You have to keep the hot side cool which is difficult due to Peltier operating inefficiency. A good heater, but a poor cooler.
Thx for the nice video, sir, please measure the amp consumption, I've bought 3 of those from banggood also the 8 Amp one ( TEC1-12708 ) and all never reach 50% of its rated amps !!!
Cool (pun intended). It would have been interesting to have used water cooling for the heat sink by putting it in a plastic container with ice and water below the level of the Peltier element, of course, just to see how low the temp would go.
but why why why did they use metal fasteners on the cold side, so it can pump a few percent of your efficiency back out to ambient? You can just about make out water condensing on the length of the threads, outside the gasket material
There are a couple of problems for me: 1/. Obtaining or making a thermostat / humidostat controller and a power supply that can provide 12 V 6 amps. The overall system would be quite large. 2/. Bangood do not ship to Taiwan ! (surprise surprise. !).
In next week’s episode we’ll watch paint dry and then sometime in April a special on how fast grass grows. Thank you for a really enjoyable video as usual - I’m using the Peltier Element to make a “self-powered” wood burner fan blower doh-da...and generally amuse myself.
You can just run the peltier chip run at a lower voltage or current and try to find the perfect voltage/current at where dehumidifying is at it's peak.
Hey there ! Can you tell me how much power does it take to say take 10w heat from cold to hot side? Lets say the outer heat sink is 10c hotter than the cold side
I used to play with these back in the late 90's. They were quite fascinating but then I quickly lost interest when I realized how horribly inefficient they are compared to compressor-based cooling. Although, a TEC's solid-stateness is a huge advantage :)
Rightly or wrongly I always thought the small fan was fitted to blow the cold air emitting from the cold side ? You mentioned it didn’t get as cold after fitting the fan or did I miss something ?
What I am about to say, although the video is impressive, has nothing to do with the work being carried out by you. I would like to inform you, or whoever reads my comments, and you will hopefully spread the word around that, instead of using the very expensive thermo-paste, you may want to use: Copper slip, its results are just as good at a fraction of a price. The thermo-paste syringe of 10 milligrams probably costs about 5 pound sterling, whereas a 500 gram tin or tube will set you back: 10 pounds sterling. Please pass the news around, thank you!
Ah yes, watching ice melt, used to be one of my favorite things to do in early spring here in the Dakota's, where weather runs the gammat from over 100 F in the summer to below -40 in the winter, the sping on the farm used to be filled with hitting the barnyard with hoes and shovels to drain off the melting snow and ice so the smelly earth could dry and be used once again as a gathering place for the milk cows before the milking (always by hand, who could afford milking machines?) and after.
I wonder if you start drawing the power from the peltier as soon as u stop powering it will give u a decent amount of power back to make up for the inefficiency? Maybe make the cold side stay cold too?
I love the first part of the video - it reminds me of things we did in engineering lab when I was in college. Engineers and technical people have the best sense of humor!
A very definitive example of a more real process, much more efficient, but more so concept of what it might really be or become, much more efficient. Peltier modules make 1.5 volts driven by their own heat, heat uses energy. Looks like it can be reconfigured to use its own volt in some way. Great job Julien, shall keep an eye on you.
I just ordered 4 of the 15A ones. My turn to have fun!
*+Julian Ilett:* Nice video Julian! To be fair I think you should say that a TEC needs to dissipate *two* sources of heat: 1) the heat being moved from the cool side to the hot side as well as 2) the self generated heat of the PN junctions. Also to be fair, TEC's only run about 10-15% efficient. I think you should say that TEC cooler performance is a function of ambient temperature (the warmer they get, the less efficiently they operate), hot side and cold side heatsink performance (as you demonstrated, better heat sinks make them work better), the thermal load, the physical geometry and the electrical parameters. Sorry for my nit-picking it all just goes to prove TANSTAAFL = There Ain't No Such Thing As A Free Lunch ... LOL thanks for a great video
They are fun to mess with. I built one that was mounted on a water block with a small water pump. I was able to get it much more efficient by highly polishing the block and using diamond paste.
找了好久没找到像这个这么详细介绍的，非常适合初学，感激不尽！谢谢啦！
this vid is old, but tec just means ThermoElectricCooler the C in TEC doesnt stand for the size
AND 127 neither stands for the couples. it stands for 12 Volts and 7 couples. At least one parameter is right in this diagram: 06 actually stands for the max current.
Also, connecting the peltier to electricity without cooling the hot-side heavily reduces its lifespan!
Incorrect. The 127 refers to the number of couples. Different TECs have a maximum voltage rating, it's not always 12 volts.
Also, now that I think about it, you could run the peltier at low power to use it as a dehumidifier. Maybe down to just a few degrees C, or ~40 F. That way, you wouldn't have to cycle the element, which reduces thermal stress.
"Lets watch this ice melt" - Classic!
Yes, in hindsight....
Haha, yes =D
David T. Proof of global warming so might say
Right after "This IS a proper job!" ^^
They have a 15A @12V I wonder if this has enough to cool a good size refrigerator or maybe 2 of these on each side of the freezer area... Years ago I had a idea to cool this processor enough so it wouldn't throttle and overheat and maybe use a 1A with a dimmer switch to bring the current up or down, but I was worried about water, but the heat coming of this processor should dissipate the moisture.2Pcs TEC1-12715 Heatsink Thermoelectric Cooler Peltier Plate Module Description: Solid state, vibration free, noise-free
Simple to install and operate
The hot surface need to be good heat sink Specification: Product name: thermoelectric cooler plate module
Model: TEC1-12715
Color: white
Couples: 127
Voltage: 12V
Umax: 15.4V
Imax: 15A
Max power consumption: 231W
Tmax: 70°C
Qcmax △T=0(W): 137W
Size: 40 x 40 x 3.3mm
Weight: 100g(2pcs)Package included:2 x TEC1-12715 module
I bought one fully assembled from Banggood and hooked it up to my power supplies. The peltier is only using 3 Amps at 12v from my bench power supply. Cold side only gets about 51F and hot side 73F with room temperature at 72F. I wonder if they put a different model peltier in it. Tried another power supply and it behaved the same way. Or maybe assembled wrong? It came ready to go. Anyone have any ideas on why it is not taking 6 Amps and not cooling more quickly and getting colder. No ice buildup at all. Cold to the touch. Hot side pipes and heatsink are not warm at all.
Seems like even at 12v 3A it should be colder/hotter than this.
If you buy stuff from China you get inconsistent quality. Live with it.!
"stick in in your mouth then connect they battery to it" -Julian Llett 2016
Susan Donovan w
Fucking Priceless! I was laughing so hard I had to give you your props! Peace
So beautiful
hahaha you forgot the following "mmmm mmmhmmmm"
Actually mouth is a great sensor. Once I build a small dynamo and used to check whether it was working or not by sticking wires into my mouth (I didn't had a multimeter). It can detect very small voltages
Probably a word of warning, if Julian doesn't mention it. Don't put the peltiers rated voltage across it while you have it in your mouth. You're going to end up with one burnt lip and one stuck frozen to the peltier, until you disconnect the power :P
That is so good, i changed my element in my 5V USB coffee heater to one of those 12V ones and ran it out of a 5V 3A wall socket. Now i can keep my coffee warm and even reheat it again if i forget to tern it on :D
Good explanation
Good camera
A little warning, going to switch to front face now.. Sees sticker on glasses... In shock
That robot kit..
At this pace, it's going to be an easter egg for this channel :D
You drag your words out so long that I actually fell asleep halfway through the video... and I'm not joking, I dozed off and woke back up and you still were rambling about the same thing.
You should experiment with the Peltier as a power source, I built a self powered wood stove fan ;)
Nice one - xept my stove needs slowing down !
I made a cool box for food - a sort of fridge, but no Ice box, yet. It uses Two parallel strings of 4 in series, and a dish of water cooling the hot sides via a thick flat Aluminium plate, and two Pc fans in series blowing on the water.
It saves my world in that hot weather here in Bulgaria. Goes nicely on 24v (from regulated Solar panel). The regulator makes litres of hot water :)
Come to think of it, I did what you did, too. Back in 2010, I was skint and had to give up gas bottle cooking, and made a forced draft wood burner the size of a Gaz Camping stove. Had "smoked" Everything !
I always say, "It's an I'll wind INDEED, +(that blows no good at all !)
I was at the LLNL (Lawrence Livermore Nuclear Laboratory) once with a Physicist friend and he asked me if I wanted to go to an electronics swap meet down in silicon valley. So, we met up at 5 am and hit the sale. All kinds of high end stuff laying out on tables selling for pennies on the dollars from companies that started and went bust. I saw a 15 stage peltier laying on a table that I should have bought. He told me that it would actually produce frozen nitrogen out of the air when it was running. The base unit was about 8" long and 5 " wide. The next unit was smaller and each successive one smaller still. The final unit was about 1" square. All sandwiched together. That would have been cool.
Mike Rhodes 15 stages? Holy shit, that has to be so horrifically inefficient I don't even want to think about it. But sounds really cool
Those "12v" Peltier elements can actually go up to about 15 volts, which is very useful for some real cooling/heating power.
Yet, with bigger power come greater issues with the peltiers generated temperature difference, if the heatsink is not up to the task.
Naahh... Better to upgrade your heat sinks than increase your voltage.
"So the best way to feel what this thing does, is to stick it in your mouth" never heard that excuse before XD
This is perfect. So much info so quick and to the point.
This video was ONE IMPRESSIVE THING ... Loved it Sir.
Thank you for all details and demo
"Probably not very toxic"
"Beryllium telluride"
Haha!
in itself not very toxic but it reacts into hydrogen telluride on exposure to water which then IS very toxic.
It's probably Bismuth telluride, though.
Once in the body, beryllium acts as a hapten and interacts with human leucocyte antigen (HLA) DP presenting cells in the lungs, becoming physically associated with a major histocompatability (MHC) class II molecule. This MHC class II-beryllium-peptide complex is recognized by the T lymphocyte receptor, triggering CD4+ T lymphocyte activation and proliferation. The resulting inflammatory response is a cell-mediated process orchestrated by cytokines and results in the formation of (usually pulmonary) granulomas. Beryllium's toxicity may be controlled by the iron-storage protein ferritin, which sequesters beryllium by binding it and preventing it from interacting with other enzymes. Beryllium is absorbed mainly through the lungs, where it enters the bloodstream and is transported throughout the body by binding to prealbumins and gamma-globulins. Beryllium accumulates in lung tissue and the skeleton. It is excreted mainly in the urine. Classed as a carcinogen by the IARC. Acute inhalation of a high level of beryllium can result in a pneumonia-like condition called acute beryllium disease. Chronic inhalation of beryllium can cause an inflammatory reaction in the respiratory system called chronic beryllium disease. Chronic beryllium disease may result in anorexia and weight loss, as well as right side heart enlargement and heart disease in advanced cases. Chronic exposure can also increase the risk of lung cancer. Skin contact with beryllium results in contact dermatitus.
what he said.
@Stephen Cook Sounds like you may have done some biomedical research on beryllium. :)
10:27 What about having the lower part of the heat sink in a small, shallow, tray of water? (At least for testing, to reduce the possibility of damage...)
The most efficient method to use on the hot side is a liquid temperature controlled heatsink. The hot side needs to be at or below 70 degrees Fahrenheit. That makes the cold side 30 degrees or colder Fahrenheit hopefully. BangGood sells the water cooled heatsinks.
If you wanted to make a dehumidifier, could you... run air from the hot side (after being heated up) over to the cold side where it would then cause the moisture to condense?
Yup, thats the idea
You got one cool fan, and two huge fans quite hot. Lucky you !
so this could keep my tea warm in my mouth ?
Luckily my tape water is very close to my air cooler. And I was thinking to attach a hot side of peltier to aluminum tank and connect it with tape without motor assuming hot water will automatically move toward my house water tank. I can use motor but want to understand if I can use same tape point for inlet and outlet of motor will it be useful?for 3 peltier of 6Amp which power supply unit i can use?can't use battery so thinking of some kind of smps. Kindly guide me.
Regards,
Ashish kumar
I love your channel, I was looking for an answered online if I can control the temperature of the element by controlling IN - V/I and you covered it in the first 20sek of the video :-) Thank you very much!
Very detailed info. Keep up the good work.
So maybe I’m confused, but if it’s laying on the side, I’m pretty sure the heat pipes aren’t going to work correctly and the copper tubing is probably carrying a lot of the heat away.
The fans handle those problems
In general dehumidifiers bind the element to a large thermally conductive plate, which it then keeps just above freezing. A fan then blows room temperature air across it slowly. Water drips off the plate into the water tank. Dropping the element below zero just freezes the water it collects, which is a waste of energy.
Finally some sense spoken on these.
great video as always. i made the exact same thing for a coke'n' sandwich cooler from a scrap heatsink and a ebay peltier 10 years ago, but buying saves time, so well done banggood, bit expensive but its heavy to ship.
ARRGH!! Had forgotten about the model build and then you only removed two pieces! You tease Julian :P
Sir we have the same heatsinks and 12706 PILTIER and im using power supply which is 15A but cant turn into ice just like yours
Love the way you left the label on the glasses. Maybe from the pound shop :-)
Very Nicely Explained. Knowledgeable and entertaining! 😀
@21:37 "Let's watch this ice melt." Next week's show will be watching grass grow.
I bought a tec 12726 to play with from banggood, it is suppose to get down to -30 deg C. "mind you mt bench psu only does 10 A max" I have seen them heated to make a makeshift phone charger whilst camping
You should try getting less surface tension by coating the heatsink with some kind of teflon based spray. It would make it harder for the water droplets to form and drop quicker.
(Although this is a horribly inefficient way to dehumidify anything, but would be fun)
Very good instructions, for somebody that want to play with them, and want to get into it, thanks +1
I know a guy who was playing with one of these, and picked it up on the hot side, he branded himself with the letters RS.
Hi Julian, Could you make a video showing power generated by the Peltier unit using a temperature differential?
How about also using multiple units stacked for a greater effect?
www.ebay.com/itm/TEC1-SP1848-27145-TEC-Thermoelectric-Heatsink-Cooler-Peltier-Plate-Module-/311534560155
and
www.ebay.com/itm/TEC4-24603-Heatsink-Thermoelectric-Cooler-Peltier-Cooling-Plate-Four-layers-/262174876788
I wonder how to calculate the BTU out of this 60w module?????
RE:Naming, it looks to me that TEC is for cooler, vs TEG is a generator. Both devices work bidirectionally, but, there are more efficient in the direction they are designed for.
You have barely scratched the surface of what these things can do. What I think is the greatest is that it works both ways. You can supply heat and cooling and generate electricity. You sure can´t add electricity to a solar panel and get sunlight. you can make your own stove/mini fridge combo. (cook some eggs.)
Those heat pipe type heat sinks work best with the mating face pointing downward as the medium inside the heat pipes vapourises then condenses on the pipe walls, but then requires gravity to return the condensed liquid to the bottom again. Enjoyed the vid though, I have a project that looks very similar to that ;-)
Thanks for the video, great intro demo to heat sync, etc. Tell the puppet i said these videos are great and it keeps your hand warm, soooo stop complaining ;)
Hmmm water and electricity - shocking
But seriously you are one of the more informative people on RUclips - delivered with your own special brand of humour - priceless.
I had forgotten how funny this video was, came back for a rewatch after seeing thought emporiums cloud chamber today.
Keep up the good work Julian.
Watching Ice Melt is a proper job.
I have an inductor from a UPS with only 2 legs (1 wire). I can't seem to find any Joule thief designs that use this type of inductor. Can I use a 2 leg inductor with a Joule Thief?
I've been planning on making a diffusion cloud chamber and the main components are Peltier elements - if memory serves me well I'd need to reach around -30/ -40C for the chamber to work and I heard that to achieve those temperatures I'd need to stack two Peltier elements on top of each other, with the element on top running at a lower current than the bottom element.
There are some multi-element Peltiers on eBay. They're stacked and look like pyramids - the colder elements are smaller. TEC4-24603 Heatsink Thermoelectric Cooler Peltier Cooling Plate Four layers #SoreKara www.ebay.com/itm/TEC4-24603-Heatsink-Thermoelectric-Cooler-Peltier-Cooling-Plate-Four-layers-/262174876788
+Julian Ilett Awesome, thanks!
I went to ebay and bought one for myself after watching your video. I don't know what to do with it yet but I want one! :D
Stick the Peltier on your lips and then connect it to 13.8 Volt supply. :)
Result : Stiff Upper Lip! ;) hahaha
Great video anyway.
I have been messing about with them for a few years.
Cheers!
What would happen if you cooled one side and heated the other with a meter in place of the battery?
The temperature difference is approximately 40 degrees using the Fahrenheit scale
I actually tried to build a dehumidifier with an almost identical setup. I was as not very successful though. I got the water to collect on the cold heatsink but not get it to drip. With properly sized heatsinks it should stay just above freezing point. BTW for a dehumidifier it should be more efficient to direct the cold air from the cold heatsink into the hot heatsink.
4:21 a better, or just different, explanation i heard was that somehow, i don't remember the details, it creates a difference within a certain range between the two sides. It can't cool lower than that range compared to the hot side, but the resistance and as you mentioned heat leaking back to the cold side would tend to heat both sides some in most situations. The range of temperature difference between the cold side and the hot side results in the cold side being warmer than ambient temperatures but colder than the hot side if used without heat sinks in many cases.
6:10 i wish you would've picked it up real quick and checked the temperature of the hot side. Maybe even made a line graph for different temps comparing hot and cold sides.
In this situation It dosent matter but if you want the most efficiency out of that heat pipe cooler have it upright the heat pipes are hollow filled with something that boils and condenses when it hits the fins
using a 100w peltier plate, and a nice large CPU cooler on the hot side, and the stock intel cooler on the cold side, i was able to cover the intel cooler with about 1cm of frosty ice, its qutie impressive.
they all operate at a delta temperature, not all peltier plates are created equal, so one 100w plate might have a 80*C delta, and another might have a 40*C delta.
For whatever reason your voice made me think you were a young lad up until the moment you warned us of the impending front-facing camera 😂
The fun part is you can also put the hot side on a coffee can with holes in it start a small fire in the coffee can and hook the other end up the wires to a phone charger and you can actually have a fire in the can and charge your phone try that one
The temperature differential across one device is limited. You can make it even colder by stacking them.
Try to cascade them, see how much cooler they run :) Also, for moisture removal, an Arduino project will be nice. Compute the dew point and run the Peltiers just below that temperature with pwm, perhaps?
Handsome gentelman! Thanks for your videos, Sir.
Tnx a lot For ur valuable information 😊. I didnt find the meaning of TEC1-12705. Not only that, u give a lot of information. Tnk u again☺☺
This is interesting to quickly get some amount of water from the air with not much power.
Demineralized but still safe.
Julian;
This episode makes you officially and genuinely crazy, sticking a Peltier in your mouth, think of children. I use to watch just because of your so mellow smoothing speech, but now I will look forward to more cray. ;-)
Anyway well done. You should however tried to measure or estimate BTU efficiency of the device. I've always read that Peltier are just nasty with inefficiency, so do the math for us, perhaps using a abacus by manipulation with your tongue,
My only experience was about 25 years ago hooking one about your size to 12vdc with nothing attached. After about 5 mins the thing actually unsoldered itself into a heaping pool. No problem I've always supported destroying stuff in the pursuit of science and knowledge.
Lawrence L I heard they’re about 10% efficient, this 72 W Peltier can pump only 7.2 W of heat. So yeah, pretty bad, a heat pump has an efficiency of 300 %. If the Peltier had that efficiency, it could pump 216 W of heat!
+Julian Ilett Please be careful saying that a blunt knife is safer. Rarely is a blunt knife safer, since it requires more force to use it, and therefore things become dangerous more suddenly. Always use a sharp knife, and brace yourself to limit movement. An easy way is to hold your forearms tight against your chest and only use the limited motion of your wrist to force a cut.
They have a 15A @12V I wonder if this has enough to cool a good size refrigerator or maybe 2 of these on each side of the freezer area... Years ago I had a idea to cool this processor enough so it wouldn't throttle and overheat and maybe use a 1A with a dimmer switch to bring the current up or down, but I was worried about water, but the heat coming of this processor should dissipate the moisture.
2Pcs TEC1-12715 Heatsink Thermoelectric Cooler Peltier Plate ModuleDescription:Solid state, vibration free, noise-free
Simple to install and operate
The hot surface need to be good heat sinkSpecification:Product name: thermoelectric cooler plate module
Model: TEC1-12715
Color: white
Couples: 127
Voltage: 12V
Umax: 15.4V
Imax: 15A
Max power consumption: 231W
Tmax: 70°C
Qcmax △T=0(W): 137W
Size: 40 x 40 x 3.3mm
Weight: 100g(2pcs)Package included:2 x TEC1-12715 module
In your educated opinion - Can you use the cooling generated through the Peltier through the element pushed out via the small fan to cool the bottom side of a laptop where the laptop fans would then pull that could air into its cooling system.
The reason I'm asking is because I want to know if the fan would push and damaging moisture for such a cooling system
Could you use a Peltier device in a Fanless mini PC unit, between the CPU & the Aluminium case, with a control circuit? You wouldn't need to cool it like in a fridge use, but just enough to keep the CPU from cooking ?.
It would be interesting to see if it could be converted to a Seebeck Generator, to generate electrical power.
All that's needed is to change the plate type to one optimised for power generation, and fit it in reverse.
Fresh water out of Air really cool great survival item. Id like to see how much water it could produce in an hour running off a wind turbine.
Heatsink has to dissipate the 72 Watts (12v 6A) to run the Peltier device added to whatever heat is transferred from the cold side to the hot side. Net effect is a lot of heat is generated for a small amount of cooling. You have to keep the hot side cool which is difficult due to Peltier operating inefficiency. A good heater, but a poor cooler.
RIB B Well, until we miniaturize compressors to the size of your thumb, there are some applications where this makes sense.
I'm thinking this would be ideal to combine with beer.
Thx for the nice video, sir, please measure the amp consumption, I've bought 3 of those from banggood also the 8 Amp one ( TEC1-12708 ) and all never reach 50% of its rated amps !!!
Julian, use nail clippers rather than a knife to cut those tabs off: Safer and cleaner.
Cool (pun intended). It would have been interesting to have used water cooling for the heat sink by putting it in a plastic container with ice and water below the level of the Peltier element, of course, just to see how low the temp would go.
useful demonstration
but why why why did they use metal fasteners on the cold side, so it can pump a few percent of your efficiency back out to ambient? You can just about make out water condensing on the length of the threads, outside the gasket material
There are a couple of problems for me:
1/. Obtaining or making a thermostat / humidostat controller and a power supply that can provide 12 V 6 amps. The overall system would be quite large.
2/. Bangood do not ship to Taiwan ! (surprise surprise. !).
In next week’s episode we’ll watch paint dry and then sometime in April a special on how fast grass grows. Thank you for a really enjoyable video as usual - I’m using the Peltier Element to make a “self-powered” wood burner fan blower doh-da...and generally amuse myself.
You can just run the peltier chip run at a lower voltage or current and try to find the perfect voltage/current at where dehumidifying is at it's peak.
Stuff you get on eBay that cheap are ones that didn't pass qc at the factory. If you want better quality try: AliExpress, BangGood, or Amazon.
i can image that being used in watercooled 3d printer, one side keep the inside warm and the cold side keep the hot end cool
Hey there ! Can you tell me how much power does it take to say take 10w heat from cold to hot side? Lets say the outer heat sink is 10c hotter than the cold side
I used to play with these back in the late 90's. They were quite fascinating but then I quickly lost interest when I realized how horribly inefficient they are compared to compressor-based cooling. Although, a TEC's solid-stateness is a huge advantage :)
Rightly or wrongly I always thought the small fan was fitted to blow the cold air emitting from the cold side ? You mentioned it didn’t get as cold after fitting the fan or did I miss something ?
on hot side the heat is transferred from copper tube to the heat sink, my question is pump is not required to flow liquid
What I am about to say, although the video is impressive, has nothing to do with the work being carried out by you. I would like to inform you, or whoever reads my comments, and you will hopefully spread the word around that, instead of using the very expensive thermo-paste, you may want to use: Copper slip, its results are just as good at a fraction of a price. The thermo-paste syringe of 10 milligrams probably costs about 5 pound sterling, whereas a 500 gram tin or tube will set you back: 10 pounds sterling. Please pass the news around, thank you!
2:30 Thankfully only 1.25 Volts agrh frozen lips
Ah yes, watching ice melt, used to be one of my favorite things to do in early spring here in the Dakota's, where weather runs the gammat from over 100 F in the summer to below -40 in the winter, the sping on the farm used to be filled with hitting the barnyard with hoes and shovels to drain off the melting snow and ice so the smelly earth could dry and be used once again as a gathering place for the milk cows before the milking (always by hand, who could afford milking machines?) and after.
I wonder how it would be if you coated the cold side sink with a hydrophobic substance.
Surely tthe fan on the cold side will stop the cold side getting cold?
I wonder if you start drawing the power from the peltier as soon as u stop powering it will give u a decent amount of power back to make up for the inefficiency? Maybe make the cold side stay cold too?
Hi,
@01:14
I think C stands for Cooler. Because you also have a TEG & the G means Generator. 🤔