How faster is an induction cooker really? | Magnetic heating and COOLING

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Magnets are mostly known for their magnetic force, which is very useful in itself. But magnetism is also useful for many other things. In this video I give you a look at just how effective magnetism is for heating food in induction cookers. And how the magnetocaloric effect may be used to magnetically refrigerate your food in the future!
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50 mm sphere magnets and one of the 150x50 mm disc magnets donated by www.magnetportal.de/
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#induction #magnetocaloric #Brainiac75

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29 апр 2020

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Комментарии : 235

@MPSpecial 4 года назад

I worked in metrological thermometry, and as soon as I heard “Pt-100” I was like “heeyyyyyy” I admit I was a bit frightened to see it snapping to the magnets like that. I had to be extra careful while handling them, as any audible shock at the tip, even a tiny one, was likely to destroy their history. You basically had to send them back for recalibration, and that ain't a cheap commission.

@Mezgrman 4 года назад

Didn't know they were so sensitive! I know them as relatively cheap go-to temperature sensors for your average DIY project :D

@pelor92 4 года назад

@@Mezgrman they can be it all depends on whether you are trying to measure a 2 Kelvin or a 2 microKelvin difference

@erickallage 4 года назад

considering you are magnet king of youtube. have you ever tried building a planar magnetic mini speaker ?

@brainiac75 4 года назад

No, I haven't. But it could be a nice project for a future video. Thanks for watching and the inspiration!

@aarongreenfield9038 4 года назад

Try spinning the magnets really fast underneath one of the pots.

@leondrong3916 3 года назад

*he commits into the spinning of his magnets at high speeds* *everyone watches in awe as everything in his house flies around.* Good idea mate

@evilplaguedoctor5158 3 года назад

basically a stronger version of what cody's lab did ( ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-l8PxXZoHTVU.html )

@jhallin5185 2 года назад

Hydraulic press channel did it with a grinder and a bunch of magnets. Results where unimpressive but cool.

@aarongreenfield9038 4 года назад

Cool channel with hot contents attracted me here.

@brainiac75 4 года назад

Hehe, I think you are a cool dude with a warm heart. Thanks for watching and commenting!

@Leonardokite 4 года назад

9:42 "gastronomic skills".....like drinking the cold beer from the magnetocaloric refrigerator!!! Interesting video like always.

@andersemanuel 4 года назад

Your accent is mesmerizing ;) The rhythm of Danish and the clarity of old English. I really enjoy you set ups. Thank you.

@XHappyKillerX 4 года назад

I really enjoy listening, too!

@Mikkelltheimmortal 4 года назад

Thank you for all your videos. I've enjoyed every one of them and always learn something new.

@brainiac75 4 года назад

Glad to hear, Steve! More to come and thanks for watching :o)

@foley15136 4 года назад

These vids are awesome. I show them to my sons. We enjoy watching and learning about science. Thank you for posting them. Please continue. 👍🏻👍🏻👍🏻

@user-it5wu5iv1w 4 года назад

This was a great video! I love the info about thermodynamics and how magnetic fields can play into it! Also, if you celebrate it down in Denmark, trevlig Valborg!

@dcfromthev 4 года назад

Wow your channel has grown a ton Brian! I can't believe so many people are interested in magnetism! Awesome!!!

@benlunn4006 4 года назад

I started watching your channel because of the laser video's, i subscribed because of all the fantastic content you have, you also have a very calm voice which is always a nice addition to videos, alot of people are very hyperactive on youtube these days. Your channel is fantastic!

@BigIggy 4 года назад

I'm always so excited to see your vids! Never disappointing, thanks for the great science demo!

@brainiac75 4 года назад

Glad to hear this one didn't disappoint either, Big Iggy. It was a lot of editing.... Thanks for watching!

@BigIggy 4 года назад

@@brainiac75 no *Thankyou!* Seriously, cabin fever has been driving me nuts! Not to mention, you always have fantastic experiments! I'd like to send some chemical elements to you btw. I sent some to Cody don from Cody's lab, and I'd like to send some to you as well. I have very fine, laboratory pure copper "sand" and I was wondering if you wanted to pour a sample across one of your huge magnets?

@justDIY 4 года назад

That's really neat! Thanks for the video.

@CertifiedGhoul 4 года назад

Love your videos. Relaxing and interesting. Thanks!

@kepler1175 4 года назад

Definitely loved this video and learned a few things from it.

@scott-alwayslovegloria 4 года назад

Awesome! I can't wait for this video!

@zachaliles 4 года назад

I have a serious issue with your videos that I don't think even you can, or want to fix. They're so interesting and in depth that 11 minutes flies by like a minute and I'm sitting here hoping for more. Thank you for such informative and interesting videos, keep up the great work!

@brainiac75 4 года назад

Well, I would actually like to make shorter videos, LOL. This one took what feels for ever to edit. Those 16 magnetic moments are hand-animated x) But I am glad to hear, that my hard work is appreciated. Thank you very much! More to come.

@zachaliles 4 года назад

@@brainiac75 I have no idea what goes into the editing process as the last time I edited a video of any kind was a high school project for AV club back in probably 2000. And that was on cassette tapes. But yes, your work is very much appreciated by me and probably a whole bunch of other people. Thank you for the effort you put into it.

@fmdj Год назад

This is really interesting! According to Wikipedia this method of cooling can be more efficient and reach lower temperatures (near zero K) than the more traditional cooling methods used by fridges and is commercially viable for extreme low temperatures, fascinating.

@vovacat1797 4 года назад

Why is the voltage so low in your house? Aren't there devices that would just refuse to run on a voltage that low?

@Roalethiago 4 года назад

Most modern psu works from ~90V to ~250V. But still, definitively he's on the realy low side.

@arcadia1701e 4 года назад

The local / street substation will be overloaded.

@tootalldan5702 4 года назад

As he saud, 3phase power source so 208 is normal in the US but house power is normally single phase and runs 240 VAC or 120Vac for my house. I hope this helps.

@thelamb288 4 года назад

Just thought I would drop you a line to hope you are well; and hope you make it to 1 million subs, soon-ish :D Cheers.

@dhairyajoshi_ 4 года назад

I learn so much from your videos everytime. Thank You

@brainiac75 4 года назад

Glad to hear! Thanks for watching and commenting :o)

@rabihalkaysi 4 года назад

Very nice. Thanks for explaining

@toddvolpe6396 2 года назад

This is very detailed and extremely useful for some. I give the video a thumbs up I never give videos a thumb down. I actually don't really understand the concept. Anyway I would have loved to have seen a less detailed version because when I saw the picture I thought okay he's going to explain how much power and and how fast and the amount of energy that it takes and the efficiency factor. Maybe you could do a 7 minute or 5 minute follow up video just including these things for the less sophisticated amongst us (meaning me)...lol

@epsteindidntkillhimself6581 4 года назад

I’ve never thought to try this with very big magnets. I always Induction heating was only feasible with electromagnets. (Even though it’s only a minimal change)

@brainiac75 4 года назад

The induction heating should be possible with permanent magnets too. But electromagnets are much more efficient since they can switch polarity so fast - around 20000 times a second in the shown induction cooker. I may attempt induction cooking with permanent magnets in a future video. Thanks for watching!

@SuryanIsaac 4 года назад

@@brainiac75 Then you need to make a device to move the magnet 20000 times a second. Best of luck, I'm curious!

@brainiac75 4 года назад

@Suryan Issac Not necessarily. Permanent neodymium magnets have way higher field strength, so polarity change does not have to be as fast. And by using multiple magnets arranged with switching polarities on a round plate, I can have several polarity changes on one turn. But I am pretty sure I will not be able to compete with the electromagnet in performance ;) Thanks for watching!

@userPrehistoricman 4 года назад

Using a motor to spin magnets is an fun exercise in inefficiency.

@Jp-ue8xz 4 года назад

This is awesome, you deserve way more likes :(

@jay1st1st 2 года назад

Been using induction for over a decade now, and it has a lot more control, less inertia and perfect control of the temperature. And I even have a "portable" induction cooker for outside and it has a temperature management for milk, frying, deep frying and boilin water. It's always and the correct temperature.

@55Ramius 4 года назад

Very interesting video !

@JensLyn90 4 года назад

Du gør det sku godt :) skønne videoer du laver!

@AluminumOxide 4 года назад

Another great reason why I love magnetic induction! its quick, energy efficient and cool to use!

@aarongreenfield9038 4 года назад

Not cool, hot.

@brainiac75 4 года назад

Absolutely! I will without any doubt switch to induction cook tops when my current stove burns out. I will however need some better cookware. The ultra-cheap cookware I bought for the two latest video have a horrible, high-pitched whine on the induction cooker. Bad bonding and design I guess. Thanks for watching and commenting so fast once again!

@qpox 4 года назад

@3:11 maybe use a cable other than 2x0,75mm2, it should be at least 1,5mm2 for that power. And should help on the voltage drop. Also heaters, should always be pluged into a wall socket. Love your magnet videos :)

@marcmarc172 3 года назад

Excellent!

@SoulFoxie 4 года назад

Today's my birthday so I really enjoyed this birthday of a video,I love all these videos,I just wish I could be a patron for you

@nrr26000 4 года назад

Thanks for nice video. I wish you good luck.

@JamesThompson-xl4yu 3 года назад

have you considered the temp sensor has a small current through it that the large magnet changes it and result in a change in temp reading?

@UndercoverDog Год назад

Good video

@abdulazizaljuaid2888 4 года назад

Where did you get those nice samples in the metal tin?

@JoonasD6 4 года назад

Since the external magnetic field rotates elementary spins in the gadolinium, wouldn't that be work done onto the system and thus contribute to the heating in addition to the lattice properties?

@RaExpIn 4 года назад

I love these experiments with magnets! A few thoughts: Wouldn't a fridge, based on the magnetocaloric effect, slowly lose is cooling ability? The change of the magnetic domains takes energy and I suppose it comes from the magnet inducing the magnetic field. So, wouldn't a magnet after let's say 2 million cicles slowly lose it's magnetisation?

@casperunnerup 4 года назад

2.48 heating plates on your stove are also "just" 230V and somewhere in between 5-9 amps each. Stoves in Denmark typically receive 3 phases. But each phase goes to a different part of the stove. Phase 1 to two of the heating plates. Phase 2 to the other two heating plates and phase 3 to the oven. All 3 sections run on 230V

@weedfreer 2 года назад

I wonder...if you were to mount the Cado-whathisname in the end of one of them springs they use behind doors to stop them opening too far...then mounted it between 2 magnets then pinged the spring, would the cooling effect be greater? 🤔

@Edgard28Fe 2 года назад

can you do more vids like this?, i would like some performance test of more housewares

@zorancavic5139 2 года назад

Hvala!

@Nyxiality 4 года назад

RU-vid NOTIFS!!! When Braniac uploads a video PUT SOMETHING IN MY NOTIFS!!!

@jek__ 2 года назад

How do these compare to a submerged resistive heating element?

@Ivan4es1 4 года назад

Crazy thought... I wonder... how Giant or smaller magnet will react on induction cooker? Atract, vibrate or demagnetise?

4 года назад

I imagine that induction cookers run a lot of field lines in changing directions next to each other, so the magnetic forces cancel out over the whole surface of the stove. The magnet would likely just be heated like any other object, but when permanent magnets are heated, the material gets softer, allowing the magnetic particles inside to rotate so the magnet is demagnetized.

@flxmkr 4 года назад

Hey! I wonder if this is how my electric tea kettle is boiling my water? Is it using magnets? It’s super fast! I even use it to boil water before adding it to the stove so it will boil faster.

@gnarkill5814 4 года назад

could you make the metal in to a wire and run in a loop go8ng through a bath of coolant

@mibars 4 года назад

I see that you are using Voltcraft Energy Logger 4000. I have Energy Logger 4000F and I struggle to read data from the SD card using that crappy software that looks like a stripped off piece of dedicated software for some more complicated laboratory equipment. Have you tried using this function?

@brainiac75 4 года назад

I only just bought the energy logger and haven't tried the SD card transfer or even installed the software. But I was surprised to see the software came on a mini CD... A blast from the past I haven't seen in ages x) Thanks for watching!

@MrMiki434 4 года назад

Finally we can see the knowledge from a statistical mechanics course put into practise

@itsevilbert 4 года назад

But you would stack them in series so that there is a temperature differential across each stage. A multiple stage device could easily use a 1 degree drop in temperature to convert mechanical motion into useful cooling. With enough insulation in theory, you could have a gravity powered freezer, a bit like a GravityLight :)

@victoryfirst2878 3 года назад

Would using induction to heat a home be more efficient than using electric resistive instead ??? Thanks

@fishyfool 2 года назад

I have an induction hotplate, it's like cooking with gas, without the gas. Temperature changes are immediate, and it works great with cast iron.

@sparty94 2 года назад

interesting video.

@johnM-Jr Год назад

Where can i get an induction cooker?

@ger13nunyah56 4 года назад

Nice

@JohnSmith-td7hd 4 года назад

Does it save money to get a magnetic stove instead of a resistance stove?

@bandishrup9698 4 года назад

Awesome

@sijonda 2 года назад

I'd like to see a comparison of induction vs natural gas. The cost difference will definitely be relevant but that's specific to what is available to you. I'm asking about time here.

@thomaskn1012 2 года назад

Hi Brainiac75, can you do an episode on magnets and how Electric Vehicles use them for torque/thrust?

@x9x9x9x9x9 4 года назад

I really want to get one of those induction heater hotplates. They are really -cool- hot.

@Basement-Science 4 года назад

They are not expensive. Get one with plenty of power though. At least 2kW if you can (Or 1,5kW in the US I guess?).

@specific_pseudonym 4 года назад

You might find this interesting: Even if the temperature of the gadolinium is lower than that of its environment pre-removal from the magnetic field, it will *still* release energy into the environment after you remove it from the field. The reason for this is twofold: You have stored potential energy in the lattice, and extremely low entropy. Every bit of lost potential energy results in more possible states. This means that the typical rule of "coupled systems will always move towards one another in temperature" doesn't apply here - at least not right away. It's hard to perform this experiment, but it has been done in the lab before.

@trafalgarsquare9019 4 года назад

Cuando metí un magento a una olla con agua y lo puse a hervir el magneto aumento su potencia

@johnnyj540 4 года назад

Ever since you put those two big magnets together I've wondered where you store them.

@raulsalcedo8332 4 года назад

He puts them inside each of his pockets. Lol.

@dermitdrApe 2 года назад

that extention cord does not look like it got a large enough diameter to support such big loads - hence the pretty substantial voltage drop and the significant difference between voltages between the two cooktops. Considering Denmark has a line voltage of around 230v i'd definately not use that cord for high power applications. just mentioning!

@dolamskudoiski306 3 года назад

Wait reversing polarity would heat it up more?

@bdf2718 4 года назад

The power consumed by a resistive heating element doesn't vary as much with voltage as you implied. The heating element has a positive temperature coefficient of resistance. Which means it tends to compensate (at least a little) for voltage variation. At a higher voltage than you were running it at then it would have become hotter, which would have increased the resistance, which would have decreased the current, which would have decreased the power, which would have lowered the temperature.

@Ender_Wiggin 4 года назад

I can't wait till we have refrigeration systems based on this.

@VoidHalo 4 года назад

We probably won't, since they would be more expensive to produce compared to a fridge that just has a compressor, a few tubes and some liquid. It might become some sort of a niche application, but I can't see it replacing traditional refrigeration any time soon.

@BobWidlefish 3 года назад

Bismuth should show warming from a magnet. Very slight. Strongest effect will be near the top/bottom edge, the rims of the magnet.

@fireandcopper 4 года назад

Here in Canada and I guess the US it's faster to boil water in a pot on the stove vs. the kettle. The kettle is 1500 watts, it's alright but not nearly as much as the stove top, now I know why

@Tjousk 4 года назад

Neat

@SolarizeYourLife 2 года назад

What if you put the gadolinium on a swing over the magnet?!?

@ericpham3751 2 года назад

Cold fusion happen when the induction on material inside the DC magnetic field make it cool down and fusion while heat is extract and transfer to the emf coil so just like get more energy than it put in because the heat generate more energy on the coil while extra cool down the material and increase it density

@h7opolo 4 года назад

9:30 i need a quiet fridge. this technique sounds promising.

@just_noXi 4 года назад

0.1°C = promising? it's a phenomenon that is barely measurable

@vgamesx1 4 года назад

Well it isn't quiet but you could get a chest freezer and turn it into a chest fridge, they stay cold a lot longer than a normal fridge/freezer basically meaning less noise.

@Basement-Science 4 года назад

@@just_noXi In a proper setup you can go much lower. You just need to speed up the cycle to move more heat and also reach lower temperatures.

@just_noXi 4 года назад

Would be nice to see a Type K thermometer on the Magnet. 🧲 🌡️

@AcidTehObjectThingyIsBack 4 года назад

Woah. 3 Categories during intro!

@killrb13 4 года назад

Where's the induction cougar? 😂

@furonwarrior 4 года назад

Why not use a drill to turn it faster? Very good and educational video

@gustavgnoettgen 2 года назад

Another way to get water hot faster than just on a regular stove is to use an electric kettle. They have even less mass to heat up. I'm still not sure which one is faster, kettle and induction or induction only.

@krollpeter 2 года назад

Should have used the induction cooker's wattage setting closest to the resistance cooker.

@PillsWontHelpYouNow 2 года назад

Gadolinium is bad at holding current due to its low curie temperature. This means it is more likely to radiate energy as heat. This explains the magneto caloric effect.

@minhquan2216 4 года назад

I love his voice

@picgamer9937 4 года назад

With my vibrator my body starts to warms up What could be the possibly the cause of it?: My Brain: *𝗠𝗮𝗴𝗻𝗲𝘁𝗶𝗰 𝗠𝗼𝗺𝗲𝗻𝘁𝘀* Random Guy: 𝗜𝘀 𝗶𝘁? Me: 𝗬𝗲𝘀.

@hobomnky 4 года назад

cool

@rogerscottcathey 4 года назад

It would be interesting to see how a natural quartz crystal responds in the field.

@dinitroacetylen 4 года назад

When you immerse a paramagnetic into a magnetic field, magnetic spins of individual atoms suddenly gain an additional component of their thermodynamic free energy. This magnetic energy is at positive maximum if an atom's spin has directly opposite alignment to the field, and at negative minimum when align directly along the field. Since initially the atomic spins are oriented randomly, the net energy change just from introduction of a magnetic field is zero. But when the spins finally align themselves, a considerable drop in thermodynamic free energy occurs. The energy that the system sheds has to go somewhere. Part of it is expended as mechanical work (pulling gadolinium towards the magnet). However, due to the existence of entropy, some of the ejected free energy has to be converted to heat. Heat capacity remains immutable (it changes slightly with temperature, but otherwise it is pretty much set in stone). ... I take it as that Brilliant.org does not offer courses in thermodynamics?...

@aesthetic_dude795 4 года назад

Yay

@acat.793 4 года назад

How to boil water without electricity?

@brainiac75 4 года назад

I may attempt induction cooking with permanent magnets. It should be possible with a hand crank spinning magnets arranged with switching polarities. It may be a lot of work to operate though - heating me more than the cookware :) Thanks for watching!

@Dmanthepowerful 4 года назад

Fire

@Baleur 4 года назад

How did nobody reply "fire" yet? xD

@ondrajavorik1580 4 года назад

Me with a gas stove: Easily

@acat.793 4 года назад

Your welcome

@Born_Stellar 2 года назад

this guy has 3 phase 400v in his kitchen? or is that normal for whatever country this is? thats commercial aircraft levels of power.

@g.s.3389 2 года назад

it would have been nicer if you added in the comparison the fas cooktop.

@Sergio_Loureiro 4 года назад

You should also put a gas stove in the comparison.

@thomasraywood679 2 года назад

how MUCH faster, brainiac

@seanlavoie2 2 года назад

Is induction heating ever used for water heaters? If not I wonder why?

@imnotbeluga007 Год назад

A water heater would consume crazy amounts of power as it's heating that water up - insulated heating elements are cheaper and less powerful. But then again, the higher power is drawn for less time.

@Shadow_of_STLKR 4 года назад

Still my 1600W Resistive Kettle cook faster than my induction 2000W You should test it with already heated plate. If you wanna cook long resistive should be more efficient bcs its changing all power into heat without apparent power

@iambadatsomefunnies5572 4 года назад

Pronounciation of archaic is archake

@-AnyWho 2 года назад

I just wonder how this would have compared to nuking the water in a microwave instead? I mean i nuke a cup of water in the microwave all the time for instant coffee or tea ... takes like 1 minute and 30 seconds to get it hot from cold or 2 minutes to get to a rolling boil for a mug of water in a 1000 watt output microwave ... I'm not math friendly so i can't even toss a few figures around ... just curious

@HifiCentret 3 года назад

The comparison between the induction and old school hot plate isn't fair. First of all you're using the small hotplate. If you used the larger one the current draw would have been more equal. 2nd use an outlet that doesn't sag as much. Sagging voltage has a bigger influence on a resistive heater than induction. That said I still think that old school hot plates has their uses. They have much more thermal enertia for that delicious steak - made the old fashoined way in a cast iron pan. And should you get the urge to make dumplings (æbleskiver) directly at your table then of course you can use a dedicated apparatus (and space needed to store it when you're not using it the 360 days of the year) or you can just use an "apple washer pan" and a hot plate. Sure it is a little slower warming up but it has no noisy fan in contrast to the induction cooker. Just a "cosy click" once in a while. Perfect when you just want have cozy time with friend and family and eat some fresh made æbleskiver. Also great for many other things which you don't want to use your stovetop for. If you like making your own candles etc. Again it's annoying having that noisy fan. So trade a little warm up time for silence. Beside they're also cheaper and probably also sturdier so again a win for messy usages. The induction cooker in contrast is great for many types of everyday meals you need to make fast and thereby noise isn't an issue.

@someoneelse318 2 года назад

To be fair, the conventional cooker you were using seems to be a fairly weak represantative of it's kind. Undoubtedly the first step in heating up itself is inherent with conventional cookers, but with a decent quality brand device the advantage in speed would be not as huge as to be seen in your test.

@Hagledesperado 4 года назад

I would call an electrician if I were you. 215 V may be within spec - maybe - but a > 15 V drop under load seems excessive. Do you have very old cabling? In your situation I would be slightly concerned about fire hazard.