A refrigerator that works by stretching rubber bands
ฝัง
- เผยแพร่เมื่อ 7 ก.ค. 2024
- Handheld CNC router: shapertools.com/
Rubber band thermodynamics: en.wikipedia.org/wiki/Rubber_...
Rubber band bicycle wheel: • The Rubber Band Heat E...
Thermal camera in this video: Opgal Therm-App 25Hz:
www.therm-app.com/ Let me know if you're interested in seeing more detail about this device in a future video.
Support the creation of Applied Science videos: / appliedscience - วิทยาศาสตร์และเทคโนโลยี
Infrared confirms that your mustache is relatively cool.
I'll frame this comment and put it on my wall.
+
Haha. Perfect comment.
athangyu
Top 10 best comments 2017
A rubber-band powered refrigerator is a bit of a stretch...
omg....that pun
Standard-Issue hah. ha. haha
lmao clever
I groaned so much I think that actually hurt.
clickbait
You violated the first rule of thermodynamics! We do not talk about thermodynamics!
I've always heard about that, but I don't know where that reference comes from. :[
MrFlippy Gaming Fight Club; Starred Brad Pitt and Edward Norton (back in the late 90s I think). The first rule of fight club is: WE DO NOT TALK ABOUT FIGHT CLUB! Give it a watch!
Thanks, Ronnie!
The first "rule" of thermodynamics is the application of the conservation of energy principle to heat and thermodynamic processes i.e. the change of internal energy of a system is equal to the heat added to the system minus the work done by the system
RisingNinjaMC joke shitter of the day
Damn that handheld cnc tool is amazing
Quack quck
That hand held CNC router is the coolest and most practical machine I've seen.
Thanks! We started pre-sales today! There's more tech specs and videos at shapertools.com
+Shaper US only....
@Shaper : Does it move itself around (X,Y) via motors? Or is that passive? Either way, it's very neat.
that thing is magic voodoo... one of those things that actually makes me feel I'm living in the 21st century.
Do you have any plans to add a Z dimension or does it currently support the Z axis?
I've always wondered if that was possible! Excellent project!
Hey Cody, you watch applied science too? Small world
hey cody! your channel is great keep it up, i learned alot from it!
Now pull rubber bands in a vacuum
Hey Cody.
hey its cody
I see a lot of people are missing the crazy ass router device that takes a general pass and making a perfect cut! That is cray cray!!! Well I'm a carpenter so I'm impressed.
Think of the fjords you could design with one of those puppies
sick piece of kit eh
After taxes it's over $3,000 so you'd have to be more than a hobbyist to justify that. I bet if they could have gotten the price point down to 1k a lot of DIY purchases would happen. But it's a PRO tool as is.
@@PowerScissor But at $3k it will keep it out of enough hands to where it might possibly be easy to make some money off of it. You might even get it to pay for itself. If it was $1k you'd have a ton more competition.
I wonder about the variety of materials it can cut. Would be awesome if it can do acrylic, plexi glass, prototype circuit boards, 1/16" steel/aluminum/copper, cardboard, various natural woods and engineered woods, modern composites like carbon fiber. and plastic/petroleum based materials. Then your options are limitless...raspberry pi cases, phone cases, brackets for commercial, residential, and automotive applications, guitar pedal boxes, mini solid state amps, customized storage & organization containers, protective cases, custom heat sinks, and so on. And those were just what I could think of in a couple minutes...
Man guess my savings account is taking an extra $3k hit this christmas. How did this happen... I just came here to look inexpensive rubber band project builds..
I'm not a carpenter or anything like that, but the moment I saw that router I had to google it immediately to see if it were even a real thing!
God bless this man for using metric units
I don't understand It needs to be in football fields
How original.
The metric system only exists so that the French can accomplish administratively what they were unable to do on the battlefield!
@@fredfrancis5221 You must mean being smart and progressive. I don't know much about French warfare, but I do know what 95% of the world population think of Imperial.
*Only 18* 👇👇👇
490116.loveisreal.ru
Very cool demo
Thanks!
yall need to add some information technology into this string
+Applied Science I want that CNC router.
IT guy here, can confirm this video was cool.
Watching American scientists use metric measurements makes me very happy
I wonder why that is? Why something like that tops getting laid, or having a chocolate shake for you? But on the screen of his router by Shaper Tools, at 3:43, I notice it says his bit diameter is set at 0.125 in, his bit offset is set to 0 in", and his cut depth is set to 0.125".... then at 4:07 he refers to "half inch thick plywood", guess you better call the police and report him, then find you a girlfriend.
Ed West Wow, I had no idea such an innocuous comment could incite such a snarky, pretentious response. It was a friendly jab at my US friends for (mostly) still using the imperial system. I had no idea it would ruffle someone's feathers like this. I think you need to go for a walk, Ed.
Ed West Do you feel better now, Ed? Has your life improved now because of that comment, Ed? Someone's cranky; maybe it's time to take a nap, Ed, you silly geezer, you. Feel free to write an apology to Daniel in the form of a haiku after you wake up.
No ruffled feathers here, I just honestly wanted to know why or how it
matters to you what system of measure someone else uses. As a printer,
I measured length is picas, and points. A unit of measure is really an
arbitrary meaningless thing, as long as you understand it, you could
make up your own unit. We don't call it imperial, we call it Standard.
But yet there just seems to be this "outrage" that America has not made
the metric system the daily driver of units of measure. And also, maybe you can clarify the incongruity of using the word 'innocuous' and 'jab' to describe the same action.
Ed West He is correct in his usage. You, however, are a douche.
"You can try this at home"
"Go to your office drawer"
Got it.
When you're in thermal vision you look like Vladimir Lenin
It looks like bald pennywise
You’re right
@@alvinxyz7419 ...posessed by Lenin's ghost
Actually, lenin is a lot colder these days.
@@alvinxyz7419 he looks like Lenin in the visible light spectrum as well
Whoa, it's The Slingshot Channel meets Matthias Wandel!
I almost said the same thing. I'm glad others have the same broad tastes that I do.
Matthias Wandel is awesome, I don't even do woodworking or is interested in it at all.
I am now due to him.
SsoulBlade
Same here X'D
Well actually I really take a liking to having lots of woodwork in houses. I'm a fancy-pants kinda guy lol ... or I guess you could say "artistic" or "expressive" XD
Didn't use Matthias Wandel's gear generator though lol
+
I think you're making a wrong assumption. For when you stretch the band, you're assuming an expansion. But I would challenge that and say it is only an expansion in one direction... lengthwise. But if you consider a cross-section at each extreme, I'm sure you would agree that the cross-section of the stretched band has greatly contracted.
What I would really like know is whether the volume of rubber is the same or less when fully stretched. I suspect it is less, and the space between the rubber molecules has been reduced. So when stretched, the band temp changes towards a room-temp equilibrium... then holds that level of energy... and when un-stretched, the band volume increases, just as the cross-section does, and that stretched band energy then gets dissipated into the greater volume, which means a lowing of temperature of each molecule.
I was thinking the exact same thing. For a given volume, as the length in one direction increases, the area of the cross-section decreases, approaching zero, taking the total volume toward zero. Reducing volume (compressing) increases pressure - exothermic. The opposite, of course, when the band length contracts, is when the volume increases to a maximum, and is endothermic.
The description in the video sounds like spiritual hocus-pocus. Except, of course, the law of conservation of energy (work goes in, something has to come out).
www.feynmanlectures.caltech.edu/I_44.html#Ch44-S1
Astérisque Etpéril Okay, so it's the law of conservation of energy, and this; _"The detailed mechanism is so complex that we cannot, by kinetic theory, really determine exactly what happens"_
I'd bet that I'm right.
8literbeater Just read the thing^^
Makes perfect sense. Thanks.
2C cooler?
So all we need to avert global crisis is a very big one of these.
We'll need somewhere to dump the heat
@@hanro50 i vote west virginia
@@sci_pain3409
Why not South Virginia?
@@hanro50 East Virginia
@@sci_pain3409
Lets scap that idea...
The whole Virginia
I’m glad that there are people like you out there wasting your time, so that I don’t have to.
Applied Science hasn't made a video in a while. Applied Science has been busy. Applied Science works at Valve. Applied Science has been working on HL3. Applied Science is done being busy. HL3 confirmed. Also there are triangles everywhere.
I've worked at Verily (Google Life Sciences) for the past couple years, so I can't have anything to do with HL3.
+Applied Science that's exactly what someone working on HL3 would say.
Haha aww...
Also, the spanner in the channel logo is 1/3 above the top of the flask. Once again, HL3 confirmed.
he left valve awhile ago
I can't put into words how impressed I am. I envy your mind and your willingness to follow through. I'll stop now before my man- crush becomes obvious and this gets weird.
hahahahaha!
Sounds like you want to stretch some rubber.
Nearly pissed my pants from laughing 😅
But yes. Great video - as usual.
Ahahahaha X'DDD
gay
so nice to have something recommended on youtube thats actually worth watching...very entertaining and educational. this is the stuff i wish we could have had back in school. i do vaguely remember playing with rubber bands back in the day and noticing the heat cool thing, but you never really think about that stuff, until years later someone brings it up like this.
I took thermodynamics last quarter as a part of my engineering degree. I love how you explained why the band gets colder in a way everyone can understand. I was wondering how you were going to explain it at the end and you did a fabulous job. subscribed
A NASA tech brief from 1970 describes such a "manually operated elastomer heat pump": ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700000259_1970000259.pdf
I think the NASA design allows for adjusting the tension on the rubberbands by screwing the rods further in or out of the disc.
Nice video btw.
Great find! The tech brief says NASA even patented the idea :)
+Applied Science I found it linked in one of the comments on a post discussing this phenomenon at the physics stack exchange
physics.stackexchange.com/questions/54738/rubber-band-stretched-produces-heat-and-when-released-absorbs-heat-why
wow! do u have more of this inventions from NASA? I find it very interesting
Wow.!
Try spraying water mist on the hot rubber bands. If you cool the stretched rubber bands with water you can actually get the water to freeze when the rubber band contracts. Works well with balloons.
Just the mere fact that you discovered a thermodynamic property and acted upon it is commendable. Your design and rendering of your prototype is exceptional as well and the tools you used to make it happen are state of the art too. I think Tesla would have liked you. Keep up the good work man. It's guys like you that make things happen.
Who the hell do not like this amazing video?
The level of practical and scientific content is impressive. Thank you so much :)
did he make a real refrigerator? will you make one for yourself?
did you, at least, learn why real refrigerator is better than his?
just asking...
when i was younger I used to stretch a rubber band and then put it on my lips. I enjoyed that it got cool every time i released it. You just made me remember that lol
Hey! I've been watching your videos for a long time now, and they have had huge influence on me working on my projects. And now I've been offered an internship at Google ! Thanks for the inspiration Ben
I'm glad to hear it! When you start your internship, look me up in teams and shoot me an email.
woo nukes as icons.
The simpler explanation:
When you compress any gas, you're adding to its potential energy. The air heats up.
When you stretch a rubber band, you're adding to its potential energy. The band heats up.
Yea basically, that and you are reducing the space that the molecules have for playing therefor rising the posibility of a collision and the the temperature, it sounds weird that that works in a rubber band but if you think about it in that way, it makes sense.
Thanks
Sorry, but that's not how it works. The heat energy doesn't translate to potential energy in elastics like rubber bands, unlike gasses.
@@orbitalvagabond7371 no that's the point you stretch them out (higher potential energy) and it comes back to gether which lowers potential energy raising the temperature. I think that's what he meant.
@@guillaumethemapler no, he meant an increase in potential energy is stored by increasing the temperature of the material, which isn't a thing outside of fluids. Interestingly, he might be sort of right that the force that increases potential energy does directly add energy that is expressed as temperature, but that's likely not the main mechanism here, nor is any temperature increase significantly translated back to potential energy (analogous to friction: you add energy, which increases temperature but doesn't effect potential energy). What you suggest would work only if the band does work to itself (i.e. it's not attached to anything when it contracts), and even then it competes with the cooling phenomenon shown in the video, which more has to do with degrees of freedom in each polymer molecule.
I don't know if you've ever mentioned it or keep your profession unknown, but are you a teacher outside of youtube? Your deep dives into experiments and weird technologies are so damn thorough and educational that it scratches the itch for learning that's been haunting me since college.
Thanks so much for what you do, I look forward to every single video...and excited for you to hit 1M subscribers soon!
it literally looks like something from a dr sues book
*seuss
There's a lawyer joke in here somewhere
I love how almost every time you make a video it's about something I either never heard of, or never knew how it worked.
You are a huge asset to my subscription list!
That was a genuinely pretty cool idea!
OMG thank you. I tried to do this with Erector Set parts when I was ten. I realized I didn't have the technical know-how to seal it up so that I could capture the differential. I tried cooling a trickle of water...but ran into problems with the metal parts. Of course I didn't have thermal imaging in 1960! LOL Thanks for the proof-of-concept project.
Cascade these until you can chill your beer!
You never cease to amaze, thank you for all your videos.
I want to hear Jörg Sprave laughing and saying "Let me show you it's features"
I just come home late, holding a can of beer - and let my GF stare at me for 10 mins tapping her foot.
Temperature of can and room drop by about 10 degrees Celsius.
Thermal camera indicates temperature of GF's head rises by about the same.
GaryChap not to mention the rise in temperature of heads of the neighbors getting irritaded by all the tapping they hear from above. Btw where can I get that magic beer that just gets cooler over time?
haha
That makes no sense.
But... muh entropy...
awesome comment
Very "cool" :D
(groan) :)-
+Deathlok67 ಠ_ಠ
Uh dur hur hur...
Yes, it's cool, but a refrigerator ran on rubber bands? Kind of a stretch!
Tomaz He's not pulling your leg!
Perhaps you can try building it in reverse. The unstretched rubber bands being stretched on the inside of the fridge to absorb heat and the stretched bands contracting on the outside to let that heat go.
That's... not how this works.
Like a microwave... I think the greater surface area of the rubber bands would help.
What if you ran this under water?
conservation of energy.
A fridge works by removing heat from a system and transferring it outside of that system (Into the room). If the rubber bands absorb the heat of the insulated box when stretched they should be able to release it into the room while on the outside.
ProGamer1515
There in the problem lies.
The bands can only leave the box by ways of a large opening, you would have only a slight tempreture difference.
And you can't enclose the box fully as the heat would have no where to go.
The NASA design uses a "cooling fluid" and that fluid is used to cool the fridge. But the mechanism involved is messy and complicated and possibly either toxic or flammable....
I'm a Mechanical Engineering student and this is one of the coolest things I've ever seen (no pun intended). You are a brilliant mind! Even if it doesn't work super well, it's incredibly neat.
I love the way you teach us about things that nobody ever even realised they needed teaching about, I love this channel
THANKSGIVING
There is another cooling effect produced by sucking on a straw creating a high frequency vibration at the tip, discovered it when i was a kid 40 years ago.
Really cool aesthetic on that thing! Great project.
Awesome idea. It makes total sense to me (lifetime of being heavily absorbed into the HVAC field).
When stretched , the molecules come closer together (compression of molecules) creating heat. Once this heat has been dumped into the air, the releasing of tension allows the molecules to expand, causing the “cooling” effect. Obviously the same thing happens with refrigerant as far as molecular density/energy.
Nowhere however had I saw someone put this together as you have. I suspect the gas compression style would always win out though, due to both styles still needing input power.
The observation of this effect is incredible and I appreciate it greatly! Helps keep things fresh!
That handheld router looks absolutely amazing.
I'm absolutely speechless! The world needs more inventors like you Mr. "Applied Science"! Great job and a huge thumb up by me!
boilingaction ki lfgkkhkrp
Agreed 100%!
boilingaction I totally agree with you.
CRINGE
Peter simino did you literally just punch your IPad!?
Hi Ben. I'm a huge fan of your videos and I always watch one vid every morning. And today is a very sad day for me since I have watched every single vid from the very beginning up to this one. There are a couple other similar channels like NightHawkInLight and Cody's Lab, but I find yours to be by far the most interesting. Please do continue your work and I'm waiting for updates on ruby laser, high-pressure chamber, gecko tape, etc projects. Even if you havent achieved a huge success with some of them -- it's still interesting to learn even from negative results.
Thanks! I really appreciate it. I've been pretty busy with work, but there will be more videos in the future.
I just want a mega rubber band AC unit
Alexander Sannikov @
Its really inspiring watching inventors doing their own projects like this. It really does give me hope. Please keep up the awesome work AS.
Such a great teacher. Covers all the points to help you understand. And mentions things you can look up instead of going off on tangents.
Surgical rubber might be a better alternative to rubber bands.
every video this guy makes is great
other than the cool demonstration, I really liked how you explained everything. amazing, and thank you.
This is fascinating. Once high energy rubber technology research gets under way there are myriads of possible applications for this. Thanks for a a very interesting post.
Instead of using multiple bands, why not use one long, thick rubber band. Outside the box the band can be stretched over a hollow metal roller with a fan inside (ideally to transfer heat off the band quickly) but have the band go inside the box via two pinch rollers (one for send and one for return) in order to make it so that the band has high tension outside, and hangs loose or almost loose inside.
The pinch roller going into the box will be where it becomes loose, lowering the temperature and allowing the band to suck heat from inside the box, and then the pinch roller coming back out will be where the band gets stretched back to becoming hot, where the large metal roller can make it quickly equalize temperature again.
You could probably use a very long and wide rubber band and get a lot more surface area for the heat transfer to occur, plus you'd need a lot less gearing and crazy stuff. The major challenge I could see would be tensioning the pinch rollers such that the band can actually move smoothly, but be able to maintain two significantly different tension levels on the different parts of the one rubber band. (Maybe some kind of pulley system, or some ratcheting system similar to an old movie projector could be more effective)
What a wacky project. Thanks for doing this experiment for us. Liked the Frantone shout-out in the background. 🙂
Had to go back and look an there it was. A Peach Fuzz!!
To this day I still think about this video. Such a beautiful display of material mechanics. I can’t believe all this fit into less than 8 min!
What a great physics demonstration, and beautiful craftsmanship. Way to go, dude.
He looks like Lenin in thermal vision.
But so true
Seize the means of refrigeration.
one angry marxist -____-
Held rubber bands to lips. Lips severed.
lel
I didn't know this rubber band phenomenon, thanks for sharing. Great wood working result!
Great channel, just discovered it and am quickly working my way through your back catalogue, keep them coming.
can you do it through multiple layers? Like the outer system cools the inner one and the inner one cools the inner inner one and so on?
Positively fantastic vid. Loved it. Great explanation, excellent designing, nice craftsmanship and very well presented and produced video. You guys should be on TV. I enjoyed watching.
I did not know those type of CNC router guides existed. Seems a bit too expensive for me right now, I need a proper CNC machine first, then this would make for a nice addition. Very neat product, wish I could afford one! Also, this refrigerator is ingenious! I had never thought to use a rubber band this way- I did know about the heating cooling trick though. I'll bet other rubber like materials behave in similar ways- gives me a lot of ideas :D Great video!
I'll bet with a more refined version using insulation and figuring out how to seal the gears up so that air didn't enter/escape you could get a few more degrees out of it. It's about removing the heat, not putting cold air inside, you should be able to get close to ambient without refrigerants and compressors. The larger the cooled surface is, the more heat it can collect, the more efficient it'll be- so more rubber bands and maximizing how many rubber bands are inside the box at any given time would help a bit too. It'd be neat to try to design a highly optimized version of this- maybe some Day when I've got both time and money to burn I'll try to make my own- who knows if I'll ever have the money part though :P
I watch SO many woodworking vids on youtube, and have NEVER seen this handheld CNC router! What is this sorcery!! Subbed and liked as a result! Awesome!
It was the first video what I saw in your channel few years ago, and the elasto-caloric effect is a really cool phenomena. I'm planning a different version of cooler as yours, but with the same effect of the natural latex. I look forward to the continuation of your video, but unfortunately it's not happened. :( But you've made a tons of interesting others, of course! Congratulation for your works! BLADE
Roy Hinkley would have given his left coconut for such knowledge.
Who's that
The professor on Gilligan's island.
Thumbs up if you knew who that was without the spoiler!
+John Długosz 🍗
I'm sure he likely used that in some capacity. Doesn't do much for fixing a hole in a boat apparently.
I love your approach in this... I wonder, so I'll build it. Beautiful.
Came here to see the rubber-band fridge, ended up getting completely sold on the handheld CNC router. Well played, Applied Science, well played.
That was seriously awesome. Subscribed.
And so is the router! Hmmm....
the bigger the better... hold it up to your lips... now if you stretch it really hard... blow on it...
You are? That is very brave of you to announce yourself, Dramawind! It is Pride month after all. Good for you, Dramawind! I celebrate your identification as homosexual!
I... um. I don't like dicks.
Wow this is why humanity is doomed
It's this some secret code from national treasure? What am I missing?
Insta duck face
BUILD YOUR OWN REFRIGERATOR! - SOLID STATE TEC
th-cam.com/video/YWUhwmmZa7A/w-d-xo.html
Testing
th-cam.com/video/cw8ipUYodkE/w-d-xo.html
this is proper youtube content. not like those lame channels that basically take material off other channels and recreate it as their own just for a quick buck.
You need a better insulated box! I doubt that plywood box can sustain much of a temperature differential with such a low rate of cooling. Also, I hope those rotational parts inside the box are on bearings. Otherwise, I fear the heat generated from friction is working against the cooling.
If he did all those things you said it could drop another -2°C
WooferJr He also needs to sample the temperature a few different places inside the box with temperature probes and average them as well as doing the same thing outside the box and comparing the two for a proper measurement.
It's a proof-of-concept, not a beer cooler...sheesh.
@@brainmind4070 That's right, and if he would have done that, he would realize that he has actually accomplished the opposite of what he thought. He has actually created a heater.
@@Flatgod
No he didn't.
It seems like this could be made a bit more efficient. I was thinking one large rubber band that runs on a tape reel sort of device. It would be driven by one drive pulley. The wheel before the drive pulley would a drag wheel. With it tension set keep the portion between the driven pulley. That portion would be outside the fridge. With a fan blowing vertically across it and through a shroud. The same for the inside.
Really great video - the white heat from the shaft without bearings also cancelled some of the cooling effect. Really awesome video and prototype
omg im in love with that handheld cnc that things is INvaluable!!
That was great! I highly recommend checking out Richard Feynman's explanation of how rubber bands work (it's on YT). Looking forward to seeing the rubber band refrigerator v2.0 Ben!
i like that your using the Therm-App camera, i got to play with one and i think im going to buy it someday. this was a really wonderful video!
*you're, Mister Super-Genius ;-)
TH-cam is a village, isn't it? :D
The Post Apocalyptic Inventor yeah, a wonderful little virtual village. :D
I'm a fan of all of your channels!
Thanks! I bought the Therm-App 25Hz model, which is more expensive, and requires one extra bit of paperwork. It really does run at 25Hz, even 27Hz sometimes, but occasionally gets into a mode where it drops a few frames every couple seconds. I'm using it with a Nexus 5X and USB-C adapter. The folks at Opgal did not recognize the problem, and overall I'm happy with it, but I would think more carefully about dedicated thermal cameras vs. phone add-ons in the future.
I'm usually frustrated by the (lack of) quality on educational/instructional videos, but this is spot on. Well filmed and edited, not too long, interesting subject (that 'fridge even looks cool!)...nice!
Great video, decent engine design and fine explanation! On future redesign, I propose to add an identical box around the warm part of the engine to see the actual heat transfer by the engine between the boxes. (Without the experimenter's body heating the warm end up.)
I wonder if you can make like a computer case with this lol
This was really interesting! Any way you could do a redesign with metal parts and much larger rubber bands? I feel like you'd get significantly lower temps that way
Maybe the rubber bands can be specially engineered for the task.
Type and/ or mix of rubber.
Adding thermally conductive materials to the rubber, such as fine silver or copper powder or zinc oxide.
You would think they would incorporated the idea with a car radiator or the engine block, imagine they went another way.... or they haven’t thought about it yet. This channel is awesome!
Oh, I love this. The world need more people like you!
He's baaaaaaack
It's 2016 and we still have molecular segregation. Come on people, let's work on that.
It was really nice to see this. It's an idea I've had for a build, but the solution I have in mind is very different.
Nice demo!
2:30 That is a really pretty machine
Stefan Reich .
This reminds me of a thermodynamics quandary. If you take a compression spring, compress it, dissolve it in acid, where does that energy go?
My guess would be that as it dissolves, the molecules coming off of it, or at least some of them at key points, shoot off at higher speeds than they otherwise would. So it gets converted into kinetic energy, then shortly thereafter into thermal energy as it bounces around in the acid.
That's just conjecture on my part though, and when I read your question it made my head hurt for a moment, so I'm not gonna try to claim confidence in my guess.
@@chrishill601
Congratulations! You win a cookie! 🍪
Energy can only be turned into something else. In this case it gets turned into heat. I don't know the atomic process that actually generates that heat but your description is so eloquent, it's close enough.
Sorry for the headache, but it's nice to see there's some people that can still think in this world. 👍
It goes into *yes*
Same thing that happens to half the energy in a capacitor when you discharge it
@@researchandbuild1751 The energy in a capacitor all gets converted to heat when discharged into a resistive load.
Nice video and good explanation! That CNC handheld router is awesome!
Even though it didn’t work great, that was a really clever design, great work man!
that was awesome! even thou it just theoretically worked, maybe in the future someone will make the next step and use elastic material to shift thermal energy in one way or another. wouldnt it be cool if we could stop using poisonious gases for refridgeraters?
I guess rubber bands will pop too quick for any practical application.
Not rubber band but another elastic material with huge margin will works
Who else saw the beginning about rubber bands cooling and thought he would stretch a ton of rubber bands and release them to make the fridge
Very, very clever! I love applied science projects like this.
I thought of this when I was a kid and felt the cooling of a rubber band when it is released. Fun project.
Could you apply this same concept to springs: the energy transfer would be better and more efficient with metals than rubber?
no. it has to do with the entropy of the rubber band which consists of polymer chains. the rubber bands become cold when compressed due to Le'chateliers principle of equilibrium- in efforts to maintain equilibrium, when the polymer chains are forced to overlap more by compressing the rubber band, this increases the entropy of the rubber band. Temperature is positively correlated with entropy, as temperature increases entropy increases. Therefore, in order to resist the change, the compressed rubber bands become cool. This wouldnt happen with metal, as the microscopic entropy isnt a factor.
@@shaneprather4535 In fact metal springs would have the exact opposite effect. Metals get cold under tension and warm under compression (if they have a positive coefficient of thermal expansion). It's called thermoelastic effect.
@@redshifted8790 That‘s not the opposite, but the exact same thing happening in the video. The rubber band gets cold under tension. The visible drop in temperature after it contracted is simply the result of lower heat capacity per volume. But the same thing happened, heat escaping off an object = object cooling down.
@@heavycurrent7462 If you listen closely you can hear Ben explaining that the rubber band gets hot when under tension and cold when going back to it's original state (in consequence of the former heat exchange that acts as if it had been compressed).
The machine could also work with metal springs, but you'd have to build it in reverse. The stretching parts would cool the inner space down and the recompressing parts would transfer the heat of the refrigerator to it's environment.
(The reason for the reversed behaviour is as I mentioned earlier the difference in a positive or negative expansion coefficient)
Also: The obligatory "trust me, I'm an engineer" (of Material Science)
@@redshifted8790 I appreciate the time you took to educate me. But what if instead of constructing a spring in reverse, we use it in reverse? So instead we compress the spring out into the environment with a shaft to radiate heat away, and as it retracts back inside its temperature drops due to the exchange?
P/S: I believe you. I had to work since a young age not able to finish college.
id like to see you teach adam savage to build that. it would please me
.dearly.
ledger beats why are you concerned about the last time he uploaded?
geeeeze jamie! cant we all just get along
ledger have you confirmed whether hes okay?
Why not a straight up Sirtling Engine, used for cooking?
A stirling engine usually generates power in form of motion, through the transfer of heat, requiring temperature differential to work. However, if that motion is introduced in the engine instead of taken out, then it can generate temperature differential, the direction of rotation dictating whether it cools or heats.
Therefor, one could make a rotation-powered oven, or rotation-powered freezer, using a stirling engine. This could work very well with rotation from a waterwheel/watermill or windmill. So yeah, this could cheaply be deployed in places where there's either a water source, or wind source, or just a place where you have something to burn (so you can use a stirling engine to power another stirling engine that cools or heats, like for a freezer or oven).
th-cam.com/video/O7wQZSv0Jcg/w-d-xo.html
th-cam.com/video/ssvHGUlFokA/w-d-xo.html
That was a great demonstration and explanation! Thanks!
pretty cool experiment man, 10 points for effort.