Forced Convection with Solid State Piezoelectric Fan
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- เผยแพร่เมื่อ 16 ต.ค. 2024
- This video was uploaded to showcase PiezoFlo technology as a highly reliable solid state forced convection solution. It excels in actively cooling applications where:
1. Reliability is critically important
2. Electromagnetic interference or EMI is not permitted
3. A thin form factor is required
4. A dusty, corrosive, or extreme temperature environment is expected
5. where audible noise needs to be kept to a minimum.
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Please Note: We've released a video that answers many of our commentors' questions - and provides a deeper dive. Available here: • Piezoelectric Fan Adva... .
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Related Piezo Fan Blog Posts:
Advantages of Packaged Piezoelectric Fans: bit.ly/39Qu4eX
Best Applications for Piezoelectric Fans: bit.ly/3yV2szS
Case Study: Piezo Fans Trump Traditional Fan Challenges in the Oil and Gas Industry: bit.ly/3NrXrTs
Background:
During the development of the piezoelectric fan our customer required us to run some highly accelerated life testing (HALT) on a statistically significant number of samples. The test included thermally cycling the fans 1000 times from -40 to 125C while they were operating. The test took about 5 weeks to complete. There were no failures.
We also ran the fans through high temperature operating life at 180C (HTOL), low temperature operating life at -70C (LTOL), Over voltage test at 100% over the normal operating voltage, Humidity HALT testing, Cold start testing which included a hard start up after the fans soaked at -40C for 14 hours, high temperature storage tests where the fans were soaked at 140C for 1000 hours prior to successful operation, dust ingress testing, salt spray and fog testing and IP68 testing where we submerged the fans for 72 hours at the equivalent of 3 meter depth pressure and then operated them after they were removed and dried off. There were never any failures during any of these tests.
Lastly, I sit about 6 feet from a fan we have been running since June of 2016, If I really try to listen hard I can hear it running, but otherwise I don't notice it. Running at 60 Hz we have put just over 11 billion cycles on the fan without failure or change in performance.
To find out more please visit our product overview page at: goo.gl/plglMp
www.piezo.com: bit.ly/3yVNTMK
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Our response video is ready - please check out Rob's responses to your most common questions - th-cam.com/video/kFZnbc6hd8I/w-d-xo.html.
Thank you again for your interest, questions, and comments regarding this piezoelectric fan.
Quick note: Since this video was produced (over 6 years ago) Mide has spun off its piezo product line to its own individual site: piezo.com
I look forward to seeing more application areas. I want to see this used in processors
One small note though.
You claim no electromagnetic noise from the device, which is not strictly true.
yes the electromagnetic noise will be significantly less than any normal electrical motor, but however not absolutely zero, as the alternating electrical field applied to the 2 sides of the fan (which is driving the piexo-electrical deformation) will radiate RF noise (as any alternating electrical field will).
@@srenkoch6127 can the packaging can diminish that RF to not leak to outside so much?
@@theman3282 Yes if it is made to do so
@MirroredVoid No. Consumer computing does not need special fan technologies just yet when a simple spinning fan will do fine. Additionally, keeping a high static pressure with these fans is not easy with small objects like a ssd heatsink, which a spinny fan excells at
If it was "low noise", why no audio of it?
I use piezo fans just like these in some aerospace assemblies my company designs, and I can vouch for how quiet it is. Their noise is so negligible that in our acoustic testing procedures we don't even consider testing the noise output differential between when we have multiple piezo fans on or off. The only thing I don't like about them is that you have to supply 60Hz ~120V power to them, so integrating them into a low power electronics system that isn't powered straight from the wall can be difficult.
Because it is too loud
@@mangakker the comment above you states that their volume is negligible from experience and you, a random person that never seen the device says it's loud? Can you stop with the unnecessary comments?
it makes sound in the ultrasound spectrum, everything that moves makes sound.
@@FreddieTheRobot but it has moving parts. The oscillating fence that make air circulate is suffering from metal fatigue, or plastic fatigue, it would brake soon. I think. But i maybe wrong. Has it been tested in long time working??I would like that. I love innovation and technology
Interesting idea but isn't there after some time material fatigue from all that oscillation or small amount of dust build up that make it unbalanced to point of destroying itself?
there are materials - like steel - that can withstand an infinite number of oscillations if the stress is low enough
@@vaj1414 As I understood, the question was exactly about that - is that stress low enough to let device live as long as fan at least?)
I attached the piezoelectric plates to 1mm thick mica sheets, two on the same side acting to increase the overall airflow, the only downside observed was a slowing of the 50hz mains oscillation, because of the increase in air resistance on the mica sheet, however when all is said and done the fan measured six times the surface area of one oscillator assembly. Hope this spurs on some further tinkering! 😉
@@Zodliness
therapist.....the-rapist.
@@johnlockesghost5592 That just earned yourself a REPORT directly to 'abuse' you're an obnoxious basement dwelling reject, with nothing better to do than lose at kids games and troll TH-cam for ego boosts, simply because with a pecker like yours, you can't get laid.
Go find someone that gives a toss about your bucket mouthed trolling comments. I've got three kids more mature than you and they're still in pre-school. GROW UP!
why did this popped up 6 years later to me, this idea is fascinating...imagine pc tower or server rack full of oscilating thingies inside it
Yeah just appeared for me too... weird. I guess a fan is a lot cheaper and probably a lot more efficient than this construction... so makes no sense to use it there at all in a pc tower or server rack, even if you could.
@@Stinktierchen Common fans are less efficient because they produce a lot of EM fields as a waste product. For the current price, fans are a lot cheaper and makes no sense to spend so much in this regard unless required by a specific application
Must have been too expensive to market to consumers 😢
@@warrensteel9954 i saw one guy making piezoelectric LED sign for less than $2...couldn't be more expensive than this fan i suppose
because some of us goofballs who seek out these weird videos have been incrementally training the youtube recommender that we like this stuff. that goes for all of us, who knows who saw it first, but then the fact that that first person watched it indicated to the recommender "wait, wtf? y'all like this shit now? uh, okay" and it tried another person, who also watched it. and after a few of those it was like "yeah alright guess this one is worth trying" and it took off. if you want to cause this to happen, its worth searching for random probably-unpopular shit. you'd be surprised how often something you found in a weird search ends up getting super popular because the recommender just hadn't bothered to show it to anyone until it got its first view in ten years
Announcer: "no moving parts"
Device: "commence the jigglin!"
Cool! Piezo devices are so interesting. The force a simple piezo transducer disk can produce surprised me when doing some experiments with it.
So my aunt was right, crystals are truly magical!!
@@Reth_Hard they say that sufficiently advanced technology is indistinguishable from magic, afterall...
This has some niche applications, and opens the door to very small systems such as self contained aspirating smoke detectors.
Or maybe big server farms where reliability is the main goal and that cost billions of dollars to keep them running?
@@alphastratus6623 Can't come close to providing the volume servers need. The reliability of fans in servers isn't an issue. They have enough overhead that losing a single fan isn't catastrophic. Their BMC system generates an alert, a tech goes out and hotswaps a new fan module in, and at no point does anything go offline or stop working.
This is for applications like comparatively low-power embedded devices controlling/monitoring industrial equipment in dirty/dusty areas, explosive environments, etc. Basically industrial applications. It may be a "niche" market, but it's a pretty large niche, just not one that most people are familiar with.
@@ParadigmUnkn0wn Yea, they found a process that solves the problem and that cost money. Do you really think they would keep this system if something less expensive arrive?
@@alphastratus6623 I'm not sure what point you're trying to make here. These piezo "fans" don't move nearly enough air and aren't nearly as efficient as DC brushless motor fans which are currently used in servers.
Servers already use ball-bearing fans, not the cheaper sleeve bearing fans that are common in consumer PCs. It's not all about cost for them. When you're selling a $20,000+ server you've got some leeway in your bill of materials to go for quality over minimal cost. The enterprise/commercial equipment sector isn't all about cost cutting, reliability is huge to them.
PC and media room applications, if it works.
all you PC gamer wise guys need to realise that there’s other applications for cooling than your gaming rig. factories have to run hundreds of computer systems to control production and many of them are in excessively dusty or damp environments. i can tell you from firsthand experience that a conventional fan won’t last more than a year in such conditions. source: i’m a maintenance engineer in a wool factory.
Ooh, I used to buy for a processor in Australia, nice to see another one!
If it can't cool a gaming PC with a gigantic overclock, there is no reason for it to exist.
Thanks Evie, you are correct that the target application for the piezo fan is not PC's but industrial applications where traditional fan technology is challenged. Our fan can operate reliably in temperatures ranging from -40 to 125C and in dusty, humid and corrosive environments. We are not saying it is the BEST performing fan for airflow, noise etc. But it allows for some forced convection in environments where other fans would quickly fail.
They wouldn't understand that. They live in a fantasy world.
I'm sure Linus Tech Tips will try cooling a PC with 100 of these and a giant radiator.
These are absolutely interesting as all hell, I work in a laser shop thats full of all kinds of nasty stuff that destroys anything that has to do with airflow! I'd love to toss these into that environment and see how they handle...
You mean like CO2 and Fiber Laser cutting machines? If so, I also work on a Fiber Laser and the amount of fine dust particles it produces is unbelievable. Even though the machine has a filter unit it still manages to cover everywhere with that dust over a long period of time.
@@92kosta yep, no matter what it still finds its way out of containment.
If either of you get ahold of one of these pls update us with some test data 🙏
I feel that this also presents a more reliable way of sterile mixing in small scale if design modified a little, as it does not need a break or gasket to spin it can just be coated in sterile flexible material and be mounted to the mixing device
For liquids or suspensions, the many orders of magnitude greater viscosity will be a severe damping problem. For smaller volumes externally coupled magnetic stirring systems are far more reliable and far more energy efficient.
"No moving parts"? Uh... actually, ya got one right there, bud.
Interesting! Would love to know efficiency comparison with conventional fans and cost points.
Here here!!
No rotating or moving parts?
The rapidly moving central "blade": Anyway, I started blasting....
Looks like some good cleansing incense around the heat sink. Computers need good vibes too 😎
No moving parts?? What's that yellow thing..
Apologies for the late reply. You've made a good point - and a correct one. We should have said, "no wearing parts."
The yellow material is actually a glass fiber epoxy composite (FR4) - commonly used for printed circuit boards. In this case, it encloses the piezo ceramic that actuates the FR4 to act as a flapping fan.
Thank you.
@@MideTech and what about material fatigue?
You can bend rapidly a metal strip and eventually it breaks. I don't think that glass fibers in epoxy can not wear and tear on material level.
@@oberguga Good question! The life span is essentially infinite as long as it is run within its parameters. This is flexing, not wearing. It does move, as it vibrates in flexture :)
@@MideTech So no micro fractures?
That’s neat and all, but that is most definitely a moving part.
That's not typically what's considered a moving part, though. Yes, it's in contact with the working fluid but so is a pipe, but we don't consider the plumbing of a house to be a moving part. Nor do we consider a heat sink to be a moving part. The blades of a fan are not a moving part, while the gearbox and brushes are, the bearings are, but the rotor itself is not.
So long as the strain induced on the flappy part only results in elastic deformation the part will last effectively forever. There's nothing for it to wear against.
@@Jesse-qy6ur the pipe is not moving, the water is. The yellow tab is moving, the electrical box is not.
@@RobertWilkinsonJKekMaloy The yellow tab is actually rapidly shrinking and expanding.
This is different to motion in the sense of motive partitions that kinetically actuate.
@@0MVR_0 ahhh. And here i thought it was magnetic field oriented
@@RobertWilkinsonJKekMaloy Your thinking is correct yet omits the method of induction. All electrodynamic and magnetic convection is a realignment of internal orientation. In this case, the yellow tab is its own molecular magnet, having predictable articulation when under stimulus.
It would be great if this principle could be efficient enough to implement with liquid fluids; for example in low power water pumps it wouldn't be necessary to seal the motor shaft and bushing.
Doing it with air seems,, less practical than anything we already got.
But doing it with liquids, now we're talking. Question is, can it move water? or more viscous liquids? It might not be suitable for propulsion, but might find uses for mixing and moving liquids.
@@LegendLength I could see it being used for something ultra light, but it would need to vibrate in 2 dimensions to mimic a wing.
@@lordsqueak Not a terribly complex deal, just couple two units together and offset the input frequency on one.
it's already not necessary to seal the motor shaft. take apart an aquarium pump and take a look. the impeller has a magnet inside and is the shaft, sealed away from the inductors spinning it.
@@lordsqueak If my guess on principles are right, it is nearly impossible and impractical for liquids.
"no moving parts"
moving part: moves
Well it's not Moving from an Engineering Perspective but I get you
@@prathamkalgutkar7538 - Bending is still motion (and a very important part of structural engineering).
...there are no rotating or moving parts...
and literally 3 seconds later it goes bzzzzzz and starts to shake violently
They probably mean there are no bearings that can wear out, which happens often with normal fans.
Bending is not really moving from an engineering standpoint
@@indian.techsupport Motion is motion. I see motion. I see something that will break, from its motion. So from an engineering standpoint, its important.
@@attitudeadjuster793 normal fans fail if they get clogged with dust or are operated for a long time at the wrong angle and at maximum speed.
@@tazanteflight8670 The significance is that in some scenarios lifetime until fatigue-failure can be infinite. The resulting real lifetime may be longer in some situations than failure from a wearing bearing or more likely a seized joint from dust or the like (think normal fans).
Solid state electronics are themselves very constant in failure rate. Might be an interesting read for the specs comparatively.
They used to make wall outlet plug in air freshener with these piezo fans.
I don’t recall them moving near that much air being smaller.
"no moving parts" -- proceeds to vibrate.
damn dude, i would have made my lab buy this years ago but i don't work there anymore lol. definitely keeping this gem in my mental back pocket the next time i need a high reliability fan in this range
"no moving parts"
*donger starts flapping*
Just to say, I'm a big fan.
"no moving parts" immediately moves.
just because its not going in a circle, doesn't mean it isn't moving.
I don't see why this would be better than a high quality computer fan like the industrial series from Noctua.
Finally, known by friends as The Flapping Fan, known by enemies as the Fran
No moving parts
- Element go flapflapflap
cool concept! only thing about the high dust environment, would be having to clean the dust off all those air directional dominos.
Those are heat sinks.
@@sinnison23 air directional dominos sounds cooler
0:11 "No ... moving parts that can wear or fail" . 0:15 A moving part.
"No rotating or moving parts to fail or wear out" immediately followed by demonstrating the one moving part that will be the point of failure on the device. That is peak comedy.
Exactly. Glad I wasn’t the only one seeing that
Given that there isn't any movement across two pieces, its bound to be a lot more reliable. The people said they've done 11 billion cycles without failure.
@@Aaron-ru6ld and how long do those eleven billion cycles last?
Nice demo. Suggestion for you. Could you increase airflow by adding some 'wings' at 90 degrees to the surface of the piezo strip?
yeah, i also thought the fins were not optimal
Hi Duncan! We have tried that and it does not enhance air flow, however, adding external ducting can increase air flow.
So cool that you tried that :)
@@MideTech I feel like this tech can be modified to imitate the movement of butterfly wings, which is more efficient than simple flaps.
@@tapist3482 It could be more efficient, but probably not as durable.
and all you have to accept is a new significant source of vibrations
I'd hazard a guess that EEVBlog would say "look at that piezo element flapping in the breeze" for sure :-)
As electronic engineer myself that EEVBlog is one of the worst people in the industry, I once seen one of his video where he is pushing his cheap Chinese multimeter and does the most ridiculous test on it to kill the competition meter, never in 35yrs have I done anything like he did in that test to any meter.. then he goes out his way to be over the top of topics he has no clue on, he is a bad engineer but manage to capture people following him on youtube by acting that way.
LMFAO I would like to see how Dave enthusiastically describes this piezo fan.
What is the fatigue lifetime on the flapping element and the piezoelectric element itself? Does it require high voltage to drive the piezo element, and if so, is the driver circuitry contained within the element? How would this compare to a voice coil actuator driving a flapping element?
Driver circuitry cannot be placed in the element. The fan needs a 60Hz 115VAC line to operate. But, since the power consumption of these things are typically very low (roughly 30mW) you can backfeed a generated sine wave through a transformer to achieve this on a DC supply.
This particular fan is driven off line voltage in the US. There is some small current limiting circuitry. Here is some info we provided to another comment on the fatigue question:
During the development of the piezoelectric fan our customer required us to run some highly accelerated life testing (HALT) on a statistically significant number of samples. The test included thermally cycling the fans 1000 times from -40 to 125C while they were operating. The test took about 5 weeks to complete. There were no failures. We also ran the fans through high temperature operating life at 180C (HTOL), low temperature operating life at -70C (LTOL), Over voltage test at 100% over the normal operating voltage, Humidity HALT testing, Cold start testing which included a hard start up after the fans soaked at -40C for 14 hours, high temperature storage tests where the fans were soaked at 140C for 1000 hours prior to successful operation, dust ingress testing, salt spray and fog testing and IP68 testing where we submerged the fans for 72 hours at the equivalent of 3 meter depth pressure and then operated them after they were removed and dried off. There were never any failures during any of these tests. Lastly, we have been running a non accelerated life test on a single unit (in my office) since June 15th, 2016. It has only been unplugged one time when we moved to a new building. It is still running as of this morning with no noticeable change in performance. I sit about 6 feet from it, If I really try to listen hard I can hear it running. Running at 60 Hz we have put just over 11 billion cycles on the fan without failure or change in performance.
@@MideTech Holy shit that is an amazing answer, I appreciate that
@@MideTech That is robust.
Can they be operated on variable speed drive?
Can these be made in such a way so that it can be the main part of a diaphragm in an ultra thin speaker to allow better throw than fixed magnet speakers where a magnet blocked the full swing potential?
Forced Convection is an outrage!! Convection should be consensual!
So, it was older version of "frore air-jet" ??
This thing exists since the ‘70s and it was sold by Edmund Scientific as a non rotating cooling fan.
“No moving parts”
Proceeds to start to vibrate significantly
Moving parts refers internal kinetics.
One would fail to say that an arrow in motion has moving parts.
@@0MVR_0 - Bad analogy. A better equivalence would be with a living (flexible) hinge. You might describe it as being all "one part", but when it bends it's still moving, and is therefore subject to wear. As is the arrow, by the way (just of a different type).
@@RFC-3514 The analogy is apt. Imagine an arrow that flies through the air around the globe in perpetuity. The bending is actually different to motion, so long as there is insignificant wind
@@0MVR_0 - "an arrow that flies through the air around the globe in perpetuity" - The stranger the thing you need to imagine, the clearer it should be how bad the analogy was.
@@RFC-3514 The connecting idea is a solid body immersed in a fluid.
@Mide Technology the technology is inspiring, thanks for the video. But the demo is not complete till you demo all what you assert in the video. Thus, same you showed the air flow with smoke, you should add a sound meter and mute your voice for a while in order to hear the fan's sound, and to see the dB while both when you talk, and when you're muted.
I agree. I think it might be that it actually creates a very annoying constant 50 or 60hz hum.
@@hapskie It's not any louder than a normal fan and in some cases even quieter. However, these are only being marketed for industrial settings where normal fans would fail quickly (very dirty/dusty environments) or environments where there is a lot of flammable/explosive gas. The ambient noise would drown out any kind of "humming" these fans might produce. It's not really necessary to test for or worry about.
"no moving parts" *The thing begins to vibrate rapidly*
Interesting idea. Is there any real life demo or comparison to an traditional fan we can watch?
i just saw a modern application of this technology, it is still in testing phase but it was used as an insect drone wings.
""...with no moving parts..."
*3 seconds later*
the fan flaps like crazy
Movement means between parts.
If one attaches more than one piezoelectric oscillator to a single mica card, they will oscillate synchronously vastly increasing the fan's surface area and airflow. Sandwiching mica card oscillators between peltier plates, produces an effective high efficiency low consumption cooling and heating assembly.
Fascinating fan. I might want to play with one of these sometime soon.
Amazing ZERO material fatigue! Please do publish your findings and collect your nobel prize. Oh wait this video is about a large piezo with a flap.
Add 3 flappers with 120 degree phase , so it can mimic bird flapping and smooth air flow
"there is no rotating or MOVING parts that can wear or fail." Well... 0:16 begs to differ about "moving" parts.
But apart from that, yes a piezoelectric fan like this would be fairly insensitive to dust. But there will still be a buildup of dust on the heatsink surface so no major difference in terms of maintenance in dusty environments.
Also the "NO electromagnetic interference output." is a false claim. Piezoelectric devices tends to run at fairly high voltages, and even if feed with a sine wave it can still capacitively couple to other components and be interfering. If the statement were "less electromagnetic interference compared to typical fans." then it would be a different story.
What did you say was the power draw?
Gonna win the Fan Showdown with this
It'd be interesting to hear it up close.
I'd imagine a low humming noise.
Idk why the algorithm sent us here, but this is neat!
Noisy (that's why there no audio of it here), fragile (all that flexing will create material fatigue stresses over time), inefficient (there is more air pushed on each side of the flexing blade than in front of it), dumb idea. BTW @0:09 "There are no...moving parts...that can fail", oh yeah? What's that flapping blade then?
Wow, this is cool. I wonder if you can make a water pump with this or a laser precision scanner to replace galvo scanners. For curiosity, what is the lifespan of this Piezoelectric Fan? How long can this be run for before being malfunctioned?
"there are no moving parts..." and then the video proceeds to show us a moving part... LOL!
I feel like ornithopters are coming soon.
This video is 6+ years old, how have I not seen these being used already ?
Could it be a patent holding the use of these back ?
it probably just sucks compared to other cooling methods.
A version of this was in the electronics trade mags here in the UK back in the early 80s. They didn't take off then either.
Or it doesn’t work
@@RobertWilkinsonJKekMaloy did you not watch the video.. it didn't look CGI to me.
@@procactus9109 never said fuck about cgi. I said “they said no moving parts, oh look a moving part”
There are no moving parts? There's one part moving quite fast. You should rethink your definition of 'no moving parts'.
Does the material used for the blade experience any degradation over time? Is it resilient enough to last for millions or billions of cycles?
where does the buzzing noise come from?
Is it coming from the flapping of the blade back and forth making the swoosh sound?
or is it of electrical nature?
I can see a "moving" part right at centre 🤔
And what material are you going to use to prevent material fatigue? Unobtainium?
cool zoom stick thingy, I can't believe they've made arrays of them on a microchip that send air at 120mph, that's only mk1 of the product, and it's on demo at CES. I wonder about the durability in years? I can see there being a good market for these, it could take some active reach out to potential customers. How is the company growing?
How about vibration?
Let’s get these in a gaming PC. I’m sure LinusTechTips would be interested in looking at this tech.
What is the point of piezoelectric...if you have to plug it in to the mains....really?
Not new. A company here in the UK - I have a memory of it being Plessey or Pye - had a version of this in the early 80s or possibly earlier.
could it power an rc plane or make an ornithopter?
Can I cool off my pc with that?
What is the point of the heatsink ?
This design must produce some kind of audible buzzing, unlike rotating fans.
Is the bending of the material elastic or plastic deformation?
what about the vibrations caused? what are some applications that wont be affected by them?
Stratos, there are some small mechanical vibrations for sure. I don't have a measurement of them but the next time I'm in our office I'll put one of our enDAQ sensors (www.endaq.com) on there to get you some data. We have found that for most applications the small vibrations are allowable (telecommunications, oil and gas, etc) but there are deifinitely some where the vibrations would not be allowed. Thanks for checking the video out.
@@cludlow64 Thanks for the reply.
@@STRATOS13PAO Thanks for thanking the reply.
What a vibration, look at this cosmic price, you won't need it
What does it sound like? Compare video, normal fan piezoelectric fan?
Great! Just what I have been thinking about.
Is this what Frore airjet are based on?
Looks like that the concept is similar.
Although Seshu did mention that they utilize the phenomenon of jet impingement
There’s quite a bit of Bending and movement of the flap. Seems like it will break after long periods of use.
hmm skeptical. you have no sound as I suspect it's quite noisy. also for dirty environments it will collect on the blade the same as a fan.
Not sure why this video got recommended to me, but I am curious on one thing: Is it possible to power the piezo fan with an inverter power supply setup, for example, if a business needs it for a DC powered low voltage application, and have no means to supply direct AC from the wall, but can convert 12 VDC to 120 VAC 60 Hz, would it be possible?
I see movement!
why has this video suddenly been recomended to so many people? who knows but this is cool, i want to know about material fatigue like the rest of the comments, how long can this last?
Thanks Frogz. Here is some comments we provided on material fatigue:
During the development of the piezoelectric fan our customer required us to run some highly accelerated life testing (HALT) on a statistically significant number of samples. The test included thermally cycling the fans 1000 times from -40 to 125C while they were operating. The test took about 5 weeks to complete. There were no failures. We also ran the fans through high temperature operating life at 180C (HTOL), low temperature operating life at -70C (LTOL), Over voltage test at 100% over the normal operating voltage, Humidity HALT testing, Cold start testing which included a hard start up after the fans soaked at -40C for 14 hours, high temperature storage tests where the fans were soaked at 140C for 1000 hours prior to successful operation, dust ingress testing, salt spray and fog testing and IP68 testing where we submerged the fans for 72 hours at the equivalent of 3 meter depth pressure and then operated them after they were removed and dried off. There were never any failures during any of these tests. Lastly, we have been running a non accelerated life test on a single unit (in my office) since June 15th, 2016. It has only been unplugged one time when we moved to a new building. It is still running as of this morning with no noticeable change in performance. I sit about 6 feet from it, If I really try to listen hard I can hear it running. Running at 60 Hz we have put just over 11 billion cycles on the fan without failure or change in performance.
@@MideTech awesome, i wonder what unexplored applications this would be useful in, micro-fluidics, on chip active cooling, who knows the far reaches of a vibrating reed!
edit: what denotes the natural resonance? is it more a function of mass or of current/voltage?
Yeah, no moving parts, even though the strip move back and forth a lot and can break.
A lot of materials have great stress fatigue resistance. Steel for example. Just because something is rapidly oscillating, doesn't mean it's going to fail immediately.
I would have to see some static pressure and airflow tests. Waiving your hand over a heat sink may be all fine and good on the test bench, but put it inside of a low profile computer case or rack mount and show me how this draws cool air in and expels hot air out of the containment. All modern computers and servers use ducting so that each and every fan channels air in/out of the case. Old 486 and Pentium computers used to wiggle air around inside the case, like this does.
These aren't being marketed for consumer use, only for industrial applications where efficiency isn't really a necessity but safety is (like flammable/explosive gas environments). I will tell you that normal fans are way more efficient if you want desktop cooling.
@@Retrolian1000 The Industrial World requires lowest of low profile rack mount cases. Space is money. We still need static pressure tests to show that air moves in and air moves out when it's told to move.
@@agvulpine Depends on the industry but I see your point. Not sure they are going to freely provide that information though.
They did make this for a customer to their specs so I don't think these are a "sham" or anything otherwise they would have gone out of business years ago. There's obviously a market for them.
You should watch their newest video where they address some of the questions and criticisms. It literally came out yesterday.
Pretty fascinatingly simple. Running off of 60hz power to oscillate. How does power draw compare to a traditional fan? (Something like the Noctua 40x20 (12v) drawing 0.05amps/0.6 watts)
According to the specs on the website, the higher power variant uses slightly more power (1 watt vs 0.6), but achieves higher air flow (10 CFM vs 5.5). The low power variant claims to achieve 2 CFM from just 30 milliwatts (0.03 watts).
Why is the mica sheet not considered to be a moving part with its oscillating action?
What if there was a isolated spinning fan blade in the center of that... would it automatically spool u p and amplify the air flow?
I don't understand why the end of the piezoelectric vibrates. As I see electricity is harvested from the other end. Is it so?
And how efficient is this fan compared to alternatives?
This seems like perfect for server applications or even consumer consoles where an elongated form factor could benefit from this. How does static pressure look out of these?
Too expensive for most computer use where product lifetimes are 3-5x less than this thing's MTBF.
Expensive, no more reliable, shorter lifespan, more noise.... want more?
They are a useful for a specific niche market, but that market is not moving a lot of air efficiently.
@@ABaumstumpf They aren't noisier than a normal fan (you can barely hear them if you focus on it) and can last pretty damn long without any kind of maintenance. If you look up in the comment chain above (profdc9's comment), they actually comment on the type of testing (very rigorous) they did and have had one of these running since 2016 with no difference in performance. The only downsides are they don't move as much air as a regular fan does and they require a direct line connection, so it's difficult to implement in low-power settings.
These would be very useful in industrial applications where the environment is very dirty and also involve flammable/explosive gases. These won't replace desktop fans.
So many people in the comments not understanding what "no moving parts" means, lol.
You didn't pay attention in physics class and it shows.
Wow, that was really cool! 👍
We should have more of these for the PC coolers, CPU and GPU and PSU
What is the benefit of this over a cheap regular 3-4 blade fan. The tech behind it is definitely awesome. I cannot believe a fan like this can exist. But it should be justifiable in monetory or energy conservation terms for wide adoption.
These are most useful in industrial environments that are very dirty where a normal fan could fail quickly as well as environments where flammable/explosive gas is common where normal fans could ignite the gas. These won't replace normal desktop fans.
I wonder what this would do in water? Propulsion? Move fluid? Make a mess?
Saludos desde la República Dominicana excelente vídeo
В обратную сторону это работает? Будет ли ветер эффективно направляться так, чтобы раскачать пластину?
What is the airflow ? How many CF per minute ?
Why are you watching a six year old video of a piezoelectric fan? Why, the algorithm of course!
Neat device.