Testing Different Water Pump IMPELLERS Performance and Efficiency - SEE INSIDE THE WATER PUMP

[@Connor-s1k]

It would be interesting to see how much static pressure these impellers can make, could test it by seeing how far they can push water vertically up a pipe before they can't push further

[@riba2233]

Just wanted to write this :)

[@giuseppebonatici7169]

I would venture to say: almost nothing (about 2 meters, equivalent to a 1 dollar pump with a fraction of the power). for 4 reason: 1 there are no seals, so flow would become mostly leaks 2 the flow looks somewhat laminar, which mean low pressure. 3 the gaps in the impellers are insane, there is almost no way to avoid water backflow. 4 centrifugal pumps are for flow, not for pressure, and this pump, comparatively, has about twice the flow of a similarly powered commercial pump. this typically means that it will have at most a 1/4 of the static pressure of a normal pump (if we assume same quality stardards) in theory, and adding god d.. f... seals, you could attach a one way valve and use the flow to power a ram pump and that should give you a max static pressure better than a regular centrifugal pump, with about a 1/10 of the water of the same pump. static pressure is for swivel or diaphragm pumps tho. you shouldn't use centrifugal pumps to pressure systems.

[@cristianocaccia347]

​@@giuseppebonatici7169 Man, I'm working on a centrifugal air compressor for a jet engine and I derived a couple of equations that make sense experimentally, I still have to prove them completely but the derivation is intuitive And the tests data fits the predictions, basically the power P=Q*Dp *k where k is a function of the number of atoms in a molecule of the fluid, for example k for water should be about 2/5,once again I still have to prove it and I have come up with some similar formulas, but to make my point you can actually create static pressure, through the use of a diffuser which decellerates the flow, converting dynamic pressure (1/2 *d *v²) into static pressure

[@cristianocaccia347]

Also Dp is the difference in total (static +dynamic) pressure and Q is the volume flow rate (m³/s)

[@rcman000]

YESS

[@silver_der_perser6948]

0:43 the design is very german

[@IgnisWraith004]

HAHAHAHAHAHAHA

[@NeuriLee]

Too much 😅😅

[@GewelReal]

very easy to use

[@qdriver4035]

Made my day

[@LuxGamer16]

Add 3 more spirals to the last so it can stay in the race. I was really surprised by how good it was, and I was a bit disappointed it was disqualified because of an arbitrary rule.

[@willl84]

You can't though because they'll cross paths

[@lukischwab9235]

I think it performed so well, because the other Impellers overloaded the Motor. This one has less Blades and therefore less torque requirement.

[@LuxGamer16]

@willl84 not that hard to design around that issue

[@lezbriddon]

@@willl84 you can stack spirals without them crossing. its very common in air screws etc for things like aircraft engine superchargers, actually i think you can buy double and triple spiral carpentry screws

[@mrab4222]

@@lezbriddon You'd need to be careful with how densely you pack them because liquids are much more viscous than gases.

[@lordscan1047]

Dont forget that the pumps are not always meant to transport water, and the last impeller looks a lot like the ones using to transport salmon fishes for the salmon farm industry. Great videos, love them.

[@LetsPrintYT]

Thank you for watching ;)

[@Flesh_Wizard]

fish pump

[@KeoLokaiHD]

12:58 "finest german engineering" lool

[@loolkokos]

bro the orange and cyan impelers

[@KeoLokaiHD]

these are word(pixels) on your screen why u lot offended?? just watch the vid and press like for educational content

[@shenpa.8859]

🙋‍♂️

[@Mouhfighter]

man i love your videos, but PLEASE print yourself some seals with TPU :) It really grinds gears that the water it getting everywhere :D Edit: Also, turn the measurement around. Let all of them run for exakt 10 sec (measure by hand or eletronics) and then just measure the wait of the water pumped into a new vessel. This is a lot more precise, especially when using a normal kitchenscale.

[@baorozzo]

Also, having a seal means that if the impellers have any pressure generated inside, that pressure doesn’t go to waste because it can’t be contained inside. Some impellers seem to have more water going outside than others.

[@ctrlaltdebug]

Silicone and grease on the other side should work.

[@Mouhfighter]

@@ctrlaltdebug yes yes, it would work, but this is a 3d printing channel, not a grease and and mechanics channel.

[@badgermetal]

Print o-ring grooves on one side of each sealing surface, deep enough it can hold themselves in permanently, then make custom o rings by cutting to size and super glueing the ends together.

[@BRUXXUS]

Wild! Never seen a water pump use that scroll shape for an impeller. I bet that thing could also deliver some great pressure when optimized.

[@ID_PHOTOGRAPHY]

Exactly there almost exclusively used to compres gas

[@punisher3607]

0:14 orange water pump impeller 1943 german variant

[@justarixell4873]

still waiting for the day to see your pumps not leaking

[@Cevans3535]

I just want to say that I appreciate the inclusion of closed captioning for this video (not sure if you have been doing it for all your previous ones). You have a strong accent which I struggle to comprehend fully in real time, so I was really happy to see that I didn't have to heavily rely on auto-generated closed captioning. Your videos are great, and I know you have put in a LOT of work to make them, so I wouldn't fault you if you didn't take the extra time to include the closed captioning. Just goes to show how great you are at what you do! Thank you!

[@LetsPrintYT]

Thank you! ;)

[@riba2233]

Yes, we want more of these comparisons!

[@BlueJay137]

Hey, the reason why your pumps didn't prime in the beginning is that it's actually the output tube that primes the system. Those pumps are designed to push water, not pull water. So the pushing of the water through a tube creates the suction force to pull the water into the inlet.

[@garymahony701]

Pumps can pull water just fine*, it's air that they can't pump. But yes, creating a siphon on the downstream side of the pump is a pretty common practice. *NPSH shenanigans aside

[@BlueJay137]

@@garymahony701 If you want to talk semantics. Air and water are fluids. Centrifugal-type pumps don't pull in fluid. Its the pressure differential that is created when a fluid is displaced by the moving vanes that causes fluid to enter the pump.

[@garymahony701]

@BlueJay137 while what you said was true, I did specifically refer to water and air by name as while they may both be fluids that doesn't mean they behave identically. Viscosity comes to mind as a pretty significant differentiater between the two. Also the pump creates a pressure gradient which is just a vector field transformation of the molecules as to a lower the energy state of the system. 'Pushing" and "pulling" are not rigorous scientific definitions. And those pumps are designed to "move" water. I'm not sure what you hoped to add. Even being as pedantic as possible, it's not correct to simply say "those pumps push, while those pumps pull" as, by definition, both things are simultaneously happening in concert to create a pressure gradient sufficient to impart momentum into the bulk fluid.

[@BlueJay137]

@@garymahony701 As a teacher I try to use language that the person I am talking to will understand. Hence the terms pushing and pull. Most pumps will only "push" fluids. As an engineer, I try to correct wrong assumptions. Wrong assumptions you have made: 1. "it's air that they can't pump". There are pumps that can pump air. The pump he made can also pump air, not very good though. 2. "the pump...lower the energy state of the system". All pumps add energy into a system. Yes you can turn a pump into a generator which will remove energy from a system but then its called a generator. 3. " 'Pushing" and "pulling" are not rigorous scientific definitions". Most scientific literature regarding gravity and magnetism, the terms push and pull are used. Outside of that, I agree with you its more common to use force and direction. Im sorry if I was pedantic, I think of it as a trade-off between sounding like a boring research paper and adding more flair to grab attention.

[@JusstyteN]

And leaky everything doesnt help creating vacuum to prime it either.

[@Tootall206]

I like how you incorporated your promotion for PCBWay into your video. No harsh subject changes. Nice!

[@ovalwingnut]

I was under pressure to find a video like this I really was pumped when I spotted this one. It wasn't watered down and had GR8T information that flowed smootly from start to finish. Thanks so much.

[@kyronrc]

Great video! now i know why BMW's water pumps are spiral shape 👏🏻

[@JB-xc5ji]

That last one was a scroll pump. It is common in compressors (hvac and vacume pumps) and pumps where there are large but soft particles in the fluid. They are not typically used for water transport (mostly used for gas compression) and are prone to damage from hard particles in the fluid (like sand and rocks). Great video, one suggestion. A great way to increase the validity of test results when it come to pumps is to run the pump for a specific time to get the flow rate as opposed to timing the filling of the bottle (like in previous videos). An electric timer, a valve, and a relay would work wonders. Still a good video and keep up the great work.

[@alice20001]

6:47 "and this is boring as hell" that line killed me

[@ZappyOh]

My intuition tells me, that all the curved impellers should be mirrored ... so the curves opposes the counter-clockwise rotation.

[@georgijsnovikovs]

The point of the impeller is to throw the fluid tangentially to the side. If you make the blade a scoop, it will inhibit the efficiency.

[@ZappyOh]

@@georgijsnovikovs OK ... But it would be easy to test :)

[@SpeedyGwen]

@@georgijsnovikovs the intresting part is what it does to its performances, we know that it may be a bad idea, but we never know about surprises

[@wernerviehhauser94]

​@@georgijsnovikovs erm... no. Impellers can be strait, forward curved or backward curved. Each one has different properties in terms of (1) volume and (2) static pressure, and it's ... "complicated". You can easily fill one semester of mechanical engineering classes with impeller design.

[@angrydragonslayer]

​@@wernerviehhauser94 my professor tried 😂

[@ceilingfanmusic6597]

The last impeller reminders me of the scrolls used in most modern refrigeration compressors. There good at pumping gasses and apparently water to

[@Exandria]

Ahh yes. The reoccurring observation in science that the only thing better than the “swazica” is the Fibonacci sequence. 😂

[@goiterlanternbase]

You tested the best performance on this motor😏 Have the water arch up, to derive the pressure. Less mess🤗 Get a nozzle on the end, to increase the load. Can't wait for a part two, with varying impeller speeds and varying loads.

[@quandiy5164]

The scroll type impeller have been used in sewage pumps and they work well with sludgy fluids.

[@wernerviehhauser94]

and in situations where pressure is more important than volume

[@repairman22]

Great work !!!!

[@rjung_ch]

I really like this approach, and your cat approves it as well 🙂

[@Rebar77_real]

If you stacked more spirals on top of each other that would count as four blades, heh heh.

[@Gearz-365]

Caught me by surprise that the spiral one had the best performance. Shows that sometimes the oddities are the answer

[@JazzbLu]

Super cool! Now play with the spiral length and pitches to see what is best! Totally amazing that the lore water the impeller pumped, the more efficient too! Very very cool!

[@olegmakarikhin]

Thank you, thanks to your video I learned what kind of plastic crap fell out of my dishwasher, and why it was needed there.

[@MrOmwm]

Great video, very interesting and good to see someone interested in creating and experimenting with various impeller designs . I'm a fountain engineer and deal with many types of pumps. Pump design has expanded over the past ten years, mainly using permanent magnet motors with improved electronics and windings for control and torque. The various main factors that effect water flow and pressure are: Open or closed impeller, number of blades, blade depth, blade design as in non fluted (straight up flat as in your video or fluted as in twisted angle), impeller speed (using the same impeller at different RPM) and an important factor is pump motor power, the more torque the more pressure. And then there's the world of multi stage pumps. Many thanks for your videos.

[@SpeedyGwen]

now time to make a competition like the other channels where people 3d model impellers and give u the model and u print and test them against each others~

[@kikilafrite09]

Who wants this to become a new "fan showdown" like series

[@vladimirmyakochin5278]

When coming to centrifugal pumps you need to measure hydrostatic head and pump rate, this are the main parameters. You can also measure shut in pressure on discharge of the pump and recalculate to hydrostatic head. Maximum rate was measured in the video. As the pump does not prime itself you need to make sure that pump is placed below the water tank. Also you may do suction pipe larger diameter than the discharge pipe to minimize suction restrictions. impellers can be different types: closed impeller, semi closed (as shown in the vidoe) and open impellers. For higher hydrostatic head of the pump (higher discharge pressure) you need to use closed impeller. For higher pump rate you need to use open and semi open impellers. Also if you pump dirty abrasive fluids better to use open impellers.

[@henkmagnetic3103]

Enjoy your tests. I will now procrastinate to give due thought to subscribing. Your cat might sway me. Thanks.

[@Oroborus710]

It's always a good day when Let's Print uploads, my favorite 3d printing experimentation channel bar NONE. Keep up the good work mate, I'm looking forward to see what kind of stuff you do next :)

[@DelticEngine]

Very interesting indeed, particularly the spiral impeller which reminds me of a scroll compressor.

[@harrickvharrick3957]

Verrry surprising outcome and watching this video amused me too (not in the last be cause of the commentary given by its maker)! Thank you for being so creative and smart, for thinking intelligently and inspiring other folks, appreciated!

[@Scrogan]

The scale not only measures the weight of the water, but also the force of the water jet. So that will offset your results. For a proper analysis of all the impellers, you’d want a method for continuously measuring flow speed (e.g. the YF-S201) and a variable power supply (or just PWM). You’d ideally automate the entire thing, slowly stepping up the voltage or current and measuring the instantaneous flow-rate after it settles. You could do that with an arduino pretty easily.

[@WJCTechyman]

I''m not surprised the blue "scroll" impeller worked well because a variation of that design is used in some other pump designs except they are usually a concentric spiral hose.

[@jeffk3192]

i worked at an injection molding plant that produced impellors for Pacer transfer pumps. They were all 3-5 impellor "ninja star" designs with compound radiused vanes that did not meet at the shaft similar to your black one. The vanes would have a tighter radius vane that would then soften out to a large almost straight vane

[@TheRa5tra]

different type of vortex makes the impeller have another physically characteristic. another parameters must be adding to the test to know every character of the impeller, but i'm happy to seeing the video, tx a lot ❤❤

[@hazlox]

Who knew the Swaz Tika was the quantum vortex impeller pump. Maybe that’s why it was deleted. Interesting results!

[@grantclark4139]

I'd love to see a video with tests of what pump designs work to self-prime, I feel like that's a problem that comes up a lot in your content and it would be cool to see you tackle it directly!

[@Qwarzz]

Inserts definitely make sense. They can also be harvested out of old prints.

[@anythingrandomlytaped8288]

I got recommend to watch your old impeller video yesterday, I wonder if KZbin did that knowing this was scheduled to come out

[@MCsCreations]

Fantastic work, dude! Nicely done!!! 😃 Once I made a small and slow water pump to try to make a fountain for my cats... But although the motor was outside the water, above it, it kept getting water inside and the water ended full of oil and stuff from the motor. 😕 Anyway, stay safe there with your family! Cats included! 🖖😊

[@ctrlaltdebug]

Try a magnetic coupling so the motor is totally sealed off from water. It's what the commercial ones use.

[@MCsCreations]

@@ctrlaltdebug That's actually a pretty good idea, dude! Thanks! 😃 I'm going to look for those!

[@davidg3944]

Look up "peristaltic pump", that would work very well for your needs. Just be sure to use a tubing rated for potable water and that has minimal chemical leaching risks

[@guest3842]

Спасибо, очень познавательно!

[@JamesJames-r8t]

All the little orange guys cute.😀😀❤❤

[@sidneywright4466]

The orange one looks the best

[@teedjay91]

I think one of the main factor for performance and efficiency is motor RPM. This specific motor has an optimal rpm where it is most efficient, and the design of the impeller mostly changes the load as it relates to the rpm. You should have different performances and efficiency with the same design with different diameters, and every design should have a different optimal diameter, which makes it much more difficult to find the best.

[@KayoMichiels]

The last impeller reminds of one of the many pumps used to compress the gasses in a car air condition unit.

[@miguelsilva3137]

Loved that test!

[@RebeccaLang-v2s]

I would realy like a static pressure test for these impellers.

[@benny_plgraciarz2714]

great compare!

[@emilienamaury3839]

the design that you test in last make me think to a "Vis d'Archimède".

[@goiterlanternbase]

Major Waterware😎👍

[@andromakss_user63]

Спасибо за Обзор конструкции❤

[@20bluebug]

I'm not surprised that the single blade impeller worked so well.....I've seen them used in industrial water pumps designed to pump water mixed with rubble and debris.

[@СеменБердюгин]

The pressure is also interesting criteria you should test. The experiment design is following: you should measure water level in the vertical oriented piping))

[@Mikepet]

The blue spiral thingy. There was a Turbocharger like that that VW used in some cars... called the G-Lader where 2 spirals press against each other to compress air, worked pretty well.

[@Henrix1998]

You should take viewer submissions and do a fan showdown type episodes

[@MrI8igmac]

Dude create a generator with soda and candy. Incredible person

[@Saji_0]

will this be a becoming of impeller showdown

[@pauljs75]

Now which works best?: gland seal, labyrinth seal, or O-ring seal? The pump setup here is still a bit leaky, so what approach should deal with it?

[@Polkem1]

Really entertaining, great quality upload

[@kiqnkf]

Regardless of Performance or Efficiency, my favorite impeller BY FAR, is the Orange one. There's something about it that screams "I'll get important stuff done!!!"

[@davidg3944]

Or, "I'll die in a bunker with my country in ruins"? Inspire a legion of weak men looking for some totem to help them "feel powerful"?

[@Plarux]

I’m curious if you’ve tried adding somewhat of a scoop to the propeller blades. Could help in situations where gravity doesn’t feed the pump water.

[@trevorshiffermiller2412]

First time watching one of your videos. I like what you are doing. There is another channel called Major Hardware that does a fan showdown. If you need to have more ideas for different impellers you might want to look at some of the fans he used in season six for static pressure of air. I think you might get some good ideas from those fan designs. As for the blue single swirl blade design not winning, your reasoning was silly. You tested it. It pumped the water the fastest. It had the best efficiency. That was the whole point of the testing was to find out what was best in those two categories. Who cares how many blades it has.

[@alice20001]

EPIC!

[@Gkuljian]

I like the cat!

[@LetsPrintYT]

Tomaati loves the camera! XD

[@jan-arvidsjoblom4811]

Can you try doing the revers of pumping? Try making a water turbin and messure the output of different impellers/motor design

[@markirwin3624]

Judging by that blue impeller, you should look up the lily impeller. It's related to the blue impeller and closer to what you're wanting, although it only has two blades. It is, however, a three-dimensional golden spiral.

[@LetsPrintYT]

Lily impeller is an interesting concept. I have made one by myself on this channel.

[@derpinbird1180]

Awesome video! Would you do slurry pumps in the future?

[@LetsPrintYT]

This is an interesting concept, I will look into it in the future!

[@Floofie_boi]

That last impeller you made is actually something very similar that is used in refrigeration compressors. Is that a scroll impeller / scroll from a scroll compressor. I'm not surprised that it was the best.

[@pauljs75]

Similar, but not a scroll of the type you mention. A scroll pump is a positive displacement pump, and none of the examples in this video are of that type. A scroll has a secondary mating surface and it uses a kind of orbital motion to move the boundary where the two spirals touch. A proper scroll pump is rather neat however, since they can produce a good bit of pressure while remaining fairly quiet.

[@danburch9989]

Fluid transfer pumps work with low head as in pumping fuel from a fuel storage tank to a farm tractor. Their impeller designs might be different than pumps that have to lift water several feet (as in a water well). Then there's piston/diaphram pumps. Engineers have already gone through the design process for the most efficient pump per the applicaton.

[@ezraredgwell]

Die Orange ist mein Favorit.

[@davidg3944]

As I said to another commenter: ""I'll die in a bunker with my country in ruins"? Inspire a legion of weak men looking for some totem to help them "feel powerful"?" Yeah, that's your favorite...

[@ezraredgwell]

Was meinst du? ich bin Deutscher

[@geradkavanagh8240]

Did you consider impeller weight? For a proper test they should all weigh exactly the same also what's the noise level for each type when running.

[@giovannibortolotti9384]

Hi, What material I have to use for Hig temperature? (I need to resist at 100 celsius)

[@peterkiss1204]

Static pressure would be an interesting metric too.

[@LetsPrintYT]

Indeed!

[@ctrlaltdebug]

Easy to measure too. See how high it can pump.

[@ckacadv]

I think you should also do a height test to see how high in the air you can lift the hose for water to continue running

[@LetsPrintYT]

Yes, this is a good idea!

[@Iowa599]

That blue impller is similar to a G-lader supercharger, like on a VW Corrado G60. Very interesting! I wonder hw well it performs backward...

[@alpharif8640]

Hello, I have a question for you. What is the appropriate impeller for high pressure? I am not talking about the flow rate. Thank you.

[@DieDae]

The last design reminds me of the spiral of scroll compressors.

[@craigr6186]

A closed face impeller is the most often used on pumps in commercial applications

[@SK.The-Machine-Designer]

hello young man i appreciate your effort for finding efficient vane shape. here i need to tell some thing that is rather than measuring displacement to time, it does require to find the pressure also because we must describe the efficiency in terms of, this much volume at this much pressure in given time to this much power!. please try

[@buubised]

cross pattern tightening is a good practice

[@Yousitech]

I like the blue impeller. It reminds me a bit of a Tesla turbine for some reason

[@joeschmo622]

That last one seems like a "scroll compressor". Vaguely recall that some designs of ac compressors use something like that. There's a reason someone came up with that design, and now you know why. 😂💯😂💯😂

[@USSRDragon]

Next test, pressure vs flow, Im willing to bet that last one has high flow but no pressure.

[@kwestionariusz1]

Thank you for performence

[@petermolnar6017]

Hello, i am your regular viewer because of the quality content. However, your todays video title is incorrect and misleading. By measuring time of emptying a vessel, you actually measure flow rate "Q" as opposed to performance or efficiency. A pump's performance or characteristic curve comprises of Q-H Q-P and Q-NPSH curves with Q-H being the most important one. "H" is head, or simply put the pressure created. The efficiency of a pump is the ratio of hydrauilc power (Q*H*const) and pump shaft power (electric power * motor eta). Again in this video you only measured flow rate, performance and efficiency are different.

[@petriepretorius4085]

😂 Electricity from mentos and coca cola, that is out of the box thinking creativity... Sweet sweet idea... Wonder what kWh cost it will be... Great impeller designs and research project, thank you for sharing... 🎉Keep up the creativity!

[@LetsPrintYT]

Coca-Cola and Mentos video was fun for sure! In the end, I did some calculations and it took me arund 2.5 dollars to turn on 5V led lamp for around 4 seconds, its not the best way to produce electricity! XD

[@petriepretorius4085]

@@LetsPrintYT but it for sure is the "sweetest" way to produce electricity... a party trick for sure! thank you for your ingenuity! keep it up! 😄

[@punkys-tz7gw]

You should try the spiral with the Fibonacci sequence

[@SnipCola28]

The spiral is also used in hvac scroll compressor (sort of) its also a pump. Not exactly the same but you get what i mean

[@haydenc2742]

Do 4 corkscrews...might be hard to fit them in the spiral...but you should be able to model them

[@YouTubestopsharingmyrealname]

Your blue impeller is just about the same design as most commercial AC compressors on the market. Called the scroll compressor.

[@andyking05]

I think you should buy another camera, I also think it would be interesting to see the spiral in a reversed design so the spiral goes the other way

[@koldphuzhun]

Nice idea for testing. But the impeller designs are being hobbled by the outlet restriction. Ideally, the water should be able to flow unimpeded from source through outlet with no assistance, meaning there's the same flow area in all parts of the system. The pump and impeller just add pressure in a designed chamber, which causes a pressure increase to the outlet. If your pump had an outlet as big as your inlet and your inlet had a curved funnel shape opening into the chamber, it would really allow the impellers to show their true potential. Then you wouldn't be dealing with decimal level results. It might be a lot more, considering some of your designs are high volume and low pressure while others are high pressure and low volume.

[@gregoryhlavac4731]

That blue impeller is basically one half of a scroll compressor.

[@oengusfearghas9608]

Would be interesting to test the same curved shape but mirrored. IE curved to the left vs curved to the right.

[@98KingQuad]

If the voltage of the battery is dropping, wouldn’t that in turn lower the wattage too?