Do Pumps Create Pressure or Flow?

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  • čas přidán 24. 06. 2024
  • Explaining how pumps produce both pressure and flow with some fun water demonstrations.
    The bundle deal with Curiosity Stream has ended, but you can still get a great discount on Nebula and support Practical Engineering here: go.nebula.tv/practical-engine...
    There’s a popular and persistent saying that pumps only create flow in a fluid, and resistance to that flow is what creates the pressure in a pipe. This video goes into some details about how two kinds of pumps work: centrifugal pumps and positive displacement pumps.
    Practical Engineering is a CZcams channel about infrastructure and the human-made world around us. Hosted, written, and produced by Grady Hillhouse. We have new videos posted regularly, so please subscribe for updates. If you enjoyed the video, hit that ‘like’ button, give us a comment, or watch another of our videos!
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    This is not engineering advice. Everything here is for informational and entertainment purposes only. Contact an engineer licensed to practice in your area if you need professional advice or services. All non-licensed clips used for fair use commentary, criticism, and educational purposes.
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Komentáře • 2,7K

  • @PracticalEngineeringChannel

    💧 Give me your best pump mantras. I'll meditate on the best one.
    📺 Don't forget to jump on this great Nebula/CuriosityStream deal. curiositystream.com/practicalengineering

    • @coolbionicle
      @coolbionicle Před 3 lety +94

      Pumps are just power supply's for water circuits.

    • @deathhog
      @deathhog Před 3 lety +43

      Pumps propagate proper pressure via fluidic formulation of flow.

    • @joshuartaylor87
      @joshuartaylor87 Před 3 lety +65

      AHHH EHHH PUSH IT... PUSH IT REAL GOOD!

    • @SamSam-pw9nu
      @SamSam-pw9nu Před 3 lety +40

      Pumps create whichever one your system allows

    • @ScottTancock
      @ScottTancock Před 3 lety +43

      "Pumps create pressure, outlets convert pressure difference to flow."
      Most pumps work via a mass pushing against water. At the point of interaction, this is without a doubt pressure. It is only because there is an outlet that the water can move out the way and become flow.

  • @JahLuvzU
    @JahLuvzU Před 3 lety +2991

    A good rule of thumb is: "If you want an accurate one-liner saying, don`t get involved in hydrodynamics".

    • @tomr6955
      @tomr6955 Před 3 lety +91

      A good one liner in itself

    • @Garbaz
      @Garbaz Před 3 lety +28

      or electronics.

    • @asmodeusz28
      @asmodeusz28 Před 3 lety +79

      @@Garbaz I think this one-liner can be generalized over all dynamic systems.

    • @gregs7809
      @gregs7809 Před 3 lety +49

      @@asmodeusz28 All nonlinear* dynamical systems

    • @minihjalte
      @minihjalte Před 3 lety +76

      It can be shortened to: "If you want an accurate one-liner saying, don't get involved."

  • @ThisOldTony
    @ThisOldTony Před 3 lety +2041

    i need that on a tshirt asap!

    • @PracticalEngineeringChannel
      @PracticalEngineeringChannel  Před 3 lety +558

      I've never seen you in a t-shirt!

    • @huwaflo
      @huwaflo Před 3 lety +50

      Maybe you are better of with a pair of golves?

    • @allawa
      @allawa Před 3 lety +20

      Yeah we can't see your shirt so left and right gloves should do the trick

    • @hattielankford4775
      @hattielankford4775 Před 3 lety +8

      @@PracticalEngineeringChannel monogrammed dress shirt?

    • @xandb2641
      @xandb2641 Před 3 lety +3

      Lol advertising

  • @jakebrodskype
    @jakebrodskype Před 3 lety +753

    As a professional engineer who worked at a water and waste-water utility for over 30 years, let me congratulate you for an excellent presentation. I would really like to see a future presentation on cavitation.

    • @matthewhall5571
      @matthewhall5571 Před 3 lety +2

      He did one on turbulence before I think. But obviously that's more general and not pump specific.

    • @Kublai_jesus
      @Kublai_jesus Před 3 lety +7

      He has a couple vids on cavitation too

    • @dominocweber9763
      @dominocweber9763 Před 3 lety +1

      Its an interesting concept its it

    • @Daniel-yy3ty
      @Daniel-yy3ty Před 3 lety +2

      a little late, but it was just beside your comment... it's a sign :D
      czcams.com/video/zCE26J0cYWA/video.html

    • @TheShoemaker208
      @TheShoemaker208 Před rokem

      I worked at a processing plant with very precise dosing needs, I would too love to see a presentation on pump cavitation. We saw a lot of busted welds on the suction side of pumps, being where I am now I'd love to see an "outsiders" view on why/how this could happen.

  • @dragonatorul
    @dragonatorul Před 3 lety +332

    "This isn't rocket science". I'm not a rocket surgeon, but I'm pretty sure pumps and fluid dynamics are a big part of at least designing rocket engines and fuel tanks.

    • @arkie87
      @arkie87 Před 2 lety +40

      i heard a professor once say "come on guys, this isnt rocket science... though it is USED in rocket science"

    • @vast634
      @vast634 Před 2 lety +17

      Designing a good efficient turbo pump is like 30% of the engineering going into a rocket.

    • @forloop7713
      @forloop7713 Před 2 lety +4

      Rocket engines are all about pumps and turbines

    • @cameron3991
      @cameron3991 Před rokem +1

      I work and design pumps, in line pumps, all different kinds of chillers, VRF systems and some of the hardest electronic plc diagnostics you can do. I quit school when I was 15 never finished and now I easily make 6 figures a year.

    • @alejandrosrwebmaster
      @alejandrosrwebmaster Před rokem

      @@forloop7713 Reaction engine leaves the room

  • @idatum99
    @idatum99 Před 3 lety +844

    This video operates where my interest curve and the supply curve intersect.

    • @monad_tcp
      @monad_tcp Před 3 lety +11

      @Jeffrey Long that's only important for youtube itself, no one cares about it

    • @calholli
      @calholli Před 3 lety +2

      I think you mean interest curve and attention curve intersect.

    • @pleasurewasmine3173
      @pleasurewasmine3173 Před 3 lety +2

      @@calholli I think he might be just be saying that he likes this content, it’s both interesting and available or supplied to him. Also, isn’t interest and attention about the same in this context, if something has your attention then it must have your interest or vice versa? Lol just speculating

    • @pleasurewasmine3173
      @pleasurewasmine3173 Před 3 lety

      @Jeffrey Long I think that interest is his demand curve. He is interested in this content ergo he has created a demand for it. Then the supply is this video. Just trying to overthink this, no more than a theory of his message’s meaning haha

    • @rodmackinnon2995
      @rodmackinnon2995 Před 2 lety +1

      Well done.

  • @jonas1340
    @jonas1340 Před 3 lety +1145

    It actually is rocket science too. The big boy rockets all use pumps for propellant flow and thrust control :)) 0:32

    • @quintessenceSL
      @quintessenceSL Před 3 lety +24

      Was going to add how do pumps/fans apply to air? As dad was fond of saying "air is a fluid".

    • @theophrastusbombastus8019
      @theophrastusbombastus8019 Před 3 lety +47

      Yeah and turbopumps are one of the most expensive and complex part of the rocket (admittedly more the turbine than the pump but still...)

    • @aritakalo8011
      @aritakalo8011 Před 3 lety +27

      Yeah. What made V2 (/A-4) possible was it being the first turbo pump powered rocket. Development of rockets was very much development of pumps.
      One of the major descriptors of rockets is their turbo pump cycle and turbo pump burner mixture. open cycle, closed cycle, oxygen rich staged, fuel rich staged, full flow staged and so on. It is all pretty much about "what is powering the turbo pump necessary to feed the combustion chamber with enough combustibles". Actually add pump or pumps? Again another major "rocket pump" thing. Do Single pump or do two independent pumps?

    • @taktuscat4250
      @taktuscat4250 Před 3 lety

      @@quintessenceSL I'm thinking of that too but, isn't that is a compressor?

    • @JK-te2jp
      @JK-te2jp Před 3 lety

      Really?

  • @dralexmclean
    @dralexmclean Před rokem +78

    As a retired mechanical engineer, indeed pump selection for industrial applications is far from a simple task. Great video

    • @josestorino6369
      @josestorino6369 Před 9 měsíci +2

      As an aspiring mechanical engineer, I can say it hasn't gotten easier despite all the computational advances in the industry and education. 😆

  • @shortstack4668
    @shortstack4668 Před 2 lety +44

    Even though this is aimed a lot more at civil engineering concepts, for me who is studying chemical engineering, this channel is so informative to conceptualize and understand physical setups of a bunch of engineering concepts.
    Thank you for the content!

  • @bartz0rt928
    @bartz0rt928 Před 3 lety +618

    "Not a great catchphrase, but it _is_ accurate." Spoken like a true engineer.

    • @altuber99_athlete
      @altuber99_athlete Před 3 lety +3

      That also happens in physics

    • @Serahpin
      @Serahpin Před 3 lety +3

      @@altuber99_athlete This reminds me of the SMBC comic with the evil villain ranting that he's "actually doing something" when the hero calls his work "pure evil."

    • @gasfiltered
      @gasfiltered Před 3 lety +1

      Technically correct...the best kind of correct

    • @altuber99_athlete
      @altuber99_athlete Před 3 lety

      @Qimodis Can you share an example? I'm not saying otherwise, though. I was just saying that physicists (and mathematicians) are also rigorous with definitions.

    • @calholli
      @calholli Před 3 lety +2

      @@gasfiltered Its actually technically incorrect. If you understand ohm's law, think of pressure as the "ohms" of a system; Pumps don't create pressure-- because pressure is actually measuring the "resistance" of flow. The "current" is flow, and the "voltage" would be the capacity rating of your pump. The bigger the pump, the more potential for flow, the more it is resisted, the higher the pressure. Once you look at it that way, its easier to see how pressure is actually on the other side of the equation.

  • @JamesSimmons
    @JamesSimmons Před 3 lety +2089

    I'm an electrician. Everytime I hear it's not the voltage that kills you, it's the current, I slap them in the face and tell them it wasn't the velocity of my hand that hurt them, but the weight of it. Of course the real answer is it's the MOMENTUM of the hand i.e POWER that hurts you.

    • @noalear
      @noalear Před 3 lety +75

      Next time someone says that just zap them with static and ask how they survived being shocked with tens of thousands of volts. I've laid fingers across a 225W piezo driver output before. The Dorito's looking spot on my fingers also smelled like Doritos. ~25kHz ~36V ~6A is wicked and I really didn't expect it.

    • @danieljensen2626
      @danieljensen2626 Před 3 lety +38

      Kind of gets into the weeds of what is a voltage source and what is a current source. Would be interesting to know actually what average voltage across the body is associated with the fatal 2mA of current through the heart though.

    • @earache294
      @earache294 Před 3 lety +57

      it only takes 1/10th of one amp across your heart " right hand to left foot for example " it is the amps that kill you.. you forgot the 3rd item in ohm's law " resistance". making it possible to take 50,000 volts of electricity from a police taser without dieing, in fact that 50k volts can be maintained by a police taser up to 5 seconds.. yet to person lives just fine no permanent damage. in the end it IS the amps that Kill you not the voltage...

    • @v8snail
      @v8snail Před 3 lety +124

      @@earache294
      You couldn't be more wrong. That 50kV is the free-air measurement. Tasers cannot supply more than a very limited current so as soon as the circuit is loaded, i.e. by someones body, the voltage drops to a much lower voltage following ohms law.
      If a taser could sustain 50kV even under skin load there would be around 50A flowing. That just doesn't happen.

    • @JamesSimmons
      @JamesSimmons Před 3 lety +97

      @@earache294 that's a slap in the face for you. The proper answer to the age old question of is it current or potential that kill you is; YES. These are two measures of one thing; the electromagnetic force. Trying to talk about them as mutually exclusive entities is incredibly pointless.

  • @NickShabazz
    @NickShabazz Před 3 lety +33

    This was a really great video, thanks! Loved the graphs!

    • @markmywords5342
      @markmywords5342 Před 2 lety

      ​@gioyu comi Long story short, for the motor it's because of eddy currents.
      For the motor it has to do with the design of the motor. A motor has an ideal operating range. If the motor is spinning too slow, you're not getting bang for your buck (low flow rate). Too fast, and the fields generated by the motor start to interfere with eachother (eddy currents) and its efficiency goes down... so the idea is to get the correct size motor. If you get too big or too small a motor, you strain the motor and make it inefficient. Good electricity goes to waste if you don't select the correct motor... so it's good on your electric bill as well to find the perfect motor.
      In regard to the system curve, I think it's because the pressure drop due to friction in the pipe isn't linear. Watch his other vid on pressure and flow. He's got a part with the hazen williams equation.

  • @t_c5266
    @t_c5266 Před 3 lety +23

    Your new vs old pump mantra is like the "money doesn't buy happiness" one. I revised that phrase to say "money can't directly purchase happiness or friends because they aren't purchasable items, but it can however make your life easier and facilitate many things that do make you happy and will overall improve your happiness versus your position if you didn't have it."

    • @joeespo177
      @joeespo177 Před 3 lety +2

      Money can't buy happiness, but it makes being miserable easier to tolerate.

    • @t_c5266
      @t_c5266 Před 3 lety +4

      @@joeespo177 Like I said. Happiness is not a purchasable quantity. However, theres not a single person on this world who would rather be miserable and poor over miserable and rich.

    • @robertwalsh9904
      @robertwalsh9904 Před 2 lety

      Can we get that on a t shirt?

    • @General12th
      @General12th Před 2 lety +1

      Broadly speaking, I like say "money can't add happiness, but it can subtract unhappiness, and sometimes that's good enough".

  • @HATECELL
    @HATECELL Před 3 lety +222

    This is basically the hydraulic version of the discussion whether an electric source provides current or voltage. And as my university teacher likes to say: "what they have taught you in school might not be wrong, but the full story is a lot more complicated".

    • @crabcrab2024
      @crabcrab2024 Před 3 lety +2

      I would guess it depends on the natures of the source and the load. ;)

    • @solventtrapdotcom6676
      @solventtrapdotcom6676 Před 3 lety +13

      I was about to make the same comment. The correct answer is to ask which exists without a circuit. Voltage/pressure always exists. Flow only occurs when a path to release the pressure is provided. Flow varies depending on resistance. Pumps create pressure. Flow is a byproduct and function of the connected circuit.

    • @timsmith2525
      @timsmith2525 Před 3 lety +4

      It's necessary to create a simple model with which to begin instruction; otherwise, you'd never get to a full understanding. The real world is always more complex then people's simple models of the world.

    • @nc7432
      @nc7432 Před 3 lety

      @@solventtrapdotcom6676 i think this is a really good way to put it

    • @solventtrapdotcom6676
      @solventtrapdotcom6676 Před 3 lety

      @@nc7432 Because it comes from decades of experience. ;-)

  • @thehoovah
    @thehoovah Před 3 lety +325

    Its like the argument, "its not the fall that kills you, its the sudden stop at the end"

    • @pflaffik
      @pflaffik Před 3 lety +23

      Its not the fall, its the wife who pushed you.

    • @whiteerdydude
      @whiteerdydude Před 3 lety +21

      This may be a fun comment, but it isn't the same. The sudden velocity change is exactly kills you and other objects. So your phrase is actually perfectly accurate. The fall itself is irrelevant to the impact, as it isn't what accelerates you are deccelerates you. Rockets in orbit are falling around the body they are orbiting, yet they gained their velocity by firing their engines.

    • @hpekristiansen
      @hpekristiansen Před 3 lety +11

      @@whiteerdydude Like for most words and phrases there are a scientific definition and an everyday definition(by exemplification). "a fall" is normally understood as the event including losing your anchoring point, falling and landing. So yes - that event can most definitely kill you.

    • @whiteerdydude
      @whiteerdydude Před 3 lety +4

      @@hpekristiansen thehoovah seperated the fall and impact in the figure of speech, so that point is not a valid defense of the phrase semantically speaking.

    • @josephburchanowski4636
      @josephburchanowski4636 Před 3 lety +7

      @@whiteerdydude Well it isn't the sudden velocity change that kills you, it is that different parts of your body under go the sudden velocity change at different rates.
      If the rapid change in velocity was applied to all atoms in your body equally at the same time, you wouldn't be hurt by the rapid velocity change.

  • @FowlerAskew
    @FowlerAskew Před rokem +24

    Rewatching this video after measuring I-V curves for lots of small solar panels is really making the similarities between water and electricity stand out. Photovoltaic output is incredibly load-dependant (that's why we use MPPT controllers for all but the most basic solar setups) and the curve describing the output naturally looks a lot like the pressure vs flow rate graphs you showed of the pumps.

  • @Exentity
    @Exentity Před rokem +8

    I’m a certified fluid power hydraulic specialist (CFPHS), and I really liked how you tackled this topic. Definitely showing it to my friends

    • @nolesy34
      @nolesy34 Před rokem

      It really coupled to me

  • @poisonpotato1
    @poisonpotato1 Před 3 lety +223

    When I was in college I understood it as, pumps create pressure which gives fluid energy, difference in pressure causes velocity/flow.

    • @florisr9
      @florisr9 Před 3 lety +19

      Just like a net positive force creates acceleration, not the other way around.

    • @eswing2153
      @eswing2153 Před 3 lety +1

      For gas right? But fluids I thought weren’t compressible.

    • @JPFighter93
      @JPFighter93 Před 3 lety +26

      @@eswing2153 everything is compressible, even fluids and solids. They just need a lot more pressure to compress in comparison to gases. And fluids under pressure also store a bit of energy by expanding their containers.

    • @y.h.w.h.
      @y.h.w.h. Před 3 lety +7

      Yep. Nature seeks equilibrium, and we provide power in one form to create energy gradients to drive a flow that can be used for something else.

    • @praisethyjeebus
      @praisethyjeebus Před 3 lety +2

      @@eswing2153 a fluid is just a substance that flows and takes the shape of its container, gasses and liquids are fluids. In some cases solids are fluids as well.

  • @krisb1999
    @krisb1999 Před 3 lety +131

    I work for a pump company, and I want to show this to all our customers who I swear don't understand pumps. Well done. I look forward to your future pump videos!

    • @emceeboogieboots1608
      @emceeboogieboots1608 Před 3 lety +5

      I work for a company that uses pumps and I can see where you are coming from. As an operator we often see incorrect pumps for applications, often due to plant upgrades or changes.
      Often there are such administrative impediments to making a change that engineers just persist with what is in place
      And budgets...

    • @coolhandluke423
      @coolhandluke423 Před 3 lety +4

      I feel your pain. I'm also a pump technician. My favorite question wothba new pump installation is "will this give me more pressure?" -Well not if your have the same pressure switch or transducer setpoint- happens once a week.

    • @mattgolman
      @mattgolman Před 3 lety +5

      I'm a pump designer and I'm showing this to new engineers as part 1 of onboarding.

    • @midship_nc
      @midship_nc Před 3 lety +4

      i work for a mechanical seal manufacturer, even less understood...feel your pain lol

    • @mattgolman
      @mattgolman Před 3 lety +4

      @@midship_nc From the pump engineer: your work is appreciated.

  • @andrewdaumueller5443
    @andrewdaumueller5443 Před rokem +19

    Excellent video. It would have been nice to have this kind of thing when I was in college for civil engineering. Fluid mechanics was one of the harder classes for me to grasp. I doubt current students recognize how blessed they are to have access to content like this, bridging the gap between the academic concepts and how they manifest is reality. How about this for a catch phrase: "pumps don't create anything, but rather transfer energy into the system, which manifests in the form of flow and/or pressure".

  • @gautammarwaha2903
    @gautammarwaha2903 Před 3 lety +20

    “Internet pump enthusiast” - cracked me up!!

  • @HobbyPackRat
    @HobbyPackRat Před 3 lety +89

    "this is the first of 2 videos... let me know if you want to see more". Grady, i'd watch a video on anything that you passionately explain. You explain complex topics simply with great demonstrations. Any subject is interesting in your videos. Keep up the great work.

    • @wantu2much
      @wantu2much Před 3 lety +6

      Honestly he could narrate paint drying, and talk about how the chemical changes to paint drying, and it would be interesting.

    • @DavidGuild
      @DavidGuild Před 3 lety +5

      Same. I have absolutely no practical use for anything he explains but I still watch all his videos because it's so interesting.

  • @grmasdfII
    @grmasdfII Před 3 lety +25

    "Here in my garage", just bought this new pump, it's really fun accelerating liquid into the discharge line. But you know what I like more than the physics of pumps? Performance.

  • @nicklewis9639
    @nicklewis9639 Před 3 lety +1

    Awesome video! I am a project engineer for a large diameter(54” into 92”) sewer project where we bypass 30MGD. I just went through learning all this and this video does a great job simplifying a complicated topic.

  • @do_hickey
    @do_hickey Před 3 lety +6

    Well done! As someone who does TIC for fire pumps, this was incredibly well put together. You probably know more than I do about the topic, but I have lots of experience with pumps if you want to reach out for any info!

  • @Sinyao
    @Sinyao Před 3 lety +216

    As a chemical engineer that works with pumps on a regular basis, I enjoyed this.

    • @dkgautlhe
      @dkgautlhe Před 3 lety +1

      As a chem eng grad I agree

    • @happymeal5182
      @happymeal5182 Před 3 lety +3

      Stranger on the internet is happy for you

    • @MrAminalCrackers
      @MrAminalCrackers Před 2 lety +6

      As another engineer, I feel the need to tell everyone that I am also an engineer.

    • @honiahakaa
      @honiahakaa Před 2 lety +1

      another engineer here i work in boosting station " compression 5002D turbines

  • @smkymtnsaws163
    @smkymtnsaws163 Před 3 lety +55

    As a HVAC/R tradesman, I meet lots of people who don’t understand this. Engineers and tradesman. I don’t fully understand it yet but that’s why I’m here!

    • @alb12345672
      @alb12345672 Před 3 lety +2

      Heart and blood vessels work the same way. Narrow blood vessels create high blood pressure.

    • @Lucien86
      @Lucien86 Před 3 lety

      People who don't know talking to people who don't know creates great confusion. Also the one who has the loudest voice but knows the least always seems to have the greatest ability to transfer their knowledge and confusion.

  • @erikpetto3672
    @erikpetto3672 Před 3 lety +1

    I just wanted to say I've discovered this channel somewhat recently, and I'm in love with it. Teachers could learn a lot from Mr Engineering's (I'm assuming his name is Grady Engineering) way of explaining core concepts without relying on cumbersome maths.

  • @ronmasters751
    @ronmasters751 Před 3 lety +2

    Had a long, confused discussion over lunch one day with a friend who needed to pump water into a very high reservoir, and was trying to arrange multiple pumps. This clarifies the whole problem.

  • @LQC2556
    @LQC2556 Před 3 lety +61

    Reminds me too much of Electroboom's mantra on voltage vs. current: "It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that indicates how much hurting you shall receive, because a touched supply voltage may drop if its current is somehow limited."

    • @panda4247
      @panda4247 Před 3 lety +3

      @soiung toiue I think that it's something like "it's not the speed that kills you. It's the sudden stop". And also, from the Discworld books "I don't fear heights. I fear the depths below them."

  • @Konenstro
    @Konenstro Před 3 lety +18

    that composite video of the three beakers was great :)

  • @richardwebb9532
    @richardwebb9532 Před 2 lety

    I worked for town councils doing water reticulation and sewerage for 30 years, your presentation is perfect.

  • @KamiInValhalla
    @KamiInValhalla Před 3 lety

    Love this channel. The insightful content, informative experiments, and smooth delivery. Hard to beat.

  • @jimbolimbobimbo369
    @jimbolimbobimbo369 Před 3 lety +20

    In 10 mins you explained how characteristic & system curves interact better than any text book I was ever shown. As a HVAC engineer who deals with centrifugal pumps quite often, I wish I saw this video during uni. Could've saved me a lot of time...

    • @michaelwitt7984
      @michaelwitt7984 Před 3 lety +2

      HVAC engineer here too. Totally sending this to my Jr engineers.

    • @gregholloway2656
      @gregholloway2656 Před 3 lety +1

      Retired HVAC guy here. Thanks for the great explanation, Grady.

  • @jedidiahwest4619
    @jedidiahwest4619 Před 3 lety +27

    Brings me back to my WW plant managing days. In a small town, we all had to think like engineers because the city was too cheap to pay for a real one. Every time I had the chance to talk to an engineer, I would soak it up.

  • @pasabalyemez1
    @pasabalyemez1 Před 2 lety +1

    As a mechanical engineer in a food plant who's currently working on replacing cooling tower 20yrs old circulation pumps (6 pumps, each of 750m3/h, 132kw) with new energy efficient pumps. Really enjoyed the video! Good job!

  • @chatrkat
    @chatrkat Před rokem

    Another excellent and educational video. In addition to your first class production quality, I’ve been enjoying the topics you cover. This particular video was on great interest to me as I’ve been playing with pumps since a small boy when I first watched my dad repair a 1958 pedestal sump pump in our basement.

  • @deathhog
    @deathhog Před 3 lety +159

    "Let me know if - . . ."
    The answer is yes, Brady. The answer will always be, "Yes. We do want to know more. Please, be as in depth as possible."
    Edit:
    Oh! Do come and join the argument over pressure vs flow below. It will help the channel's engagement.

    • @MeriaDuck
      @MeriaDuck Před 3 lety

      Very true

    • @ubersham
      @ubersham Před 3 lety +9

      I thought his name is Grady

    • @superjugy
      @superjugy Před 3 lety

      THIS^

    • @Averna222
      @Averna222 Před 3 lety +1

      @@ubersham It is.

    • @calholli
      @calholli Před 3 lety

      But he's wrong... If you understand ohm's law, think of pressure as the "ohms" of a system; Pumps don't create pressure-- because pressure is actually measuring the "resistance" of flow. The "current" is flow, and the "voltage" would be the capacity rating of your pump. The bigger the pump, the more potential for flow, the more it is resisted, the higher the pressure. Once you look at it that way, its easier to see how pressure is actually on the other side of the equation.

  • @mguy19
    @mguy19 Před 3 lety +76

    "Pumps be like: here have this fluid, unless it's too much trouble..."

  • @miketrissel5494
    @miketrissel5494 Před 3 lety +34

    Boy do I wish we had an engineer like you, 20 years ago. I was an electrician that seemed to have absorbed/dumped into the water system where I worked. (Now retired) They had 4 vertical 1000 gallon / minute Deming pumps that outputted through 8” ID pipe, into a 14” header/collector pipe, sending water from a settling pond, ¼ mile back to the main plant. They kept adding more and more equipment, that needed cooling water, so the engineer kept adding pumps. No matter what he did, the pressure and the volume, ¼ mile away never increased. (Eventually up to 8 pumps) I tried to show him the folly of forcing more water through that same 14” pipe was futile, with an impeller driven pump, but the engineer looked at me as if I was a moron, till he finally got to see the amperage going down on each pump motor as other pumps were manually turned on. (Took 4 clamp-on's at once to visualize it)
    If you would, show how an ammeter is a good tool to check and set up pumps, check wear on impellers, and the need to set the pumps at 100% load (rather than 70-80%), to get the best balance out of multiple pump systems. Some of the newer people to the field would benefit. Most people see pump curves, and just shrug their shoulders. Setting them up is fascinating though, especially when the mechanic foreman comes to you, with his budget for the year, and asks, which pump is showing the least efficiency, and you can show him with an ammeter, and a pressure gauges, which impellers are wearing the most, in parallel multi-pump systems. I’d be glad to feed you my notes, but it sounds like you have all you need.
    Thanks,
    Mike

  • @SilentNightttt
    @SilentNightttt Před 3 lety

    Seriously one of the best channels on CZcams with easy to digest videos that are concise and very well made. Thank you sir.

  • @dj7291993
    @dj7291993 Před 3 lety +424

    “Do pumps create pressure or flow?”
    “Yes.”

    • @okiiPL
      @okiiPL Před 3 lety +4

      they pump XD

    • @mrxmry3264
      @mrxmry3264 Před 3 lety +25

      they create pressure. then the fluid responds to that pressure by flowing.

    • @joshuaklein8429
      @joshuaklein8429 Před 3 lety +17

      @@mrxmry3264 exactly this. Like how a battery creates a voltage differential in a circuit, a pump creates a pressure differential. Fluid in the high pressure side will need to move to the low pressure side but the pump prevents it from going backwards, so it must move through the system first.

    • @mrxmry3264
      @mrxmry3264 Před 3 lety +1

      @@joshuaklein8429 correct.

    • @tomr6955
      @tomr6955 Před 3 lety +3

      By saying yes that is technically a sound answer.
      I enjoy doing it too, eg if someone asks me if I like red or blue, I say yes

  • @advanceringnewholder
    @advanceringnewholder Před 3 lety +148

    0:21 Mehdi: "THANK YOU!!!"

  • @ScamstinCrew
    @ScamstinCrew Před 3 lety +3

    would love to see a video covering impeller pumps. I worked at a valve shop where the serviced crude oil pumps and they used impellers to "pull" the fluid though. the multi stage versions also did a "crossover" so the pumps impellers pushed or pulled on each other instead of generating a huge thrust load to one side. might be an interesting episode.

  • @yoshyoka
    @yoshyoka Před 3 lety +4

    Very nicely done: you have a talent of making complex topics easy to understand.
    There is one complication more: positive displacement pumps which make use of elastic elements (diaphragm, persitaltic etc..) will also provide different flows at different pressures; for some the difference will be tiny, for others quite significant.

  • @nwmancuso
    @nwmancuso Před 3 lety +76

    2:53 “And now through the magic of buying 3 of them!” -TC

  • @neilsucks
    @neilsucks Před 3 lety +53

    "pumps impart flow and pressure to a fluid in accordance with their characteristic curve and the corresponding system curve."
    great mantra. will meditate on that

  • @DoctorMangler
    @DoctorMangler Před 3 lety +15

    As a plumber I really appreciate this video. You opened my eyes to new ideas, and I love pumps too. I work with hydronic pumps so we go for efficiency and longevity rather than high flow or head. There are issues however with placement that can impede or enhance cavitation and also entrapped air removal through traps or high points. Thanks again for all these great videos!

  • @Balar9
    @Balar9 Před 3 lety

    Interesting to see this video pop up today. I just finished my Fluid Dynamics for Fire Protection class this morning. Even though we learned about pumps several weeks ago, it's always interesting to explore some concepts again.

  • @IstasPumaNevada
    @IstasPumaNevada Před 3 lety +7

    "Let me know if you want to see more"
    I'd love to see more!
    Seriously, your channel is one of my favorites.

  • @ydihtty
    @ydihtty Před 3 lety +99

    "Do pumps create pressure or flow?"
    "Yes."

    • @Tjita1
      @Tjita1 Před 3 lety +2

      "Yesn't."

    • @keith_5584
      @keith_5584 Před 3 lety +1

      They also pump moonrock gel, Blue bouncy goo, and superfast orange hydrocarbons. May contain traces of TimeTravel, forward and backward.

  • @jeeprod1
    @jeeprod1 Před 3 lety +1

    Thank you for the informative video. I worked years for a plant in which we did not have a clear understanding of what pumps are capable of. We had to move 10,000 gpm of a slurry containing a crystal formation that centrifugal pumps were hard on. Plus, before we discovered mechanical seals, we were pumping 500 gpm of diluting water into the packing glands, We were burdened with having to repair packing and replacing ballraces on a crippling frequency. At the end of my time at that plant, we had new minds coming on who introduced us to eddy pumps, which changed things . I wish we had youtube and videos like yours to teach us these things back then.

  • @dieseldork6
    @dieseldork6 Před 3 lety +1

    More urban planners need to watch this. Your video describes every day for me while I design wet pipe fire sprinkler systems balancing water flow from the public utilities against what is required to drive the sprinkler system. One other fun fact for pumps is that the less water you have to work with, the less pump you need to add the required flow. Adding a bigger pump to a system with marginal pressure makes for frustrating calculations! Thanks for the video 👍🏻

  • @andrewjvaughan
    @andrewjvaughan Před 3 lety +152

    I must be pumped for this video because there was 0 resistance from me.

    • @moeron9172
      @moeron9172 Před 3 lety +5

      ba dum tsss

    • @gorillaau
      @gorillaau Před 3 lety +1

      No pressure on releasing the second video from me, either.

    • @gus473
      @gus473 Před 3 lety +2

      And the puns start flowing.....!

    • @gorillaau
      @gorillaau Před 3 lety +3

      @@gus473 But the pressure to find another pun increases over time, and the flow decreases accordingly.

    • @erwinli6962
      @erwinli6962 Před 3 lety

      So no head?

  • @OADINC
    @OADINC Před 3 lety +22

    That graph at 3:20 is amazing no longer does anyone need to convert the units I love it!

    • @ARCANEmateCLAN
      @ARCANEmateCLAN Před 3 lety

      If only such a scale was used in industry.

    • @stevenstart8728
      @stevenstart8728 Před 3 lety +1

      Most of us don’t have to convert because we a smart enough to use metric instead of the system that was invented by people who married their own cousins.

  • @lukeprivett9867
    @lukeprivett9867 Před 3 lety +5

    PLEASE MAKE MORE THAN 2 PUMP VIDEOS GRADY

    • @millomweb
      @millomweb Před 3 lety

      'Chemical engineer' - such a vague title.
      What is the difficulty in selecting a pump ?

  • @bensimmons8974
    @bensimmons8974 Před 3 lety

    The simile at the end of the video is so genuine. I LOVE IT!

  • @stefanfl1200
    @stefanfl1200 Před 3 lety +5

    Hi, I work in an refinery and work with pumps, turbines and compressors every day.
    You made a very good video, couldnt explain it better :)

  • @revenevan11
    @revenevan11 Před 3 lety +7

    I thought immediately of the popular (and less than correct) voltage/current saying that you mentioned when I saw the title. Excited to learn more about pumps in this video!

  • @nostrilnick
    @nostrilnick Před 3 lety

    I spent almost 20 years as a mechanical engineer at various pump manufacturing companies designing/developing centrifugal pumps for the water/wastewater and chemical processing industries. This video was a great primer for people getting started in understanding pumps and fluid transfer principals. Well done. Your civil engineering videos almost make me wish I'd studied that instead!

  • @ithasbeenwritten222
    @ithasbeenwritten222 Před 3 lety +55

    I’ve had a lot of friends who are engineers, i myself am a mechanic, and I always smile when i see Grady puts little eyeballs on the action pieces knowing full well how special it is for an engineer to humanize things for the rest of us emotional non-Vulcans. It’s a special breed who can bridge that gap. 🖖🏽
    And amazing how much of a difference they make! 👀

  • @c31979839
    @c31979839 Před 3 lety +5

    More pump videos!
    Any video topic you're passionate about is a video I'll enjoy watching! Your passion and interest comes through so much on these videos.

  • @Patmccalk
    @Patmccalk Před 3 lety +10

    Honestly, who dislikes a video that’s completely educational? Outrageous

    • @SonsOfLorgar
      @SonsOfLorgar Před 3 lety +3

      Usually a person with religious or conservative convictions or both ;)

    • @Patmccalk
      @Patmccalk Před 3 lety +1

      @@SonsOfLorgar “you can’t know that because GAWD”

    • @--_DJ_--
      @--_DJ_-- Před 3 lety +3

      Probably people who don't like his delivery. I didn't really enjoy the video, but I wouldn't go as far as giving it a thumbs down.

    • @revimfadli4666
      @revimfadli4666 Před 3 lety

      @@SonsOfLorgar i like the irony of wild guessing here

    • @simondwilkinson
      @simondwilkinson Před 3 lety +2

      It's educational but not the best quality. He doesn't actually explain that much, just says "pumps are more complicated than you thought" in a long winded way. He shows the characteristic curves, but doesn't attempt to explain why they have the shape that they do. The conclusion is literally just "the flow rate depends on the whole system, not just the pump".

  • @cjjoyce27
    @cjjoyce27 Před 3 lety

    What a wonderful video. I've only recently learned to think about pumps and fans correctly, this was a great way to describe their operation.

  • @akjarni
    @akjarni Před 3 lety

    I would love more videos on pumps, because I adore hearing people talk about topics they're passionate about.

  • @hellohypo2009
    @hellohypo2009 Před 3 lety +5

    Really classy break with the fountain with your melody in the background. So grounding... such soothing... many subscribe.

  • @user-bo2cu1dt8j
    @user-bo2cu1dt8j Před 3 lety +4

    Great video Grady, your content always consolidates what I learn in class but you deliver it with much more enthusiasm which not only makes it more interesting, but helps my understanding of topics so much

  • @Petair23
    @Petair23 Před 3 lety +2

    I love your work. If I was a TV exec, you'd be the next Mike Rowe. Your voice and manner of speech are so welcoming and very pleasing. Not to mention, you're super smart and have a gift for explaining whatev in such an understandable and factual way. Plus, you're covering topics that, for me, just hit home in such a good way. I'm curious about the world I'm living in, and you give a whole lotta answers. Please keep up the fabulous work! Do you have a Patreon or Merch?

  • @Danmemer89
    @Danmemer89 Před rokem

    i love your videos! they're so educational and finding out we live in the same state is a funny little bonus! please keep up the great work!

  • @ryanfitzgerald4408
    @ryanfitzgerald4408 Před 3 lety +3

    I was literally searching your channel yesterday for this video and it didn't exist yet. Thank you sir!

  • @clydecessna737
    @clydecessna737 Před 3 lety +4

    Nice to hear a presenter with good diction and memorable presentation techniques.

  • @buckeyebeliever3397
    @buckeyebeliever3397 Před 3 lety

    More pump videos please! As an EE, I interact with pumps from time to time but need to know MUCH more about them.

  • @olegvelichko1659
    @olegvelichko1659 Před 3 lety

    As always - thanks for the quality infotainment! Love the content!!!

  • @1stGenHomestead
    @1stGenHomestead Před 3 lety +5

    I've been working towards my distribution four water license and my collections 3 license and these videos have really helped me

  • @What_was_wrong_w_jst_our_names

    It’s not the failing of the parachute to open that kills you. It’s the hitting the ground at a high rate of speed.

    • @LeScratch89
      @LeScratch89 Před 3 lety +6

      "If your parachute fails, you have your whole life to figure it out."

    • @diggymgee
      @diggymgee Před 3 lety

      "Guns don't kill people, people kill people!"

    • @justayoutuber1906
      @justayoutuber1906 Před 3 lety

      @@diggymgee loss of blood pressure kills people

  • @stevenmiller2837
    @stevenmiller2837 Před 3 lety

    Enjoyed the video! As a Merchant Marine deck officer, I learned about pumps mostly with an eye towards tanker operations (and ballast operations).

  • @trharrington22
    @trharrington22 Před 3 lety +1

    8:23 the excitement in his face and voice when he gave us the catchphrase

  • @braydenthomas146
    @braydenthomas146 Před 3 lety +6

    Geez Grady... I wish you would've posted this video 2 days ago. I just submitted my capstone project designing a pump system and I could've used this :D

  • @joelmork4118
    @joelmork4118 Před 3 lety +3

    Nice video! I hope your next video about pumps includes something about pump cavitation!

  • @SwissTHX11384EB
    @SwissTHX11384EB Před 3 lety

    Thank you for adding metric to your graphs. It's very helpful :)

  • @tammoratya9504
    @tammoratya9504 Před 2 lety

    looking for a video explaining this and i love how you make it so any questions i have about the topic sound perfectly reasonable and not like im an idiot for not getting it the first time

  • @busterbeagle2167
    @busterbeagle2167 Před 3 lety +43

    Grady, it’s like the old saying
    Build it and they will come.
    Upload it and I’ll watch.
    Edit- and give it a thumbs up. Lol

    • @tomr6955
      @tomr6955 Před 3 lety +2

      And there you've just hit on another hot button issue. Does demand get supply or does supply get demand?

    • @Nosirrbro
      @Nosirrbro Před 3 lety

      @@tomr6955 The whole concept either way is kinda outdated and too simplistic to be genuinely descriptive of reality

    • @busterbeagle2167
      @busterbeagle2167 Před 3 lety

      @@Nosirrbro wrong. What device are you using right now ?

    • @busterbeagle2167
      @busterbeagle2167 Před 3 lety

      @@tomr6955 supply TRIES to meet demand

  • @joshuaalan7580
    @joshuaalan7580 Před 3 lety +13

    "It's not the volts that kills you, it's the amps - the voltage just assists in determining how effectively those amps are in fact killing you"

    • @7784000
      @7784000 Před 3 lety

      No but the voltage determines the Current that is running through your boody as long as the power supply can deliver the current while the current is also determined by your bodys resistance.

    • @heyhoe168
      @heyhoe168 Před 3 lety +6

      It's not the volts that kills you, it's ignorance.

    • @seraphina985
      @seraphina985 Před 3 lety

      @@7784000 But still the fact remains the voltage determines the current that flows. Of course, the voltage can and absolutely will change if connections within the circuit change as this will disrupt the distribution of charges within the circuit. Sure this will be more noticeable if the sink being added or removed is large compared to the sources within the circuit. This is of course why voltage will drop sharply if the charge is being provided by a relatively limited source compared to how much current is able to flow through the new sink as the source simply cannot maintain the charge at that rate of charge dissipation.

    • @jonka1
      @jonka1 Před 3 lety

      Not exactly, the voltage determines how many amps are killing you.

  • @ryanrinn4041
    @ryanrinn4041 Před 3 lety

    I love your videos! I'm going to get curiosity stream again. I had it a few years ago, but ran out of things to watch.

  • @roBLINDhood
    @roBLINDhood Před 3 lety

    This was profound and these physics have been at the center of all three of my different professions. (Electronics, HVAC, automotive)

  • @nebulous962
    @nebulous962 Před 3 lety +15

    I am pumped!

  • @jcprov9481
    @jcprov9481 Před 3 lety +9

    Can we take a moment to pay respects to the sheer amount of time and money spent on these models to demonstrate the concepts in these videos? They are part of the reason I love this channel so much.

  • @gauravrade8908
    @gauravrade8908 Před 3 lety

    Man you just nailed it. YOUR CHANNEL DESERVED THE NAME YOU HAVE GIVEN TO IT

  • @logansteed1204
    @logansteed1204 Před 3 lety

    Would like to see a more in-depth video on positive displacement pumps, mainly Triplex and plunger pump systems. We use them in HDD applications and I would love to learn more about them. Most info on them that I've found is typically related to downhole high pressure systems. Also a video on HDD design, pipe stress during pull back and other general topics related to horizontal crossings!

  • @specific_pseudonym
    @specific_pseudonym Před 3 lety +28

    "Internet pump enthusiast"
    ...yes, there are a lot of those out there XD

    • @timseguine2
      @timseguine2 Před 3 lety

      I think we are the wrong video site for that though

    • @ericv00
      @ericv00 Před 3 lety

      @@timseguine2 You might be surprised.

  • @kamilgorecki9898
    @kamilgorecki9898 Před rokem +4

    Pump as an active element of pipes system provides delivery of the mechanical energy (with respect to time - power) to the fluid which is given as Q•H (for one unit of the specific weight of the fluid). Centrifugal pump was considered in the video thus shape or geometry of the impeller/rotor is strictly associated with its specific speed coefficient (kinematic or dynamic). These types of machines increase kinetic energy of the fluid (also momentum) when non zero net torque is acting on the shaft - see Euler's equation... then most of the kinetic energy is converted into potential energy (geometric elevation & static pressure) as diameter of outlet increases. Total head is a function of discharge H(Q). Briefly speaking, pump is an active source of energy for fluid and pipes as passive elements consume it (dissipation). Thus, actual resistance of pipes (throttling, roughness, length, diameter, elbows...) determine flow rate for a given source of the energy - pump (related to rpm). Thinking in terms of the energy and conservation laws is always usefull

  • @pablo1588
    @pablo1588 Před rokem

    Excellent and accurate presentation of facts involving rotodynamic and positive displacement pumps. Congratulations and cheers!

  • @asterope1604
    @asterope1604 Před 3 lety +1

    I'm an engineer in a pump repair shop and make and fit mechanical seals to them, this video was fantastic.
    Plus to prove pumps do create pressure, it's in their design, the volute has that spiral shape that once the product has been moved off the impeller eye to the walls of the volute it follows this spiral to the discharge and as the volute opens up the fluid builds up and loses flow and builds pressure before leaving the discharge, which is why the suction always larger than the discharge, to create pressure.

  • @SirMaxLevandoskiswagmoney

    Would you ever consider doing a vid on Venturi flow? Always fascinated me

    • @timseguine2
      @timseguine2 Před 3 lety

      He talks about it in his video on cavitation, I think. czcams.com/video/zCE26J0cYWA/video.html

  • @AlecInstant
    @AlecInstant Před 3 lety +7

    Lol, you look so happy during the filming of this. I want to know more about pumps. How big do pumps get?

    • @camilo312312
      @camilo312312 Před 3 lety +2

      According to Guiness the largest water pump is the 4MW Nijhuis HP1-4000.340 Monster

    • @railenthusiast88
      @railenthusiast88 Před 3 lety

      Pump storage power stations must be up there on the larger end.

    • @allencasey6981
      @allencasey6981 Před 3 lety

      How big? Very.

  • @ellisphotographyvideograph8171

    Nice job. Enjoyed the video. The pump creates differential pressure which in turn produces flow just like a difference in voltage potential will produce a current. That’s how I was taught.

  • @sleeper1855
    @sleeper1855 Před rokem

    Excellent visuals - the beakers at different heights does a great job showing the varied pressure

  • @pwtech6767
    @pwtech6767 Před 3 lety +4

    Cool! Do positive displacement pumps next? Or if you REALLY want to have fun trying to figure out what category to put it in, look at a Disc Pump from Discflo. Great way to instigate a class-wide argument in any fluid dynamics or pump-related engineering class.
    Edit: If you want to borrow a couple, I've got a few types of positive displacement pumps that I can drop off in your garage. Also know some folks who have clear cut-away (working!) progressive cavity, rotary lobe and maybe other types of positive displacement pumps if you wanted to do a video on different types.

  • @brown56765
    @brown56765 Před 3 lety +7

    His "I love pumps" has some mad "I live refrigerators" energy XD

    • @millomweb
      @millomweb Před 3 lety

      That's cos they be heat pumps ;)

  • @coleeubanks9537
    @coleeubanks9537 Před 2 lety +1

    I would love to see a video on the pressure/flow differences of centrifugal pumps and positive displacement pumps.