I've saved this video in a playlist and I watch it everytime before my fluid exams. Must say this is an awesome piece of work here.
@SonicGirl4Ever3 жыл бұрын
I'm studying for my Water Resources PE and, having been out of uni for 4 years and never having to touch a pump in my career, this is exactly the refresher I needed. Thanks!
@tacicub3 жыл бұрын
This is excellent! Your instructions are perfect and easy to follow. Thank you!
@PostcardProfessor3 жыл бұрын
Glad it was helpful!
@kkguptahp3 жыл бұрын
Best video solves all points with clarity 👌🏼👌🏼
@thatolehula42963 жыл бұрын
best video om the topic. been studying this for momths amd the dude just gave it all to me in less than 20 minutes ✌😅. great video.
@asifalikalody17224 жыл бұрын
I tried many ways to better understand TDH concept. Finally This video helped me.Thank you very much sir. Subscribed👍
@PostcardProfessor4 жыл бұрын
Thanks for the kind words!
@benklassen774 жыл бұрын
The best video I could find on this topic. Subscribed.
@arinahurgoi30313 жыл бұрын
literally couldnt agree more
@muhammadreza5723 жыл бұрын
It can't be better than this.thanks for your work
@chrisgraham59632 жыл бұрын
Amazing explanation! Thank you!!
@kupo8714 жыл бұрын
Better than my fluids class! Thank you!
@letsgosurfingdude Жыл бұрын
Thanks! Awesome video.
@Anonymous-fj3vi3 ай бұрын
best explanation
@1daniel26784 жыл бұрын
Great video, thanks a lot!
@lex574016 күн бұрын
Bro that what I do when selecting equivalent pump from the existing which isn't in good condition anymore on site
@winexhd93734 жыл бұрын
Thank you!
@karthikp26502 жыл бұрын
Thank you friend
@fredrickagyemang93957 ай бұрын
Master you are too good❤
@fredrickagyemang93957 ай бұрын
15:29 15:29
@thandonxumalo12783 жыл бұрын
Sooo informative! Thank you!
@amirrowhani81012 жыл бұрын
Excellent!
@aliabdulkadhumali2434 жыл бұрын
smart! thank u
@boomfly95432 жыл бұрын
I would recommend to use z for elevation not another h
@zumazumame88527 ай бұрын
Sir... could you explain, why hpump equation sudently become (1+f(L/D))... why vB^2/2g was replaced by 1?
@mirageleung157511 ай бұрын
Does the arch above hb matter when calculating hb? e,g, what if the arch was far higher?
@dheyaalgallaf60602 жыл бұрын
i am slightly confused, if engineering company design a centrifugal pump for viscosity other than water (i.e. other fluid) how to link this pump with a vendor pump tested by water only!
@nhaz652 Жыл бұрын
is it necessary to draw the parobolic line each time?
@26goldnugge3 жыл бұрын
If you have a hose going up a hill as showed in your picture would that produce minor losses?
@santoshkafley57723 жыл бұрын
how did you guess Hp and correspondence value of Q? : Is there mathematics formula?
@Shah8086A3 жыл бұрын
I think Q&H should be determined by the application; then find the pump gives the good efficiency in the region. Not the other way around.
@noopurpancholi44973 жыл бұрын
can we predict VSD or DOL type of pump by this cure?
@brendangolledge83122 жыл бұрын
Is there a theoretical derivation for the shape of a pump curve? I guessed maybe a centrifugal pump imparts constant energy per unit mass to whatever fluid passes through it. Then you'd get E = constant (for any given fluid density) = P + (1/2)dv^2 (d is density), or h = E/(dg) - Q^2/(2gA^2). This has the shape of an upside down parabola (right basic shape), but when I try to compare it to real pump curves, the real curves turn downwards something on the order of 100 times faster than my theoretical model. Do you know why this might be? Am I making some unit conversion error, or is the whole thought process just wrong? If the real pump curves turned down something like 10-50% faster than the theoretical one, I'd be happy, because I guess the pump doesn't conserve energy perfectly and it doesn't have the same efficiency at all operating ranges. But getting a result 10,000% different than the theory is unsatisfying.
@dheyaalgallaf60602 жыл бұрын
Why not taking point B on surface of up tank?
@cts32183 жыл бұрын
1. I can't understand why the head of pump will be larger the head of B after increasing the Q? 2. Besides, why the connection point of the system curve and the pump curve is the operating point? Why don't we adjust the operating point along the pump curve and choose the point nearest to the 0.82????
@abdulrehmankhan48603 жыл бұрын
can we find system curve for closed system ???
@sadhomie89663 жыл бұрын
What is the unit of pump head?
@carlosnoriega72964 жыл бұрын
5:32 souldn't the equation have another term equal to (v^2)/2g which corresponds to the hydraulic losses at the output of the pipe? Having something like Hb=Zb+ hL being hL the primary hadraulic losses.
@PostcardProfessor4 жыл бұрын
That’s the “1” that’s added to f L/D. We can either look at the surface of the water, in which case those are hydraulic losses, or at the exit of the pipe, in which case it’s kinetic energy.
@narrm2 жыл бұрын
Dear sir in some other videos , they consider velosity head as helping the pump so they subtract its value from the total head the pump should give to the fluid
@karimkrimou25684 жыл бұрын
I have two questions 1- why is the velocity in the friction head is the same as the velocity in point b? 2- Is the velocity in point B the same in the impeller? If so, why?
@PostcardProfessor4 жыл бұрын
1 - The friction head is due to the velocity in the pipe. At point B, the assumption is that the diameter of the pipe is the same as everywhere else. Since the diameter is the same, and flow rate has to be the same, we know that velocity is the same. 2 - The velocity immediately before and after the pump is the same as point B. However, inside the pump, things are a lot more complicated, as the impeller is causing a lot of rotational movement while the area is also changing. At this level, we don't try to look too deeply into what's happening inside the pump. That's what the curve is for!
@karimkrimou25684 жыл бұрын
@@PostcardProfessor so I guessed right. Thanks a lot
@craig782 жыл бұрын
I remember putting the energy in to friction. Then I remembered fuck it.