Pump CALCULATIONS, Flow rate, RPM, Pressure, Power, Diameter
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- Опубликовано: 7 июл 2017
- In this video we learn how to calculate the pump performance curve vales for Volume flow rate, RPM, Head pressure, pump power, impeller diameter for centrifugal pump. This can be applied to pumps within HVAC industry such as chilled water pumps.
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haha Kool , i will Donate you when i will make Few Dollars i am a fresher Now . :-) U did so well for the freshers . you people are really hard workers.
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Thanks Muhammad, really appreciate the positive feedback. We put a huge amount of time into making these videos so it's great to hear we're helping. Best of luck with the interviews and studies.
The Engineering Mindset
Nice explanation going to test those formulas out but in general there is alot of factors but this would be for an ideal impeller pump and should give a decent approximation.
you are Great lecture
thanks for the very good info.
thank you very much
Thanks
Thanks for the great video can you make a video on batch pasteurizer with all design requirement
Hi please make video on normal and standard flow difference.
Thanks in advance
Thanks.
Helpfull video. I just want to ask if these calculations are spesific to centirfigual pumps or all types of pumps (as theory ofcourse)? Thanks for reply.
Nice technical presentation, thank you very much for knowledge sharing.
nice very good
Thank you sir..
As an old school engineer I have found a great deal of interest in your Mindset column. Thank you.
Thank you!!
Thanks sir..... Please upload a video regarding the copper pipe calculation in vrv/vrf pipping..... Thanks again sir.
New VRF unit video here:➡️ ruclips.net/video/4i1XgcP1tmw/видео.html
amazing video thanks a lot
It is AFFINITY LAWS .....nice explaination
Thank you sir
Thanks for this great video ....... could u make video on pump curve and pump selection.. :)
here you go ruclips.net/video/U8iWNaDuUek/видео.html
What is the relation between Head Pressure and RPM? Why do I need to square the RPM in the calculation to determine the Head Pressure from the increase/decrease of the RPM?
i think you got the old and the new RPM values mixed up when finding the New Head Pressure. But I got the concept so thanks
Can we use the new flow rate equation for a gear pump? (2:32)
Thank you for informative video. I have a question! If I have pump with flow rate= 3.5 gallon per minute and nominal pressure = 40 psi. What is the benefit of nominal pressure or what is the relationship between the nominal pressure and flow rate?
Good job
my bore depth is 150 ft. please guide me as per depth pump spec. delivery 2 inch dia.
Ty sir
Hi. Thanks for the informative vids. I have a question! Let say a pump with 60 m3/h, how does a pump pressure effects that volume delivers?
More pressure = more flow. ruclips.net/video/99vikjRrlgo/видео.htmlm3s
If for a 40mtr total head we're using a duty and standby pump what head should be considered for each individual pump? 40mtr head x 2 pumps or 20mtr head x 2 pumps ??
Your channel is so helpful! Thank you for making my summer job easier!
Side note: as an aerospace engineer in training, I would like to tell you that your logo doesn't make sense (3 gears cannot turn when they are configured as you have shown)
Maybe if you were able to observe the gears from a different perspective it does work. The little gear is not connected to to right most gear, only the left. It sits further back.
Glad to hear you found the videos useful, there are plenty more coming!
sir, please upload a video for pipe line sizing based on flow rate and pressure
How do you calculate the flow rate given the spec sheet? Most centrifugal pumps I see don't include this.
Thank you for this great video. I have a question, What are the specifications of a DC solar water pump that can give us 3 cubic meters of water/day? How can I calculate the flow rate of it? Please help me :(
Need to know how long it runs for, do you want e.g. 3m^3 in 1 hour or over 24 hours. Then you need to know the difference in height from pickup to drop off. Then need to know the pipe diameter and roughness and length to calculate the resistance. Then put this all together and you know the size of the pump needed
I hope that 1728000000 rom whatever is just academic and not in any horrible dystopian system of water control...
what is between rpm new and rpm old?
where can I get the source of the mentioned equations in the video ?
BTW, thanks a lot for your videos which I can learn a lot from. :)
Most pump manufacturers will happily provide these formulas if you ask them
The easiest way to remember these formulas is just old_flow/new_flow = rpm_old/rpm_new and just solve for what you want using Algebra.
My nameplate only lists my Motor RPM. Is the RPM and the power that you're referring to in your video that of the motor RPM? Or is it for the Pump RPM? And if those two values are different, how do I calculate pump RPM from motor RPM?
Why don't u make video on plumbing as well sir?
Subpgrm ,to sensors ..signals of wires too, color code reference ranges of time to meet with data saturation...john.
What would this do at 500 foot depth with 130 feet standing well?
if i dont know the whole flow rate of the pump (im making diy dc powered pump) how to find the flow rate?
What is the relation between Head Pressure and Pump Power? I did some arrangements to all your formulas and I got that Head Pressure (new)=Head Pressure (old) x [Pump Power (new)/Power Pump (old)]^2/3 (here, 2/3 is 0.6666667). But from another equation relation between Power (P)=Force (F) x velocity (v) and Pressure (p)= Force (F)/Cross Section (A), which A x v = Q we got that Head Pressure = [(Pump Power (P)/Flow Rate (Q)) x efficiency (n)]. Here, the Head Pressure is directly linear with the Pump Power. Did I miss something?
All no# that you are execute are in the chart?
4 month having 50, 000 more subscriber
hey I have a query -- i've been watching your videos from 3 phase to transformers to invertors to induction motors to pumps... and if the frequency/Hz affects the rpm of the motor thus the rpm of the pump... would a 60hz supply cause 3600 rpm? if a pump has an rpm of 1200 or 1300 like in this, do they have a controller?
A controller affects rpm by changing the frequency of the motor. If the frequency is not altered and is at line frequency (60Hz for USA and 50Hz for Europe), the motor rpm is determined by the number of motor poles. RPM = 120* frequency/No. of poles
Has to be there phase for large municipal wells.
I'm designing and building a small centrifugal pump for a cooling system for my computer. i've searched all over the internet for something to calculate the displacement of an impeller with a certain diameter and number of blades. can you suggest anything?
You can use Simscale to calculate and simulate it. www.simscale.com/
What if i dont have any old system? What to use then?
I want to design pipe line for internal gear pump ,
Kindly suggest formula to calculate pipe line size for 54m3/hr discharge pump
Can the discharge be rotated downward? I can find no picture for this.
Do you know how to calculate suction head if suction point more than two and above.
These formulas are called affinity laws
Calculating output pressure in bar having only the pipe diameter (0,04m), fluid type (water in my case), height (1m) and flow rate (0,42 l/s)?
Tried doing that using Bernoullis principle, but i cannot obtain the pressure to get anywhere. Would anyone mind helping me?
Thank you for the helpfull video. Can you give me the info, how changes the pressure depending from the diameter of the impeller?
Thank you veryí much: georg Balog
Hi Balog, you can use the formula P2/P1=(D2 /D1)^2 where P = pressure, D = diameter 1=old, 2=new. Just rearrange the formaula.
Thank you, my friend. We need pumps for water well drill fluid, mud with a lot of sand, clay a.s.o, and professional pumps are really very expensieve. We would like to give a try to self build pumps. I will send you pictures, wenn it will work.
Sounds like a great project. If it's a mix of mud, sand and water have you considered an Archimedean screw pump. It works very well for these applications as all external with no impeller
Hallo, I don't belive them would work, because we need higher pressure. We are using pumps like this: www.rotek.at/a000/000/000000867_00_RT_A_de.html or for smaller drillings this one: wholesaler.alibaba.com/product-detail/Juanyong-Brand-gasoline-engine-Sewage-pump_60289442112.html
But they can not handle well Mud, normaly we should use pumps like this: www.hydropipe.at/Muyuan-Prospekt_red.pdf wich are to expensive.
Now I want to try build anything what is not a very high quality pump, but cheap with the parts.
This vedio is useful but I have a question when calculating head pressure -increase or decrease RPM why do you square RPM (new) and RPM (old) and the same with head preassure flow rate.
can you cralify on that
THIS CALCULATION IS USE FOR CENTRIFUGAL PUMP ALSO OR THIS CALCULATION ONLY FOR CHILLED PUMP. I HAVE LOT OF QUARRY CAN YOU HELP ME.
Dear, can I Appling this calculation for submersible pump?
I'm trying to figure out the discharge pressure of a pump and kinda frying my brain doing so. lol I have an engine putting out 2.5h.p.@ 3600rpm coupled to a pump that is capable of 161 feet lift and it can pump a maximum of 100 gallons a minute. What discharge pressure is it capable of?
Convert you 161 lift (head) to a pressure measurement. I don't work in imperial, but if a pump is able to produce 20 meters of lift my discharge pressure would be approximately 2 bar.
very goog work. Please , will a continues increase in rpm neseccerily result in increase in
presure.
2. what will be my practical result if rpm is increased to over 7000 and more. please help and respond. Am a farmer
The equations used are theoretical and the results in real world applications will be somewhat different. There are limits to how much pressure the rpm can provide, check the manufacturers design data.
May I ask, is the liquid flow same as (or at least close to) the flow rate at the pump nameplate? Eg. the design nominal head is 30m, and nominal flow rate at 45m3/h, let say in the actual system the head loss is only 20m and the pump is oversized, will the flow rate higher than this design flow rate of 45m3/h or still around this value? We don't change the AC frequency and other stuff.
6:30 isn't flow relative to pressure? i.e decreasing flow increases head pressure and vice versa along the pump performance curve.
I missed that part because it goes against everything I've learned. Are we talking about another pressure? Did you get any response on this matter? Best regards
what if i don't know old head pressure is there other way to find out pumps head pressure?
Sir , i liked much your video and I'm so interested.how I wish you have also calculation about a sprinkler for a common commercial building for a fire fighting system
hello, you used the same ratio and proportion for New Flow Rate and Pump RPM in video @2:33 and @4:27. Of course they will be the same result.
Yes, it was done this way for that exact reason
Hai sir I'm mohamed sir I've doubt about flow measuring..
How to calculate chilled water pump flow rate without flow meter... I've some of date like suction pressure and discharge pressure and speed of pump(rpm) pipes size voltage and amps please sir can you explain it daily I'm face flow measuring issues with consultant plz sir
What's the relationship between rpm and flow rate
see video
ahahahahha :D out of topic
These are simply the infinity laws you are talking about.
Which you should have been identified at the beginning of this discussion.
How to convert motor H min in metre to frequency
How to get a gpm
) 75% sulphuric acid, of density 1650 kg/m3
and viscosity 8.6 mN.s/m2
, is to be
pumped for 0.8 km along a 50mm internal diameter pipe at the rate of 3.0 kg/s, and then
raised vertically 15m by the pump. If the pump is electrically driven and has an efficiency
of 50%, what is the power required? What type of pump would you use and of what
material would you construct the pump and pipe? Take R/ρu2
= 0.004 (e = 0.046mm)
where R is the resistance to flow per unit area of pipe surface.
At 6:46 on the right side it says "gpm" divided by "rpm". Also im a bit confused if that equation is correct because 1) the pressure increases with flow and 2) at zero flow you would have zero pressure.
What is head pressure (new)&head pressure (old)
new is the calculated and old is the original
If we don't know the old data, then how can we calculate the pump head?
i guess that there is something missing here.
As ratios are equal first question is why are they equal..?
and second u should put some original formulas there too like Power/RPM cube is equal to what?
These laws assume that the pump efficiency is constant across all regions of the pump curve; which of course is not true. The accuracy of these calculations will vary from pump model to pump model. Even using the same model but altering the impeller size can cause huge variation.
In practice, I would never use the affinity laws and instead try to interpolate between two points for the best results.
does this video have pdf file?
i have a question.. the flow rate of my pump says " L/min: 5.5/40 ". it's my first time encountering this
I would advise you note the model number and check the manufacturers website for a specification book for that product, it will contain all the information and their interpretations
dear sir when the pump is on 1500rpm so how many litter per minute is pumped
ruclips.net/video/99vikjRrlgo/видео.htmlm47s
What is old amd new rpm
Old is existing
If 1 pump is 3 bar and I run s second water pump also 3 bar what is the pressure is it 3 or 6
You need to clarify the configuration of your system. Are the pumps in series or in parallel?
From explanation sake; let's imagine a pump which operates at 3 bar producing a flow rate of 5 l/s.
If you operate in series; pumping from one pump directly into the suction side of another, the flow rate of this arrangement would be 5 l/s at 6 bar. The discharge pressures are summed, the flow rate remains constant.
If you operate in parallel, two pumps pulling from the same tank and discharging into the same line, the flow rate would be 10 l/s and the pressure 3 bar.
If you're unsure about different pump arrangements look up some diagrams.
hi....why is the impeller diameter old and new?...wouldn't that measurement be fixed...?
How to choose new pump not based on old
See our new video on how to build mechanical versions of electronic circuits? Watch here: ruclips.net/video/Zv9Q7ih48Uc/видео.html
I have question : how to count this?
Rpm pump 1200
Efficiency of Pump is 0.79 %,
Power of pump is 87 kw
the voltage is used 240 voltage or single phase.
Height of pumping is 20 meter, pump works 2 hrs to fill the tank..
1. How many liters of water can pump fill in the tank during two hrs ?
2. How much electricity bill need to pay if charged 50 cent an hr during in 30 days.?
What mean design duty ???
what is it designed for
What mean S1 Duty
Submarsible pump me head 16-66 mtr ka matlab kya hota hai
How to calculate pressure of pump
Sound level is very low. Can you please improve the sound level a bit?
Hii
Imagine an standard 3 phase irrigation pump of 20HP... if I want to use only photovoltaics panels, to dimension the PV plant I need to know how much pannels I require to fulfill the irrigation hours... with a known solar profile per Watt, at each day hours the PV panels through the Inverter will deliver a different electric power, which need to be converted into pumped flow for a defined pressure head...¿how you could convert this electric power at fix voltage into pump flow at fix head? (It will depend in the number of PV panels and irrigation requirement, so it is not trivial at all).... hope you can review it to help the spread of PV pumping with standard equipement (current PV pumps are small and with no spare parts market, so aren't recomended by irrigation designers)
Well it would be better to store the solar energy in a battery bank and then use an inverter to power the pump. The inverter will let the pump run at the required speed and head pressure and it will pull as much power as it needs. The the pump doesn't need to run only when it's sunny
@@EngineeringMindset actually that is part of the economic assessment you have to do to size the project, since batteries are one of the expensive parts of the system, and PV pannels are cheaper nowadays related to the inverter, you consider first to oversize the ammount of panels and lose energy of the daily peak in favor of more hours of energy production during the day (current inverters support near 50% of oversize in DC peak power/ máx AC power).
A few months ago I tried to do the assesment for a small high-flow pump to move water between two ponds, were the farmer use a gas pump and he was wanting to know if PV could be cheaper on a 5 yrs payback analysis... considering irrigation in farms runs on the month with higher availability of sunlight, I started the analysis but I get stack since as electrician I wasn't able to properly model the pump running with a variable power electricity input.. was the first time I saw affinity laws, but they end to be not enough information to made the output power-or-flow graph vs electric power input for a fixed head... give it a second thought, surely it will be a good video.. also related papers I found were highly misterious on how the closed the connection about the input power and output power for the induction electric motor and the variable frequency drive.
It's not so difficult to calculate, you'll need the pump data from manufacturer, some will provide with vfd, if not you find a vfd that will fit and see what the losses will be from the manufacturers chart. At full load the vfd losses will be highest. Once you know maximum values calculate run time and then you'll know how much power and for how long, then you can size your battery bank and then your solar array needed to capture that much, plus a safety factor. There's other things like ram pumps which require no electricity. They could use anaerobic digestor from farm waste. Wind.
Pressure is proportional to 1/(flowrate)^2. Flow rate is proportional to diameter. But Pressure cannot be **inversely** proportional to diameter^2. Where am I wrong?
55 kw Water pump standard section ko to size pipe
Help please
(V1/V2) proportional to (N1/N2)^1
(Hp1/Hp2) proportional to (N1/N2)^2
(P1/P2) proportional to (N1/N2)^3
ery ard roblems as easy as , , !
Sir plz plz tell me why u putt old and new
Because we're replacing an old or existing pump with a new one
@@EngineeringMindset If we are not replacing we are selecting a new then what will be formulas?? And plz tell me how no of turn will reflect at gpm flow in pump
There a guy on RUclips who just sprays water into a bucket for one minute and somehow says he’s able to calculate a pumps performance?
Had no idea Jude Law is also a hydrological enginenerd
⚠️ Learn how *CENTRIFUGAL PUMPS* work here: ruclips.net/video/TxqPAPg4nb4/видео.html ⚠️