Pump CALCULATIONS, Flow rate, RPM, Pressure, Power, Diameter
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Date: 2023-11-17
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Comments and reviews: 30
StrsDori
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?
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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?
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Pacific
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?
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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?
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Choon
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.
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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.
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Mohamed
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
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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
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benis
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?
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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?
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bert26a
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?
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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?
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Loundre3
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?
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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?
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Chris
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?
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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?
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Abdullah
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?
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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?
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Jose
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?
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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?
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Isaac
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
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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
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Layla
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: (
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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: (
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Danial
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?
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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?
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Gotbread
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.
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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.
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sam111880
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.
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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.
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Ryan
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?
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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?
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Zoldyk
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
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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
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Danly
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?
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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?
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seymour
Pressure is proportional to 1/(flowrate)2. Flow rate is proportional to diameter. But Pressure cannot be inversely proportional to diameter2. Where am I wrong?
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Pressure is proportional to 1/(flowrate)2. Flow rate is proportional to diameter. But Pressure cannot be inversely proportional to diameter2. Where am I wrong?
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Ouzhan
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.
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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.
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Yuneeshwaran
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?
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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?
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Jay
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.
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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.
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mark
(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, ,!
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(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, ,!
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osama
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. :)
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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. :)
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Joe
These are simply the infinity laws you are talking about.
Which you should have been identified at the beginning of this discussion.
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These are simply the infinity laws you are talking about.
Which you should have been identified at the beginning of this discussion.
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Jason
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.
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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.
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Rohith
I want to design pipe line for internal gear pump,
Kindly suggest formula to calculate pipe line size for 54m3/hr discharge pump
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I want to design pipe line for internal gear pump,
Kindly suggest formula to calculate pipe line size for 54m3/hr discharge pump
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hAk
6: 30 isn't flow relative to pressure? i. e decreasing flow increases head pressure and vice versa along the pump performance curve.
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6: 30 isn't flow relative to pressure? i. e decreasing flow increases head pressure and vice versa along the pump performance curve.
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napyung
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
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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
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MOHAMMED
Thanks sir. Please upload a video regarding the copper pipe calculation in vrv/vrf pipping. Thanks again sir.
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Thanks sir. Please upload a video regarding the copper pipe calculation in vrv/vrf pipping. Thanks again sir.
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