SlideShare a Scribd company logo
1 of 34
Download to read offline
Centrifugal Pumps
What To Expect?
Head Power
Efficiency Applications Tidbits
Videos
Positive
Displacement
Centrifugal
Types
Of
Pumps
• Centrifugal Pump Working
• Liquid enters through a suction connection
concentric with the axis of a high speed
rotary element called the impeller, which
carries radial vanes integrally cast in it.
Liquid flows outward, and leaves the
impeller at a considerably greater with
respect to the ground than at the entrance
to the impeller.
• Power is applied to the fluid by the
impeller and is transmitted to the impeller
by the torque of the drive shaft which
usually is driven by a direct connected
motor at constant revolutions commonly at
1750 r/min.
A Centrifugal Pump
Calculation Of Pump Head
Centrifugal Pumps
• Increase of mechanical energy, pressure
by centrifugal force…
• Most commonly used in the industry…
• The impellers are curved backward…
Calculation Of Pump Head
Calculation Of Pump Head
Let’s Start!
Head
Calculation Of Pump Head
1
P
S D
Reservoir
Shut Off Head 50 feet
*In accordance with pump curves
In certain systems (admittedly unusual), the pump
discharge line may have to run at a much higher elevation
than the final discharge point. The fluid must first reach
the higher elevation in the system. If the shut-off head is
smaller than the static head corresponding to the high
point, then flow will not be established in the system.
During start-up and checkout of the pump, a quick way to
determine if the pump has the potential capacity to
deliver the head and flow required, is to measure the
shut-off head. This value can be compared to the shut-off
head predicted by the performance curve of the pump.
Total Head is proportional to the difference in
pressure at the discharge vs. the suction of the
pump.
To obtain a higher head, the rotational speed or
the impeller diameter can be increased.
• So to calculate your head you need the
following...
1. Flow rate in GPM or m^3/hour...
2. Friction losses...
We are going to be using the flowrate of
20 GPM with 50 feet of total NOT VERTICAL
pipe.
[PD-PS/ꝭ]= height(2-1) + Friction Losses(2-1)
Head
• How To Choose A Pump
• Usually we choose a pump on the basis of it’s head which
is basically a generic term given to the total
mechanical energy content of a fluid at a given point in
a piping system. So once we have established the no. of
feet and flow rate that we want we want we can go to the
manufacturer.
1
Pump
2
S D
Reservoir
Tank
Flow Rate 7GPM
.5 inch
15 feet
Calculation Of Pump Head
• The table does not know how many feet of
pipe you have so therefore it lists
pressure loss for a 100 feet of pipe.
100 feet of pipe
48.8 feet of head loss We have 50 feet of pipe =24 feet
Calculation Of Pump Head
Height from point 1 to point 2, in our case it is
15ft…
1. You also need to account for the head you’re
going to be losing because of the friction and
you need to accommodate that, you can
calculate the lost head due to friction by the
use of tables, here you need to know the
nominal diameter of your pipe and flow rate in
gal/min…… Now all you have to do is add them
up…
• Also you ought to add a factor of 15-20 % for
a commercial design to the values of the
table...
(Head) = 15ft + 24ft = 39ft
Characteristic Curves
• The performance of a given pump is
commonly illustrated by plots of
actual head, power consumption, and
efficiency versus volumetric flow
rate. These plots are called
characteristic curves.
• ΔH is head capacity
• P is power of the pump
• Ƞ is the pump efficiency
• NPSHR
Calculation Of Pump Head
1. Technically if the head and the flow rate
operating point for your system is located
above on or below a performance curve then
that pump will be sufficient to do it’s job
(but do remember the economics!)...
2. A fixed speed circulator forces the system to
work on it’s curve, a variable speed
circulator adjusts its curve to meet the needs
of the system.
Product
Name
Pump Curves
This Means that at flow
of 12 GPM in the
product 007-(5) the
pump will create a head
of 6.4 ft. Or at 4 feet
of head the pump will
generate a flowrate of
17 GPM.
12
6.4
17
4
• Pump Head Compensation
• From an industrial point of view pump head is very
important, for every elbow/bend in pipe you have to add
in a certain no. of head usually in feet in order to
accommodate the losses… i.e. 1elbow=2feet then you’d
have to add in 2 feet for every time that elbow appears
in the piping…
• So, you can see here the elbows are causing us 2 feet
loss in head every time they appear so we have to add
that in order to compensate the losses… We also have 3
ft. loss in head due to the vertical piping, we don’t
count in horizontal piping…
• So, Total Head = 9ft. + 12ft. + some excess feet to be
safe...
Pump
Tank
22
2
22
2
3
3
3
• Cavitations And NPSH
• If the suction pressure is only slightly
greater than the vapor pressure some liquid may
flash to vapor inside the pump a process called
as cavitations which greatly reduces the pump
capacity and causes severe erosion. If the
suction pressure is actually less than the
vapor pressure there will be vaporization in
the suction line and no liquid can be drawn
into the pump.
• To avoid the cavitations the pressure at pump
inlet must exceed the vapor pressure by a
certain value called as the net positive
suction head. The required value of NPSH is
about 2 to 3 m (5 to 10 ft) for small
centrifugal pumps but It increases to 15m (50
ft) are recommended for larger pumps.
Calculation Of Pump Head
Tid Bits
Rotary Pumps
Multi Stage Centrifugal Pumps
• High energy centrifugal can generate a head of 200 m only.
• To increase the head (>200 m), multistage centrifugal pumps is used
where multiple impeller is installed on a single shaft.
Imp. Dia.
90
1000
60
800
15
Efficiency (82%)
Pump Priming
• What is it?
• To remove the entrapped air inside the pump is
called pump priming
• When we do it?
1.First start up after a long time
2.First start up after maintenance
3.First start up for a new pump
• How we do it?
• If there is any air entrapped in the suction line, we
need to replace this air with liquid.
• Air can be displaced by pouring liquid from any tank
into the suction line and submerge the pump impeller…
Positive displacement pump can compress the gas to a
required discharge pressure, that’s why they are known to
self priming…
Pump Priming
Priming of a pump is very essential step in start up of
a centrifugal pump.
Fact is that centrifugal pump are not capable of
pumping air or vapors.
Priming is the process in which the impeller of a
centrifugal pump will get fully sub merged in liquid
without any air trap inside. This is especially
required when there is a first start up. But it is
advisable to start the pump only after primping.
Liquid and slurry pumps can lose prime and this will
require the pump to be primed by adding liquid to the
pump and inlet pipes to get the pump started. Loss of
"prime" is usually due to ingestion of air into the
pump. The clearances and displacement ratios in pumps
used for liquids and other more viscous fluids cannot
displace the air due to its lower density.
• Cavitations And NPSH
• If the suction pressure is only slightly
greater than the vapor pressure some liquid may
flash to vapor inside the pump a process called
as cavitations which greatly reduces the pump
capacity and causes severe erosion. If the
suction pressure is actually less than the
vapor pressure there will be vaporization in
the suction line and no liquid can be drawn
into the pump.
• To avoid the cavitations the pressure at pump
inlet must exceed the vapor pressure by a
certain value called as the net positive
suction head. The required value of NPSH is
about 2 to 3 m (5 to 10 ft) for small
centrifugal pumps but It increases to 15m (50
ft) are recommended for larger pumps.
Pump Safety
A note about centrifugal pump is that it doesn’t require a
safety valve while a P.D pump must have a safety valve
because at certain pressure C.F pump will stop producing
any further pressure while the P.D pump will continue to
increase pressure with every stroke until or unless the
Safety valve blows or the discharge is opened…
Turbulence
Turbulence may be generated in other ways than by
flowing fluid in a pipe… in general however it
results from either of these scenarios, one is
the flowing fluid gets In contact with a solid
boundary called as the wall turbulence or two
fluid layers moving with varying velocities
contact called as the free turbulence… Free
turbulence is especially important in mixing…

More Related Content

What's hot

Pump selection and application
Pump selection and applicationPump selection and application
Pump selection and applicationWei Chiao Kuo
 
Basics of Centrifugal Pump
Basics of Centrifugal PumpBasics of Centrifugal Pump
Basics of Centrifugal PumpVikram Sharma
 
pumps and its types-ppt
pumps and its types-pptpumps and its types-ppt
pumps and its types-pptDharmas India
 
Pumps and piping
Pumps and pipingPumps and piping
Pumps and pipingHashim Khan
 
Pump Cavitation & Net Positive Suction Head
Pump Cavitation &  Net Positive Suction HeadPump Cavitation &  Net Positive Suction Head
Pump Cavitation & Net Positive Suction HeadHasnaın Sheıkh
 
PPT On Hydraulic Machines - Turbines
PPT On Hydraulic Machines - TurbinesPPT On Hydraulic Machines - Turbines
PPT On Hydraulic Machines - TurbinesAanand Kumar
 
pumps and centrifugal pump and their classifications
pumps and centrifugal pump and their classificationspumps and centrifugal pump and their classifications
pumps and centrifugal pump and their classificationsTalha Hussain
 
Pumps and types, Npsh, centrifugal pump
Pumps and types, Npsh, centrifugal pumpPumps and types, Npsh, centrifugal pump
Pumps and types, Npsh, centrifugal pumpDhulasi Vinothini
 
All You Need To Know About Cavitation In Centrifugal Pumps
All You Need To Know About Cavitation In Centrifugal PumpsAll You Need To Know About Cavitation In Centrifugal Pumps
All You Need To Know About Cavitation In Centrifugal PumpsRotech Pumps & Systems Inc.
 
Pump training
Pump trainingPump training
Pump trainingDurgham75
 
Basics Fundamentals and working Principle of Centrifugal Pump.
Basics Fundamentals and working Principle of Centrifugal Pump.Basics Fundamentals and working Principle of Centrifugal Pump.
Basics Fundamentals and working Principle of Centrifugal Pump.SHASHI BHUSHAN
 
Understanding npsh and cavitation
Understanding npsh and cavitationUnderstanding npsh and cavitation
Understanding npsh and cavitationAnkit Panwar
 

What's hot (20)

Pumps
PumpsPumps
Pumps
 
Pump
PumpPump
Pump
 
Pump selection and application
Pump selection and applicationPump selection and application
Pump selection and application
 
Basics of Centrifugal Pump
Basics of Centrifugal PumpBasics of Centrifugal Pump
Basics of Centrifugal Pump
 
pumps and its types-ppt
pumps and its types-pptpumps and its types-ppt
pumps and its types-ppt
 
Pumps and piping
Pumps and pipingPumps and piping
Pumps and piping
 
Pump Cavitation & Net Positive Suction Head
Pump Cavitation &  Net Positive Suction HeadPump Cavitation &  Net Positive Suction Head
Pump Cavitation & Net Positive Suction Head
 
Positive Displacement Pumps
Positive Displacement PumpsPositive Displacement Pumps
Positive Displacement Pumps
 
Pumps
PumpsPumps
Pumps
 
Pump and Types Of Pumps
Pump and Types Of PumpsPump and Types Of Pumps
Pump and Types Of Pumps
 
PPT On Hydraulic Machines - Turbines
PPT On Hydraulic Machines - TurbinesPPT On Hydraulic Machines - Turbines
PPT On Hydraulic Machines - Turbines
 
pumps and centrifugal pump and their classifications
pumps and centrifugal pump and their classificationspumps and centrifugal pump and their classifications
pumps and centrifugal pump and their classifications
 
Pumps and types, Npsh, centrifugal pump
Pumps and types, Npsh, centrifugal pumpPumps and types, Npsh, centrifugal pump
Pumps and types, Npsh, centrifugal pump
 
Centrifugal Pumps
Centrifugal PumpsCentrifugal Pumps
Centrifugal Pumps
 
All You Need To Know About Cavitation In Centrifugal Pumps
All You Need To Know About Cavitation In Centrifugal PumpsAll You Need To Know About Cavitation In Centrifugal Pumps
All You Need To Know About Cavitation In Centrifugal Pumps
 
Pump training
Pump trainingPump training
Pump training
 
Centrifugal Pump
Centrifugal PumpCentrifugal Pump
Centrifugal Pump
 
Basics Fundamentals and working Principle of Centrifugal Pump.
Basics Fundamentals and working Principle of Centrifugal Pump.Basics Fundamentals and working Principle of Centrifugal Pump.
Basics Fundamentals and working Principle of Centrifugal Pump.
 
Understanding npsh and cavitation
Understanding npsh and cavitationUnderstanding npsh and cavitation
Understanding npsh and cavitation
 
PUMPS
 PUMPS PUMPS
PUMPS
 

Viewers also liked

Understanding Net Positive Suction Head of Centrifugal Pump
Understanding Net Positive Suction Head of Centrifugal PumpUnderstanding Net Positive Suction Head of Centrifugal Pump
Understanding Net Positive Suction Head of Centrifugal PumpRotech Pumps & Systems Inc.
 
6 Centrifugal Pump Parts & Their Functions
6 Centrifugal Pump Parts & Their Functions6 Centrifugal Pump Parts & Their Functions
6 Centrifugal Pump Parts & Their FunctionsSher Thapa
 
Centrifugalpumpsizingselectionandd lesignpractices 12758726575297-phpapp01
Centrifugalpumpsizingselectionandd lesignpractices 12758726575297-phpapp01Centrifugalpumpsizingselectionandd lesignpractices 12758726575297-phpapp01
Centrifugalpumpsizingselectionandd lesignpractices 12758726575297-phpapp01Jose Acuna
 
Pipe Basics and Formulas
Pipe Basics and  FormulasPipe Basics and  Formulas
Pipe Basics and FormulasRama Chandran
 
Pumps and types of pumps in detail
Pumps and types of pumps in detailPumps and types of pumps in detail
Pumps and types of pumps in detailFARRUKH SHEHZAD
 
NPSH and pump cavitation
NPSH and pump cavitationNPSH and pump cavitation
NPSH and pump cavitationBrian Gongol
 
Centrifugal pumps
Centrifugal pumpsCentrifugal pumps
Centrifugal pumpsSubodh ..
 
Positive Displacement Pumps - Basic Principle
Positive Displacement Pumps - Basic PrinciplePositive Displacement Pumps - Basic Principle
Positive Displacement Pumps - Basic PrincipleSahyog Shishodia
 
Centrifugal pump
Centrifugal pumpCentrifugal pump
Centrifugal pumpTarun Kumar
 
Chilled water piping basics
Chilled water piping basicsChilled water piping basics
Chilled water piping basicsAp Naseem
 
Net positive suction head (Npsh)
Net positive suction head (Npsh)Net positive suction head (Npsh)
Net positive suction head (Npsh)ehsan66
 
SINGLE STAGE CENTRIFUGAL PUMP Assembly and Maintenance Exercise Presentation
SINGLE STAGE CENTRIFUGAL PUMP Assembly and Maintenance Exercise PresentationSINGLE STAGE CENTRIFUGAL PUMP Assembly and Maintenance Exercise Presentation
SINGLE STAGE CENTRIFUGAL PUMP Assembly and Maintenance Exercise PresentationSahdev Kaushik
 

Viewers also liked (17)

Understanding Net Positive Suction Head of Centrifugal Pump
Understanding Net Positive Suction Head of Centrifugal PumpUnderstanding Net Positive Suction Head of Centrifugal Pump
Understanding Net Positive Suction Head of Centrifugal Pump
 
6 Centrifugal Pump Parts & Their Functions
6 Centrifugal Pump Parts & Their Functions6 Centrifugal Pump Parts & Their Functions
6 Centrifugal Pump Parts & Their Functions
 
Centrifugalpumpsizingselectionandd lesignpractices 12758726575297-phpapp01
Centrifugalpumpsizingselectionandd lesignpractices 12758726575297-phpapp01Centrifugalpumpsizingselectionandd lesignpractices 12758726575297-phpapp01
Centrifugalpumpsizingselectionandd lesignpractices 12758726575297-phpapp01
 
Pipe Basics and Formulas
Pipe Basics and  FormulasPipe Basics and  Formulas
Pipe Basics and Formulas
 
Pumps and types of pumps in detail
Pumps and types of pumps in detailPumps and types of pumps in detail
Pumps and types of pumps in detail
 
NPSH and pump cavitation
NPSH and pump cavitationNPSH and pump cavitation
NPSH and pump cavitation
 
Ch e354 pumps
Ch e354 pumpsCh e354 pumps
Ch e354 pumps
 
What is NPSH
What is NPSHWhat is NPSH
What is NPSH
 
Centrifugal pumps
Centrifugal pumpsCentrifugal pumps
Centrifugal pumps
 
Positive Displacement Pumps - Basic Principle
Positive Displacement Pumps - Basic PrinciplePositive Displacement Pumps - Basic Principle
Positive Displacement Pumps - Basic Principle
 
Centrifugal pump
Centrifugal pumpCentrifugal pump
Centrifugal pump
 
Chilled water piping basics
Chilled water piping basicsChilled water piping basics
Chilled water piping basics
 
Pump1.
Pump1.Pump1.
Pump1.
 
Net positive suction head (Npsh)
Net positive suction head (Npsh)Net positive suction head (Npsh)
Net positive suction head (Npsh)
 
pump-net positive head 2.
pump-net positive head 2.pump-net positive head 2.
pump-net positive head 2.
 
SINGLE STAGE CENTRIFUGAL PUMP Assembly and Maintenance Exercise Presentation
SINGLE STAGE CENTRIFUGAL PUMP Assembly and Maintenance Exercise PresentationSINGLE STAGE CENTRIFUGAL PUMP Assembly and Maintenance Exercise Presentation
SINGLE STAGE CENTRIFUGAL PUMP Assembly and Maintenance Exercise Presentation
 
Pumps presentation
Pumps presentationPumps presentation
Pumps presentation
 

Similar to Calculation Of Pump Head

Pump designs by Apurba Ranjan Aich
Pump designs by Apurba Ranjan AichPump designs by Apurba Ranjan Aich
Pump designs by Apurba Ranjan Aichapurbaaich
 
Basic Cenreifuga Pump Fundamental Knowledge
Basic Cenreifuga Pump Fundamental KnowledgeBasic Cenreifuga Pump Fundamental Knowledge
Basic Cenreifuga Pump Fundamental KnowledgeAngga896790
 
Pumps.pptx
Pumps.pptxPumps.pptx
Pumps.pptxcharvani
 
Pumps Part 2 students(1) (3).pptx
Pumps Part 2 students(1) (3).pptxPumps Part 2 students(1) (3).pptx
Pumps Part 2 students(1) (3).pptxKing222688
 
Rceprocating pump
Rceprocating pumpRceprocating pump
Rceprocating pumpFahad jee
 
compressors_pumps course
compressors_pumps course compressors_pumps course
compressors_pumps course Ahmed Emad
 
Pumps and compressor
Pumps and compressorPumps and compressor
Pumps and compressormohameddiaa34
 
Santosh g kelshekar hyd pumping theory
Santosh g kelshekar  hyd pumping theorySantosh g kelshekar  hyd pumping theory
Santosh g kelshekar hyd pumping theoryPraveen Djadhav
 
presentation on hydraulic pump
presentation on  hydraulic pumppresentation on  hydraulic pump
presentation on hydraulic pumpAyush Upadhyay
 
Introduction to Pumps
Introduction to PumpsIntroduction to Pumps
Introduction to Pumpsmohdalaamri
 
Energy conservation related to pumps used in thermal power stations
Energy conservation related to pumps used in thermal power stationsEnergy conservation related to pumps used in thermal power stations
Energy conservation related to pumps used in thermal power stationsManohar Tatwawadi
 

Similar to Calculation Of Pump Head (20)

Pump designs by Apurba Ranjan Aich
Pump designs by Apurba Ranjan AichPump designs by Apurba Ranjan Aich
Pump designs by Apurba Ranjan Aich
 
Pompa.pptx
Pompa.pptxPompa.pptx
Pompa.pptx
 
Basic Cenreifuga Pump Fundamental Knowledge
Basic Cenreifuga Pump Fundamental KnowledgeBasic Cenreifuga Pump Fundamental Knowledge
Basic Cenreifuga Pump Fundamental Knowledge
 
PUMPS.pptx
PUMPS.pptxPUMPS.pptx
PUMPS.pptx
 
Pumps.pptx
Pumps.pptxPumps.pptx
Pumps.pptx
 
Resiprocating pump
Resiprocating pumpResiprocating pump
Resiprocating pump
 
Centrifugalpump
CentrifugalpumpCentrifugalpump
Centrifugalpump
 
Pumps Part 2 students(1) (3).pptx
Pumps Part 2 students(1) (3).pptxPumps Part 2 students(1) (3).pptx
Pumps Part 2 students(1) (3).pptx
 
fluid machines
 fluid machines fluid machines
fluid machines
 
Rceprocating pump
Rceprocating pumpRceprocating pump
Rceprocating pump
 
compressors_pumps course
compressors_pumps course compressors_pumps course
compressors_pumps course
 
Pumps and compressor
Pumps and compressorPumps and compressor
Pumps and compressor
 
FM_Cluster 6.pptx
FM_Cluster 6.pptxFM_Cluster 6.pptx
FM_Cluster 6.pptx
 
Santosh g kelshekar hyd pumping theory
Santosh g kelshekar  hyd pumping theorySantosh g kelshekar  hyd pumping theory
Santosh g kelshekar hyd pumping theory
 
multi stage pump
multi stage pumpmulti stage pump
multi stage pump
 
presentation on hydraulic pump
presentation on  hydraulic pumppresentation on  hydraulic pump
presentation on hydraulic pump
 
Ram Pump - Installation Manual
Ram Pump - Installation ManualRam Pump - Installation Manual
Ram Pump - Installation Manual
 
Introduction to Pumps
Introduction to PumpsIntroduction to Pumps
Introduction to Pumps
 
#3.pptx
#3.pptx#3.pptx
#3.pptx
 
Energy conservation related to pumps used in thermal power stations
Energy conservation related to pumps used in thermal power stationsEnergy conservation related to pumps used in thermal power stations
Energy conservation related to pumps used in thermal power stations
 

More from Hashim Khan

Master's Thesis Submission
Master's Thesis SubmissionMaster's Thesis Submission
Master's Thesis SubmissionHashim Khan
 
Hashim Internship Report 23 12 2016
Hashim Internship Report 23 12 2016Hashim Internship Report 23 12 2016
Hashim Internship Report 23 12 2016Hashim Khan
 
Analysis of Heavy Metals In Waster Water (Poster)
Analysis of Heavy Metals In Waster Water (Poster)Analysis of Heavy Metals In Waster Water (Poster)
Analysis of Heavy Metals In Waster Water (Poster)Hashim Khan
 
Extraction of Heavy Metals From Industrial Waste Water
Extraction of Heavy Metals From Industrial Waste WaterExtraction of Heavy Metals From Industrial Waste Water
Extraction of Heavy Metals From Industrial Waste WaterHashim Khan
 
Polymath For Chemical Engineers
Polymath For Chemical EngineersPolymath For Chemical Engineers
Polymath For Chemical EngineersHashim Khan
 
Chroma pigments and dyestuff
Chroma pigments and dyestuffChroma pigments and dyestuff
Chroma pigments and dyestuffHashim Khan
 
Chemical engineer
Chemical engineerChemical engineer
Chemical engineerHashim Khan
 
Chromatex Chemicals
Chromatex ChemicalsChromatex Chemicals
Chromatex ChemicalsHashim Khan
 
Chromatex Dyes And Pigment
Chromatex Dyes And PigmentChromatex Dyes And Pigment
Chromatex Dyes And PigmentHashim Khan
 
Coal Oxidation And Losses
Coal Oxidation And LossesCoal Oxidation And Losses
Coal Oxidation And LossesHashim Khan
 
Workshop assignment
Workshop assignmentWorkshop assignment
Workshop assignmentHashim Khan
 

More from Hashim Khan (19)

Master's Thesis Submission
Master's Thesis SubmissionMaster's Thesis Submission
Master's Thesis Submission
 
Reactor Design
Reactor DesignReactor Design
Reactor Design
 
RIH ISCMRE'18
RIH ISCMRE'18RIH ISCMRE'18
RIH ISCMRE'18
 
Hashim Internship Report 23 12 2016
Hashim Internship Report 23 12 2016Hashim Internship Report 23 12 2016
Hashim Internship Report 23 12 2016
 
Analysis of Heavy Metals In Waster Water (Poster)
Analysis of Heavy Metals In Waster Water (Poster)Analysis of Heavy Metals In Waster Water (Poster)
Analysis of Heavy Metals In Waster Water (Poster)
 
Studies
StudiesStudies
Studies
 
Ethyl Benzene
Ethyl BenzeneEthyl Benzene
Ethyl Benzene
 
Extraction of Heavy Metals From Industrial Waste Water
Extraction of Heavy Metals From Industrial Waste WaterExtraction of Heavy Metals From Industrial Waste Water
Extraction of Heavy Metals From Industrial Waste Water
 
Matlab
Matlab Matlab
Matlab
 
Polymath For Chemical Engineers
Polymath For Chemical EngineersPolymath For Chemical Engineers
Polymath For Chemical Engineers
 
Chroma pigments and dyestuff
Chroma pigments and dyestuffChroma pigments and dyestuff
Chroma pigments and dyestuff
 
Chemical engineer
Chemical engineerChemical engineer
Chemical engineer
 
Chromatex Chemicals
Chromatex ChemicalsChromatex Chemicals
Chromatex Chemicals
 
Chromatex Dyes And Pigment
Chromatex Dyes And PigmentChromatex Dyes And Pigment
Chromatex Dyes And Pigment
 
Coal Oxidation And Losses
Coal Oxidation And LossesCoal Oxidation And Losses
Coal Oxidation And Losses
 
Nc assignment
Nc assignmentNc assignment
Nc assignment
 
Jaw crusher
Jaw crusherJaw crusher
Jaw crusher
 
3 d printing
3 d printing3 d printing
3 d printing
 
Workshop assignment
Workshop assignmentWorkshop assignment
Workshop assignment
 

Recently uploaded

Design Analysis of Alogorithm 1 ppt 2024.pptx
Design Analysis of Alogorithm 1 ppt 2024.pptxDesign Analysis of Alogorithm 1 ppt 2024.pptx
Design Analysis of Alogorithm 1 ppt 2024.pptxrajesshs31r
 
News web APP using NEWS API for web platform to enhancing user experience
News web APP using NEWS API for web platform to enhancing user experienceNews web APP using NEWS API for web platform to enhancing user experience
News web APP using NEWS API for web platform to enhancing user experienceAkashJha84
 
Graphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesGraphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesDIPIKA83
 
Gender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 ProjectGender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 Projectreemakb03
 
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfRenewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfodunowoeminence2019
 
GENERAL CONDITIONS FOR CONTRACTS OF CIVIL ENGINEERING WORKS
GENERAL CONDITIONS  FOR  CONTRACTS OF CIVIL ENGINEERING WORKS GENERAL CONDITIONS  FOR  CONTRACTS OF CIVIL ENGINEERING WORKS
GENERAL CONDITIONS FOR CONTRACTS OF CIVIL ENGINEERING WORKS Bahzad5
 
Transforming Process Safety Management: Challenges, Benefits, and Transition ...
Transforming Process Safety Management: Challenges, Benefits, and Transition ...Transforming Process Safety Management: Challenges, Benefits, and Transition ...
Transforming Process Safety Management: Challenges, Benefits, and Transition ...soginsider
 
How to Write a Good Scientific Paper.pdf
How to Write a Good Scientific Paper.pdfHow to Write a Good Scientific Paper.pdf
How to Write a Good Scientific Paper.pdfRedhwan Qasem Shaddad
 
specification estimation and valuation of a building
specification estimation and valuation of a buildingspecification estimation and valuation of a building
specification estimation and valuation of a buildingswethasekhar5
 
Technical Management of cement industry.pdf
Technical Management of cement industry.pdfTechnical Management of cement industry.pdf
Technical Management of cement industry.pdfMadan Karki
 
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....santhyamuthu1
 
cme397 surface engineering unit 5 part A questions and answers
cme397 surface engineering unit 5 part A questions and answerscme397 surface engineering unit 5 part A questions and answers
cme397 surface engineering unit 5 part A questions and answerskarthi keyan
 
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratoryدليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide LaboratoryBahzad5
 
ChatGPT-and-Generative-AI-Landscape Working of generative ai search
ChatGPT-and-Generative-AI-Landscape Working of generative ai searchChatGPT-and-Generative-AI-Landscape Working of generative ai search
ChatGPT-and-Generative-AI-Landscape Working of generative ai searchrohitcse52
 
CSR Managerial Round Questions and answers.pptx
CSR Managerial Round Questions and answers.pptxCSR Managerial Round Questions and answers.pptx
CSR Managerial Round Questions and answers.pptxssusera0771e
 

Recently uploaded (20)

Design Analysis of Alogorithm 1 ppt 2024.pptx
Design Analysis of Alogorithm 1 ppt 2024.pptxDesign Analysis of Alogorithm 1 ppt 2024.pptx
Design Analysis of Alogorithm 1 ppt 2024.pptx
 
Lecture 2 .pdf
Lecture 2                           .pdfLecture 2                           .pdf
Lecture 2 .pdf
 
News web APP using NEWS API for web platform to enhancing user experience
News web APP using NEWS API for web platform to enhancing user experienceNews web APP using NEWS API for web platform to enhancing user experience
News web APP using NEWS API for web platform to enhancing user experience
 
Lecture 2 .pptx
Lecture 2                            .pptxLecture 2                            .pptx
Lecture 2 .pptx
 
Graphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesGraphics Primitives and CG Display Devices
Graphics Primitives and CG Display Devices
 
Présentation IIRB 2024 Chloe Dufrane.pdf
Présentation IIRB 2024 Chloe Dufrane.pdfPrésentation IIRB 2024 Chloe Dufrane.pdf
Présentation IIRB 2024 Chloe Dufrane.pdf
 
Gender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 ProjectGender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 Project
 
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfRenewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
 
Litature Review: Research Paper work for Engineering
Litature Review: Research Paper work for EngineeringLitature Review: Research Paper work for Engineering
Litature Review: Research Paper work for Engineering
 
GENERAL CONDITIONS FOR CONTRACTS OF CIVIL ENGINEERING WORKS
GENERAL CONDITIONS  FOR  CONTRACTS OF CIVIL ENGINEERING WORKS GENERAL CONDITIONS  FOR  CONTRACTS OF CIVIL ENGINEERING WORKS
GENERAL CONDITIONS FOR CONTRACTS OF CIVIL ENGINEERING WORKS
 
Transforming Process Safety Management: Challenges, Benefits, and Transition ...
Transforming Process Safety Management: Challenges, Benefits, and Transition ...Transforming Process Safety Management: Challenges, Benefits, and Transition ...
Transforming Process Safety Management: Challenges, Benefits, and Transition ...
 
How to Write a Good Scientific Paper.pdf
How to Write a Good Scientific Paper.pdfHow to Write a Good Scientific Paper.pdf
How to Write a Good Scientific Paper.pdf
 
specification estimation and valuation of a building
specification estimation and valuation of a buildingspecification estimation and valuation of a building
specification estimation and valuation of a building
 
Technical Management of cement industry.pdf
Technical Management of cement industry.pdfTechnical Management of cement industry.pdf
Technical Management of cement industry.pdf
 
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
SATELITE COMMUNICATION UNIT 1 CEC352 REGULATION 2021 PPT BASICS OF SATELITE ....
 
cme397 surface engineering unit 5 part A questions and answers
cme397 surface engineering unit 5 part A questions and answerscme397 surface engineering unit 5 part A questions and answers
cme397 surface engineering unit 5 part A questions and answers
 
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratoryدليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
 
ChatGPT-and-Generative-AI-Landscape Working of generative ai search
ChatGPT-and-Generative-AI-Landscape Working of generative ai searchChatGPT-and-Generative-AI-Landscape Working of generative ai search
ChatGPT-and-Generative-AI-Landscape Working of generative ai search
 
Lecture 4 .pdf
Lecture 4                              .pdfLecture 4                              .pdf
Lecture 4 .pdf
 
CSR Managerial Round Questions and answers.pptx
CSR Managerial Round Questions and answers.pptxCSR Managerial Round Questions and answers.pptx
CSR Managerial Round Questions and answers.pptx
 

Calculation Of Pump Head

  • 2. What To Expect? Head Power Efficiency Applications Tidbits Videos
  • 4. • Centrifugal Pump Working • Liquid enters through a suction connection concentric with the axis of a high speed rotary element called the impeller, which carries radial vanes integrally cast in it. Liquid flows outward, and leaves the impeller at a considerably greater with respect to the ground than at the entrance to the impeller. • Power is applied to the fluid by the impeller and is transmitted to the impeller by the torque of the drive shaft which usually is driven by a direct connected motor at constant revolutions commonly at 1750 r/min.
  • 7. Centrifugal Pumps • Increase of mechanical energy, pressure by centrifugal force… • Most commonly used in the industry… • The impellers are curved backward…
  • 12. 1 P S D Reservoir Shut Off Head 50 feet *In accordance with pump curves
  • 13. In certain systems (admittedly unusual), the pump discharge line may have to run at a much higher elevation than the final discharge point. The fluid must first reach the higher elevation in the system. If the shut-off head is smaller than the static head corresponding to the high point, then flow will not be established in the system. During start-up and checkout of the pump, a quick way to determine if the pump has the potential capacity to deliver the head and flow required, is to measure the shut-off head. This value can be compared to the shut-off head predicted by the performance curve of the pump.
  • 14. Total Head is proportional to the difference in pressure at the discharge vs. the suction of the pump. To obtain a higher head, the rotational speed or the impeller diameter can be increased.
  • 15. • So to calculate your head you need the following... 1. Flow rate in GPM or m^3/hour... 2. Friction losses... We are going to be using the flowrate of 20 GPM with 50 feet of total NOT VERTICAL pipe. [PD-PS/ꝭ]= height(2-1) + Friction Losses(2-1) Head
  • 16. • How To Choose A Pump • Usually we choose a pump on the basis of it’s head which is basically a generic term given to the total mechanical energy content of a fluid at a given point in a piping system. So once we have established the no. of feet and flow rate that we want we want we can go to the manufacturer. 1 Pump 2 S D Reservoir Tank Flow Rate 7GPM .5 inch 15 feet
  • 18. • The table does not know how many feet of pipe you have so therefore it lists pressure loss for a 100 feet of pipe. 100 feet of pipe 48.8 feet of head loss We have 50 feet of pipe =24 feet
  • 20. Height from point 1 to point 2, in our case it is 15ft… 1. You also need to account for the head you’re going to be losing because of the friction and you need to accommodate that, you can calculate the lost head due to friction by the use of tables, here you need to know the nominal diameter of your pipe and flow rate in gal/min…… Now all you have to do is add them up… • Also you ought to add a factor of 15-20 % for a commercial design to the values of the table... (Head) = 15ft + 24ft = 39ft
  • 21. Characteristic Curves • The performance of a given pump is commonly illustrated by plots of actual head, power consumption, and efficiency versus volumetric flow rate. These plots are called characteristic curves. • ΔH is head capacity • P is power of the pump • Ƞ is the pump efficiency • NPSHR
  • 23. 1. Technically if the head and the flow rate operating point for your system is located above on or below a performance curve then that pump will be sufficient to do it’s job (but do remember the economics!)... 2. A fixed speed circulator forces the system to work on it’s curve, a variable speed circulator adjusts its curve to meet the needs of the system.
  • 24. Product Name Pump Curves This Means that at flow of 12 GPM in the product 007-(5) the pump will create a head of 6.4 ft. Or at 4 feet of head the pump will generate a flowrate of 17 GPM. 12 6.4 17 4
  • 25. • Pump Head Compensation • From an industrial point of view pump head is very important, for every elbow/bend in pipe you have to add in a certain no. of head usually in feet in order to accommodate the losses… i.e. 1elbow=2feet then you’d have to add in 2 feet for every time that elbow appears in the piping… • So, you can see here the elbows are causing us 2 feet loss in head every time they appear so we have to add that in order to compensate the losses… We also have 3 ft. loss in head due to the vertical piping, we don’t count in horizontal piping… • So, Total Head = 9ft. + 12ft. + some excess feet to be safe... Pump Tank 22 2 22 2 3 3 3
  • 26. • Cavitations And NPSH • If the suction pressure is only slightly greater than the vapor pressure some liquid may flash to vapor inside the pump a process called as cavitations which greatly reduces the pump capacity and causes severe erosion. If the suction pressure is actually less than the vapor pressure there will be vaporization in the suction line and no liquid can be drawn into the pump. • To avoid the cavitations the pressure at pump inlet must exceed the vapor pressure by a certain value called as the net positive suction head. The required value of NPSH is about 2 to 3 m (5 to 10 ft) for small centrifugal pumps but It increases to 15m (50 ft) are recommended for larger pumps.
  • 29. Rotary Pumps Multi Stage Centrifugal Pumps • High energy centrifugal can generate a head of 200 m only. • To increase the head (>200 m), multistage centrifugal pumps is used where multiple impeller is installed on a single shaft.
  • 31. Pump Priming • What is it? • To remove the entrapped air inside the pump is called pump priming • When we do it? 1.First start up after a long time 2.First start up after maintenance 3.First start up for a new pump • How we do it? • If there is any air entrapped in the suction line, we need to replace this air with liquid. • Air can be displaced by pouring liquid from any tank into the suction line and submerge the pump impeller… Positive displacement pump can compress the gas to a required discharge pressure, that’s why they are known to self priming…
  • 32. Pump Priming Priming of a pump is very essential step in start up of a centrifugal pump. Fact is that centrifugal pump are not capable of pumping air or vapors. Priming is the process in which the impeller of a centrifugal pump will get fully sub merged in liquid without any air trap inside. This is especially required when there is a first start up. But it is advisable to start the pump only after primping. Liquid and slurry pumps can lose prime and this will require the pump to be primed by adding liquid to the pump and inlet pipes to get the pump started. Loss of "prime" is usually due to ingestion of air into the pump. The clearances and displacement ratios in pumps used for liquids and other more viscous fluids cannot displace the air due to its lower density.
  • 33. • Cavitations And NPSH • If the suction pressure is only slightly greater than the vapor pressure some liquid may flash to vapor inside the pump a process called as cavitations which greatly reduces the pump capacity and causes severe erosion. If the suction pressure is actually less than the vapor pressure there will be vaporization in the suction line and no liquid can be drawn into the pump. • To avoid the cavitations the pressure at pump inlet must exceed the vapor pressure by a certain value called as the net positive suction head. The required value of NPSH is about 2 to 3 m (5 to 10 ft) for small centrifugal pumps but It increases to 15m (50 ft) are recommended for larger pumps.
  • 34. Pump Safety A note about centrifugal pump is that it doesn’t require a safety valve while a P.D pump must have a safety valve because at certain pressure C.F pump will stop producing any further pressure while the P.D pump will continue to increase pressure with every stroke until or unless the Safety valve blows or the discharge is opened… Turbulence Turbulence may be generated in other ways than by flowing fluid in a pipe… in general however it results from either of these scenarios, one is the flowing fluid gets In contact with a solid boundary called as the wall turbulence or two fluid layers moving with varying velocities contact called as the free turbulence… Free turbulence is especially important in mixing…