This document provides information on calculating head losses in piping systems. It discusses the use of Bernoulli's equation to relate total head between two points in a piping system. It also covers friction losses using the Darcy-Weisbach equation and the Moody diagram, as well as "minor losses" from fittings, valves, etc. The document presents methods to calculate head loss or flow rate given the other, including iterative techniques. It concludes with an example problem calculating maximum flow between reservoirs considering major and minor losses.
This presentation was created to provide a quick refresher to single-phase fluid flow line sizing. The content of this presentation was obtained from various literature (handbooks and website).
Please provide your comments
Basics of two phase flow (gas-liquid) line sizingVikram Sharma
This article was produced with the objective to provide a condensed fundamental insight in gas-liquid line sizing using Lockhart-Martinelli correlation. The content of this article is purely academic by nature.
This presentation was created to provide a quick refresher to single-phase fluid flow line sizing. The content of this presentation was obtained from various literature (handbooks and website).
Please provide your comments
Basics of two phase flow (gas-liquid) line sizingVikram Sharma
This article was produced with the objective to provide a condensed fundamental insight in gas-liquid line sizing using Lockhart-Martinelli correlation. The content of this article is purely academic by nature.
Line Sizing presentation on Types and governing Equations.Hassan ElBanhawi
Based on my 8 years of experience in Oil & Gas industry I can claim that you can find here All what you need to know about Pipeline Sizing. This is an introduction to understand more about their:-
-The basic idea.
-Simplified method for calculations.
-Equations.
-Data Tables.
-Worked Examples.
-Excel Sheets for Calculation.
-Links to other topics which may be interesting.
You can find also more at:
http://hassanelbanhawi.com/staticequipment/linesizing/
All the data and the illustrative figures presented here can be found through two reference books:-
ENGINEERING DATA BOOK by Gas Processors Suppliers Association
Process Technology - Equipment and Systems by Charles E. Thomas
Thank you.
Liquid Piping Systems, Minor Losses: Fittings and Valves in Liquid Piping Systems, Sizing Liquid Piping Systems; Fluid Machines (Pumps) and Pump–Pipe Matching, Design of Piping Systems complete with In-Line or Base-Mounted Pumps
CENTRIFUGAL COMPRESSOR SETTLE OUT CONDITIONS TUTORIALVijay Sarathy
Centrifugal Compressors are a preferred choice in gas transportation industry, mainly due to their ability to cater to varying loads. In the event of a compressor shutdown as a planned event, i.e., normal shutdown (NSD), the anti-surge valve is opened to recycle gas from the discharge back to the suction (thereby moving the operating point away from the surge line) and the compressor is tripped via the driver (electric motor or Gas turbine / Steam Turbine). In the case of an unplanned event, i.e., emergency shutdown such as power failure, the compressor trips first followed by the anti-surge valve opening. In doing so, the gas content in the suction side & discharge side mix.
Therefore, settle out conditions is explained as the equilibrium pressure and temperature reached in the compressor piping and equipment volume following a compressor shutdown
Pumps are widely used in process plants to transfer fluid from one point to the other and the Process Engineer is often required to specify the correct size of pumps that will optimize system performance. Though pump sizing can easily be performed using software such as Pipe-Flo®, understanding the basic principle will not only aid one to better interpret the results obtained by pump sizing software but also to better design pumps. Centrifugal pump sizing overview is presented in this tutorial.
An overview of distillation column design concepts and major design considerations. Explains distillation column design concepts, what you would provide to a professional distillation column designer, and what you can expect back from a distillation system design firm. To speak with an engineer about your distillation column project, call EPIC at 314-207-4250.
Excel sheet Download Link: https://www.scribd.com/document/385945712/PSV-Sizing-Tool-API-Based-Calc-Sheets
PSV Sizing for Blocked Liquid Discharge Condition
PSV Sizing for Blocked Gas Discharge Condition
PSV Sizing for Fire Case of Liquid Filled Vessel
PSV Sizing for Control Valve Fail Open Case
Relief Valve Sizing for Thermal Expansion
Restriction Orifice Sizing for Gas Flow
Restriction Orifice Sizing for Liquid Flow
Single Phase Flow Line Sizing Tool
Gas Control Valve Sizing Tool
Centrifugal pumps are machines which use centrifugal force to move liquids. In this program, you will learn the principles, parts, and general operation of these pumps, what pump efficiency is, and how head and pressure are calculated.
Centrifugal Pumps - Concept E-Learning Program - Study MaterialPankaj Khandelwal
Study Material of Koncept Learning Center's Concept E-Learning Program on Distillation .
The course is directed by Mr. Pankaj Khandelwal
Centrifugal pump is one of the widely used liquid transportation rotary equipment in most of the industries either for the chemical transfer or utilities circulation.
Like any pumps, it also increases fluid energy due to which liquid is transferred from its low energy source to high energy destination. Impeller plays a major role for this purpose. Impeller is driven by the suitable drive either by the electric motor or diesel engine set.
Centrifugal pump supplier’s have their own pump designs while users have vary much varied applications from low flow & high differential pressure to high flow & low differential pressure. Thus the selection of centrifugal pumps is critical. This is done by matching duty point determined by the user and the characteristics curves supplied by the suppliers.
Contents:
1) Why Pump is required?
2) Pumping System
3) Industrial applications
4) Parts of Pumps
5) MWC Concepts
6) Fluid Energy Concepts
7) Cavitation Concepts
8) Characteristics Curves
9) Hydraulic Calculations
10) Pump Selection
For course details - klcenter@gmail.com / www.konceptlearningcenter.com
Call / Whatsapp - 8237829150 or 9371121220
Prithviraj Khandelwal
This PPT is designed to give you a high level overview of Android as a development platform. It provide introduction to what the Android operating system is, how we got here, what makes it fundamentally different than any other platform, and how to take advantage of its uniqueness. By the end of this course, you will have a complete understanding of the entire operating system, at a high level
Line Sizing presentation on Types and governing Equations.Hassan ElBanhawi
Based on my 8 years of experience in Oil & Gas industry I can claim that you can find here All what you need to know about Pipeline Sizing. This is an introduction to understand more about their:-
-The basic idea.
-Simplified method for calculations.
-Equations.
-Data Tables.
-Worked Examples.
-Excel Sheets for Calculation.
-Links to other topics which may be interesting.
You can find also more at:
http://hassanelbanhawi.com/staticequipment/linesizing/
All the data and the illustrative figures presented here can be found through two reference books:-
ENGINEERING DATA BOOK by Gas Processors Suppliers Association
Process Technology - Equipment and Systems by Charles E. Thomas
Thank you.
Liquid Piping Systems, Minor Losses: Fittings and Valves in Liquid Piping Systems, Sizing Liquid Piping Systems; Fluid Machines (Pumps) and Pump–Pipe Matching, Design of Piping Systems complete with In-Line or Base-Mounted Pumps
CENTRIFUGAL COMPRESSOR SETTLE OUT CONDITIONS TUTORIALVijay Sarathy
Centrifugal Compressors are a preferred choice in gas transportation industry, mainly due to their ability to cater to varying loads. In the event of a compressor shutdown as a planned event, i.e., normal shutdown (NSD), the anti-surge valve is opened to recycle gas from the discharge back to the suction (thereby moving the operating point away from the surge line) and the compressor is tripped via the driver (electric motor or Gas turbine / Steam Turbine). In the case of an unplanned event, i.e., emergency shutdown such as power failure, the compressor trips first followed by the anti-surge valve opening. In doing so, the gas content in the suction side & discharge side mix.
Therefore, settle out conditions is explained as the equilibrium pressure and temperature reached in the compressor piping and equipment volume following a compressor shutdown
Pumps are widely used in process plants to transfer fluid from one point to the other and the Process Engineer is often required to specify the correct size of pumps that will optimize system performance. Though pump sizing can easily be performed using software such as Pipe-Flo®, understanding the basic principle will not only aid one to better interpret the results obtained by pump sizing software but also to better design pumps. Centrifugal pump sizing overview is presented in this tutorial.
An overview of distillation column design concepts and major design considerations. Explains distillation column design concepts, what you would provide to a professional distillation column designer, and what you can expect back from a distillation system design firm. To speak with an engineer about your distillation column project, call EPIC at 314-207-4250.
Excel sheet Download Link: https://www.scribd.com/document/385945712/PSV-Sizing-Tool-API-Based-Calc-Sheets
PSV Sizing for Blocked Liquid Discharge Condition
PSV Sizing for Blocked Gas Discharge Condition
PSV Sizing for Fire Case of Liquid Filled Vessel
PSV Sizing for Control Valve Fail Open Case
Relief Valve Sizing for Thermal Expansion
Restriction Orifice Sizing for Gas Flow
Restriction Orifice Sizing for Liquid Flow
Single Phase Flow Line Sizing Tool
Gas Control Valve Sizing Tool
Centrifugal pumps are machines which use centrifugal force to move liquids. In this program, you will learn the principles, parts, and general operation of these pumps, what pump efficiency is, and how head and pressure are calculated.
Centrifugal Pumps - Concept E-Learning Program - Study MaterialPankaj Khandelwal
Study Material of Koncept Learning Center's Concept E-Learning Program on Distillation .
The course is directed by Mr. Pankaj Khandelwal
Centrifugal pump is one of the widely used liquid transportation rotary equipment in most of the industries either for the chemical transfer or utilities circulation.
Like any pumps, it also increases fluid energy due to which liquid is transferred from its low energy source to high energy destination. Impeller plays a major role for this purpose. Impeller is driven by the suitable drive either by the electric motor or diesel engine set.
Centrifugal pump supplier’s have their own pump designs while users have vary much varied applications from low flow & high differential pressure to high flow & low differential pressure. Thus the selection of centrifugal pumps is critical. This is done by matching duty point determined by the user and the characteristics curves supplied by the suppliers.
Contents:
1) Why Pump is required?
2) Pumping System
3) Industrial applications
4) Parts of Pumps
5) MWC Concepts
6) Fluid Energy Concepts
7) Cavitation Concepts
8) Characteristics Curves
9) Hydraulic Calculations
10) Pump Selection
For course details - klcenter@gmail.com / www.konceptlearningcenter.com
Call / Whatsapp - 8237829150 or 9371121220
Prithviraj Khandelwal
This PPT is designed to give you a high level overview of Android as a development platform. It provide introduction to what the Android operating system is, how we got here, what makes it fundamentally different than any other platform, and how to take advantage of its uniqueness. By the end of this course, you will have a complete understanding of the entire operating system, at a high level
Pressure Relief Valve Sizing for Single Phase FlowVikram Sharma
This presentation file provides a quick refresher to pressure relief valve sizing for single phase flow. The calculation guideline is as per API Std 520.
Estimation of Pressure Drop in Pipe Systems
0 INTRODUCTION/PURPOSE
1 SCOPE
2 FIELD OF APPLICATION
3 DEFINITIONS
3.1 units
4 SOURCES OF DATA
5 BASIC CONCEPTS
5.1 Equation for Pressure Change in a Flowing
Fluid
5.2 Static and Stagnation Pressures
5.3 Sonic Flow
6 INCOMPRESSIBLE FLOW IN PIPES OF CONSTANT
CROSS-SECTION
6.1 Straight Circular Pipes
6.2 Ducts of Non-circular Cross-section
6.3 Coils
6.4 General Equation for Incompressible Flow
in Pipes of Constant Cross-section
7 COMPRESSIBLE FLOW IN PIPES OF CONSTANT
CROSS-SECTION
7.1 Isothermal Flow
7.2 Adiabatic Flow
7.3 Estimation of Pressure Drop for Adiabatic
Flow in Pipes of Constant Cross-section
7.4 Ratio of Isothermal to Adiabatic Pressure Drop
8 FLOW IN PIPE FITTINGS
8.1 Incompressible Flow
8.2 Compressible Flow
9 FLOW IN BENDS
9.1 Incompressible Flow in Bends
9.2 Compressible Flow in Bends
10 CHANGES IN CROSS-SECTIONAL AREA
9.1 Incompressible Flow
9.2 Compressible Flow
11 ORIFICES, NOZZLES AND VENTURIS
11.1 Incompressible Flow through an Orifice
11.2 Compressible Flow through an Orifice or Nozzle
11.3 Venturi Choke Tubes
12 VALVES
12.1 General
12.2 Incompressible Flow in Valves
12.2 Compressible Flow in Valves
13 COMBINING AND DIVIDING FLOW
9.1 Incompressible Flow
9.2 Compressible Flow
14 COMPUTER PROGRAMS FOR FLUID FLOW
15 NOMENCLATURE
16 REFERENCES
APPENDICES
A BASIC THERMODYNAMICS
B COMPRESSIBLE FLOW THROUGH ORIFICES
C THE ‘TWO-K’ METHOD FOR FITTING PRESSURE LOSS
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Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
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https://alandix.com/academic/papers/synergy2024-epistemic/
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Pipe sizing
1.
Major & Minor Losses
Under Supervision of:
Prof. Dr. Mahmoud Fouad
By students:
Mahmoud Bakr 533
Mohammed Abdullah 511
Moaz Emad
619 Mohammed Nabil Abbas 525
3. How big does the
pipe have to be to carry
3
a flow of x m /s?
4. Bernoulli's Equation
The basic approach to all piping systems is to write
the Bernoulli equation between two points, connected
by a streamline, where the conditions are known. For
example, between the surface of a reservoir and a pipe
. outlet
The total head at point 0 must match with the total
head at point 1, adjusted for any increase in head due
to pumps, losses due to pipe friction and so-called
"minor losses" due to entries, exits, fittings, etc. Pump
head developed is generally a function of the flow
through the system
6. Friction Losses in Pipes
Friction losses are a complex function of the system
geometry, the fluid properties and the flow rate in the
system. By observation, the head loss is roughly
proportional to the square of the flow rate in most
engineering flows (fully developed, turbulent pipe
flow). This observation leads to the Darcy-Weisbach
equation for head loss due to friction
7.
8.
9. For laminar flow, the head loss is proportional to
velocity rather than velocity squared, thus the friction
factor is inversely proportional to velocity
10. Turbulent flow
For turbulent flow, Colebrook (1939) found an
implicit correlation for the friction factor in round
pipes. This correlation converges well in few
iterations. Convergence can be optimized by slight
under-relaxation.
11. The familiar Moody Diagram is a log-log plot of the Colebrook
correlation on axes of friction factor and Reynolds number,
combined with the f=64/Re result from laminar flow. The plot
below was produced in an Excel spreadsheet
13. Pipe roughness
pipe material
glass, drawn brass, copper
commercial steel or wrought iron
asphalted cast iron
galvanized iron
cast iron
concrete
rivet steel
corrugated metal
PVC
pipe roughness ε (mm)
0.0015
0.045
ε
0.12
d Must be
0.15 dimensionless!
0.26
0.18-0.6
0.9-9.0
45
0.12
14. Calculating Head Loss for a Known Flow
From Q and piping determine Reynolds Number,
relative roughness and thus the friction factor.
Substitute into the Darcy-Weisbach equation to
obtain head loss for the given flow. Substitute into the
Bernoulli equation to find the necessary elevation or
pump head
15. Calculating Flow for a Known Head
Obtain the allowable head loss from the Bernoulli
equation, then start by guessing a friction factor. (0.02
is a good guess if you have nothing better.) Calculate
the velocity from the Darcy-Weisbach equation. From
this velocity and the piping characteristics, calculate
Reynolds Number, relative roughness and thus
. friction factor
Repeat the calculation with the new friction factor until
sufficient convergence is obtained. Q = VA
16. "Minor Losses"
Although they often account for a major portion of the head loss,
especially in process piping, the additional losses due to entries
and exits, fittings and valves are traditionally referred to as
minor losses. These losses represent additional energy
dissipation in the flow, usually caused by secondary flows
induced by curvature or recirculation. The minor losses are any
head loss present in addition to the head loss for the same
. length of straight pipe
Like pipe friction, these losses are roughly proportional to the
square of the flow rate. Defining K, the loss coefficient, by
17. . K is the sum of all of the loss coefficients in the
length of pipe, each contributing to the overall head
loss
Although K appears to be a constant coefficient, it
varies with different flow conditions
: Factors affecting the value of K include
.,the exact geometry of the component
.the flow Reynolds number , etc
18. Some types of minor losses
Head Loss due to Gradual Expansion (Diffuser)
(V1 −V2 ) 2
hE = K E
2g
2
2
V A
hE = K E 2 2 −1
2 g A1
KE
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
20
40
60
80
diffusor angle ()
19. Sudden Contraction
2
1
V2
hc =
−1 2
C
2g
c
V2
V1
flow separation
losses are reduced with a gradual contraction = Ac
C
c
A2
21. Entrance Losses
Losses can be
reduced by
accelerating the
flow gradually and
eliminating the
he = K e
K e ≈1.0
K e ≈ 0 .5
vena contracta
K e ≈ 0.04
V2
2g
22. Head Loss in Bendspressure
High
Head loss is a function of
the ratio of the bend radius
to the pipe diameter (R/D)
Velocity distribution
returns to normal several
pipe diameters
downstream
Possible
separation
from wall
R
D
Low pressure
hb = K b
Kb varies from 0.6 - 0.9
V2
2g
23. Head Loss in Valves
Function of valve type and valve
position
The complex flow path through
valves can result in high head loss
(of course, one of the purposes of
a valve is to create head loss when
it is not fully open)
hv = K v
V2
2g
24. To calculate losses in piping systems with both pipe
friction and minor losses use
26. Iterative Techniques for D and Q
(given total head loss)
Assume all head loss is major head loss.
Calculate D or Q using Swamee-Jain equations
Calculate minor losses
Find new major losses by subtracting minor losses
from total head loss
27. Solution Technique: Head Loss
Can be solved directly
hminor = K
Re =
V
2
hminor = K
2g
4Q
π ν
D
f =
8Q 2
gπ 2 D 4
0.25
2
ε
5.74
+
log
3.7 D Re 0.9
hl = ∑ f +∑ minor
h
h
hf = f
8
LQ 2
gπ 2 D 5
28. Solution Technique:
Discharge or Pipe Diameter
Iterative technique
Set up simultaneous equations in Excel
Re =
4Q
π ν
D
hminor = K
f =
0.25
2
ε
5.74
log
+
0 .9
3.7 D Re
8Q 2
gπ 2 D 4
hl = ∑ f +∑ minor
h
h
hf = f
8
LQ 2
gπ 2 D 5
Use goal seek or Solver to
find discharge that makes the
calculated head loss equal
the given head loss.
29. Example: Minor and Major Losses
Find the maximum dependable flow between the
reservoirs for a water temperature range of 4ºC to 20ºC.
Water
25 m elevation difference in reservoir water levels
Reentrant pipes at reservoirs
Standard elbows
2500 m of 8” PVC pipe
1500 m of 6” PVC pipe
Sudden contraction
Gate valve wide open
30. Directions
Assume fully turbulent (rough pipe law)
find f from Moody (or from von Karman)
Find total head loss
Solve for Q using symbols (must include minor
losses) (no iteration required)
Obtain values for minor losses from notes or text
31. Example (Continued)
What are the Reynolds number in the two pipes?
Where are we on the Moody Diagram?
What value of K would the valve have to produce to
reduce the discharge by 50%?
What is the effect of temperature?
Why is the effect of temperature so small?
32. Example (Continued)
Were the minor losses negligible?
Accuracy of head loss calculations?
What happens if the roughness increases by a factor
of 10?
If you needed to increase the flow by 30% what could
you do?
Suppose I changed 6” pipe, what is minimum
diameter needed?