01 flow tech intro
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For internal use only / Siemens AG 2009. All Rights Reserved.
Flow Concepts
Paul Murphy
Siemens Industry Inc.
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Welcome
Siemens Industry, Inc. 2010
An expert is a man from an other town
S. Clemens
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Page 3
Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Flow Concepts
A few things to consider in no particular order
These are issues common to all flow meter technologies
All flow meters are application sensitive- no one technology works best
everywhere- have an open mind
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Flow meter sizing
Maximum flow Rate
Minimum flow rateNormal flow rate
Pipe size
Be realistic, many systems are OVERSIZEDUse the sizing programs when you can
Understand the performance trade off of r ight size vs. convenient size
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Flow Profi le
What is flow profile?
What affects this?
How does it affect measurement?
1. Linearity
2. Repeatabil ity
3. Accuracy
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Flow Profi le
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Reynolds number
What does it mean
Why it is not usually important in water applications
Turbulent vs. laminar flow
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Page 8Flow seminar
Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Flow Calculator
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Whats in the fluid?
Is the fluid clean ?
Suspended solids
Aeration its causes and effects
How this affects flow measurement
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
The effects of aeration
May be measured as liquid, will affect measurement
Velocity based systems -mag, ultrasonic, turbines etc. will generallyread high
Mass meters may read correctly but volume may be erroneous
Processes may be affected- pumps, cooling etc.
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Changes in the fluid
How stable is the process
Are there changes in viscosity, temperature or density
Does pressure change?
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
How stable is pressure?
Pressure transients and problems that they cause
ARVs, PRVs and similar devices
Too much pressure?
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Large line considerations
Access to pipe- often limited
Condition of pipe inside and out
Do you really know the o.d. and w/t?
How round is the pipe?
Is there a way to verify measured flow?
High or low f low velocity?
Full pipes only!
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Page 15Flow seminar
Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
108 Bi-directional flow
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
How does flow velocity affect accuracy andperformance?
Changes in flow profi le
Operating outside the design range for the meter
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Multi-phase Flow
What is multi-phase flow?
Oil and Water
Partially Full Pipe
Excessive aeration
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Some meters require conductive fluids
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Valves
Control valve issues
Block valves
Valve designs are different
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Page 20Flow seminar
Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Whats wrong with this?
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Page 21Flow seminar
Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Whats in the pipe?
Pipe liners-cement lined, concrete
cylinder pipe
Scale and corrosion
Sediment
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Vertical Flow Problems- downward flow
Phase discontinuity and what it means
How to deal with this type application
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Turn down
Min to max flow rate at specified accuracy?
Span adjustment capabil ity of a meter?
Different things to different technologies and different
people!
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Pipe Info
Why do you need to know about pipe?
What you need to know-
1. Some technologies require more info2. o.d., i.d., wall thickness, pipe material
3. Liner material and thickness
4. General characteristics of the pipe-Is it really round, is it an old riveted pipe etc.?
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Page 27Flow seminar Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose
unless authorized by Siemens.
Large riveted pipes1920s vintage
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Siemens Industr y, Inc. 2010This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Calibration
How was it calibrated?
When was it calibrated?
Calibration stories-wwtp, brewery, crude oil, orifice plates-
backwards, wrong size
Can you calibrate a meter in service?
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Flow Lab
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Prover
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
The Real World
What are your real needs? Are you looking for
accuracy, repeatability, reliability..
What are you willing to do to achieve these goals?
Real accuracy always has a price!
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
The Real World- continued
What are your maintenance and support capabilities?
How critical is the application?
What is plan B?
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Siemens Industr y, Inc. 2010
This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purposeunless authorized by Siemens.
Questions, comments..
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For internal use only / Siemens AG 2009. All Rights Reserved.Industry SectorSeite 34 Sep-2009 Author
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For internal use only / Siemens AG 2009. All Rights Reserved.
Paul Murphy
Flow Specialist
4401 El Camino Real
Suite K
Atascadero, CA 93422
Phone: 805-461-1707
Cell: 805-286-2616
E-Mail: murphy.paul@siemens.com
Thank you for your attention!
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