Practical Flow Essentials

THE WORKSHOP

This workshop is focussed 100% on flow from process control, tuning, flow instrumentation, control valves to fiscal metering. An introduction is given to the complete flow control system and methods of tuning flow loops followed by an examination of the different flow instruments with an emphasis on typical real-world applications. Close attention is given to special installation considerations and application limitations when selecting and installing different flow instruments.

It is claimed that the majority of control valves installed have not been correctly sized and that large numbers also operate in manual mode. We thus focus on the correct method of sizing and selecting a flow control valve. The course is rounded off by an examination of fiscal metering with a simple introduction to what can be a complex but critical subject involving revenues of millions of dollars.

Mathematical theory has been kept to a minimum and the focus is on practical design, installation, commissioning, troubleshooting and maintenance issues all focussed entirely on flow issues.

WHAT IS INCLUDED?

  • Receive a certificate of attendance in support of your continuing professional commitment
  • All workshops include the associated hardcopy technical manual
  • Printed workshophandouts
  • Lunch and refreshments
  • Interact and network with workshop attendees and experienced instructors
  • Practical, industry driven content to assist you in your continuing professional development (CPD)
  • Attendees automatically become IDC subscribers and receive exclusivedeals and technical content every month

WHO SHOULD ATTEND?

  • Automation engineers
  • Building service designers
  • Chemical and mechanical engineers
  • Consulting engineers
  • Control technicians
  • Control valve specialists
  • Data systems planners and managers
  • DCS personnel
  • Design engineers
  • Electrical engineers
  • Electrical technicians
  • Electricians
  • Energy management consultants
  • Instrumentation and control engineers
  • Instrumentation technicians
  • Maintenance engineers, technicians and planners
  • Measurement technician
  • Operations and production engineers
  • Plant safety specialists
  • Power system protection engineers
  • Process engineers and managers
  • Process operators
  • Project engineers
  • Systems engineers

CONTENT SUMMARY

BASIC CONTROL CONCEPTS

  • Typical manual control
  • Feedback and feed-forward control
  • Block diagrams

BASIC PRINCIPLES OF CONTROL SYSTEMS

  • On/off control
  • Modulation control
  • Principle of closed loop control
  • PID control modes

TUNING OF CLOSED LOOP CONTROL

  • Tuning constants calculation according to Ziegler and Nichols
  • Open loop tuning procedure
  • Closed loop tuning procedure
  • Damped oscillation tuning method
  • Fine tuning of practical control loops
  • Tuning considerations for controllers with saturation and non-saturation output limits

CASCADE CONTROL

  • Equation types for cascade control
  • Initialisation and PV – tracking
  • Use of multiple outputs in cascade control
  • Tuning procedure for cascade control

PRINICPLES OF FLOW MEASUREMENT

  • Basic fluid properties
  • Velocity profiles
  • Multi-phase flows

POSITIVE DISPLACEMENT METERS

  • Sliding vane
  • Oval gear meters
  • Lobed impeller
  • Oscillating piston

INFERENTIAL METERS

  • Turbine meter
  • Woltman meter
  • Propeller type
  • Impeller meters

DIFFERENTIAL PRESSURE METERS

  • Venturi tube meter
  • Venturi and flow nozzles
  • Orifice plate
  • The Dall tube
  • Pitot tube
  • Elbow

VARIABLE AREA METERS

  • Operating principle

ELECTROMAGNETIC FLOWMETERS

  • Construction

ULTRASONIC FLOWMETERS

  • Doppler method
  • Transit time meter

MASS FLOW MEASUREMENT

  • The Coriolis force
  • Multiple phase flow
  • Density measurement
  • Thermal mass meters

OPEN CHANNEL FLOW MEASUREMENT

  • The Weir
  • The flume
  • Level measurement

INTRODUCTION TO CONTROL VALVE THEORY

  • Introduction and definitions
  • Energy types
  • What happens inside a control valve
  • Cavitations and flashing
  • Choked flow
  • Valve co-efficient CV

DIFFERENT TYPES OF CONTROL VALVES

  • Globe valves
  • Butterfly
  • Eccentric disk
  • Ball
  • Rotary plug
  • Diaphragm and pinch

CHARACTERISTICS

  • Equal percent
  • Linear
  • Quick opening
  • Selection method

HIGH PRESSURE DROP APPLICATIONS

  • Cavitations control and elimination
  • Low noise
  • Diffuser plates
  • Chokes
  • Disk stack technology
  • Pressure balanced trim

VALVE SIZING EXAMPLES OF HIGH PRESSURE DROP APPLICATIONS USING COMPUTER PROGRAMS

  • Water – pump bypass
  • Steam – turbine bypass
  • Gas – pressure reducing
  • Oil – choke valve

INSTALLATION AND MAINTENANCE

  • Installation, commissioning and routine maintenance
  • Fault finding
  • Modes of failure

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