TG416 – Steam Turbine Performance

TG416 – Steam Turbine Performance

3 days - 21 PDH Credits Awarded



The need to monitor steam turbine performance is very important.   First, of course, there is the overall plant goal to improve plant heat rate (or to maintain a quality heat rate if it is already good).  Second, data regarding steam turbine performance can be very meaningful in planning future steam turbine outage work.  Performance data and its evaluation can explain abnormalities and lessen the magnitude of surprises when the machine is opened.  In this class you will…..
  • Learn what to consider for improved turbine performance.
  • Learn which turbine components are susceptible to damage that will impact unit performance.· Learn how to test for turbine performance.
  • Learn how different turbine design considerations impact performance.
  • Given steam path reports, learn to evaluate performance issues; i.e., make better repair/replace/reuse decisions.
  • Learn how to communicate more effectively with performance consultants.
  • Learn how to maximize performance of your steam turbine(s) through thought-out operating procedures, monitoring equipment operations, maintenance, inspection and design.
This course is designed for engineers, operation superintendents, maintenance superintendents who at a minimum are familiar with steam turbine components and most basic theory. A topical outline includesBasic Thermodynamics, Stage Design, Test Methods, Cycle Considerations, Instrumentation, Maintaining Thermodynamic Performance, Reducing Solid Particle Erosion Damage, Unit Monitoring and Data Evaluation, Economic Payback, Steam Path Evaluation


Upon completion of this course the participant should be able to:
  1. Locate all the major turbine components and systems.
  2. Describe those thermodynamic laws that are directly applied to the design and operation of steam turbines.
  3. Describe the design and operation of a turbine stage using thermodynamic principles.
  4. Describe how stage performance can deteriorate and how this deterioration is detected and corrected.
  5. Describe techniques used to test the performance of fossil and nuclear turbines.
  6. Describe packing designs that provide variable clearances from start up to full load operations.
  7. Describe two methods used to determine leakage flow on opposed flow steam turbines.
  8. Define the critical cycle parameters and selection of appropriate instrumentation to set up an effective testing or monitoring program.
  9. Demonstrate a fundamental understanding of the erosion mechanisms in the steam path.
  10. Describe alternative erosion prevention techniques.
  11. Describe each of the different components of an overall program to achieve optimum steam turbine thermal performance through cost-efficiency maintenance.
  12. Describe how outages may be optimized by providing an assessment of the parts and repair procedures that will be required in the next outage to cover performance degradation.
  13. Describe how to reduce forced outages by detecting incipient problems at an early stage.
  14. Describe how to perform economic evaluations of the available repair/replace options in order to determine which will optimize maintenance expenditures and maximize return on investment.

Course Outline

  1. Basic Thermodynamics: Properties of a Fluid, Cycles, Sankey Diagram, Heat Balance Diagram, Fundamental Stage Design, Heat Balances and Thermal Kits
  2. Stage Design: Definitions, Acceleration of Steam, Vector Diagrams, Reaction, Velocity Ratio, Stage Efficiency as a Function of Velocity Ratio, Vortex Stage Design, Off Design Conditions, and Losses
  3. Test Methods: Fossil Performance Testing, Nuclear Performance Testing, Testing to Detect Change in Performance in a Steam Turbine Cycle, Test Uncertainty, Instrumentation, Isolation
  4. Cycle Considerations: Positive Pressure Variable Clearance Packing, Principles of Seal Ring Closure, Operation, Isolation, N-2 Packing Leakage, Blowdown System, Variation of Initial/Reheat Steam Temperature
  5. Instrumentation: The First Step to Accurate Testing and Monitoring: Temperature/Pressure/Flow, Electrical Load and Control Valve Lift
  6. Maintaining Thermodynamic Performance: Performance: Testing, Causes of Deterioration, Solid Particle Erosion, Evaluation of Performance Loss, and Restoring Thermal Performance
  7. Reducing Solid Particle Erosion Damage: Dynamic Analysis of Particles in Steam Path, Coatings for SPE Resistance and Prevention Concepts
  8. Unit Monitoring and Data Evaluation: Performance Monitoring, Steam Path Evaluation, Diagnostics
  9. Economic Payback: Economic Concepts, Payback Analysis, Outage Cost Calculations, Recoverable and Non-Recoverable Losses
  10. Steam Path Evaluation: Steam Path Evaluation, Engineered Repairs of Steam Path Components for Performance Efficiency, Role of Performance Monitoring in Outage Planning

Course Dates / Location / Fee

See for detail on the course dates / locations / and registration fees. HPC’s 3-4-2 policy applies:  Sign up 3 for the same course/date, pay in advance, and pay for only 2 (the 3rd participant is free)! HPC Technical Services reserves the right to cancel any course/seminar within 10-working days of the scheduled date.  Fees are 100% refunded or credited to another Seminar (clients' choice) if HPC should cancel any Seminar.  HPC is not responsible for non-refundable airline tickets or other travel expenses under any circumstance.

Frequently Asked Questions

  • Will HPC Technical Services bring this course to our location for our personnel only? YES, call or email Stephen Parker, for a price quotation.
  • Will HPC Technical Services customize the presentation at our site to suit our particular needs?
  • Is HPC Technical Services' textbook available for purchase as a reference document?
  • What is the cost for HPC Technical Service to deliver this course at our location? Well, of course that can vary, but generally speaking, if you're planning on having 6+ attend, when considering your T&L, it is to your advantage to perform the course at your plant (office).  You gain from the customization and price.
  • Can HPC Technical Services provide "Technical Assistance" in providing a steam path audit or performance analysis? Yes we can.  Call or contact Stephen Parker, for our rate sheets and any further information required.

What you will receive

  1. 1 copy of HPC Technical Services' textbook, Steam Turbine Performance.
  2. A "Certificate of Completion" with 31 PDH awarded.

Steam Turbine Maintenance Certification

There are two levels of certification (Both levels require this course):
  1. Engineer
  2. Mechanical Technician
Those who attend this course are automatically qualified to take HPC Technical Services' Certification Examination.  This examination is offered at no additional expense to the participant.  An 80% passing grade is required.  The examination length will not exceed 2-hours.  Those who complete this examination will receive a revised "certificate of completion" that recognizes this accomplishment along with two-copies of a "To Whom It May Concern" letter that states their accomplishment.  (Two copies are provided, one for the participants' employer and one for the participants' personal file.)  Consult HPC's website,, for detail on this certification program.