Turbine Steam Path
Volume IIIa
Mechanical Design and Manufacture
by William P. Sanders

Turbine Steam Path Volume IIIa contains valuable insight for the engineer faced with design and manufacture decisions.

Turbine Steam Path Volume IIIa focuses to design options and the challenges faced in selecting and arranging the components to optimize unit performance efficiency, reliability, and safety, providing the reader with the necessary information to evaluate the performance, refurbishment, and upgrading of a unit.

Key Benefits:

• Select the right components and find optimal unit arrangement
• Understand the mechanical design and development process
• Organize and prepare performance testing

Contents

1. The Basic Considerations of Thermodynamic Design

• The Thermal Design Process
• Section and Stage Energy
• The Design Philosophy and Specification
• Stage Selection
• State-Line Efficiency
• The Velocity (Vector) Diagrams
• Steam Path Sizing and Arrangement
• Radial Pressure Gradient
• Stage Construction Details
• Feed Water Heating Trains
• Flow Splitting and Steam Extraction

2. The Turbine Steam Path Mechanical Design Process

• The Mechanical Design Process
• Section Arrangement
• The Major Components of the Steam Path
• The Casings
• The Diaphragms and Stationary Blade Rows
• The Rotors
• The Rotating Blades
• The Stage Hardware
• The Sealing System
• The Development of New Turbine Products or Processes
• The Final Design

3. Turbine Steam Path Performance and the Factors Affecting It

• Steam Path Performance
• Steam Path Availability
• State-Line Efficiency
• Stage Efficiency Considerations
• Blade Profile Geometry Group One Losses
• Tie or Lacing Wire Losses
• Stage Geometric Factors Group Two Losses
• Analysis of the Magnitude of Losses
• The Cost of Damage Mechanisms
• Influence of State-Line Efficiency on Heat Rate

4. Performance Testing

• The Purpose of Performance Testing
• Test Costs and Economics
• Classes of Performance Test
• Test Objectives and Requirements
• The Enthalpy Drop Test (EDT)
• Other Test Codes
• The Test Schedule and Advanced Planning
• Test Cycle Isolation
• Test Instrumentation and Calibration
• Simplified ASME PTC-6 Test

Appendix

Index

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