• Power generation
• Co-generation
• Combined cycle
• Fluidized bed boilers
• Energy from waste

Metso DNA Steam Turbine Performance Monitoring

The Metso DNA Steam Turbine Performance Monitoring
(DNA Steam Turbine Monitoring) application calculates, stores and displays the main performance parameters that indicate condition and operating efficiency of steam turbines. The calculations are based on steam turbine heat balance and built in accordance with appropriate DIN- and ASME-standards.

The storing of history values enables long-term reporting and trending of performance parameters thus helping to detect gradual changes in steam turbine performance.

Introduction

Meeting the growing requirements for cost-effective and undisturbed operation in today’s economical environment drives power plants to reach for the best possible performance and higher availability. Power plants can no longer afford to operate without knowing the exact steam turbine performance at all times and without taking immediate actions when problems occur. Steam turbine performance has a remarkable effect on power plant economy - Efficiency drop of 2 % in 100 MW condensing steam turbine causes 300 000 EUR production loss, unless the repair is optimally scheduled.

The DNA Steam Turbine Monitoring - a Metso DNA Plant Management application* - provides the power plant maintenance and operating personnel with valuable information about the performance, condition and operating efficiency of steam turbines both in real time and in history.

The user interface of the application consists of customized display(s) and report(s) containing the measured and/or calculated data. All calculations are based on existing instrumentation.

The DNA Steam Turbine Monitoring is a standardized application that can be used for both back-pressure, district heating and condensing type steam turbines. The application is also suitable for all commonly used manufacturer’s steam turbines.

Benefits

The DNA Steam Turbine Monitoring provides the power plant maintenance and operating personnel with a tool that helps to detect potential problems in steam turbine operation and analyze the problems that have occurred. This contributes towrards proactively responding to failures before they cause unpredicted shutdowns.

The extensive storage of history data also enables long- term monitoring of gradual component deterioration, such as turbine-blade-deposit accumulation and thus improves scheduling of maintenance.

The DNA Steam Turbine Monitoring application is linked seamlessly to the overall automation applications, which guarantees efficient collaboration between plant management and plant control.

Features

The application includes calculation of the steam turbine heat balance, mass balance and the main performance parameters depending on the steam turbine type.

• Back-pressure turbine: steam rate
• District heating turbine: power to heat ratio
• Condensing steam turbine: heat rate

The calculations of performance parameters are based on generally accepted standards including

• DIN 1943. Steam Turbines - Acceptance Tests
• ANSI PTC 6S. Procedures for Routine Performance Tests of Steam Turbines
• ANSI/ASME PTC6 Steam Turbines

The user interface of the application collects the performance data of the steam turbine into easy-to-understand and -work-with report(s) and display(s).

The Steam Turbine Performance Display shows the current status of the steam turbine heat and mass balance together with the steam turbine performance parameters in a visualized form.

The Steam Turbine Performance Report represents the long- term summary values of the steam turbine heat balance, mass balance and performance parameters.

Trends - for selected performance values - can be utilized to provide a quick overview of the performance as well as the direction and magnitude of change.

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*The Metso DNA Plant Management consists of modular applications specifically developed for the energy industry to meet the monitoring, reporting and production optimisation needs of power plants.

The Plant management applications are designed to assist in all areas of power plant operation - from management to production and maintenance.