Heat Rate Optimization

The objective of this module is to present the actions an operator can take to correct efficiency problems related to the turbine cycle.

Upon completion of this module and workbook, the operator should be able to:

• Recognize the conditions related to condenser tube fouling.
• Calculate TTD for a condenser.
• Calculate the circulating water temperature rise across a condenser.
• Take operational actions to eliminate or reduce a fouled condenser condition.
• Recognize the conditions that indicate a low circulating water flow.
• Determine the cause(s) of a low circulating water flow.
• Determine if subcooling is occurring in the condenser.
• Recognize a high back pressure problem caused by excessive “heat loading” on the condenser.
• Recognize and correct air in-leakage.
• Observe temperature limitations during start-up.
• Avoid thermal stress using “full-arc” operation and proper temperature ramp rates.
• Recognize a condition of a build-up of deposits on the turbine’s steam path.
• Be aware of the affect of increasing generator hydrogen pressure.
• Know the significance of the generator capability curve.