When you complete this lesson, you will be able to describe feedwater heater operations and discuss problems that affect performance. • Describe the normal operations of a feedwater heater • Identify problems commonly associated with feedwater heaters and describe how they affect unit efficiency and reliability • Discuss the following methods of evaluating feedwater heater performance. – Feedwater heater temperature rise – Drain Cooler Approach (DCA) – Terminal Temperature Difference (TTD)