1. The steam cooler refers to the heater, whose function is to heat condensed water and feed water. The number of heaters depends on the number of extraction stages. The number of extraction stages must be calculated. It is uneconomical to have more.

2. The economic operation of the heater itself also has a certain influence on the economic operation of the whole unit. Can the extraction pressure meet the design requirements of the heater? The characteristics of heater pipeline, water level and scaling will affect the economy of heater operation.

3. The choice of heater drainage mode is also very important. For example, the use of drainage pump can improve certain economy, but the amount of equipment maintenance is large, and equipment investment will also cost money. For example, if the step-by-step gravity flow automatic adjustment is better, there will be a certain amount of maintenance. If it is adjusted manually, it will often be squeezed out, which is uneconomical. But the system is simple. If dialect multi-stage water seal is adopted, the maintenance amount is small and the operation is stable. However, it will occupy a larger area.

This topic should start with Rankine cycle theory. It must be calculated with data and then compared to explain the problem. Ha ha.

5. Ask experts to supplement incomplete information.