In relation to a closed feedwater heater, where should the feedwater pump be located?

The optimal placement of the feedwater pump in relation to a closed feedwater heater is before the heater to manage cooler water. This configuration allows the feedwater to enter the heater at a lower temperature and be heated efficiently as it flows through the unit.

By positioning the pump upstream of the heater, the cooler feedwater is subjected to the heat supplied by the heater, which enhances overall thermal efficiency. The feedwater is preheated, making it easier for the boiler to reach the necessary temperatures with less energy input. This preheating process reduces the thermal shock to the system and improves the overall efficiency and performance of the steam generation process.

Placing the pump after the heater would mean that the water being pumped is already heated, which could lead to issues with pump materials, efficiency, and the potential for cavitation if the pump is not designed to handle high-temperature fluids effectively. Additionally, locating the pump directly on top of the heater or to the side can complicate maintenance, and may not contribute to the effective thermal management of the system. Thus, having the feedwater pump positioned before the heater is the most beneficial strategy.