A feedwater heater is a device used in steam engines, power plants, and boilers to warm up water before it enters the boiler. The heater improves the efficiency of the system by preheating the water, reducing the amount of energy needed to turn it into steam. It works by transferring heat from exhaust gases or steam to the incoming water, raising its temperature. This helps the boiler reach the required pressure and temperature more quickly, saving fuel and energy. Feedwater heaters are important for optimizing the performance of steam-powered systems, including trains and power stations.

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