In a steam power plant, feed water heater is a heat...

In a steam power plant, feed water heater is a heat exchanger to preheat feed water by
(a) live steam from steam generator
(b) hot flue gases coming out of the boiler furnace
(c) hot air from air preheater
(d) extracting steam from turbine

Key Concepts

Steam Power Plant

A steam power plant is a facility where water is converted into steam in a boiler by heating it with fuel combustion. The generated steam drives turbines connected to generators, which produce electricity. The entire process involves several stages that ensure efficient energy conversion and management of heat and work within a closed-loop system.

Feedwater Heater

A feedwater heater is a type of heat exchanger used in steam power plants to preheat the feedwater before it enters the boiler. This preheating process raises the temperature of the water, which increases the overall efficiency of the boiler by reducing the energy needed to convert water into steam.

Heat Exchanger

A heat exchanger is a device that transfers thermal energy between two or more fluids at different temperatures without mixing them. In the context of steam power plants, heat exchangers are crucial for improving system efficiency by recovering waste heat and transferring it to the working fluid, such as the feedwater.

Regenerative Feedwater Heating

Regenerative feedwater heating is a process used in steam power plants where steam is extracted from the turbine and used to preheat the feedwater. This process increases the thermal efficiency of the power plant by reducing the amount of fuel needed to raise the water temperature to the required level for steam generation.

Turbine Extraction

Turbine extraction refers to the practice of taking a portion of steam from the turbine during its operation. The extracted steam, which still possesses thermal energy, is then used in various components such as feedwater heaters to improve cycle efficiency and overall performance of the power plant.

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