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Power Plant Instrumentation and Control Handbook by Ajay Kumar Debnath, Swapan Basu

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6. Deaerators and Heaters

The deaerator is vital equipment in modern, large thermal power plants. From its name it is implied that the primary function is to remove the air, with other objectionable gas ingress, from the main working fluid used by the system.
Feed cycle heaters are popularly called regenerative feed heaters. The concept of providing feed heaters comes from increasing the thermal efficiency of the Rankine cycle on which steam power plants operate, thereby saving fuel and lowering air pollution from flue gas emissions. The plain and simple thought behind putting feed heaters in the cycle is to increase the average temperature of the working medium during the process of heat addition and bringing down the fluid temperature while the ...

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