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Off-design operation of an 900 MW-class power plant with utilization of low temperature heat of flue gases

Milewski J., Bujalski W., Wołowicz M., Futyma K., Kucowski J.

Journal of Power Technologies

2015

Vol. 95, nr 3

221--227

This article presents the off-design operation of a 900 MW-class steam turbine cycle upgraded with utilization of lowtemperature waste heat taken from boiler flue gas. The low-temperature heat contributes to increasing the efficiency of power plants without introducing many complex changes to the whole system. The base for investigations was a power unit operating in off-design conditions and supplied with steam from a BB–2400 boiler. Modifications to the model were made using commercially available software and by applying the Stodola equation and the SCC method. Calculations for off-design conditions show that, after making some modifications to the system, both heat and electricity generation could be increased through the addition of a low-temperature heat exchanger.