This paper deals with the theoretical and experimental analysis of carbon coke fed steam power plant performance. Thus, A mathematical model of the generator and of all power plant has been developed and implemented within GateCycle workspace. Using experimental data the mathematical model has been finely tuned and tested in several running conditions in respect of refinery requests. Results analysis has shown that it is able to simulate power plant running in on-design and off-design conditions with low relative errors. Using mathematical model, the effects of steam extraction by the refinery from the “high, medium and low pressure level manifolds” on the turbine efficiency and heat consumption as well as on steam generators performance have been studied. Results analysis has been shown that steam extraction involves a turbine performance reduction. The developed mathematical model could be used to optimize steam turbine efficiency as well as generators performance in order to study the better control strategy.

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