Transiente Berechnung des Anfahrvorgangs verschiedener Abhitzedampferzeuger im Kombiprozess (English shop)

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Operational flexibility is becoming increasingly important in power plant engineering. This work investigates the flexibility of various heat recovery steam generator systems by means of dynamic simulation of the start-up process. On the basis of design data, a methodology for modelling the combined cycle power plant was developed and implemented for a commercial reference plant.

By comparing the results with operational measurement data, the reference model could be validated and the suitability of the methodology for further numerical investigations demonstrated. First, the influence of the high-pressure evaporator on the dynamic system behaviour of a heat recovery steam generator was analysed for identical steady-state performance data. Building on this, a novel heat recovery steam generator with supercritical steam parameters was developed and represented in the dynamic process model. The results of the calculations show the effects on efficiency and flexibility with reference to the conventional reference plant.