Simple Calculation Model of Combined Cycle Unit Under Off-Design Conditions

Bin SUN, Hao-lan YANG, Dou LI, Jin GAO, Yang SHEN


The modeling of the combined cycle unit is often limited by the lack of characteristic curve and operating data. This paper provided a simple off-design model of combined cycle unit, which was based on theoretical derivation and experimental data. The simulation results showed that the model could reflect the characteristics of gas cycle components and realize the calculation of off-design conditions. The calculation error of heat transfer of HRSG and output of steam turbine under pure coagulation the condition was less than 0.5%.


Combined cycle, Off-design model, Gas cycle, Modular modeling


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