Effect Of Fuel Composition On Combined Cycle Power Plant Off-design Performances

Thermodynamic performance characteristics of combined cycle power plant with changing of LNG composition were analyzed in this study.Representative design parameters of the gas turbine,which contain a pressure ratio and turbine inlet temperature,were determined by a parametric study for satisfying the rated performances of a certain gas turbine model.The design point analysis was carried out to derive performance parameters of the gas turbine The off-design analysis was subsequently conducted to investigate the variation of performance characteristics of the gas turbine.The temperature-effect curve of the gas turbine envisaged the influence of ambient temperature on the performances.The fuel characteristics are classified by H/C ratio and heating value.In performance curves of the combined cycle,all parameters of the combined cycle can be indicated by polynomial equations.