Impact of gas turbine flexibility improvements on combined cycle gas turbine performance

The improvement of gas turbines flexibility has been driven by more use renewable sources power due to environmental concerns. There are different approaches improving turbine flexibility, and they have performance implications for the bottoming cycle in combined (CCGT) operation. CCGT configuration is favourable generating output, higher thermal efficiency that key economic viability electric utility companies. However, benefits obtained often not translated overall In this study, improvements minimum load (MEL) ramp-up rates, facilitated compressor air extraction injection, respectively. modelled based on detailed cascade approach, also using exhaust conditions topping model from recent studies authors. At design full load, verified subsequent off-design cases injection simulations replicated cycle. MEL extension brings about a reduction engine output results steam temperature former. This curtails extended 19% improvement, as opposed 34% stand-alone turbine. For rate with 51% increase was attained. 3% points lower than turbine, arising rate. study shown apply CCGT, despite constraints