Effect of Ambient and Operating Parameters on the Exergy Performance of a Marine Gas Turbine Engine 2021-01-1152

The paper presents the effect of ambient and operating parameters on the performance of Marine Gas turbine integrated with vapor refrigeration inlet air cooling. The rational efficiency of gas turbine and along with summation of exergy destruction in all components with and without inlet air cooling has been analyzed. The variation of total exergy destruction of all components indicates that the destruction of exergy is only marginally effected by inlet air cooling. The sensitivity analysis depicting the effect of variation of compressor pressure ratio (rp,c) turbine inlet temperature (TIT), ambient temperature and ambient relative humidity on Gas turbine rational efficiency and non-dimensional component-wise exergy destruction of inlet air cooled gas turbine has been discussed in detail. At higher values of TIT, higher exergy destruction is observed in (%) in gas turbine but exergy destruction is lower (in percentage terms) at higher values of TIT in case of combustion chamber and compressor. Higher value of rp,c demonstrates higher rational efficiency of GT. It is observed that the exergy destruction in the combustor is highest and it exhibits a lower value at lower ambient temperature. The rational efficiency of GT in the inlet air cooled configuration is reported to be higher for inlet air cooling configuration.