Browsing by Author "Ali, Ezeddin"

Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    Comparison of lifing results of gas turbine operated in base load and as a back up to wind turbine
    (IJRES, 2019-04-30) Mohamed, Saleh; Ali, Ezeddin; Pilidis, Pericles; Sampath, Suresh
    When operating the gas turbine in a flexible mode as a back up to renewable energy sources such as wind, solar, tidal and so on. A fluctuation of power produced by the GT will be apparent which in turn will cause low cycle fatigue in the high-pressure turbine blades. The drive behind this study is to estimate the life of a 100 MW GT operated in a baseload scenario and compare the lifing results with two different scenarios of operating the GT as a back up to a wind turbine operated in the UK in 2016. For the estimation of the GT lifing, some performance parameters are essential such as turbine entry temperature (TET), blade cooling temperature (Tc), and the shaft rotational speed (PCN). All these parameters are obtained from running the in-house TURBOMATCH model, which was developed in Cranfield University, under certain operating conditions (temperature and pressure). These values are used with other parameters as input to a FORTRAN code to estimate the lifing and lifing consumption of the GT. In comparison, it was found that the base load scenario has the highest value of creep while in the backup scenarios the LCF was higher due to the power fluctuation.
  • Thumbnail Image
    ItemOpen Access
    Examination of material variation on the life of gas turbine backing-up renewable energy sources
    (International Organization of Scientific Research, 2019-02-28) Ali, Ezeddin; Sampath, Suresh; Pilidis, Pericles; Mohammed, Saleh
    Gas turbine life and efficiency depend on the operating environment and material performance. Material selection is of prime importance to achieve high life and efficiency. This paper focuses on the study of the effect of material properties and variation in alloy composition ofa high-pressure turbine blade on gas turbine life when works in the flexible mode as a pick-up of renewable sources.A tool has been developed wherein different scenarios can be simulated to obtain engine life consumption factors. The engine life is examined according to the different material for different operating scenarios. It is observed that blade life is highly affected by changing material properties and moreover it is noted that the small change in the mass percentage of some constituent elements of an alloy results in a significant difference in HPT blade life.