Performance analysis of open cycle gas turbines

Abstract

SUMMARYIn this study, the performance of ideal open cycle gas turbine system was examined based on its thermodynamic analysis. The effects of some parameters, such as compressor inlet temperature (CIT), pressure ratio (PR) and the turbine inlet temperature (TIT), on the performance parameters of open cycle gas turbine were discussed. The turbine net power output, the thermal efficiency and the fuel consumption of the turbine were taken as the performance parameters. The values of these parameters were calculated using some basic cycle equations and variables values of thermodynamic properties. Other variables such as lower heating value, combustion efficiency and isentropic efficiencies of compressor and turbine were assumed to be constant. The result showed that the net power output and the thermal efficiency increased by a decrease in the CIT and increase in the TIT and PR values. If it is aimed to have a high net power output and the thermal efficiency for the turbine, the CIT should be chosen as low as possible and the TIT should be chosen as high as possible.

Thermodynamic Analysis of a Gas Turbine Power Plant Modelled with an Evaporative Cooler

“…This is because the cooling technique utilizes the latent heat of vaporization to cool ambient temperature from the dry temperature [21]. Evaporative cooling involves passing air across a spray of water or forcing air through a soaked pad that is kept replenished with water [22]. Owing to the low humidity of entering air, a part of the water injected evaporates.…”

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

“…Under the effect of the ambient temperature, the higher exhaust temperature was about 1017 K in the IHGT strategy of the GT. Since the high ambient temperature leads to increase the work of the compressor, then decreased the work net thus increased the losses with exhaust gases [16,26]. At the same time, at the high ambient temperatures, the variations in the exhaust temperature of the GT were significant.…”

“…The huge power generation from the plants is only because of the high turbine inlet temperatures [15]. The thermodynamic model has been suggested by Kurt et al [16], the model measured the performance of the ideal open GT cycle. During the open GT cycle, the effect of parameters has been investigated, such as ambient temperature, compression ratio and turbine inlet temperature.…”

Modelling and Assessment of Effect of Operation Parameters on Gas Turbine Power Plant Performance using First and Second Laws of Thermodynamics

“…where, c pa is the specific heat capacity of air which is considered in this study as a function of temperature and can be fitted using Equation 6 for temperature in the range of 200K<T<800K (Rahman et al, 2011a;Kurt et al, 2009) …”

“…C pg is the specific heat capacity of combustion product (gas) which is considered in this work to be a temperature variable function and can be fitted by Equation 12 for temperature in the range of 1000 K<T<1500 K (Tahouni et al, 2012;Kurt et al, 2009): ( ) …”