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

Gas turbines (GT) have come to play a significant role in distributed energy systems due to its multi-fuel capability, compact size and low environmental impact and reduced cost. Nevertheless, the low electrical efficiency, typically about 30% (LHV), is an important obstruction to the development of the GT plants. New strategies are designed for the GT plant, to increase the overall performance based on the operational modeling and optimization of GT power plants. The enhancing strategies effect on the GT power plant’s performance (with intercooler, two-shaft, reheat and regenerative) based on the real power plant of GT. An analysis based on thermodynamics has been carried out on the modifications of the cycle configurations’ enhancements. Then, the results showed the effect of the ambient and turbine inlet temperatures on the performance of the GT plants to select an optimum strategy for the GT. The performance model code to compare the strategies of the GT plants were developed utilizing the MATLAB software. The results show that, the best thermal efficiency occurs in the intercooler-regenerative-reheated GT strategy (IRHGT); it decreased from 51.5 to 48%, when the ambient temperature increased (from 273 to 327K). Furthermore, the thermal efficiency of the GT for the strategies without the regenerative increased (about 3.3%), while thermal efficiency for the strategies with regenerative increased (about 22%) with increased of the turbine inlet temperature. The lower thermal efficiency occurs in the IHGT strategy, while the higher thermal efficiency occurs in the IRHGT strategy. However, the power output variation is more significant at a higher value of the turbine inlet temperature. The simulation model gives a consistent result compared with Baiji GT plant. The extensive modeling performed in this study reveals that; the ambient temperature and turbine inlet temperature are strongly influenced on the performance of GT plant.

[1]  Wen-Jei Yang.  Reduction of specific fuel consumption in gas turbine power plants , 1997 .

[2]  Paul A. Dellenback.  Improved Gas Turbine Efficiency Through Alternative Regenerator Configuration , 2002 .

[3]  Dries Verstraete,et al.  Impact of heat transfer on the performance of micro gas turbines , 2015 .

[4]  Yousef S.H. Najjar.  Comparison of performance for cogeneration systems using single- or twin-shaft gas turbine engines , 1997 .

[5]  Christopher J. Koroneos,et al.  Optimum gas turbine cycle for combined cycle power plant , 2008 .

[6]  Y. Çengel,et al.  Thermodynamics : An Engineering Approach , 1989 .

[7]  Hongguang Jin,et al.  A chemically intercooled gas turbine cycle for recovery of low-temperature thermal energy , 2006 .

[8]  S. C. Kaushik,et al.  Thermodynamic analysis and parametric study of an intercooled–reheat closed-cycle gas turbine on the basis of a new isentropic exponent , 2011 .

[9]  Rosli Abu Bakar,et al.  Influence of Operation Conditions and Ambient Temperature on Performance of Gas Turbine Power Plant , 2011 .

[10]  A. M. Bassily.  Performance improvements of the intercooled reheat regenerative gas turbine cycles using indirect evaporative cooling of the inlet air and evaporative cooling of the compressor discharge , 2001 .

[11]  Thamir K. Ibrahim,et al.  Effective Parameters on Performance of Multipressure Combined Cycle Power Plants , 2015 .

[12]  Ahmed N. Abdalla,et al.  Gas Turbine Configuration for Improving the performance of Combined Cycle Power Plant , 2011 .

[13]  A. M Bassily.  Performance improvements of the intercooled reheat recuperated gas-turbine cycle using absorption inlet-cooling and evaporative after-cooling , 2004 .

[14]  M. RahmanM.,et al.  Effects of Isentropic Efficiency and Enhancing Strategies on Gas Turbine Performance , 2013 .

[15]  Thamir K. Ibrahim,et al.  Thermal Analysis of Open-Cycle Regenerator Gas-Turbine Power-Plant , 2010 .

[16]  Klaus Brun,et al.  Micromix Combustor for High Temperature Hybrid Gas Turbine Concentrated Solar Power Systems , 2014 .

[18]  Engin Gedik,et al.  Performance analysis of open cycle gas turbines , 2009 .

[19]  Ernst Worrell,et al.  Trend in efficiency and capacity of fossil power generation in the EU , 2009 .

[20]  Tarek Nada,et al.  Performance characterization of different configurations of gas turbine engines , 2014 .

[21]  Mohammad Ameri,et al.  Performance and economic of the thermal energy storage systems to enhance the peaking capacity of the gas turbines , 2005 .

[22]  Luai M. Al-Hadhrami,et al.  Impact of Fuels on Performance and Efficiency of Gas Turbine Power Plants , 2012 .

[23]  M. RahmanM.,et al.  Effect of Compression Ratio on the Performance of Different Strategies for the Gas Turbine , 2014 .

[24]  Sarim Al Zubaidy,et al.  Gas turbine performance at varying ambient temperature , 2011 .

[25]  Thamir K. Ibrahim,et al.  Study on the effective parameter of gas turbine model with intercooled compression process , 2010 .

[26]  Takao Kashiwagi,et al.  Development of efficiency-enhanced cogeneration system utilizing high-temperature exhaust-gas from a regenerative thermal oxidizer for waste volatile-organic-compound gases , 2006 .

[27]  Suleyman Hakan Sevilgen,et al.  Case study: Effect of ambient temperature on the electricity production and fuel consumption of a simple cycle gas turbine in Turkey , 2006 .

[28]  Ahmed N. Abdalla,et al.  Thermodynamic performance analysis of gas-turbine power-plant , 2011 .

[29]  Thamir K. Ibrahima,et al.  Optimum Gas Turbine Configuration for Improving the performance of Combined Cycle Power Plant , 2011 .

[30]  Mahmood Farzaneh-Gord,et al.  A new approach for enhancing performance of a gas turbine (case study: Khangiran refinery) , 2009 .

[31]  Pouria Ahmadi,et al.  Thermo‐economic‐environmental multiobjective optimization of a gas turbine power plant with preheater using evolutionary algorithm , 2011 .

[32]  M. Mousavi,et al.  Two new high-performance cycles for gas turbine with air bottoming , 2011 .

[33]  Kousuke Nishida,et al.  Regenerative steam-injection gas-turbine systems , 2005 .