Exergy analysis of the regenerative gas turbine cycle using absorption inlet cooling and evaporative aftercooling

AbstractThis paper provides an exergy analysis to investigate the effects of pressure ratio, turbine inlet temperature, compressor inlet temperature and ambient relative humidity on the thermodynamic performance of a regenerative gas turbine cycle using absorption inlet cooling and evaporative aftercooling. Combined first and second law analysis indicates that the exergy destruction in various components of the gas turbine cycle is significantly affected by compressor pressure ratio and turbine inlet temperature, and slightly varies with the compressor inlet temperature and ambient relative humidity. It also indicates that the maximum exergy destroyed in the combustion chamber; which represents over 60% of the total exergy destruction in the overall system. The net work output, first law efficiency, and second law efficiency of the cycle significantly varies with the change in the pressure ratio, turbine inlet temperature, compressor inlet temperature and ambient relative humidity.

[1]  A. Bejan.  Fundamentals of exergy analysis, entropy generation minimization, and the generation of flow architecture , 2002 .

[2]  A. Bassily.  Performance improvements of the recuperated gas turbine cycle using absorption inlet cooling and evaporative aftercooling , 2002 .

[3]  C. Lanfranchi,et al.  Benefits of Compressor Inlet Air Cooling for Gas Turbine Cogeneration Plants , 1996 .

[4]  M. J. Moran,et al.  Exergy Analysis: Principles and Practice , 1994 .

[5]  Kim Choon Ng,et al.  Improved thermodynamic property fields of LiBr-H2O solution , 2000 .

[6]  Abdul Khaliq,et al.  Thermodynamic performance assessment of an indirect intercooled reheat regenerative gas turbine cycle with inlet air cooling and evaporative aftercooling of the compressor discharge , 2006 .

[7]  Adrian Bejan,et al.  Thermodynamic Optimization of a Gas Turbine Power Plant With Pressure Drop Irreversibilities , 1998 .

[8]  Marc A. Rosen,et al.  Second‐law analysis: approaches and implications , 1999 .

[9]  A. Bejan.  Advanced Engineering Thermodynamics , 1988 .

[10]  Yousef S.H. Najjar,et al.  Enhancement of performance of gas turbine engines by inlet air cooling and cogeneration system , 1996 .

[11]  M. A. Ait-Ali.  Optimum Power Boosting of Gas Turbine Cycles With Compressor Inlet Air Refrigeration , 1997 .

[12]  Maurizio De Lucia,et al.  Benefits of Compressor Inlet Air Cooling for Gas Turbine Cogeneration Plants , 1995 .

[13]  J. B. Young,et al.  Exergy Analysis of Modern Fossil-Fuel Power Plants , 2000 .

[14]  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 .