Energy and Exergy Analysis of Brayton-Diesel Cycle

In this work the energy and exergy analysis of a hybrid gas turbine cycle has been presented. The thermodynamic characteristic of Brayton-diesel cycle is considered in order to establish its importance to future power generation markets. Mathematical modeling of Brayton-diesel cycle has been done at component level. Based on mathematical modeling, a computer code has been developed and the configuration has been subjected to thermodynamic analysis. Results show that, at any turbine inlet temperature (TIT) the plant specific work initially increases with increase of pressure ratio (rp,c), and but at very high values of rp,c, it starts decreasing. For a fixed value of rp,c (more than 10) with the increase in TIT, plant efficiency and specific work both increase. The cycle is best suited for applications where power requirement ranges between 700-900 kJ/kg. The exergy analysis shows that maximum exergy loss of around 27% occurs in during combustion in the plant. Index Terms— Diesel cycle, exergy, exergy loss, gas turbine cycle, hybrid.

[1]  Jinyue Yan,et al.  Humidified gas turbines—a review of proposed and implemented cycles , 2005 .

[2]  Roberto Gabbrielli,et al.  Thermodynamic Performance Analysis of New Gas Turbine Combined Cycles With No Emissions of Carbon Dioxide , 2003 .

[3]  Pradeep Kumar,et al.  Thermodynamic Evaluation of Humidified Air Turbine (HAT) Cycles , 2004 .

[4]  Onkar Singh,et al.  Energy and exergy analysis of steam cooled reheat gas–steam combined cycle , 2007 .

[5]  Sanjay,et al.  Influence of different means of turbine blade cooling on the thermodynamic performance of combined cycle , 2008 .

[6]  J. H. Horlock.  The Evaporative Gas Turbine [EGT] Cycle , 1998 .

[7]  Ennio Macchi,et al.  An Assessment of the Thermodynamic Performance of Mixed Gas-Steam Cycles: Part B—Water-Injected and HAT Cycles , 1995 .

[8]  Atsushi Tsutsumi,et al.  Combinations of solid oxide fuel cell and several enhanced gas turbine cycles , 2003 .

[9]  Waldyr Luiz Ribeiro Gallo,et al.  A comparison between the hat cycle and other gas-turbine based cycles: Efficiency, specific power and water consumption , 1997 .

[10]  Electo Eduardo Silva Lora,et al.  Influence of ambient temperature on combined-cycle power-plant performance , 2005 .

[11]  Simon Harvey,et al.  Thermodynamic analysis of chemically recuperated gas turbines , 2001 .

[12]  Sanjay,et al.  Thermodynamic modelling and simulation of advanced combined cycle for performance enhancement , 2008 .

[13]  Andreas Poullikkas,et al.  An overview of current and future sustainable gas turbine technologies , 2005 .

[14]  I Potts,et al.  Performance analysis of combined Brayton and inverse Brayton cycles and developed configurations , 2006 .

[15]  Antonio Peretto,et al.  A Feasibility Study of Inverted Brayton Cycle for Gas Turbine Repowering , 2005 .

[16]  Roberto Gabbrielli,et al.  Thermodynamic Performance Analysis of New Gas Turbine Combined Cycles With No Emissions of Carbon Dioxide , 2002 .

[17]  T. Heppenstall,et al.  Advanced gas turbine cycles for power generation: a critical review , 1998 .