A Comparative Analysis of Two Competing Mid-size Oxy-fuel Combustion Cycles

Conceptual turbine and compressor designs have been established for the semi-closed oxy-fuel combustion combined cycle and the Graz cycle. Real gas effects are addressed by extending cycle and conceptual design tools with a fluid thermodynamic and transport property database. Maximum compressor efficiencies are established by determining optimal values for stage loading, degree of reaction and number of compressor stages. Turbine designs are established based on estimates on achievable blade root stress levels and state of the art design parameters. The work indicates that a twin shaft geared compressor is needed to keep stage numbers to a feasible level. The Graz cycle is expected to be able to deliver around 3% net efficiency benefit over the semi-closed oxy-fuel combustion combined cycle at the expense of a more complex realization of the cycle.

[1]  Rodney John Allam,et al.  The Oxyfuel Baseline: Revamping Heaters and Boilers to Oxyfiring by Cryogenic Air Separation and Flue Gas Recycle , 2005 .

[2]  Herbert Jericha,et al.  Design Details of a 600 MW Graz Cycle Thermal Power Plant for CO2 Capture , 2008 .

[3]  Chakib Bouallou,et al.  Natural gas combined cycle power plant modified into an O2/CO2 cycle for CO2 capture , 2009 .

[4]  M. McLinden,et al.  NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 8.0 , 2007 .

[5]  Herbert Jericha,et al.  A FURTHER STEP TOWARDS A GRAZ CYCLE POWER PLANT FOR CO2 CAPTURE , 2005 .

[6]  Kristin Jordal Modeling and Performance of Gas Turbine Cycles with Various Means of Blade Cooling , 2001 .

[7]  Olav Bolland,et al.  A thermodynamic comparison of the oxy-fuel power cycles water-cycle, graz-cycle and matiant-cycle , 2001 .

[8]  Herbert Jericha,et al.  Qualitative and Quantitative Comparison of Two Promising Oxy-Fuel Power Cycles for CO2 Capture , 2008 .

[9]  Pericles Pilidis,et al.  A Semiclosed Cycle Gas Turbine With Carbon Dioxide-Argon as Working Fluid , 1996 .

[10]  Roger C. Reed,et al.  Oxidation of nickel-based single-crystal superalloys for industrial gas turbine applications , 2011 .

[11]  Erika de Visser,et al.  Capture of CO2 from medium-scale emission sources , 2009 .

[12]  S. L. Dixon,et al.  Fluid mechanics, thermodynamics of turbomachinery , 1966 .

[13]  Melvin J. Hartmann,et al.  A preliminary analysis of the magnitude of shock losses in transonic compressors , 1957 .

[14]  Herbert Jericha,et al.  Design Concept for Large Output Graz Cycle Gas Turbines , 2006 .

[15]  Paul Fletcher,et al.  Gas Turbine Performance , 1998 .

[16]  Jean-Pierre Tranier,et al.  Air separation, flue gas compression and purification units for oxy-coal combustion systems , 2009 .

[17]  Tomas Grönstedt,et al.  Conceptual Design of a Mid-Sized Semi-Closed Oxy-Fuel Combustion Combined Cycle , 2011 .

[18]  C. C. Koch,et al.  Stalling Pressure Rise Capability of Axial Flow Compressor Stages , 1981 .

[19]  Joachim Rösler,et al.  Design Considerations and Strengthening Mechanisms in Developing Co-Re-Based Alloys for Applications at + 100°C above Ni-Superalloys , 2011 .

[20]  Olav Bolland,et al.  Comparison of two CO2 removal options in combined cycle power plants , 1998 .

[21]  S. L. Dixon Fluid Mechanics and Thermodynamics of Turbomachinery Seventh Edition , 2013 .

[22]  N. Baines Axial and Radial Turbines , 2003 .

[23]  Olav Bolland,et al.  Characteristics of Cycle Components for CO 2 Capture , 2006 .

[24]  Saeed Farokhi,et al.  Axial-Flow Compressors: A Strategy for Aerodynamic Design and Analysis , 2003 .

[25]  Lei Xu Analysis and Evaluation of Innovative Aero Engine Core Concepts , 2011 .

[26]  Tomas Grönstedt,et al.  Conceptual Mean-Line Design of Single and Twin-Shaft Oxy-Fuel Gas Turbine in a Semi-Closed Oxy-Fuel Combustion Combined Cycle , 2012 .

[27]  G. Woollatt,et al.  Natural gas oxy-fuel cycles—Part 1: Conceptual aerodynamic design of turbo-machinery components , 2009 .