Effect of operating parameters on performance of an integrated biomass gasifier, solid oxide fuel cells and micro gas turbine system

Abstract An integrated power system of biomass gasification with solid oxide fuel cells (SOFC) and micro gas turbine has been investigated by thermodynamic model. A zero-dimensional electrochemical model of SOFC and one-dimensional chemical kinetics model of downdraft biomass gasifier have been developed to analyze overall performance of the power system. Effects of various parameters such as moisture content in biomass, equivalence ratio and mass flow rate of dry biomass on the overall performance of system have been studied by energy analysis. It is found that char in the biomass tends to be converted with decreasing of moisture content and increasing of equivalence ratio due to higher temperature in reduction zone of gasifier. Electric and combined heat and power efficiencies of the power system increase with decreasing of moisture content and increasing of equivalence ratio, the electrical efficiency of this system could reach a level of approximately 56%.Regarding entire conversion of char in gasifier and acceptable electrical efficiency above 45%, operating condition in this study is suggested to be in the range of moisture content less than 0.2, equivalence ratio more than 0.46 and mass flow rate of biomass less than 20  kg h −1 .

[1]  Fredrik Haglind,et al.  Thermodynamic analysis of an integrated gasification solid oxide fuel cell plant combined with an organic Rankine cycle , 2013 .

[2]  Liming Wei,et al.  Effects of gas recycle on performance of solid oxide fuel cell power systems , 2011 .

[3]  Andrés Melgar,et al.  Thermochemical equilibrium modelling of a gasifying process. , 2007 .

[4]  N. Bessette,et al.  A Mathematical Model of a Solid Oxide Fuel Cell , 1995 .

[5]  Ibrahim Dincer,et al.  A review on biomass‐based hydrogen production and potential applications , 2012 .

[6]  Paola Costamagna,et al.  Modeling of Solid Oxide Heat Exchanger Integrated Stacks and Simulation at High Fuel Utilization , 1998 .

[7]  S. A. Channiwala,et al.  Three zone equilibrium and kinetic free modeling of biomass gasifier - a novel approach. , 2009 .

[8]  A. Sharma,et al.  Equilibrium and kinetic modeling of char reduction reactions in a downdraft biomass gasifier: A comparison , 2008 .

[9]  Ibrahim Dincer,et al.  Exergy: Energy, Environment and Sustainable Development , 2007 .

[10]  Emmanuel Kakaras,et al.  High temperature solid oxide fuel cell integrated with novel allothermal biomass gasification: Part I: Modelling and feasibility study , 2006 .

[11]  Sudip Ghosh,et al.  Biomass integrated gasification fuel cell systems–Concept development and experimental results , 2011 .

[12]  D. F. Stewart,et al.  Computer simulation of a downdraft wood gasifier for tea drying , 2003 .

[13]  George E. Marnellos,et al.  From biomass to electricity through integrated gasification/SOFC system-optimization and energy balance , 2007 .

[14]  Kyriakos D. Panopoulos,et al.  Integrated CHP with autothermal biomass gasification and SOFC–MGT , 2008 .

[15]  Brian Elmegaard,et al.  Exergy analysis and optimization of a biomass gasification, solid oxide fuel cell and micro gas turbine hybrid system. , 2011 .

[16]  Stefano Cordiner,et al.  Biomass fueling of a SOFC by integrated gasifier: Study of the effect of operating conditions on system performance , 2013 .

[17]  Liming Wei,et al.  Performance comparison of three solid oxide fuel cell power systems , 2013 .

[18]  Hojat Ghassemi,et al.  Effects of various operational parameters on biomass gasification process; a modified equilibrium model , 2014 .

[19]  I. Dincer,et al.  Effect of gasification agent on the performance of solid oxide fuel cell and biomass gasification systems , 2010 .

[20]  N. Woudstra,et al.  Feasibility study of wood biomass gasification/molten carbonate fuel cell power system—comparative characterization of fuel cell and gas turbine systems , 2004 .

[21]  Stefano Cordiner,et al.  Analysis of a SOFC energy generation system fuelled with biomass reformate , 2007 .

[22]  Shinji Kimijima,et al.  Performance analysis of the SOFC–MGT hybrid system with gasified biomass fuel , 2007 .

[23]  Junxi Jia,et al.  A mathematical model of a tubular solid oxide fuel cell with specified combustion zone , 2007 .

[24]  Amitava Datta,et al.  Modelling of a downdraft biomass gasifier with finite rate kinetics in the reduction zone , 2009 .

[25]  François Maréchal,et al.  Synthesis and thermo-economic design optimization of wood-gasifier-SOFC systems for small scale applications , 2013 .

[26]  Shengqiang Shen,et al.  Effect of operation parameters on performance of tubular solid oxide fuel cell , 2008 .

[27]  K. N. Seetharamu,et al.  Prediction of performance of a downdraft gasifier using equilibrium modeling for different biomass materials , 2001 .

[28]  Don W. Green,et al.  Perry's chemical engineers' handbook. 7th ed. , 1997 .

[29]  F. Hamdullahpur,et al.  Modeling of an integrated two-stage biomass gasifier and solid oxide fuel cell system , 2012 .

[30]  C. Kinoshita,et al.  Kinetic model of biomass gasification , 1993 .