Energy Conversion Analysis of a Novel Solar Thermochemical System Coupled With Fuel Cells

Fossil fuels have been the main supply of power generation for use in manufacturing, transportation, residential and commercial sectors. However, environmentally adverse effects of fossil fuel conversion systems combined with pending shortage raise major concerns. As a promising approach to tackle these challenges, this paper presents a novel energy conversion system comprising of a solar thermal reactor coupled with hydrogen fuel cell and carbon fuel cell for electricity generation. The system uses concentrated solar energy for high temperature heat which upgrades the calorific value of the feedstock by 8%. The paper describes the components and characteristics of the proposed concept and models the energy flow of this system. A comparison based on unit mass feedstock supply is made with conventional Brayton cycles for electricity production. The results show that the extent of acetylene byproduct conversion in the solar reactor is of crucial importance to ensure competitiveness. Depending on the fuel cells efficiency and even more on the extent of byproduct formation, the results show that the overall chemical-to-electrical efficiency of this combined system ranges from 35 to 58%.Copyright © 2015 by ASME

[1]  Nesrin Ozalp,et al.  Calibrated models of on-site power and steam production in US manufacturing industries , 2006 .

[2]  Gilles Flamant,et al.  A pilot-scale solar reactor for the production of hydrogen and carbon black from methane splitting , 2010 .

[3]  R. Kobyłecki,et al.  The effect of fuel type on the performance of a direct carbon fuel cell with molten alkaline electrolyte , 2014 .

[4]  James Larminie,et al.  Fuel Cell Systems Explained , 2000 .

[5]  A. Kirubakaran,et al.  A review on fuel cell technologies and power electronic interface , 2009 .

[6]  Aldo Steinfeld,et al.  Kinetic investigation of the thermal decomposition of CH4 by direct irradiation of a vortex-flow laden with carbon particles , 2004 .

[7]  Nazim Muradov,et al.  Fossil hydrogen with reduced CO2 emission: Modeling thermocatalytic decomposition of methane in a fluidized bed of carbon particles , 2005 .

[8]  Gilles Flamant,et al.  Production of hydrogen by thermal methane splitting in a nozzle-type laboratory-scale solar reactor , 2005 .

[9]  S. Hoekman,et al.  Production of CO2‐free hydrogen from methane dissociation: A review , 2014 .

[10]  Omar Z. Sharaf,et al.  An overview of fuel cell technology: Fundamentals and applications , 2014 .

[11]  Aldo Steinfeld,et al.  Solar thermal cracking of methane in a particle-flow reactor for the co-production of hydrogen and carbon , 2009 .

[12]  Aldo Steinfeld,et al.  The solar thermal decarbonization of natural gas , 2001 .

[13]  Alan W. Weimer,et al.  Solar-thermal dissociation of methane in a fluid-wall aerosol flow reactor , 2004 .

[14]  Gilles Flamant,et al.  Co-production of hydrogen and carbon black from solar thermal methane splitting in a tubular reactor prototype , 2011 .

[15]  Alan W. Weimer,et al.  Intrinsic kinetics for rapid decomposition of methane in an aerosol flow reactor , 2002 .

[16]  Modeling of a Direct Carbon Fuel Cell System , 2005 .

[17]  M. Israeli,et al.  Production of hydrogen and carbon by solar thermal methane splitting. IV. Preliminary simulation of a confined tornado flow configuration by computational fluid dynamics , 2007 .

[18]  G. Cinti,et al.  Integration of direct carbon fuel cells with concentrated solar power , 2011 .

[19]  Anton Meier,et al.  Solar Fuels and Materials , 2004 .

[20]  Reg Adams.  World carbon black demand forecast to go on notching up 4% annual growth , 2006 .

[21]  G. Flamant,et al.  Characterisation of carbon blacks produced by solar thermal dissociation of methane , 2011 .

[22]  János M. Beér,et al.  High efficiency electric power generation: The environmental role , 2007 .

[23]  M. Epstein,et al.  Thermolysis of methane in a solar reactor for mass-production of hydrogen and carbon nano-materials , 2011 .

[24]  Nazim Muradov,et al.  Integration of direct carbon and hydrogen fuel cells for highly efficient power generation from hydrocarbon fuels , 2010 .