Externally reformed solid oxide fuel cell–micro-gas turbine (SOFC–MGT) hybrid systems fueled by methanol and di-methyl-ether (DME)

Cocco, Daniele; Tola, Vittorio

doi:10.1016/j.energy.2008.09.013

Cited by 76 publications

(26 citation statements)

References 20 publications

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“…Finally, in this work the fuel and air compressors are modelled, which permits the calculation of the stack parasitic power requirement and the net AC efficiency. For comparison, Campanari [16] reports a voltage and current density of 690 mV and 180 mA/cm 2 (29) where P el,AC is the AC power (kW), nFuel in is the molar flow rate of input fuel (kmol/s), LHV fuel is the lower heating value of the input fuel (kJ/kmol) and P comp is the electrical power requirement of the fuel and air compressors (kW).…”

Section: Tablementioning

confidence: 99%

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Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus

Doherty¹,

Reynolds²,

Kennedy³

2010

Energy

185

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Received ABSTRACTThe operation and performance of a solid oxide fuel cell (SOFC) stack on biomass syn-gas from a biomass gasification combined heat and power (CHP) plant is investigated. The objective of this work is to develop a model of a biomass-SOFC system capable of predicting performance under diverse operating conditions. The tubular SOFC technology is selected. The SOFC stack model, equilibrium type based on Gibbs free energy minimisation, is developed using Aspen Plus. The model performs heat and mass balances and considers ohmic, activation and concentration losses for the voltage calculation. The model is validated against data available in the literature for operation on natural gas. Operating parameters are varied; parameters such as fuel utilisation factor (U f ), current density (j) and steam to carbon ratio (STCR) have significant influence. The results indicate that there must be a trade-off between voltage, efficiency and power with respect to j and the stack should be operated at low STCR and high U f . Operation on biomass syn-gas is compared to natural gas operation and as expected performance degrades.The realistic design operating conditions with regard to performance are identified. High efficiencies are predicted making these systems very attractive.

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Section: Tablementioning

confidence: 99%

“…This simulation package has been used for modelling fuel cell power generation systems in many studies [3,4,7,8,22,[28][29][30] …”

Section: Simulation Softwarementioning

confidence: 99%

Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus

Doherty¹,

Reynolds²,

Kennedy³

2010

Energy

185

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“…SOFCs produce excess heat that may thermally self sustain the stack, drive peripheral electricity generation devices or reformers or indeed, heat water. When a SOFC, or stack thereof, is combined with gas turbines, on the exhaust side, the overall system efficiency can be quite impressive [1][2][3][4][5][6][7]. This extra heat may also be provided to an external fuel reformer.…”

Section: Introductionmentioning

confidence: 99%

“…The electric field, mass species and energy transport, fluid flow, heat transfer and mass transfer in the manifolds and porous electrodes are considered, since electrochemical reaction terms for these phenomena are included in the electrochemical model. Furthermore since the electrochemical performance within the cell is coupled to the flow and temperature, the following standard conservation laws, Equations (2)(3)(4), are used in the model [40]: Where i is the species density, is the fluid velocity, t is the time, p is the pressure, μ is the viscosity, g is the gravitational constant, Q is the heat flux vector, and e is the total energy per unit mass, S m,i is the rate of species i production due to the electrochemical reactions, and S h is the volumetric heat source [41,42].…”

Section: Theory Behind the Numerical Calcula-tionmentioning

confidence: 99%

Scrutiny of MT-SOFC Stack Manifolding Design Using CFD

Lawlor¹,

Hochenauer

Mariani³

et al. 2012

TOFCJ

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Abstract:In this work we investigated the use of Computational Fluid Dynamics (CFD) in order to describe the behaviour of a single Micro Tubular Solid Oxide Fuel Cell (MT-SOFC) and a bundle thereof. It is the first step before building a rather necessarily complicated experimental apparatus in order to compare the predictions with experimental measurement. The first goal of this study was to test the suitability of commercially available CFD & SOFC modelling software, with some modified features. The second goal was to predict the effects of various fuel and oxidant manifolding techniques regarding temperature, species and current density distributions. A result of this paper showed that CFD is a very useful tool, when a SOFC module is incorporated for MT-SOFC stack modelling. A second result showed that the oxidant flow regime was much more important than the fuel regime in order to manipulate a single MT-SOFC's temperature profile. The cases investigated had a radiation model included and the differences in temperature profiles, when radiation was included and neglected, especially for MT-SOFCs with view factors to the reactor housing, was shown to be important. The CFD predictions clearly showed the benefits and advantages associated with the different forms of fuel and oxidant manifoldings. A future experimental analysis is currently being designed.

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“…In the reformer, hydrogen production is affected by the water content and reformer temperature [29]. Furthermore, a minimal amount of steam generation can lead to carbon formation, while excess steam generation can decrease SOFC performance due to decrease in SOFC temperature [30][31][32][33]. Thus, in our simulation, the steam to fuel ratio is fixed based on the simulation results.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Proton Conducting SOFC–Micro Gas Turbine Hybrid System with Anode and Cathode Recycling and Fueled by Ethanol

Sasmoko

Tseng

Wijayanti

2016

JRM

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Externally reformed solid oxide fuel cell–micro-gas turbine (SOFC–MGT) hybrid systems fueled by methanol and di-methyl-ether (DME)

Cited by 76 publications

References 20 publications

Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus

Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus

Scrutiny of MT-SOFC Stack Manifolding Design Using CFD

Analysis of Proton Conducting SOFC–Micro Gas Turbine Hybrid System with Anode and Cathode Recycling and Fueled by Ethanol

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