A study on performance of solid oxide fuel cell-organic Rankine cycle combined system

Akkaya, Ali Volkan; Şahi̇n, Bahri̇

doi:10.1002/er.1490

Cited by 82 publications

(49 citation statements)

References 24 publications

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“…The fuel is a mixture of gases, which consists of any user-defined combination of CH 4 Based on the above consideration and assumptions, the model needs several input parameters by the user to specify the operating condition of the SOFC and input streams from the cycle. In AspenPlus TM , the SOFC appears as a User2 block, which is one of the general block types used to integrate user-created models with AspenPlus TM .…”

Section: Tmmentioning

confidence: 99%

Effects of operating and design parameters on the performance of a solid oxide fuel cell-gas turbine system

Suther

Fung

Köksal

et al. 2011

Int. J. Energy Res.

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SUMMARYWe present a steady-state thermodynamic model of a hybrid solid oxide fuel cell (SOFC)-gas turbine (GT) cycle developed using a commercial process simulation software, AspenPlus TM . The hybrid cycle model incorporates a zero-dimensional macro-level SOFC model. A parametric study was carried out using the developed model to study the effects of system pressure, SOFC operating temperature, turbine inlet temperature, steam-to-carbon ratio, SOFC fuel utilization factor, and GT isentropic efficiency on the specific work output and efficiency of a generic hybrid cycle with and without anode recirculation. The results show that system pressure and SOFC operating temperature increase the cycle efficiency regardless of the presence of anode recirculation. On the other hand, the specific work decreases with operating temperature. Overall, the model can successfully capture the complex performance trends observed in hybrid cycles.

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Section: Tmmentioning

confidence: 99%

Effects of operating and design parameters on the performance of a solid oxide fuel cell-gas turbine system

Suther

Fung

Köksal

et al. 2011

Int. J. Energy Res.

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“…The concentration overpotential can be calculated by [11]. Efficiency of SOFC (ηSOFC) is calculated by [2]:-…”

Section: Sofc Mode Of Operationmentioning

confidence: 99%

“…Roy et al [10] performed energetic and exergetic analyses of a biomass based SOFC-GT-ORC system. Akkaya et al [11] studied the performance of a combined system consisting of SOFC and ORC. This paper proposes a novel power generation cum storage system employing a RSOFC and PV/T module.…”

Section: Introductionmentioning

confidence: 99%

Reversible Solid Oxide Fuel Cell Connected to Solar PV/T System: Cell Electrochemical Modelling and Analysis

Mishra

Roy

Ghosh

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this paper, a novel power generation cum storage system employing reversible solid oxide fuel cell (RSOFC) has been proposed and modelled. The RSOFC is integrated with solar PV/T system. Here only the electrochemical modelling of the fuel cell unit has been presented and analysed thermodynamically. The RSOFC unit operates in steam electrolyser mode (during day time) as well as in fuel cell mode (during night time). The electrochemical model has been developed by using Engineering Equation Solver. Performance of RSOFC unit has been investigated under varying operating parameters viz. applied current density and operating cell temperature. For electrolyser mode of operation maximum efficiency is found to be 93% at a current density (J) 8000 A/m 2 and at cell temperature (Tcell) 1273K. Maximum efficiency during fuel cell mode of operation is found to be 77% at cell temperature 1073K and at current density 500 A/m 2 . IntroductionAccording to IEA report [1], fossil fuels contribute a major share of electricity production till now. Fossil based power plants are the major emitter of greenhouse gases. Therefore, designing advanced power generation system employing renewable energy sources is essential to neutralize greenhouse gas emissions. In that context, fuel cell technology has a potential to provide a clean and sustainable form of energy without emitting any polluting agents. Reversible solid oxide fuel cell (RSOFC) is a promising new technology which can operate in solid oxide fuel cell (SOFC) mode as well as in solid oxide steam electrolyser (SOSE) mode. RSOFC generally operates at a very high temperature (873-1273 K). Thus, it requires a high temperature heat source to preheat the incoming feed (H2 and air in SOFC mode of operation, H2O in SOSE mode of operation).Akikur et al.[2] proposed a solar powered RSOFC based cogeneration system. The overall efficiency of the system is found to be 20% and 23% in the solar-SOSE mode and the solar-SOFC mode respectively. Wendel et al. [3] studied the performance of an intermediate temperature RSOFC and found that efficiency, more than 70% can be achieved at intermediate stack temperature (680 0 C). Kazempoor et al. [4] proposed a RSOFC based energy storage system in which they investigated the effect of operating parameters viz. temperature, gas composition and fuel utilization on cell voltage, at varying current densities. Visitdumrongkul et al. [5] investigated the performance of SOSE integrated system for H2 production. The effect of operating parameters viz. oxygen to carbon ratio, operating

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“…At high operating temperatures, it can be assumed that chemical reactions in the fuel channel are at equilibrium [6,21,22]. Therefore, the total Gibbs free energy of the system, G t , as defined in Equation (12) where B m is the total number of atomic masses of the mth element in the system, a im is the number of atoms of the mth element present in each molecule of chemical species i.…”

Section: Sofc Modelmentioning

confidence: 99%

“…where E is the activation energy, a˜is an empirical preexponential coefficient, P Ã H 2 the partial pressure of hydrogen, P Ã H 2 O the partial pressure of water and P 0 is the reference pressure [14,21]. Concentration overpotential is a result of the change in concentration of the reactants at the surface of the electrodes as the fuel and oxidant diffuse through the porous electrodes.…”

Section: Sofc Modelmentioning

confidence: 99%

Performance analysis of a tubular solid oxide fuel cell with an indirect internal reformer

Hosseini

Jafarian

Karimi

2011

Int. J. Energy Res.

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SUMMARYA 2-D steady-state mathematical model of a tubular solid oxide fuel cell with indirect internal reforming (IIR-SOFC) has been developed to examine the chemical and electrochemical processes and the effect of different operating parameters on the cell performance. The conservation equations for energy, mass, momentum as well as the electrochemical equations are solved simultaneously employing numerical techniques. A co-flow configuration is considered for gas streams in the air and fuel channels. The heat radiation between the preheater and reformer surface is incorporated into the model and local heat transfer coefficients are determined throughout the channels. The model predictions have been compared with the data available in the literature. The model was used to study the effect of various operating conditions on the cell performance. Numerical results indicate that as the cell operating pressure increases, the reforming reaction extends to a larger portion of the cell and the maximum temperature move away from the cell inlet. As a result, a more uniform temperature prevails in the solid structure which reduces thermal stresses. Also, at higher excess air, the rate of heat transfer to the air stream is augmented and the average cell temperature is decreased.

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A study on performance of solid oxide fuel cell-organic Rankine cycle combined system

Cited by 82 publications

References 24 publications

Effects of operating and design parameters on the performance of a solid oxide fuel cell-gas turbine system

Effects of operating and design parameters on the performance of a solid oxide fuel cell-gas turbine system

Reversible Solid Oxide Fuel Cell Connected to Solar PV/T System: Cell Electrochemical Modelling and Analysis

Performance analysis of a tubular solid oxide fuel cell with an indirect internal reformer

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