Energy and exergy assessments of a novel trigeneration system based on a solid oxide fuel cell

Ranjbar, Faramarz; Chitsaz, Ata; Mahmoudi, S.M.S.; Khalilarya, Shahram; Rosen, Marc A.

doi:10.1016/j.enconman.2014.07.014

Cited by 182 publications

(50 citation statements)

References 28 publications

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“…The reason is because the energy analysis does not take into account irreversibilities generated into the SOFC stack, so it assumes that more useful energy is available. Another important implication of Figure 4 is that lowering current density increases both efficiencies as reported in literature [8], which is due largely to the reduction of voltage losses at lower current densities in accordance with literature [1].…”

Section: Application Of Exergysupporting

confidence: 86%

“…So cooling is available as second product. Furthermore, it is noteworthy to mention that the overall exergy efficiency is similar to other previous works [8,32]. Figure 6 shows the results of the calculated exergy efficiencies for both SOFC stack and cogeneration system as a function of the fuel utilization factor.…”

Section: Application Of Exergysupporting

confidence: 61%

“…Modeling of the electrochemical part can be as complicate as the study requires it, and most of the current literature provides basic models developed under the zero-dimensional assumption [6,8,25]. The main idea of such modeling is to have mathematical equations that mimic the connection between the chemical energy of the fuel and the electrical power.…”

Section: Electrochemical Modelmentioning

confidence: 99%

“…Furthermore, developments of hybrid systems are being expanded to run other power generation systems as trigeneration systems [8,9], steam turbines [10,11] and gasification [12]. In this context, a comparative energy and exergy analysis of an SOFC/GT waste heat to power conversion employing Kalina and Organic Rankine cycles is reported [13].…”

Section: Introductionmentioning

confidence: 99%

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Advanced Exergy Analysis of an Integrated SOFC-Adsorption Refrigeration Power System

Rangel-Hernández¹,

Niño-Avendaño²,

Ramírez-Minguela³

et al. 2018

Application of Exergy

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In this chapter, an exergy analysis applied to a solid oxide fuel cell (SOFC)/vapor adsorption refrigeration (VAR) system is presented. The influences of four significant parameters (current density, inlet fuel temperature, fuel utilization and steam-to-carbon ratio) on the exergy efficiency of both the SOFC stack and the SOFC-VAR system are investigated. In order to do so, a mathematical model is constructed in Engineering Equation Solver (EES) software to generate the simulations. The analysis shows that the calculated exergy efficiency is around 8% lower than the energy efficiency for both cases. Moreover, it is found that most of the causes of irreversibilities in the system are due to electronic and ionic conduction in the components. It is also shown that the exergy efficiency is substantially sensitive to fuel inlet temperature, which is evidenced by a bending-over behavior. Finally, in accordance with the calculated efficiency defects, the main exergy destructions are present in the heat exchangers, the SOFC, the afterburner and the generator.

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Section: Application Of Exergysupporting

confidence: 86%

Section: Application Of Exergysupporting

confidence: 61%

Section: Electrochemical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advanced Exergy Analysis of an Integrated SOFC-Adsorption Refrigeration Power System

Rangel-Hernández¹,

Niño-Avendaño²,

Ramírez-Minguela³

et al. 2018

Application of Exergy

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“…4 The effect of current density on the exergy efficiency at different porosity (top) and at different tortuosity (bottom) Fig. 5 The effect of anode diffusion polarization on the exergy efficiency at different porosity (top) and at different tortuosity (bottom) hydrogen molar fraction of 0.7 and current density of 810 mA/cm 2 , which is considered low-voltage drops compared to the activation and ohmic overpotential [32]. The increase of hydrogen flux at the anode side enhances the electrochemical reaction, which caused the current density to increase and which leads to an increase of the anode diffusion polarization.…”

Section: Effects Of Temperature and Pressurementioning

confidence: 99%

Exergy study on the effect of material parameters and operating conditions on the anode diffusion polarization of the SOFC

Zouhri

Lee

2016

Int J Energy Environ Eng

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In the presented work, a model is created in order to investigate the effect of different material parameters and operating conditions on the anode diffusion overpotential, which influence the exergy and energy efficiency of the solid oxide fuel cell (SOFC). In this research, it was demonstrated that the anode material parameters and operating conditions of the device components such as porosity, tortuosity, pore diameter, temperature, pressure and current density of the anode have various effects on the anode diffusion overpotential, which consequently affect the exergy and energy efficiency of the SOFC. The model has provided a strong direction on how to optimize the SOFC exergy and energy efficiency, by reducing the anode diffusion overpotential, which is affected by various material parameters and operating conditions.

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Exergoeconomic and environmental investigation of an innovative poly‐generation plant driven by a solid oxide fuel cell for production of electricity, cooling, desalinated water, and hydrogen

et al. 2020

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Fuel cell and renewable-based poly-generation plants (PGPs) are proven as advanced technologies for multiple generation purposes. To limit the greenhouse gas emissions, an innovative PGP generating electricity, cooling, desalinated water, and hydrogen is proposed in the current study. The system consists of a solid oxide fuel cell as a prime mover integrated with a gas turbine, a biomass combustion chamber, an organic Rankine cycle, an ejector refrigeration cycle, a desalination unit, and a proton exchange membrane electrolyzer integrated with solar collectors. As the most effective tools for performance evaluation, exergoeconomic, and environmental analyses have been applied. The system produces electricity of 4.4 MW, refrigeration capacity of 0.16 MW, and desalinated water of 0.96 kg/s. The attained freshwater enters the electrolyzer during 12 daylight hours, leading to hydrogen and sanitary water generation with the values of 1.55 g/s and 0.94 kg/s, respectively. The cost per unit exergy and the total cost rate of the products are 11.28 $/GJ, 223 $/h, correspondingly. Carbon dioxide emission of the system is estimated to be 10.79 kmol/MWh. According to the evaluation, the total cost rate increases with increasing current density and fuel cell inlet temperature and decreasing fuel utilization factor.

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Energy and exergy assessments of a novel trigeneration system based on a solid oxide fuel cell

Cited by 182 publications

References 28 publications

Advanced Exergy Analysis of an Integrated SOFC-Adsorption Refrigeration Power System

Advanced Exergy Analysis of an Integrated SOFC-Adsorption Refrigeration Power System

Exergy study on the effect of material parameters and operating conditions on the anode diffusion polarization of the SOFC

Exergoeconomic and environmental investigation of an innovative poly‐generation plant driven by a solid oxide fuel cell for production of electricity, cooling, desalinated water, and hydrogen

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