Energy-exergy analysis of an integrated small-scale LT-PEMFC based on steam methane reforming process

Wang, Zaixing; Mao, Junkui; He, Zhenzong; Liang, Fengli

doi:10.1016/j.enconman.2021.114685

Cited by 35 publications

(1 citation statement)

References 42 publications

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“…These maximum voltage and power density values were 1.02 V and 0.45 W/cm 2 , respectively [18]. Some studies in the literature have examined the energy and exergy analysis of SOFC under direct methane reforming [30,31]. These studies hold significant importance in understanding and optimizing the performance of SOFC during the methane-reforming process.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Kumuk,

Atak,

Dogan

et al. 2024

Energies

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This study examines the thermodynamic and numerical analyses of a methane-fed solid oxide fuel cell (SOFC) over a temperature range varying between 873 K and 1273 K. These analyses were conducted to investigate and compare the performance of the SOFC under various operating conditions in detail. As part of the thermodynamic analysis, important parameters such as cell voltage, power density, exergy destruction, entropy generation, thermal efficiency, and exergy efficiency were calculated. These calculations were used to conduct energy and exergy analyses of the cell. According to the findings, an increase in operating temperature led to a significant improvement in performance. At the initial conditions where the SOFC operated at a temperature of 1073 K and a current density of 9000 A/m2, it was observed that when the temperature increased by 200 K while keeping the current density constant, the power density increased by a factor of 1.90 compared to the initial state, and the thermal efficiency increased by a factor of 1.45. Under a constant current density, the voltage and power density values were 1.0081 V, 1.0543 V, 2337.13 W/m2, and 2554.72 W/m2 at operating temperatures of 1073 K and 1273 K, respectively. Under a current density of 4500 A/m2, the entropy generation in the cell was determined to be 29.48 kW/K at 973 K and 23.68 kW/K at 1173 K operating temperatures. The maximum exergy efficiency of the SOFC was calculated to be 41.67% at a working temperature of 1273 K and a current density of 1500 A/m2. This study is anticipated to be highly significant, as it examines the impact of temperature variation on exergy analysis in SOFC, validating both numerical and theoretical results, thus providing a crucial roadmap for determining optimized operating conditions.

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Section: Introductionmentioning

confidence: 99%

Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Kumuk,

Atak,

Dogan

et al. 2024

Energies

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Insight into Dynamic Characteristics of Concentrated Solar Power Systems with Calcium Looping Based on ZnO–Na₂SO₄ Co‐Doped CaO Composites

Wang,

Nie,

Chen

et al. 2024

Energy Tech

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Concentrated solar power (CSP) integrated with calcium looping (CaL) technology has garnered significant interest as a solution to mitigate the issue of intermittency in solar power production. However, the deactivation of CaO‐based materials during cycling limits the application of CaL technology on a large scale. Herein, the dynamic characteristics of the CSP‐CaL system indirectly integrated with the s–CO2 Brayton cycle using CaO–ZnO–Na2SO4 composites are studied. Energy analysis shows that the energy storage density varies from 1328.13 to 1232.03 J g−1, and its average value increases by 32.0%. Round‐trip efficiency of the system varies from 40.0% to 39.5%, and its average value increases by 22.6%. Exergy analysis shows that the co‐doping of ZnO and Na2SO4 into CaO enhances the exergy efficiency of the calciner and the heat exchange network, but reduces the exergy efficiency of the carbonator. Exergy round‐trip efficiency of the CSP‐CaL system has slightly decreased from 44.0% to 43.4%, with an average increase of 22.8%. Techno‐economic analysis shows that the levelized cost of electricity for different sizes of CSP‐CaL systems using CaO–ZnO–Na2SO4 ranges from 176.44 to 153.70 $ MWh−1. Therefore, the CaO–ZnO–Na2SO4 composite shows promising prospects for application in solar thermal power generation.

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Energy and Parameter Analysis of SOFC System for Hydrogen Production from Methane Steam Reforming

et al. 2022

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Energy-exergy analysis of an integrated small-scale LT-PEMFC based on steam methane reforming process

Cited by 35 publications

References 42 publications

Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Insight into Dynamic Characteristics of Concentrated Solar Power Systems with Calcium Looping Based on ZnO–Na₂SO₄ Co‐Doped CaO Composites

Energy and Parameter Analysis of SOFC System for Hydrogen Production from Methane Steam Reforming

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Energy-exergy analysis of an integrated small-scale LT-PEMFC based on steam methane reforming process

Cited by 35 publications

References 42 publications

Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Insight into Dynamic Characteristics of Concentrated Solar Power Systems with Calcium Looping Based on ZnO–Na2SO4 Co‐Doped CaO Composites

Energy and Parameter Analysis of SOFC System for Hydrogen Production from Methane Steam Reforming

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Insight into Dynamic Characteristics of Concentrated Solar Power Systems with Calcium Looping Based on ZnO–Na₂SO₄ Co‐Doped CaO Composites