Energy and entropy study of a SOFC using biogas from different sources considering internal reforming of methane

Ramírez-Minguela, J.J.; Rangel-Hernández, V.H.; Alfaro-Ayala, J. Arturo; Uribe-Ramı́rez, A.R.; Mendoza-Miranda, Juan Manuel; Belman-Flores, J.M.; Ruiz-Camacho, B.

doi:10.1016/j.ijheatmasstransfer.2017.12.111

Cited by 21 publications

(8 citation statements)

References 32 publications

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“…However, the authors do not calculate the entropy production rate. The studies of A. Sciacovelly and V. Verda [31,32], as well as the recent studies of J. J. Ramírez-Minguela et al [33,34], deal with the 3D calculation of the entropy production rate in a SOFC. They only use empirical equations and do not conduct any validation.…”

Section: Introductionmentioning

confidence: 99%

Impact of Multi-Causal Transport Mechanisms in an Electrolyte Supported Planar SOFC with (ZrO2)x−1(Y2O3)x Electrolyte

Huerta¹,

Flasbart²,

Marquardt³

et al. 2018

Entropy

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The calculation of the entropy production rate within an operational high temperature solid oxide fuel cell (SOFC) is necessary to design and improve heating and cooling strategies. However, due to a lack of information, most of the studies are limited to empirical relations, which are not in line with the more general approach given by non-equilibrium thermodynamics (NET). The SOFC 1D-model presented in this study is based on non-equilibrium thermodynamics and we parameterize it with experimental data and data from molecular dynamics (MD). The validation of the model shows that it can effectively describe the behavior of a SOFC at 1300 K. Moreover, we show that the highest entropy production is present in the electrolyte and the catalyst layers, and that the Peltier heat transfer is considerable for the calculation of the heat flux in the electrolyte and cannot be neglected. To our knowledge, this is the first validated model of a SOFC based on non-equilibrium thermodynamics and this study can be extended to analyze SOFCs with other solid oxide electrolytes, with perovskites electrolytes or even other electrochemical systems like solid oxide electrolysis cells (SOECs).

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Section: Introductionmentioning

confidence: 99%

Impact of Multi-Causal Transport Mechanisms in an Electrolyte Supported Planar SOFC with (ZrO2)x−1(Y2O3)x Electrolyte

Huerta¹,

Flasbart²,

Marquardt³

et al. 2018

Entropy

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show abstract

“…An exergy increase of 6.7% was obtained in the spiral collector shape due to the addition of a larger heat absorption area compared to the straight collector. Ramírez‐Minguela et al [ 173 ] conducted an analysis of the new design by proposing three collector shapes: conventional, zigzag type A, and zigzag type B. The research revealed that the zigzag geometry with larger dimensions produces a higher outlet temperature and a greater entropy generation rate compared to the conventional geometry at all studied volumetric flow rates.…”

Section: Swh Specifications and Characteristicsmentioning

confidence: 99%

Review on the Progress of Solar Water Heaters and Their Future Perspectives

2023

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A solar water heater (SWH) converts solar radiation into thermal energy for various purposes, and its technology has experienced numerous developments. Many studies have focused on developing, optimizing, and analyzing the technological configurations of SWH to improve its thermal efficiency, but they rarely achieve 80% efficiency. This review aims to provide a broad overview of SWH, including the energetic and exergetic approaches and analyses, technological development, and examines advantages, disadvantages, and further developments. Various collectors of the SWH and related studies are also highlighted, and the results identify the technical and policy challenges of the implementation. Suggested potential solutions to these challenges are presented with further directions. Furthermore, this study also discusses the limitations of the current SWH technology by presenting the specifications and characteristics. It also presents the mathematical equation model often used, the technology potential, and the results of the latest studies and developments regarding SWH technology. The prospects for further development of the most promising SWH should be analyzed.

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“…The lumped mathematical model of SOFCs has been demonstrated in our previous paper (Ji et al, 2020). Fuel internal reforming occurs in the SOFC anode channel, which utilizes the water steam from the electrochemical reaction (Ramírez-Minguela et al, 2018) as Supplementary Equations S1, S2 in Supplementary materials Supplementary Table S1, which produces a mass of hydrogen. Hydrogen reacts with oxygen in the three-phase boundary (TPB) as Supplementary Equations S3.…”

Section: Fuel Cell Modelmentioning

confidence: 99%

Design and Performance of a Compact Air-Breathing Jet Hybrid-Electric Engine Coupled With Solid Oxide Fuel Cells

Qin

Cheng

et al. 2021

Front. Energy Res.

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A compact air-breathing jet hybrid-electric engine coupled with solid oxide fuel cells (SOFC) is proposed to develop the propulsion system with high power-weight ratios and specific thrust. The heat exchanger for preheating air is integrated with nozzles. Therefore, the exhaust in the nozzle expands during the heat exchange with compressed air. The nozzle inlet temperature is obviously improved. SOFCs can directly utilize the fuel of liquid natural gas after being heated. The performance parameters of the engine are acquired according to the built thermodynamic and mass models. The main conclusions are as follows. 1) The specific thrust of the engine is improved by 20.25% compared with that of the traditional jet engine. As pressure ratios rise, the specific thrust increases up to 1.7 kN/(kg·s−1). Meanwhile, the nozzle inlet temperature decreases. However, the temperature increases for the traditional combustion engine. 2) The power-weight ratio of the engine is superior to that of internal combustion engines and inferior to that of turbine engines when the power density of SOFC would be assumed to be that predicted for 2030. 3) The total pressure recovery coefficients of SOFCs, combustors, and preheaters have an obvious influence on the specific thrust of the engine, and the power-weight ratio of the engine is strongly affected by the power density of SOFCs.

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Energy and entropy study of a SOFC using biogas from different sources considering internal reforming of methane

Cited by 21 publications

References 32 publications

Impact of Multi-Causal Transport Mechanisms in an Electrolyte Supported Planar SOFC with (ZrO2)x−1(Y2O3)x Electrolyte

Impact of Multi-Causal Transport Mechanisms in an Electrolyte Supported Planar SOFC with (ZrO2)x−1(Y2O3)x Electrolyte

Review on the Progress of Solar Water Heaters and Their Future Perspectives

Design and Performance of a Compact Air-Breathing Jet Hybrid-Electric Engine Coupled With Solid Oxide Fuel Cells

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