Highlighting of Critical Experimental Data for SOFC Modeling That is Missing From the Literature and Potential of N-IR Thermography for SOFC Study

Author(s):  
V. Lawlor

Within the following brief is the researched conclusion that there is a lack of fundamental experimental data available to the scientific community detailing the temperature profile through the cathode/electrolyte/anode assembly section of Solid Oxide Fuel Cells (SOFC). Within these electrochemical reaction driving deceives, heat may be generated and diminished by several means. For example, heat is generally considered to be generated locally; as a result of the reactor’s fundamental operation. Furthermore, heat is generally considered to be generated and/or diminished, depending on the reforming method used, when the anode executes hydrocarbon fuel reformation. Not continually developing and/or utilizing novel experimental techniques, often developed for other fields, in order to provide fundamentally elucidating experimental data regarding SOFC operation is counter-intuitive. To date, the high temperature fuel cell field has not fully adopted the potential of thermography in order to study SOFC internal operation and indeed material characterization. This may be caused by the recent rapid development of the technology, which has reduced its cost while increasing its scope. This technical brief aims to highlight missing experimental data and suggest a technology and approach that may be able to address the issue.

2020 ◽  
Vol 331 ◽  
pp. 135271 ◽  
Author(s):  
Manasa Kumar Rath ◽  
Alexey Kossenko ◽  
Alexander Kalashnikov ◽  
Michael Zinigrad

Author(s):  
Ghzzai Almutairi

AbstractIt is widely accepted that solid oxide fuel cells (SOFCs) represent a promising energy conversion approach that deliver a myriad of benefits including low environment pollution, high efficiency, and system compactness. This paper describes the construction of a basic model based on ohmic considerations, mass transfer, and kinetics that can effectively evaluate the performance of small button SOFCs. The analysis of the data indicates that there is a close alignment between the cell potential calculated using the model and previous experimental data. As such, it can be concluded that the model can be employed to optimize, evaluate, or control the design parameters within a SOFC system.


2021 ◽  
Vol 507 ◽  
pp. 230276
Author(s):  
Liyuan Fan ◽  
Anatoli Mokhov ◽  
S. Ali Saadabadi ◽  
Nigel Brandon ◽  
Purushothaman Vellayani Aravind

Author(s):  
Soumei Baba ◽  
Nariyoshi Kobayashi ◽  
Sanyo Takahashi ◽  
Satoshi Hirano

An anode gas recycle (AGR) system using an ejector for 1 kW solid oxide fuel cells (SOFCs) was developed to increase the electrical efficiency of combined power generation. We call this an AGR–SOFC. The effects of recirculation ratio, externally steam feed rate, and fuel utilization were determined experimentally on the AGR–SOFC performance (i.e., output power, stack temperature, and gas composition) using a variable flow ejector and a recirculation ratio of 0.55–0.62, overall fuel utilization of 0.720–84, and steam feed rate of 0–1.5 g/min. A quadrupole mass spectrometer was used to identify the recirculation ratio, the gas composition of reformed gas at the AGR–SOFC inlet, and that of the recycle gas at the outlet. Compared to one-path SOFC systems, i.e., without an AGR, the AGR–SOFC was stable and generated about 15 W more electricity when the overall fuel utilization was 0.84 and the recirculation ratio was 0.622 with no steam supply. This improved performance was due to the reduced H2O concentration in the anodic gas. In addition, although the recirculation ratio did not affect the AGR–SOFC performance, a high recirculation ratio can provide steam produced via the electrochemical reaction to the injected fuel for the steam reforming process.


2014 ◽  
Vol 775-776 ◽  
pp. 673-677
Author(s):  
Laurenia M. Pereira Garcia ◽  
Graziele L. Souza ◽  
Rubens M. Nascimento ◽  
Daniel A. Macedo ◽  
Fabiana V. Motta ◽  
...  

Lanthanum cobaltites doped with strontium and iron (La1-xSrxCo1-yFeyO3) have been intensively studied as cathode materials for solid oxide fuel cells (SOFC). In this work, powders of composition La0.6Sr0.4Co0.2Fe0.8O3 (LSCF6428) were synthesized by a combination of citrate and hydrothermal methods. As-prepared and calcined powders were investigated by different material characterization techniques. LSCF films were obtained on gadolinium doped ceria substrates (CGO) after sintering at 1200 °C. The effects of the sintering conditions on the microstructure and electrochemical performance of the electrodes were evaluated by scanning electron microscopy and impedance spectroscopy. The electrochemical characterization was assessed using a symmetrical cell configuration (LSCF/CGO/LSCF) at temperatures ranging from 650 to 800 °C. The area specific resistance showed strong relationship with microstructure. The best electrochemical behavior (0.18 ohm.cm2 at 800 °C) was obtained by using sintering dwell time of 2 h.


2020 ◽  
Vol 45 (53) ◽  
pp. 29407-29416
Author(s):  
Ting Tan ◽  
Mingxia Qin ◽  
Kang Li ◽  
Mingyang Zhou ◽  
Taikai Liu ◽  
...  

2020 ◽  
Vol 45 (41) ◽  
pp. 21464-21472
Author(s):  
Mingxia Qin ◽  
Ting Tan ◽  
Kang Li ◽  
Ziming Wang ◽  
Hongyu Yang ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document