The Use of a High Temperature Wind Tunnel for MT-SOFC Testing—Part II: Use of Computational Fluid Dynamics Software in Order to Study Previous MeasurementsSource: Journal of Fuel Cell Science and Technology:;2011:;volume( 008 ):;issue: 006::page 61019Author:V. Lawlor
,
C. Hochenauer
,
D. Meissner
,
A. G. Olabi
,
K. Klein
,
S. Cordiner
,
A. Mariani
,
S. Kuehn
,
S. Griesser
,
G. Zauner
,
G. Buchinger
DOI: 10.1115/1.4004507Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Micro-tubular solid oxide fuel cells (MT-SOFCs) are a much smaller version of larger tubular SOFCs. They are operational within seconds and allow a higher power density per volume than the larger version. Hence they are a potential technology for automotive, auxiliary and small scale power supply devices. In this study a commercially available computational fluid dynamic (CFD) software program was used to predict a MT-SOFCs performance when located inside a high temperature wind tunnel experimental apparatus. In Part I, experimentally measured temperature profiles were recorded via thermo-graphic analyses and I/V curves. These measurements were used in this study to establish the predictability and validity of the CFD code and furthermore understand the MT-SOFC attributes measured in Part I. A maximum 4% I/V curve deviation and 6 K temperature deviation between the experimentally measured and model predicted results was observed. Thus, the model predicted the MT-SOFCs performance in the experimental environment very accurately. A very critical observation was the current density and temperature profile across the MT-SOFC that was strongly dependent on the distance from the hydrogen/fuel inlet. Not only was the model validated but also a grid and quantitative solution analysis is explicitly shown and discussed. This resulted in the optimum grid density and the indication that a normally undesirable high grid aspect ratio is acceptable for similar MT-SOFC modeling. These initial simulations and grid/solution analysis are the prerequisite before performing a further study including multiple MT-SOFCs within a stack using different fuels is also envisaged.
keyword(s): Computational fluid dynamics , Solid oxide fuel cells , Temperature , Wind tunnels , Computer software , Fuels , Current density AND High temperature ,
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contributor author | V. Lawlor | |
contributor author | C. Hochenauer | |
contributor author | D. Meissner | |
contributor author | A. G. Olabi | |
contributor author | K. Klein | |
contributor author | S. Cordiner | |
contributor author | A. Mariani | |
contributor author | S. Kuehn | |
contributor author | S. Griesser | |
contributor author | G. Zauner | |
contributor author | G. Buchinger | |
date accessioned | 2017-05-09T00:44:32Z | |
date available | 2017-05-09T00:44:32Z | |
date copyright | December, 2011 | |
date issued | 2011 | |
identifier issn | 2381-6872 | |
identifier other | JFCSAU-28951#061019_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/146425 | |
description abstract | Micro-tubular solid oxide fuel cells (MT-SOFCs) are a much smaller version of larger tubular SOFCs. They are operational within seconds and allow a higher power density per volume than the larger version. Hence they are a potential technology for automotive, auxiliary and small scale power supply devices. In this study a commercially available computational fluid dynamic (CFD) software program was used to predict a MT-SOFCs performance when located inside a high temperature wind tunnel experimental apparatus. In Part I, experimentally measured temperature profiles were recorded via thermo-graphic analyses and I/V curves. These measurements were used in this study to establish the predictability and validity of the CFD code and furthermore understand the MT-SOFC attributes measured in Part I. A maximum 4% I/V curve deviation and 6 K temperature deviation between the experimentally measured and model predicted results was observed. Thus, the model predicted the MT-SOFCs performance in the experimental environment very accurately. A very critical observation was the current density and temperature profile across the MT-SOFC that was strongly dependent on the distance from the hydrogen/fuel inlet. Not only was the model validated but also a grid and quantitative solution analysis is explicitly shown and discussed. This resulted in the optimum grid density and the indication that a normally undesirable high grid aspect ratio is acceptable for similar MT-SOFC modeling. These initial simulations and grid/solution analysis are the prerequisite before performing a further study including multiple MT-SOFCs within a stack using different fuels is also envisaged. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | The Use of a High Temperature Wind Tunnel for MT-SOFC Testing—Part II: Use of Computational Fluid Dynamics Software in Order to Study Previous Measurements | |
type | Journal Paper | |
journal volume | 8 | |
journal issue | 6 | |
journal title | Journal of Fuel Cell Science and Technology | |
identifier doi | 10.1115/1.4004507 | |
journal fristpage | 61019 | |
identifier eissn | 2381-6910 | |
keywords | Computational fluid dynamics | |
keywords | Solid oxide fuel cells | |
keywords | Temperature | |
keywords | Wind tunnels | |
keywords | Computer software | |
keywords | Fuels | |
keywords | Current density AND High temperature | |
tree | Journal of Fuel Cell Science and Technology:;2011:;volume( 008 ):;issue: 006 | |
contenttype | Fulltext |