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Journal
2015 | 13 | 1 |
Article title

Numerical analysis of thermal stresses in a new design of microtubular stack

Content
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Languages of publication
EN
Abstracts
EN
Microtubular Solid Oxide Fuel Cells (mSOFCs)
are one of the most promising and efficient devices
that convert chemical energy of fuels into electrical
energy. However, mSOFC stacks work at high operating
temperature over 650°C, which leads to thermally
induced mechanical stresses and in consequence may
cause failure of stack components. In order to reduce the
local thermal gradients and prevent high stresses in the
stack components, it is desirable to study the effect of
stack design on its performance. For this purpose a 3D
numerical approach was developed to estimate thermal
expansion of fuel cell inside an mSOFC stack and to reduce
the associated experimental efforts and costs. Initially,
a Computational Fluid Dynamics (CFD) model was used
to calculate the temperature and species concentration
profiles. During the second modeling step temperature
profiles were used in the thermo-mechanical model to
calculate the thermal stress distribution in the mSOFC
stack. The results maximum thermal axial elongation
that equals 1.4 mm for the mSOFC stack. The modelled
maximum radial elongation was equal to 0.5 mm in the
contact areas of the cylindrical housing and manifolds on
the fuel inlet side.
EN
Publisher
Journal
Year
Volume
13
Issue
1
Physical description
Dates
received
6 - 11 - 2014
accepted
7 - 5 - 2015
online
7 - 7 - 2015
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.-psjd-doi-10_1515_chem-2015-0116
Identifiers
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