Gas Flow Channel Structure and Power of an Anode-Supported Honeycomb Solid Oxide Fuel Cell
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An anode-supported honeycomb SOFC gives high volumetric power density and improve thermo-mechanical durability at high temperatures. We have so far fabricated and tested the honeycomb cell with a cathode layer of LSM and an electrolyte layer of 8YSZ on a porous anode honeycomb substrate of Ni/8YSZ. The anode-supported honeycomb cell exhibited promising volumetric power densities. In the present study, current-voltage and current-power density characteristics of the cells having different flow channel arrangement are measured under various inlet gas flow rates of fed hydrogen. We measure ohmic resistances of the honeycomb cells by current interrupt method, and indicate the impact of Ni re-oxidation resulting in high ohmic resistances. Fuel depletion in the cell causes Ni re-oxidation, and deteriorates the performance of the honeycomb cell.Keywords:
Ohmic contact
Honeycomb structure
Honeycomb
Power density
A finite element model is developed to investigate the detailed deformation behavior re-entrant honeycomb structures and quantify the energy absorbed by re-entrant honeycomb structures. The results obtained from the finite element model are compared with the results of an analytical model available in the literature to validate the finite element model. Numerical results revealed that the orientation of re-entrant honeycomb structures has a considerable effect on energy absorption. The re-entrant honeycomb structure with 90° alignment exhibits a better energy absorbing potential than other re-entrant honeycomb structures. This rather intriguing result is attributed to the number of cell walls alignment with the crushing direction.
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Honeycomb structure
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Shielding effect
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This paper presents the impact absorbing characteristics of aluminum honeycomb cell under axial impact loading. In order to clarify dynamic impact absorbing characteristics of honeycomb structure generally used as lightweight structure member, following facts were executed on enlarged hexagonal cell mode. For the purpose of the increasing of energy absorption quantity multi-layered cell model were performed dynamic test by dropped hammer impact test machine and FEM analysis about honeycomb increased of the multi-layered number and it changed the ratio of upper cell (h_U) and bottom cell's (h_B) height. As the result of experimental and analytical studies, the fundamental impact absorbing characteristics was able to confirmed multi-layered cell models honeycomb cell. And, 2layered honeycomb cell proved effectiveness that it is not retated to influence by shape or figure.
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In this paper a Design and analysis of honeycomb structures based upon its mechanical properties are going to studied and discussed. In aerospace industry and also in many other applications of sports the construction of sandwich honeycomb is used and developed from last few years. Here we introduced an Auxetic honeycomb structure and the study is based upon the Auxetic honeycomb structure over the conventional honeycomb structure. The honeycomb sandwich structures provide the benefits over conventional materials because of its properties like: very low weight, high stiffness, and durability and production cost savings. The finite element method (FEM) is applied for the determination of the elastic characteristics of the sandwich structure with Auxetic honeycomb core having three different sizes and with two different materials, in terms of constraints, loads and displacements. Finally the experimentation is carried out for the selected Auxetic honeycomb core.
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A simple method for thermal deformation analysis of a honeycomb sandwich construction (HSC), which is used as wall plates of buildings and mirror plates for parabolic antennas, was given. Orthotropic equivalent material properties are given theoretically by calculations with a periodical unit cell of honeycomb core. The theoretical thermal conductivities of the honeycomb core agreed with the value given by an experimental and computational hybrid system with thermal video system. A honeycomb model which has the theoretical material properties doesn't reduce the precision but significantly reduces the time for pre and post processes, and analyses.
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EVs are about 30% heavier on average than similar-sized engine vehicles due to the weight of their batteries. Therefore, it is crucial to reduce the weight of the components. In this paper, we focused on the impact energy absorption member, and the possibility to use the cylindrical honeycomb structure as an impact energy absorption member was investigated. First, an impact analysis of the cylindrical honeycomb was performed to compare the impact energy absorption performance with the box beam and the conventional tubular honeycomb structure. As a result, it was shown that the cylindrical honeycomb has a high impact on energy absorption performance. Next, the coating method of the cylindrical honeycomb core was investigated. It was shown that spray painting, which influences less environmental load, could be available to paint the cylindrical honeycomb core with complex geometry.
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Impact energy
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Poisson's ratio
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