Influence of Interconnect-Channel Shape on Heat and Mass Transfer in Anode-Supported Planar Solid Oxide Fuel Cells

Author(s):  
Yogesh N. Magar ◽  
Raj M. Manglik ◽  
Milind A. Jog

The debate on inculcating effective design engineering learning – its fundamental conceptualization, application of theoretical constructs to model physical devices/systems, and development of tools for solving unstructured problems – and associated critical thinking has primarily focused on curricula issues. Little effort has been made to understand the cognitive underpinning of students that lends to success in this direction. This paper presents the findings of a transverse study to assess learning styles of undergraduate mechanical engineering students and their perceptions about design engineering. Survey results from a batch of sophomores and seniors are analyzed to ascertain: (i) aspects of learning styles that are conducive to design comprehension, and (ii) perceptions about design engineering that aid or impede such learning.

Author(s):  
Raj M. Manglik ◽  
Milind A. Jog ◽  
Yijun Liu

The debate on inculcating effective design engineering learning - its fundamental conceptualization, application of theoretical constructs to model physical devices/systems, and development of tools for solving unstructured problems - and associated critical thinking has primarily focused on curricula issues. Little effort has been made to understand the cognitive underpinning of students that lends to success in this direction. This paper presents the findings of a transverse study to assess learning styles of undergraduate mechanical engineering students and their perceptions about design engineering. Survey results from a batch of sophomores and seniors are analyzed to ascertain: (i) aspects of learning styles that are conducive to design comprehension, and (ii) perceptions about design engineering that aid or impede such learning.


Author(s):  
Pei Fu ◽  
Min Zeng ◽  
Qiuwang Wang

For anode-supported planar solid oxide fuel cells (SOFCs), the thick anode support layer (ASL) prevents the supply of fuel gas to the anode functional layer (AFL) where the electrochemical reactions take place. Shortage of the fuel gas at the active region results in concentration polarization. SOFC designs with porosity gradient anode may improve the cell performance. In order to investigate the effect of the porosity distributions on mass transfer characteristics of SOFC, a three dimensional half-cell model is developed based on the computational fluid dynamics (CFD) method. The numerical model solves continuity equation, conservation of momentum, multi-component mass transfer and electrochemical reaction. According to the numerical results, a SOFC design with a higher porosity gradient anode could effectively enhance mass transport of the fuel gas in the AFLs, which would lead to the reduction of polarization loss. It is also found that high porosity gradient among the anode layers could improve the H2 concentration gradient in the porous anode, which is beneficial to facilitate diffusion of the fuel gas in the porous anode. Concentration overpotentials of the SOFC decrease with the increase of the porosity gradient, especially for the low inlet H2 molar fraction. These findings indicate that the comprehensive performance of SOFC can be effectively improved by employing a high porosity gradient anode.


2015 ◽  
Vol 160 ◽  
pp. 954-964 ◽  
Author(s):  
Min Yan ◽  
Pei Fu ◽  
Xiang Li ◽  
Min Zeng ◽  
Qiuwang Wang

2010 ◽  
Vol 65 (5) ◽  
pp. 1668-1677 ◽  
Author(s):  
M. García-Camprubí ◽  
A. Sánchez-Insa ◽  
N. Fueyo

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