scholarly journals Design of a Forming Process for Increasing the Contact Length of Corrugated Plates in Molten Carbonate Fuel Cells

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1112
Author(s):  
Young-Seok Oh ◽  
In Yong Moon ◽  
Ho Won Lee ◽  
Se-Jong Kim ◽  
Jaimyun Jung ◽  
...  
Keyword(s):  
Gas Flow ◽  
Shear Fracture ◽  
Contact Length ◽  
Tool Design ◽  
Molten Carbonate Fuel Cell ◽  
Membrane Electrode ◽  
Molten Carbonate ◽  
Forming Process ◽  
Simulation Results ◽  
Corrugated Plates

In molten carbonate fuel cell (MCFC) systems, it is known that the shape of corrugated plates has a significant influence on performance, durability, and cost. A corrugated plate with a repeating open trapezoidal-shaped slot supports membrane electrode assembly and provides a gas flow channel. To increase the efficiency of the MCFC, the slot between the corrugated and center plates has a relatively large contact length. However, increasing the contact length of the slot increases the risk of necking or fracture generation at the corner of the slot. Therefore, we focus on the development of forming technology of corrugated plate which has large contact length of slots without any necking or fracture. To this end, numerical simulation was conducted to determine the appropriate process and tool design. In the simulation, to capture shear fracture during the forming process of slots, the normalized Cockroft–Latham ductile fracture model was used. The critical value for slitting and fracture was evaluated by comparing the deformed shapes in the slitting plane obtained from experimental and simulation results. Based on simulation results, a reasonable design concept of the two-stage forming process was suggested to increase the contact length of the slot without necking or fracture. In addition, the experiment results confirmed the validity of the proposed forming process and tool design.

Investigation Into Mechanical Behavior of the Current Collector for the Molten Carbonate Fuel Cell Through Finite Element Analysis Using Hexahedral Mesh Coarsening

2014 ◽  
Vol 11 (6) ◽  
Author(s):  
Chang-Whan Lee ◽  
Dong-Yol Yang ◽  
Jong-seung Park ◽  
Yun-sung Kim ◽  
Tae-Won Lee
Keyword(s):  
Fuel Cell ◽  
Mechanical Behavior ◽  
Current Collector ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Hexahedral Mesh ◽  
Forming Process ◽  
Simulation Results ◽  
Carbonate Fuel Cell ◽  
Mesh Coarsening

The current collector for the molten carbonate fuel cell (MCFC), which is a repeated structure of sheared protrusions, is manufactured from the three-stage forming process. For the precise and efficient simulation of the mechanical behavior of the current collector, the results of the forming process such as the deformed geometry and the distribution of plastic strain should be considered properly. In this work, an efficient method to construct the simulation model of the current collector considering the results of the forming process was introduced. First, hexahedral mesh coarsening was first conducted using the simulation results of the three-stage forming process of a sheared protrusion. Then, the equivalent plastic strain was mapped from the old mesh to the newly generated mesh. Finally, the simulation model for the current collector was constructed by duplicating and reflecting the newly generated mesh. For the verification of the proposed method, various numerical examples were investigated. The simulation results using the proposed method were compared with the experimental results of the three-point bending at 20 °C (room temperature) and 650 °C (operating temperature of the MCFC). From the examples for verification, it was found that the proposed simulation for the current collector was found to be efficient and applicable to the simulation of the mechanical behavior of the current collector for practical application.

scholarly journals Gas Flow Characteristics in a Molten Carbonate Fuel Cell.

1995 ◽  
Vol 61 (581) ◽  
pp. 150-156 ◽  
Author(s):  
Norifumi Ono ◽  
Ryoichiro Oshima ◽  
Hiroaki Koyano ◽  
Yoshitomo Sato ◽  
Sei Takashima
Keyword(s):  
Fuel Cell ◽  
Gas Flow ◽  
Flow Characteristics ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Carbonate Fuel Cell

Numerical analysis of the gas flow rate uniformity in the molten carbonate fuel cell (MCFC) under various conditions

2012 ◽  
Vol 26 (6) ◽  
pp. 1971-1978
Author(s):  
Junhyun Cho ◽  
Han-Sang Kim ◽  
Kyoungdoug Min ◽  
Jong Hoon Park ◽  
In Gab Chang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Numerical Analysis ◽  
Flow Rate ◽  
Gas Flow ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Gas Flow Rate ◽  
Carbonate Fuel Cell

scholarly journals Dynamic Simulation of Carbonate Fuel Cell-Gas Turbine Hybrid Systems

2006 ◽  
Vol 128 (2) ◽  
pp. 294-301 ◽  
Author(s):  
Rory A. Roberts ◽  
Jack Brouwer ◽  
Eric Liese ◽  
Randall S. Gemmen
Keyword(s):  
Fuel Cell ◽  
Gas Turbine ◽  
Dynamic Simulation ◽  
Fossil Fuels ◽  
Molten Carbonate Fuel Cell ◽  
Electricity Production ◽  
Molten Carbonate ◽  
Efficient Operation ◽  
Simulation Results ◽  
Carbonate Fuel Cell

Hybrid fuel cell/gas turbine systems provide an efficient means of producing electricity from fossil fuels with ultra low emissions. However, there are many significant challenges involved in integrating the fuel cell with the gas turbine and other components of this type of system. The fuel cell and the gas turbine must maintain efficient operation and electricity production while protecting equipment during perturbations that may occur when the system is connected to the utility grid or in stand-alone mode. This paper presents recent dynamic simulation results from two laboratories focused on developing tools to aid in the design and dynamic analyses of hybrid fuel cell systems. The simulation results present the response of a carbonate fuel cell/gas turbine, or molten carbonate fuel cell/gas turbine, (MCFC/GT) hybrid system to a load demand perturbation. Initial results suggest that creative control strategies will be needed to ensure a flexible system with wide turndown and robust dynamic operation.

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