An equivalent mechanical model investigating endplates deflection for PEM fuel cell stack

The aim of this study is to obtain the deflection curve equations of endplates with one to five clamping belts which allows investigating endplates deflection for uniform contact pressure distribution. Based on an equivalent mechanical model for a large fuel cell stack, the effects of the thicknesses of endplates, numbers, and positions of clamping belts are discussed, and the optimal thickness of endplate with different clamping belts is obtained, and moreover the optimal position of intermediate and outer clamping belts on the endplates. Finally, a three-dimensional finite element analysis (FEA) of a fuel cell stack clamping with steel belts and nonlinear contact elements is compared to what the equivalent mechanical beam model predicts. The result of this study shows that the equivalent mechanical model gives good prediction accuracy for the deflection behavior of endplates and the clamping force of the fuel cell stack, which is effective and helpful for the design of a large fuel cell stack assembly.

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An Equivalent Mechanical Model Investigating Endplates Deflection For a Large PEM Fuel Cell Stack

10.21203/rs.3.rs-134825/v1 ◽

2020 ◽

Author(s):

Zhiming Zhang ◽

Jun Zhang ◽

Yapeng Shang ◽

Tong Zhang

Keyword(s):

Fuel Cell ◽

Pressure Distribution ◽

Contact Pressure ◽

Mechanical Model ◽

Pem Fuel Cell ◽

Beam Model ◽

Contact Pressure Distribution ◽

Fuel Cell Stack ◽

Equivalent Mechanical Model ◽

Good Prediction Accuracy

Abstract The endplates are essential to assembly a large proton exchange membrane (PEM) fuel cell stack, whose deflection is negative to its uniform contact pressure distribution and large electrical contact resistance. The endplates with assembly clamping belts are proposed as an equivalent mechanical beam model consisting of elastic beam element with clamping forces. The deflection curve equations of endplates with 1 to 5 clamping belts are studied which allows investigating endplates deflection for uniform contact pressure distribution. Based on this equivalent mechanical model for fuel cell stack, the effects of the thicknesses of endplates, numbers and positions of clamping belts are discussed, and show the optimal thickness of endplate with different clamping belts, and moreover the optimal position of intermediate and outer clamping belts on the endplates. Finally, a three-dimensional finite element analysis (FEA) of a fuel cell stack clamping with steel belts and nonlinear contact elements is compared to what the equivalent mechanical beam model predicts. It is found that the presented model gives good prediction accuracy for the deflection behavior of endplates and the clamping force. Results showed that the equivalent mechanical modeling is effective and helpful for the design of a large fuel cell stack assembly.

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Three-Dimensional Simulation of Planar Solid Oxide Fuel Cell Stack

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes.128.459 ◽

2008 ◽

Vol 128 (2) ◽

pp. 459-466 ◽

Cited By ~ 1

Author(s):

Yoshitaka Inui ◽

Tadashi Tanaka ◽

Tomoyoshi Kanno

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Three Dimensional ◽

Solid Oxide ◽

Oxide Fuel ◽

Fuel Cell Stack ◽

Dimensional Simulation

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Simulation of Machining of Incoloy 907 Based on Thermodynamical Constitutive Equation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.631-632.681 ◽

2013 ◽

Vol 631-632 ◽

pp. 681-685

Author(s):

Fang Shao ◽

Fa Qing Li ◽

Hai Ying Zhang ◽

Xuan Gao

Keyword(s):

Cutting Force ◽

Cutting Temperature ◽

Tool Material ◽

High Reactivity ◽

Good Prediction ◽

Workpiece Material ◽

Element Analysis ◽

Good Prediction Accuracy ◽

Experimental Cutting ◽

Cutting Tool Materials

Aero-engine alloys (also as known as superalloys)are known as difficult-to-machine materials, especially at higher cutting speeds, due to their several inherent properties such as low thermal conductivity and their high reactivity with cutting tool materials. In this paper a finite element analysis (FEA) of machining for Incoloy907 is presented. In particular, the thermodynamical constitutitve equation(T-C-E) in FEA is applied for both workpiece material and tool material. Cutting temperature and cutting force are predicted. The comparison between the predicted and experimental cutting temperature and cutting force are presented and discussed. The results indicated that a good prediction accuracy of both principal cutting temperature and cutting force can be achieved by the method of FEA with thermodynamical constitutitve equation.

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Three-dimensional simulation of a new cooling strategy for proton exchange membrane fuel cell stack using a non-isothermal multiphase model

Applied Energy ◽

10.1016/j.apenergy.2019.113865 ◽

2019 ◽

Vol 255 ◽

pp. 113865 ◽

Cited By ~ 12

Author(s):

Guobin Zhang ◽

Hao Yuan ◽

Yun Wang ◽

Kui Jiao

Keyword(s):

Fuel Cell ◽

Proton Exchange Membrane ◽

Three Dimensional ◽

Proton Exchange ◽

Multiphase Model ◽

Fuel Cell Stack ◽

Cooling Strategy ◽

Dimensional Simulation ◽

Exchange Membrane

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Study on the aerodynamic noise of internal flow of regenerative flow compressors for a fuel-cell car

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406213500746 ◽

2013 ◽

Vol 228 (7) ◽

pp. 1155-1174 ◽

Cited By ~ 6

Author(s):

Qiang Kang ◽

Shuguang Zuo ◽

Kaijun Wei

Keyword(s):

Finite Element ◽

Fuel Cell ◽

Dynamic Model ◽

Fluid Dynamic ◽

Three Dimensional ◽

Internal Flow ◽

Aerodynamic Noise ◽

Noise Sources ◽

Element Analysis ◽

Regenerative Flow

The regenerative flow compressor used in fuel-cell cars generates high aerodynamic noise, which is the main source of noise. Compared with the research on centrifugal or axial turbomachinery, research on the noise of regenerative flow compressors is far from adequate. This paper presents the on-going work on it at Tongji University based on both experimental and computational works. In this study, a three-dimensional unsteady computational fluid dynamic model of the compressor was constructed with the large eddy approach. The pressure fluctuation, vortex noise source and Ffowcs William-Hawkings (FW-H) method were used to analyze the characteristics of the aerodynamic noise sources. Additionally, the far-field aerodynamic noise generated by the internal flow of the compressor was predicted using the aeroacoustic finite element method. The simulation results were validated with the experimental data. It was found that combining the fluid dynamic model and aeroacoustic finite element analysis promising results for aerodynamic noise prediction of compressors could be produced. The effects of the impeller parameters on the aerodynamic noise of the compressor were also studied.

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