Effective Thermal Conductivity of Gas Diffusion Layers Used in PEMFC: Measured with Guarded-Hot-Plate Method and Predicted by a Fractal Model

2019 ◽  
Vol 33 (1) ◽  
pp. 1163-1176 ◽  
Author(s):  
Arjun Radhakrishnan ◽  
Zijie Lu ◽  
Satish G. Kandlikar
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Fractal Model ◽  
Gas Diffusion ◽  
Hot Plate ◽  
Plate Method ◽  
Gas Diffusion Layers ◽  
Guarded Hot Plate ◽  
Diffusion Layers

scholarly journals Evaluation of different measurements for effective thermal conductivity of fibrous materials

2014 ◽  
Vol 18 (5) ◽  
pp. 1712-1713
Author(s):  
Ming-Wei Tian ◽  
Li-Jun Qu ◽  
Shi-Feng Zhu ◽  
Xiao-Qing Guo ◽  
Ya-Ning Sun ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Intrinsic Factor ◽  
Woven Fabric ◽  
Fibrous Materials ◽  
Transient Method ◽  
Hot Plate ◽  
Plate Method ◽  
Guarded Hot Plate

Effective thermal conductivity is generally recognized as the intrinsic factor to reveal the thermal responses of fibrous materials. Here, two typical measurements, the step-wise transient method and the guarded hot plate method, were utilized to identify their feasibility for the effective thermal conductivity of fibrous materials (non-woven fabric and twill fabric) with different stacking layers.

Effect of PTFE on Thermal Conductivity of Gas Diffusion Layers of PEM Fuel Cells

2013 ◽  
Author(s):  
Hamidreza Sadeghifar ◽  
Ned Djilali ◽  
Majid Bahrami
Keyword(s):  
Experimental Data ◽  
Thermal Conductivity ◽  
Contact Resistance ◽  
Performance Modeling ◽  
Mechanistic Model ◽  
Pem Fuel Cells ◽  
Gas Diffusion ◽  
Gas Diffusion Layers ◽  
Diffusion Layers ◽  
First Time

Through-plane thermal conductivity of 14 SIGRACET gas diffusion layers (GDLs), including series 24 & 34, as well as 25 & 35, are measured under different compressive pressures, ranging from 2 to 14 bar, at the temperature of around 60 °C. The effect of compression, PTFE loadings, and micro porous layer (MPL) on thermal conductivity of the GDLs and their contact resistance with an iron clamping surface is experimentally investigated. The contact resistance of MPL coated on GDL with the substrate of that GDL is measured for the first time in this paper. A new robust mechanistic model is presented for predicting the through-plane thermal conductivity of GDLs treated with PTFE and is successfully verified with the present experimental data. The model can predict the experimentally-observed reduction in thermal conductivity as a result of PTFE treatment and provides detailed insights on performance modeling of PEMFCs.

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