Modeling the temperature distribution and performance of a PEM fuel cell with thermal contact resistance

2015 ◽  
Vol 87 ◽  
pp. 544-556 ◽  
Author(s):  
Tao-Feng Cao ◽  
Yu-Tong Mu ◽  
Jing Ding ◽  
Hong Lin ◽  
Ya-Ling He ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Temperature Distribution ◽  
Contact Resistance ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Pem Fuel Cell ◽  
And Performance

scholarly journals Effect of Compression on the Effective Thermal Conductivity and Thermal Contact Resistance in PEM Fuel Cell Gas Diffusion Layers

2010 ◽  
Author(s):  
Ehsan Sadeghi ◽  
Ned Djilali ◽  
Majid Bahrami
Keyword(s):  
Experimental Data ◽  
Thermal Conductivity ◽  
Fuel Cell ◽  
Contact Resistance ◽  
Effective Thermal Conductivity ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Pem Fuel Cell ◽  
Gas Diffusion ◽  
Analytical Models

Heat transfer through the gas diffusion layer (GDL) of a PEM fuel cell is a key process in the design and operation a PEM fuel cell. The analysis of this process requires determination of the effective thermal conductivity as well as the thermal contact resistance between the GDL and adjacent surfaces/layers. In the present study, a guarded-hot-plate apparatus has been designed and built to measure the effective thermal conductivity and thermal contact resistance in GDLs under vacuum and atmospheric pressure. Toray carbon papers with the porosity of 78% and different thicknesses are used in the experiments under a wide range of compressive loads. Moreover, novel analytical models are developed for the effective thermal conductivity and thermal contact resistance and compared against the present experimental data. Results show good agreements between the experimental data and the analytical models. It is observed that the thermal contact resistance is the dominant component of the total thermal resistance and neglecting this phenomenon may result in enormous errors.

Thermal Contact Resistance Measurements of Compressed PEFC Gas Diffusion Media

2016 ◽  
Vol 13 (4) ◽  
Author(s):  
Adam S. Hollinger ◽  
Stefan T. Thynell
Keyword(s):  
Fuel Cell ◽  
Contact Resistance ◽  
Pressure Range ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Gas Diffusion ◽  
Temperature Gradients ◽  
Polymer Electrolyte Fuel Cell ◽  
Carbon Paper ◽  
Carbon Cloth

Localized temperature gradients in a polymer electrolyte fuel cell (PEFC) are known to decrease the durability of the polymer membrane. The most important factor in controlling these temperature gradients is the thermal contact resistance at the interface of the gas diffusion layer (GDL) and the bipolar plate. Here, we present thermal contact resistance measurements of carbon paper and carbon cloth GDLs over a pressure range of 0.7–14.5 MPa. Contact resistances are highly dependent upon the clamping pressure applied to a fuel cell, and in the present work, contact resistances vary from 3.5 × 10−4 to 2.0 × 10−5 m2 K/W, decreasing nonlinearly over the pressure range for each material tested. The contact resistances of carbon cloth GDLs are two to four times higher than contact resistances of carbon paper GDLs throughout the range of pressures tested. The data presented here also show that the thermal resistance of the sample is negligible in comparison to the thermal contact resistance. Controlling temperature gradients in a fuel cell is desirable, and the measurements presented here can be used to more accurately predict temperature distribution in a polymer electrolyte fuel cell.

The Testing and Finite Element Analysis of Temperature Distribution and Thermal Deformation in Vertical Machining Center

2012 ◽  
Vol 538-541 ◽  
pp. 730-734
Author(s):  
Bing Fang ◽  
Lei Zhang ◽  
Jian Fu Zhang ◽  
Ya Hong Li
Keyword(s):  
Temperature Distribution ◽  
Contact Resistance ◽  
Thermal Deformation ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Measuring Method ◽  
Temperature Fields ◽  
Element Analysis ◽  
Fea Model ◽  
Machining Center

This paper presented a real-time measuring method of temperature fields and thermal deformations in vertical machining center. And a FEA model including the thermal contact resistance at interface for evaluating the temperature distribution and tools deformation in vertical machining center (VMC) was established. Compared with the experiment results, it is shown that the new model is much more accurate than the traditional model without considering thermal contact resistance at interface.

The effect of thermal contact resistance on the temperature distribution in a WC made cutting tool

2019 ◽  
Vol 45 (17) ◽  
pp. 22196-22202 ◽  
Author(s):  
Milad Sakkaki ◽  
Farhad Sadegh Moghanlou ◽  
Mohammad Vajdi ◽  
FatemehZahra Pishgar ◽  
Mohammadreza Shokouhimehr ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Contact Resistance ◽  
Thermal Contact Resistance ◽  
Cutting Tool ◽  
Thermal Contact

Thermal Contact Resistance Measurements of Gas Diffusion Layers in Polymer Electrolyte Fuel Cells

2015 ◽  
Author(s):  
Adam S. Hollinger ◽  
Stefan T. Thynell
Keyword(s):  
Fuel Cell ◽  
Contact Resistance ◽  
Polymer Electrolyte ◽  
Pressure Range ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cell ◽  
Gas Diffusion Layers ◽  
Diffusion Layers

Localized temperature gradients in a polymer electrolyte fuel cell are known to decrease the durability of the polymer membrane. The most important factor in controlling these temperature gradients is the thermal contact resistance at the interface of the gas diffusion layer and the bipolar plate. Here we present thermal contact resistance measurements of carbon paper and carbon cloth gas diffusion layers over a pressure range of 0.7–14.5 MPa. Contact resistances are highly dependent upon the clamping pressure applied to a fuel cell, and in the present work, contact resistances vary from 3.5E−4 to 2.0E−5 m2K/W, decreasing non-linearly over the pressure range for each material tested. The data presented here also shows that the thermal resistance of the sample is negligible in comparison to the thermal contact resistance. Thermal uniformity in a fuel cell is desirable, and the measurements presented here can be used to more accurately predict temperature distribution in a polymer electrolyte fuel cell.

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