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Recommended Papers for: thermal contact resistance

Total Papers Found: 16

Measurement of through-plane effective thermal conductivity and contact resistance in PEM fuel cell diffusion media

A study of the through-plane thermal conductivity of various gas diffusion layer materials (GDL) and the thermal contact resistance between the GDL and an electrolytic iron surface as a function of compression load. These factors were anaylized with the intention of gaining knowledge about in-situ fuel cells. Thermal conductivity measurements were taken by a modified version of the guarded heat flux meter ...

Author(s): , ,

Direct measurement of through-plane thermal conductivity and contact resistance in fuel cell materials

The through-plane thermal conductivity of many components of a fuel cell, dry Nafion®, various diffusion medias and catalyst layers are studied. The thermal contact resistance between the diffusion media and a metal plate with respect to temperature and pressure was also determined. The measurements were made with a guarded heat flow meter device. The least accurate measurement was of the Toray carbon ...

Author(s): ,

Improving speed and precision of using guarded heat flow technique to measure thin specimens

This paper introduces a compensation algorithm and a different-layers calibration method that will improve the temperature measurement speed and thermal resistance elimination of a guarded heat flow meter instrument. Without these additions to the method, heat will travel through a thin slice of material too fast for thermal couples to measure accurately. Thermal contact resistance would cause inaccuracy with a thin slice ...

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Thermal conductivity of catalyst layer of polymer electrolyte membrane fuel cells: Part 1 – Experimental study

In this paper, a new method is proposed for measuring the through plane thermal conductivity of two catalyst layers of different thicknesses by the guarded heat flow meter (GHF) method, and the transient plane source method (TPS). These catalyst layers were made from two catalyst-coated substrates. The effects of pressing, and hot pressing the layers were also studied and shown to have ...

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Measurement Techniques for Thermal Conductivity and Interfacial Thermal Conductance of Bulk and Thin Film Materials

In this study, some of the most commonly used measurement techniques for thermal conductivity and interfacial contact resistance of bulk and thin film materials are analyzed. For thermal analysis of bulk materials, the laser flash diffusivity method, the steady-state absolute method, comparative technique, and transient plane source (TPS) method are most used. The absolute and comparative technique allow for large sample sizes to be measured, but requires the longest time ...

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