Papers Category: Guarded Heat Flow Meter

Total Papers Found: 10

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

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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 ...

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Effect from a Variable U-Value in Adaptive Building Components with Controlled Internal Air Pressure

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In an environment that experiences drastically changing temperatures it is potentially more energy efficient to use insulative walls that can change their apparent thermal conductivities. This paper suggests a nano-porous ...

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Design, Assembly and Commisioning of a Test Apparatus for Characterizing Thermal Interface Materials

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Thermal interface materials (TIMs) are often used in electronic and microelectronic applications. It can be difficult to determine their characteristics once they are in-situ because it is hard to account ...

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Measurements of the Thermal Conductivity of Lithium Polymer Battery Composite Cathodes

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Thermal management is extremely important for large size batteries, however, inaccurate values have been used in the past for modeling. This paper investigates the thermal conductivity of the composite cathodes. ...

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

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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 ...

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

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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 ...

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Estimation of the thermal properties of hardened cement paste on the basis of guarded heat flow meter measurements

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A new analysis method based on the guarded heat flow meter apparatus is proposed to measure the thermal properties of cement-based pastes in a hydrated form. In a steady state, ...

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Intercomparison of Measurements of the Thermophysical Properties of Polymethyl Methacrylate

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The variability within the results presented from the guarded hot-plate (GHP) and guarded heat-flow meter (GHF) methods was determined. Multiple thermal properties of polymethyl methacrylate (PMMA) were analyzed to compare ...

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

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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, ...

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