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Recommended Papers for: TPS

Total Papers Found: 38

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 ...

Author(s): , , ,

The development of a microfabricated transient planar source (TPS) sensor for measuring thermal conductivity of nanofluids

The addition of thermally conductive nanoparticles to conventional heat transfer fluids enhances their performance so they can be used for high-powered applications. However, as nanoparticles are added, the liquid becomes more viscous, which decreases thermal conductivity. Changing the pH of the solution can control the clustering of nanoparticles to maintain and even enhance thermal conductivity. This study used the transient plane source (TPS) method to measure the thermal conductivity of ...

Author(s): , , , , ,

Thermal conductivity versus depth profiling of inhomogeneous materials

This research highlights the capabilities of transient measurements and sensors to estimate thermal conductivities of samples with large voids/variations in their compositions. Because of the lack of a physical model to predict thermal conductivity vs depth information of inhomogenous materials, researchers have utilized existing models to create an advanced iteration scheme, to determine depth position data. Although the authors have discovered a promising and reproducible means to determine the ...

Author(s): , , , ,

Thermal Characterization of Lauric–Stearic Acid/Expanded Graphite Eutectic Mixture as Phase Change Materials

Expanded graphite (EG) was added to lauric acid (LA)-stearic acid (SA) phase change materials to enhance their thermal conductivities. The PCMs were prepared in varying mass fractions of LA and SA, and 10 wt. % of EG was added. The phase change temperature and phase change enthalpy were determined by DSC, while the thermal conductivities, and thermal stabilities of the PCMs were determined by the transient plane source and thermogravimetric analysis, ...

Author(s): , , ,

Effective thermal conductivity and diffusivity of GeSeSb glasses measured simultaneously as a function of temperature and fit to empirical equations

The effective thermal conductivity and thermal diffusivity was measured for chalcogenide glass samples of the formulation Ge30-xSe70Sbx (x = 10, 15, 20, 25). It was found that both the effective thermal conductivity and thermal diffusivity were independent of temperature up to 160º C. After this point, both properties were found to increase with increasing temperature until they reached a maximum value at a point near the glass transition temperature of the glass. After reaching ...

Author(s): , , , , ,