Category: Transient Plane Source
Author(s): Ane Ringseth
Keywords: Anisotropic TPS Measurements, density, Lexan, specific heat capacity, Stainless Steel 316L, Teflon, Thermal Conductivity, transient plane source method
Abstract: The potential of the transient plane source (TPS) technique for the testing of thermo-physical properties of hydrogen storage materials is evaluated. To do this, stacks of interleaved samples of stainless steel 316L, Teflon, and Lexan were tested for thermal conductivity using the anisotropic module in the TPS software. It was determined that the axial and radial thermal conductivities were as expected with the exception of the presence of some deviation in the measurements of Lexan. A program called 'Comsol Multiphysics' was used to simulate the temperature increase in the sensor. In the program, the contact resistance between the sensor and the material, and the two materials tested were adjusted until the temperature increase matched well with that determined experimentally. It was not possible to match the temperature increases exactly due to the input power being too high, and there were also some deviations that were thought to be due to poor cutting of the samples leading to imperfections along their edges. It was concluded that further work needed to be done before the TPS technique could be considered a good choice for the testing of hydrogen storage materials.
Reference: Master's Thesis, Norwegian University of Science and Technology, 2014.