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Thermal Conductivity Measurement of Gases by the Transient Short-Hot-Wire Method |
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| Authors: | S Moroe P L Woodfield J Fukai K Shinzato M Kohno M Fujii |
| Institution: | 1. Department of Mechanical Engineering , Kyushu University , Fukuoka, Japan;2. Research Center for Hydrogen Industrial Use and Storage, National Institute of Advanced Industrial Science and Technology , Fukuoka, Japan;3. Department of Chemical Engineering , Kyushu University , Fukuoka, Japan |
| Abstract: | Measurements of the thermal conductivity of helium and hydrogen are performed using the transient short-hot-wire method. The short hot wire is made of platinum and has a diameter of about 10 μm and a length of about 15 mm. It is attached by spot welding to platinum terminals with a diameter of 1.5 mm. The probe is inserted into the sample vessel that has a volume of 35 cm3 and an inner diameter of 30 mm. The thermal conductivity is evaluated by comparing a numerical solution of the heat conduction in and around the short wire with the experimentally obtained temperature rise of the wire. The measured thermal conductivities show good reproducibility. Also, the measured thermal conductivities agree with the reference equations within a deviation of ± 1%. |
| Keywords: | thermal conductivity measurement high thermal diffusivity gas transient short-hot-wire method curve fitting |