Reconstruction of Intrinsic Thermal Parameters of Methane Hydrate and Thermal Contact Resistance by Freestanding 3$\omega$ Method
Jia Li, Zhao-Liang Wang** , Gui-Ce Yao
Energy and Power Department, China University of Petroleum (East China), Qingdao 266580
Abstract ：It is essential to obtain thermophysical properties of methane hydrate precisely with a freestanding probe for modeling and predicting thermal transport in gas hydrates. A method with a freestanding 3$\omega$ probe is presented to reconstruct the intrinsic thermal conductivity, thermal diffusivity, and thermal contact resistance of methane hydrate. Isolated from the thermal contact resistance, the intrinsic thermal conductivity of methane hydrate decreases between 250 K and 280 K and is 41% larger than the effective value at 253 K. More importantly, when the thermal contact resistance is isolated, the temperature dependence of intrinsic thermal conductivity shows a converse trend with the generally accepted glass-like feature at high temperature. Otherwise, thermal contact resistances measured in the experiment between the freestanding 3$\omega$ probe and the methane hydrate sample are extraordinary large. The freestanding 3$\omega$ method in this work is expected to measure the thermal property of methane hydrate more accurately.
收稿日期: 2018-04-09
出版日期: 2018-06-24
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2018, Vol. 35 
