Title of Paper:基于TDTR技术水合物热导率测量方法

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Date of Publication:2019-01-01

Journal:化工学报

Volume:70

Issue:z2

Page Number:54-61

ISSN No.:0438-1157

Abstract:Tetrahydrofuran (THF) hydrate is a typical cage structure hydrate, and there are few reports on the thermal conductivity of THF, meanwhile, there are many problems such as the measurement sample is not a single phase and the hydrate is decomposed during the measurement process. In this paper, time domain thermal reflectance (TDTR) technique based on femtosecond pulse laser is employed to measure the thermal conductivity of tetrahydrofuran hydrate. According to the characteristic that the sample is fluid at room temperature, a temperature control platform which can be used for both sample preparation and TDTR measurement is designed to realize the non-contact in-situ measurement of THF thermal conductivity. The result of THF thermal conductivity is 0.6 W/(m?K), and interface thermal conductivity between Al and THF is 90.3 MW/(m2·K). The experimental results obtained in this paper have great significance on understanding the microcosmic heat conduction mechanism of solid hydrates and clarifying the coupling relationship between the water molecules cage and guest molecules.

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