期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 48, 期 21, 页码 7770-7793出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.11.130
关键词
Liquid hydrogen storage; Thermal properties; Cryogenics; Conduction; Radiation; Composite and porous materials
This work provides an accurate estimation of the effective thermal conductivity of insulation materials, such as powders, foams, fibrous materials, and multilayer systems. Experimental data and correlations are reviewed, and a first principles-based correlation is proposed to estimate the dependence of effective conductivity on various factors. The proposed correlation is validated using available experimental data and further improvements and testing are discussed.
An accurate estimation of the effective thermal conductivity of various insulation mate-rials is essential in the evaluation of heat leak and boil-off rate from liquid hydrogen storage tanks. In this work, we review the existing experimental data and various proposed correlations for predicting the effective conductivity of insulation systems consisting of powders, foams, fibrous materials, and multilayer systems. We also propose a first principles-based correlation that may be used to estimate the dependence of the effective conductivity as a function of temperature, interstitial gas composition, pressure, and structural properties of the material. We validate the proposed correlation using available experimental data for some common insulation materials. Further improvements and testing of the proposed correlation using laboratory scale data obtained using potential LH2 tank insulation materials are also discussed.(c) 2022 The Author(s). Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).
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