Critical review on the thermal conductivity modelling of silica aerogel composites

Abstract

As a new generation of thermal insulation materials, the effective thermal conductivity of aerogel and its composites is extremely low. The nanoporous structure of aerogels demobilises the movement of gas molecules, and the nano-skeleton system restricts solid heat transfer because of the size effect. Numerous research and modelling works have been carried out to understand and predict heat transfers. This review thoroughly discusses the existing theories and models of silica aerogel composites in gas, solid and radiative heat transfers. It investigates the correlation of the pore size distribution and solid skeleton network of the composites with the thermal conductivity. The review then assesses the advances of the development and questions remaining for further development, including 1) some unexplainable performance of existing models and 2) improvements required for gas and solid thermal conductivity models. Bridging the identified research gaps shall lead researchers to understand existing models better, develop a more accurate model based on more realistic microstructure simulation and further innovate the models for other emerging composites.

Publication DOI: https://doi.org/10.1016/j.jobe.2022.104814
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Civil Engineering
Funding Information: The project leading to this paper has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 869898 .
Additional Information: © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license 4.0 Funding Information: The project leading to this paper has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 869898 .
Uncontrolled Keywords: Aerogel composites,Heat transfer,Insulation,Modelling,Thermal conductivity,Civil and Structural Engineering,Architecture ,Building and Construction,Safety, Risk, Reliability and Quality,Mechanics of Materials
Publication ISSN: 2352-7102
Last Modified: 27 Mar 2024 08:20
Date Deposited: 14 Jul 2022 13:20
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.sci ... 8270?via%3Dihub (Publisher URL)
PURE Output Type: Review article
Published Date: 2022-10-01
Published Online Date: 2022-06-15
Accepted Date: 2022-06-11
Authors: Fu, Ziyan
Corker, Jorge
Papathanasiou, Theodosios (ORCID Profile 0000-0003-2130-5172)
Wang, Yuxuan
Zhou, Yonghui
Madyan, Omar Abo
Liao, Feiyu
Fan, Mizi

Download

[img]

Version: Published Version

License: Creative Commons Attribution

| Preview

Export / Share Citation


Statistics

Additional statistics for this record