期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 164, 期 -, 页码 -出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2021.106898
关键词
Aerogel; Nonwovens; Finite element modeling (FEM); Thermal conductivity; Insulation
资金
- Ministry of Education, Youth and Sports of the Czech Republic
- European Union (European Structural and Investment Funds - Operational Program Research, Development and Education) [CZ.02.1.01/0.0/0.0/16_025/0007293]
- Internal grant agency of Faculty of Engineering, Czech University of Life Sciences Prague [2021:31140]
This study examined the thermal insulation properties of nonwoven samples embedded with silica aerogel using finite element simulations and experimental measurements. The results showed a high correlation between the FEM based simulations and experimental measurements, providing theoretical support for the use of aerogel blankets in house buildings at sub-zero temperatures.
In this study, the thermal insulation properties of nonwoven samples embedded with silica aerogel are examined. Finite element based simulations are performed using COMSOL Multiphysics and ANSYS software in order to predict the thermal performance of samples with different aerogel content. Comparison is made between samples with aerogel as insulating material with stagnant air as surrounding fluid in the fibrous material. Samples were developed with short polyethylene terephthalate (PET)-polypropylene (PP) fiber blended nonwovens. These materials were applied with aerogel granules so as to occupy 70%, 80% and 90% volume respectively. Computational predictions were made with COMSOL for both aerogel and air in similar proportions. Thermal insulation was predicted using ANSYS at 248 K?258 K temperature. Experimental measurements were also conducted at such temperatures. The results of FEM based simulation and experimental measurements showed very high correlation. The predictions can be used for theoretical determination of thermal performance in aerogel blankets used in house buildings at sub-zero temperatures.
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