Quantitative analysis of silica aerogel-based thermal insulation coatings

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A mathematical heat transfer model for a silica aerogel-based thermal insulation coating was developed. The model can estimate the thermal conductivity of a two-component (binder-aerogel) coating with potential binder intrusion into the nano-porous aerogel structure. The latter is modelled using a so-called core–shell structure representation. Data from several previous experimental investigations with silica aerogels in various binder matrices were used for model validation. For some relevant cases with binder intrusion, it was possible to obtain a very good agreement between simulations and experimental data with shell thickness and/or thermal conductivity of the shell as adjustable parameters. However, the experimental data was not sufficiently detailed to allow a separation of the effects of the two parameters. In the ideal case of no aerogel binder intrusion, a comparison with a coating containing intact hollow glass or polymer spheres showed that silica aerogel particles are more efficient in an insulation coating than hollow spheres. In a practical (non-ideal) comparison, the ranking most likely cannot be generalized. A parameter study demonstrates how the model can be used, qualitatively, to get an indication of the effect of important model parameters on the thermal conductivity of an insulation coating. With relevant data available for service life exposure conditions and raw material costs, the model can also be used as an optimization algorithm.
Original languageEnglish
JournalProgress in Organic Coatings
Volume89
Pages (from-to)26-34
ISSN0300-9440
DOIs
Publication statusPublished - 2015

Keywords

  • Insulation materials
  • Energy-saving
  • Thermal conductivity
  • Heat transfer
  • Thermal efficiency
  • Corrosion under isulation

Cite this

@article{7478471eeb654cc3b505ca1014ed4eba,
title = "Quantitative analysis of silica aerogel-based thermal insulation coatings",
abstract = "A mathematical heat transfer model for a silica aerogel-based thermal insulation coating was developed. The model can estimate the thermal conductivity of a two-component (binder-aerogel) coating with potential binder intrusion into the nano-porous aerogel structure. The latter is modelled using a so-called core–shell structure representation. Data from several previous experimental investigations with silica aerogels in various binder matrices were used for model validation. For some relevant cases with binder intrusion, it was possible to obtain a very good agreement between simulations and experimental data with shell thickness and/or thermal conductivity of the shell as adjustable parameters. However, the experimental data was not sufficiently detailed to allow a separation of the effects of the two parameters. In the ideal case of no aerogel binder intrusion, a comparison with a coating containing intact hollow glass or polymer spheres showed that silica aerogel particles are more efficient in an insulation coating than hollow spheres. In a practical (non-ideal) comparison, the ranking most likely cannot be generalized. A parameter study demonstrates how the model can be used, qualitatively, to get an indication of the effect of important model parameters on the thermal conductivity of an insulation coating. With relevant data available for service life exposure conditions and raw material costs, the model can also be used as an optimization algorithm.",
keywords = "Insulation materials, Energy-saving, Thermal conductivity, Heat transfer, Thermal efficiency, Corrosion under isulation",
author = "S{\o}ren Kiil",
year = "2015",
doi = "10.1016/j.porgcoat.2015.07.019",
language = "English",
volume = "89",
pages = "26--34",
journal = "Progress in Organic Coatings",
issn = "0300-9440",
publisher = "Elsevier",

}

Quantitative analysis of silica aerogel-based thermal insulation coatings. / Kiil, Søren.

In: Progress in Organic Coatings, Vol. 89, 2015, p. 26-34.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Quantitative analysis of silica aerogel-based thermal insulation coatings

AU - Kiil, Søren

PY - 2015

Y1 - 2015

N2 - A mathematical heat transfer model for a silica aerogel-based thermal insulation coating was developed. The model can estimate the thermal conductivity of a two-component (binder-aerogel) coating with potential binder intrusion into the nano-porous aerogel structure. The latter is modelled using a so-called core–shell structure representation. Data from several previous experimental investigations with silica aerogels in various binder matrices were used for model validation. For some relevant cases with binder intrusion, it was possible to obtain a very good agreement between simulations and experimental data with shell thickness and/or thermal conductivity of the shell as adjustable parameters. However, the experimental data was not sufficiently detailed to allow a separation of the effects of the two parameters. In the ideal case of no aerogel binder intrusion, a comparison with a coating containing intact hollow glass or polymer spheres showed that silica aerogel particles are more efficient in an insulation coating than hollow spheres. In a practical (non-ideal) comparison, the ranking most likely cannot be generalized. A parameter study demonstrates how the model can be used, qualitatively, to get an indication of the effect of important model parameters on the thermal conductivity of an insulation coating. With relevant data available for service life exposure conditions and raw material costs, the model can also be used as an optimization algorithm.

AB - A mathematical heat transfer model for a silica aerogel-based thermal insulation coating was developed. The model can estimate the thermal conductivity of a two-component (binder-aerogel) coating with potential binder intrusion into the nano-porous aerogel structure. The latter is modelled using a so-called core–shell structure representation. Data from several previous experimental investigations with silica aerogels in various binder matrices were used for model validation. For some relevant cases with binder intrusion, it was possible to obtain a very good agreement between simulations and experimental data with shell thickness and/or thermal conductivity of the shell as adjustable parameters. However, the experimental data was not sufficiently detailed to allow a separation of the effects of the two parameters. In the ideal case of no aerogel binder intrusion, a comparison with a coating containing intact hollow glass or polymer spheres showed that silica aerogel particles are more efficient in an insulation coating than hollow spheres. In a practical (non-ideal) comparison, the ranking most likely cannot be generalized. A parameter study demonstrates how the model can be used, qualitatively, to get an indication of the effect of important model parameters on the thermal conductivity of an insulation coating. With relevant data available for service life exposure conditions and raw material costs, the model can also be used as an optimization algorithm.

KW - Insulation materials

KW - Energy-saving

KW - Thermal conductivity

KW - Heat transfer

KW - Thermal efficiency

KW - Corrosion under isulation

U2 - 10.1016/j.porgcoat.2015.07.019

DO - 10.1016/j.porgcoat.2015.07.019

M3 - Journal article

VL - 89

SP - 26

EP - 34

JO - Progress in Organic Coatings

JF - Progress in Organic Coatings

SN - 0300-9440

ER -