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Thermal Insulation and Porosity—From Macro- to Nanoscale

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Thermal Physics and Thermal Analysis

Part of the book series: Hot Topics in Thermal Analysis and Calorimetry ((HTTC,volume 11))

Abstract

Porosity of textiles is one of the main factors influencing their thermal conductivity and insulation. Porosity in textile fabrics is the combination of fiber porosity, yarn packing density, and voids due to fabric construction. It is shown that assemblies from very fine fibers tend to suppress radiation and convection heat transfers because of huge total surface area, which restricts the free flow of air passing through them. For effective thermal insulation especially at low temperatures, it should be selected sufficiently high thickness of textile layer as well. Porosity is therefore decisive parameter for the evaluation of thermal comfort expressed in special units “clo.” The main aim of this chapter is the prediction of the effect of porosity of fabrics and fibers on the thermal conductivity and insulation. The changes of thermal comfort due to the use of hollow fibers and multilayer corrugated nonwovens are described. The thermal properties of highly porous aerogel structures are discussed. Enhancement of insulation by their inclusion into textiles is investigated as well.

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Author information

Authors and Affiliations

  1. Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic

    Dana Křemenáková, Jiří Militký, Mohanapriya Venkataraman & Rajesh Mishra

  2. Department of Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India

    Mohanapriya Venkataraman

Authors
  1. Dana Křemenáková
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  2. Jiří Militký
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  3. Mohanapriya Venkataraman
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  4. Rajesh Mishra
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Corresponding author

Correspondence to Dana Křemenáková .

Editor information

Editors and Affiliations

  1. New Technologies (NTC-ZČU) Research Centre of the Westbohemian Region, University of West Bohemia, Plzeň, Czech Republic

    Jaroslav Šesták

  2. Division of Solid-State Physics, Czech Academy of Sciences, Institute of Physics, Praha , Czech Republic

    Pavel Hubík

  3. Division of Solid-State Physics, Czech Academy of Sciences, Institute of Physics, Praha, Czech Republic

    Jiří J. Mareš

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Křemenáková, D., Militký, J., Venkataraman, M., Mishra, R. (2017). Thermal Insulation and Porosity—From Macro- to Nanoscale. In: Šesták, J., Hubík, P., Mareš, J. (eds) Thermal Physics and Thermal Analysis. Hot Topics in Thermal Analysis and Calorimetry, vol 11. Springer, Cham. https://doi.org/10.1007/978-3-319-45899-1_20

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