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Influence of Air Velocity on the Total Thermal Insulation of Different Types of Clothing

Research and development

Author:

  • Młynarczyk Magdalena
    Laboratory of Thermal Load, Department of Ergonomics, Central Institute for Labour Protection - National Research Institute, Warsaw, Poland

Nr DOI: 10.5604/01.3001.0013.4470

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Abstract:

According to the standards describing research on the total and resultant thermal insulation, the requirements for the microclimate in which tests are performed must be recorded. However, these values are given with uncertainty. According to the EN ISO 15831 and EN 342 standards, air velocity should be set to (0.4 ± 0.1) m/s. For this reason, it is necessary to verify to what extent values exceeding the said range affect the results of the thermal insulation. Research was carried out for 3 sets of clothing differing in the number of layers of the material. The influence of air velocity on clothing thermal insulation was examined with three values of Va, : 0.4 m/s, 0.8 m/s and 1.2 m/s. Correction factors (CFs) were calculated and compared with the CF values set out in the EN ISO 9920 standard.

Tags:

thermal manikin, thermal parameters, air velocity, thermal insulation.

Citation:

Młynarczyk M. Influence of Air Velocity on the Total Thermal Insulation of Different Types of Clothing. FIBRES & TEXTILES in Eastern Europe 2019; 27, 6(138): 75-80 DOI: 10.5604/01.3001.0013.4470

Published in issue no 6 (138) / 2019, pages 75–80.

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