Considering a clothing system consists of the human body, an air gap layer under the clothing as well as a fabric layer and boundary layer adjacent to the fabric, heat transfer from the skin to the environment is influenced by human body thermoregulation, the air gap, the fabric and environmental conditions. Based on Stolwijk’s 25-node thermoregulatory model, a new mathematical model was developed to include the sensible and latent heat transfer through the air gap, fabric layer and boundary layer adjacent to the fabric. To quantify the effect of the air gap on human body heat transfer, a 3D human body scanner was utilised to measure the air gap thickness of five experimental garments of increasing chest circumference. The model can be used to predict the apparent clothing temperature and heat loss from the human body when people are dressed in differently sized clothing.

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Model for Predicting the Effect of an Air Gap on the Heat Transfer of a Clothed Human Body

Research and development

Authors:

  • Zhang Zhao-Hua
    Fashion Institute, Dong Hua University, Shanghai, P. R. China
  • Zhang Zhao-Hua
    Textile Chemistry Department, Changzhou Textile Garment Institute, Changzhou, P. R. China
  • Wang Yun-yi
    Fashion Institute, Dong Hua University, Shanghai, P. R. China
  • Li Jun (j/w)
  • Li Jun
    Key Laboratory of Clothing, Design & Technology, Ministry of Education, Dong Hua University, Shanghai, P. R. China

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Abstract:

 Considering a clothing system consists of the human body, an air gap layer under the clothing as well as a fabric layer and boundary layer adjacent to the fabric, heat transfer from the skin to the environment is influenced by human body thermoregulation, the air gap, the fabric and environmental conditions. Based on Stolwijk’s 25-node thermoregulatory model, a new mathematical model was developed to include the sensible and latent heat transfer through the air gap, fabric layer and boundary layer adjacent to the fabric. To quantify the effect of the air gap on human body heat transfer, a 3D human body scanner was utilised to measure the air gap thickness of five experimental garments of increasing chest circumference. The model can be used to predict the apparent clothing temperature and heat loss from the human body when people are dressed in differently sized clothing.

Tags: 3D scanner, clothing temperature, heat loss, air gap.

Citation: Zhang Z.-H., Wang Y., Li J.; Model for Predicting the Effect of an Air Gap on the Heat Transfer of a Clothed Human Body. FIBRES & TEXTILES in Eastern Europe 2011, Vol. 19, No. 4 (87) pp. 105-110.

Published in issue no 4 (87) / 2011, pages 105–110.

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