Thermal and evaporative resistance measured in a vertically and a horizontally oriented air gap by Permetest skin model

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F21%3A00009575" target="_blank" >RIV/46747885:24410/21:00009575 - isvavai.cz</a>
Result on the web
<a href="http://www.revistaindustriatextila.ro/images/2021/2/08" target="_blank" >http://www.revistaindustriatextila.ro/images/2021/2/08</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.35530/IT.072.02.202038" target="_blank" >10.35530/IT.072.02.202038</a>

Result language
angličtina
Original language name
Thermal and evaporative resistance measured in a vertically and a horizontally oriented air gap by Permetest skin model
Original language description
This paper is a study of the correlation of the thermal resistance (Rct) and the evaporative resistance (Ret) in vertically and horizontally oriented air gaps by using the portable Permetest skin model. Experiments were done in a climatic chamber; an isothermal condition for Ret tests and non-isothermal condition for Rct tests. Foamed polyethylene air gap distance rings were prepared with a thickness of 2, 4 and 5 mm and their combinations to simulate the air gap distance from 0 to 16 mm which is more than the expected average gap in clothing systems. Test samples were woven fabric of 100 percent cotton, 100 percent polyester and their blends plus 100 percent of polypropylene, all have similar weight and structure. Results showed that with the increasing thickness of the air gap, Rct increased in a polynomial trend and Ret in a linear proportional rate up to 12 mm then started to change due to the effect of free convection and the different properties of materials. The surprising positive observation is that results from the horizontally and vertically oriented air gaps are very similar, and most of the results from the vertical air gap are slightly lower than the results from the horizontal air gap in all materials.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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