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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

INDUSTRIA TEXTILA

ISSN

1222-5347

e-ISSN

—

Svazek periodika

72

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

RO - Rumunsko

Počet stran výsledku

7

Strana od-do

168-174

Kód UT WoS článku

000654100600008

EID výsledku v databázi Scopus

2-s2.0-85105657172