Corrugated Multilayer Structures Ensuring Thermal Insulation in Extreme Climatic Conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F23%3A00011980" target="_blank" >RIV/46747885:24410/23:00011980 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.wec2023.com/" target="_blank" >https://www.wec2023.com/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Corrugated Multilayer Structures Ensuring Thermal Insulation in Extreme Climatic Conditions

Popis výsledku v původním jazyce

For extreme climatic conditions, it is important to provide clothing comfort as well as protection against cold and wind. This clothing must have very good thermal insulating properties and also be wind-proof to a great degree. However, thermal control and windproof clothing bring further difficulties due to the fact that presently designed ones accommodate the metabolic activities of human beings leading to the generation or loss of body heat. Thermal insulation depends critically on protecting structures‘ geometry and materials used but usually are not involving the energy of a natural heat generator, i.e., the human body. This lecture aims to develop and characterize advanced corrugated fibrous structures prepared by unique ROTIS technology enabling tune thickness and porosity due to corrugation. For ensuring the reflection of far infrared radiation produced by the human body, the composite nonwovens layer (Meftex) with deposition of copper nanoparticles is attached. By ROTIS technology, the three layers of structures composed of acrylic nonwoven web covering the inner Meftex layer are combined into the final structure. The developed structure is characterized by thermal insulation from conductive convective and radiative heat transfer modes. The hot plate system Alambeta and C-Therm thermal conductivity analyzer (TCi) are used to measure the basic thermal properties like thermal conductivity, resistance, and effusivity s at subzero temperatures. The distribution of velocity currents in a two-dimensional array in a flowing fluid is measured by particle image velocimetry (PIV) to study heat transfer by convection. The special tunnel simulating the total heat loss of textiles below freezing temperatures is used. The reduction of heat transport by the back reflection of far infrared radiation is observed using a homemade system with a thermo camera. A prediction system for thermal insulation efficiency is created.

Název v anglickém jazyce

Corrugated Multilayer Structures Ensuring Thermal Insulation in Extreme Climatic Conditions

Popis výsledku anglicky

For extreme climatic conditions, it is important to provide clothing comfort as well as protection against cold and wind. This clothing must have very good thermal insulating properties and also be wind-proof to a great degree. However, thermal control and windproof clothing bring further difficulties due to the fact that presently designed ones accommodate the metabolic activities of human beings leading to the generation or loss of body heat. Thermal insulation depends critically on protecting structures‘ geometry and materials used but usually are not involving the energy of a natural heat generator, i.e., the human body. This lecture aims to develop and characterize advanced corrugated fibrous structures prepared by unique ROTIS technology enabling tune thickness and porosity due to corrugation. For ensuring the reflection of far infrared radiation produced by the human body, the composite nonwovens layer (Meftex) with deposition of copper nanoparticles is attached. By ROTIS technology, the three layers of structures composed of acrylic nonwoven web covering the inner Meftex layer are combined into the final structure. The developed structure is characterized by thermal insulation from conductive convective and radiative heat transfer modes. The hot plate system Alambeta and C-Therm thermal conductivity analyzer (TCi) are used to measure the basic thermal properties like thermal conductivity, resistance, and effusivity s at subzero temperatures. The distribution of velocity currents in a two-dimensional array in a flowing fluid is measured by particle image velocimetry (PIV) to study heat transfer by convection. The special tunnel simulating the total heat loss of textiles below freezing temperatures is used. The reduction of heat transport by the back reflection of far infrared radiation is observed using a homemade system with a thermo camera. A prediction system for thermal insulation efficiency is created.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

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

Projekt

<a href="/cs/project/GM21-32510M" target="_blank" >GM21-32510M: Pokročilé struktury pro tepelnou izolaci v extrémních podmínkách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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