Advanced Fibrous Structures for Enhanced Thermal Insulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F23%3A00011978" target="_blank" >RIV/46747885:24410/23:00011978 - isvavai.cz</a>

Výsledek na webu

<a href="https://tbisociety.org/index.php?thispage=subpage&c=news&s=news&p=TBIS2023Report" target="_blank" >https://tbisociety.org/index.php?thispage=subpage&c=news&s=news&p=TBIS2023Report</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Advanced Fibrous Structures for Enhanced Thermal Insulation

Popis výsledku v původním jazyce

The climatic extreme is a challenge that humanity has constantly strived to manage. Textile materials scientists have endeavored to develop clothing that secures the human body from the effects of extreme cold climates while maintaining the comfort of the wearer. Temperature and wind are two major climatic components against which the human body requires protection from. The solution is to develop clothing that is wind-proof with good thermal insulation properties. The efficacy of such clothing is affected also by the physical activities of human beings leading to the generation or loss of metabolic body heat. Thermal insulation depends critically on protecting structures‘ thickness, and porosity, and partially on materials used but usually does not use the energy of natural heat generated by the human body. This lecture aims to develop and characterize advanced corrugated fibrous structures prepared using unique ROTIS technology, which enables us to control thickness and porosity due to corrugation. To ensure the reflection of far infrared radiation produced by the human body, the copper-coated composite nonwovens layer was sandwiched. By the ROTIS technology, the three layers of structures composed of polypropylene nonwoven web covering the inner copper-coated layer are combined into the final structure. The developed structure is characterized by thermal insulation from conductive, convective, and radiative heat transfer modes. Various techniques were used to measure thermal properties, like thermal conductivity, resistance, and effusivity at extreme cold temperatures. To study the heat transfer by convection, the distribution of velocity currents in a two-dimensional array in a flowing fluid was measured. The reduction of heat transport by the back reflection of far infrared radiation is observed using a custom-built system with a thermo-camera. A prediction system for thermal insulation efficiency was created. This research enhanced the thermal insulation through the advanced fibrous structures to protect humans from extreme cold climatic conditions.

Název v anglickém jazyce

Advanced Fibrous Structures for Enhanced Thermal Insulation

Popis výsledku anglicky

The climatic extreme is a challenge that humanity has constantly strived to manage. Textile materials scientists have endeavored to develop clothing that secures the human body from the effects of extreme cold climates while maintaining the comfort of the wearer. Temperature and wind are two major climatic components against which the human body requires protection from. The solution is to develop clothing that is wind-proof with good thermal insulation properties. The efficacy of such clothing is affected also by the physical activities of human beings leading to the generation or loss of metabolic body heat. Thermal insulation depends critically on protecting structures‘ thickness, and porosity, and partially on materials used but usually does not use the energy of natural heat generated by the human body. This lecture aims to develop and characterize advanced corrugated fibrous structures prepared using unique ROTIS technology, which enables us to control thickness and porosity due to corrugation. To ensure the reflection of far infrared radiation produced by the human body, the copper-coated composite nonwovens layer was sandwiched. By the ROTIS technology, the three layers of structures composed of polypropylene nonwoven web covering the inner copper-coated layer are combined into the final structure. The developed structure is characterized by thermal insulation from conductive, convective, and radiative heat transfer modes. Various techniques were used to measure thermal properties, like thermal conductivity, resistance, and effusivity at extreme cold temperatures. To study the heat transfer by convection, the distribution of velocity currents in a two-dimensional array in a flowing fluid was measured. The reduction of heat transport by the back reflection of far infrared radiation is observed using a custom-built system with a thermo-camera. A prediction system for thermal insulation efficiency was created. This research enhanced the thermal insulation through the advanced fibrous structures to protect humans from extreme cold climatic conditions.

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