Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.]

Aerogelis characterized as a low density solid, low optical index of refraction, low thermal conductivity, and low speed of sound through materials, high surface area, and low dielectric constant. It has super-insulating characteristics and the heat transfer phenomenon associated with its complex na...

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Main Authors: Venkataraman, Mohanapriya, Militký, Jiří, Mishra, Rajesh, Jandová, Soňa
Format: Article
Language:English
Published: Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM) 2018
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Online Access:http://ir.uitm.edu.my/id/eprint/40401/1/40401.pdf
http://ir.uitm.edu.my/id/eprint/40401/
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Institution: Universiti Teknologi Mara
Language: English
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spelling my.uitm.ir.404012021-01-14T04:36:40Z http://ir.uitm.edu.my/id/eprint/40401/ Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.] Venkataraman, Mohanapriya Militký, Jiří Mishra, Rajesh Jandová, Soňa TJ Mechanical engineering and machinery Miscellaneous motors and engines.Including gas, gasoline, diesel engines Pneumatic machinery Aerogelis characterized as a low density solid, low optical index of refraction, low thermal conductivity, and low speed of sound through materials, high surface area, and low dielectric constant. It has super-insulating characteristics and the heat transfer phenomenon associated with its complex nanoporous structure. Overall, it delivers better thermal performance, improved durability, and faster installation times than the incumbent insulation materials. Due to these advantages, aerogel is used in many industries like manufacturing, oil & gas, automotive, textiles, construction etc., for steam distribution and thermal insulation application. Measurement of thermal properties of aerogel coated material is important to evaluate its usefulness under extreme weather condition. This study was focused on thermal insulation of aerogel coated high performance fibrous materials. Various measurement techniques for different combinations of insulation materials were studied. New methods were explored to measure thermal characteristics at extreme temperatures. Further, a few instruments were to be fabricated to measure and correlate thermal properties at sub-zero temperatures. This study was expected to assist in identifying the optimal thermal measurement technique and the insulation material most suitable for use. The results from the new measurement techniques like PIV and laboratory set-up instrument will be relevant for classification of materials and eventually for quality assessment of all type of insulation materials. Modeling and simulation were used to study the heat transfer through porous aerogel materials. The thermal resistances of samples were found to be directly proportional to its thickness. This may be attributed to decrease in heat losses due to space insulated by fibrous structure and nanoporous aerogel structure. The air permeability was found to be directly proportional to percentage of nanoporosity of the aerogel based fibrous structure. The fabric density and the aerogel present in the fabric have a significant effect on thermal properties of the overall structures. Compared to other materials, the aerogel-based samples were found to have considerably high thermal resistance even at extreme temperatures. Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM) 2018 Article PeerReviewed text en http://ir.uitm.edu.my/id/eprint/40401/1/40401.pdf Venkataraman, Mohanapriya and Militký, Jiří and Mishra, Rajesh and Jandová, Soňa (2018) Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.]. Journal of Mechanical Engineering (JMechE), SI 5 (5). pp. 62-96. ISSN 18235514
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic TJ Mechanical engineering and machinery
Miscellaneous motors and engines.Including gas, gasoline, diesel engines
Pneumatic machinery
spellingShingle TJ Mechanical engineering and machinery
Miscellaneous motors and engines.Including gas, gasoline, diesel engines
Pneumatic machinery
Venkataraman, Mohanapriya
Militký, Jiří
Mishra, Rajesh
Jandová, Soňa
Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.]
description Aerogelis characterized as a low density solid, low optical index of refraction, low thermal conductivity, and low speed of sound through materials, high surface area, and low dielectric constant. It has super-insulating characteristics and the heat transfer phenomenon associated with its complex nanoporous structure. Overall, it delivers better thermal performance, improved durability, and faster installation times than the incumbent insulation materials. Due to these advantages, aerogel is used in many industries like manufacturing, oil & gas, automotive, textiles, construction etc., for steam distribution and thermal insulation application. Measurement of thermal properties of aerogel coated material is important to evaluate its usefulness under extreme weather condition. This study was focused on thermal insulation of aerogel coated high performance fibrous materials. Various measurement techniques for different combinations of insulation materials were studied. New methods were explored to measure thermal characteristics at extreme temperatures. Further, a few instruments were to be fabricated to measure and correlate thermal properties at sub-zero temperatures. This study was expected to assist in identifying the optimal thermal measurement technique and the insulation material most suitable for use. The results from the new measurement techniques like PIV and laboratory set-up instrument will be relevant for classification of materials and eventually for quality assessment of all type of insulation materials. Modeling and simulation were used to study the heat transfer through porous aerogel materials. The thermal resistances of samples were found to be directly proportional to its thickness. This may be attributed to decrease in heat losses due to space insulated by fibrous structure and nanoporous aerogel structure. The air permeability was found to be directly proportional to percentage of nanoporosity of the aerogel based fibrous structure. The fabric density and the aerogel present in the fabric have a significant effect on thermal properties of the overall structures. Compared to other materials, the aerogel-based samples were found to have considerably high thermal resistance even at extreme temperatures.
format Article
author Venkataraman, Mohanapriya
Militký, Jiří
Mishra, Rajesh
Jandová, Soňa
author_facet Venkataraman, Mohanapriya
Militký, Jiří
Mishra, Rajesh
Jandová, Soňa
author_sort Venkataraman, Mohanapriya
title Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.]
title_short Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.]
title_full Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.]
title_fullStr Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.]
title_full_unstemmed Unconventional measurement methods and simulation of aerogel assisted thermoregulation / Mohanapriya Venkataraman ... [et al.]
title_sort unconventional measurement methods and simulation of aerogel assisted thermoregulation / mohanapriya venkataraman ... [et al.]
publisher Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM)
publishDate 2018
url http://ir.uitm.edu.my/id/eprint/40401/1/40401.pdf
http://ir.uitm.edu.my/id/eprint/40401/
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