Optimal porosity of fibrous battings for thermal insulation

Jintu Fan; Ning Du; Huijun Wu

doi:10.1115/HT2007-32084

Optimal porosity of fibrous battings for thermal insulation

Jintu Fan, Ning Du, Huijun Wu

The Hong Kong Polytechnic University

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

Abstract

The porosity of fibrous porous materials is an important factor to the thermal insulating performance of the material. This paper considers both the optimal porosity of uniform fibrous battings and the optimal distribution of the porosity of non-uniform fibrous battings for thermal insulation. The former was determined by an approximate analytical solution and a numerical simulation by using Finite Volume Method, and the latter was studied by applying Simulated Annealing Method. The study showed that the optimal porosity of uniform fibrous porous materials is very much dependent on fiber emissivity, and fiber radius, but little influenced by the temperature difference of the boundaries. For non-uniform fibrous materials, there can be an optimal distribution of porosity, which can be predicted by applying the Simulated Annealing Method.

Original language	English
Title of host publication	2007 Proceedings of the ASME/JSME Thermal Engineering Summer Heat Transfer Conference - HT 2007
Pages	203-208
Number of pages	6
Volume	3
DOIs	https://doi.org/10.1115/HT2007-32084
Publication status	Published - 1 Dec 2007
Event	2007 ASME/JSME Thermal Engineering Summer Heat Transfer Conference, HT 2007 - Vancouver, BC, Canada Duration: 8 Jul 2007 → 12 Jul 2007

Conference

Conference	2007 ASME/JSME Thermal Engineering Summer Heat Transfer Conference, HT 2007
Country/Territory	Canada
City	Vancouver, BC
Period	8/07/07 → 12/07/07

ASJC Scopus subject areas

Electrical and Electronic Engineering
Mechanical Engineering
Condensed Matter Physics

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10.1115/HT2007-32084

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Optimal porosity of fibrous battings for thermal insulation

Abstract

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