A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity

Vadim I. Nikitsin , Abdrahman Alsabry , Valery A. Kofanov , Beata Backiel-Brzozowska , Paweł Truszkiewicz

Abstract

This paper proposes a method for determining an effective value of the thermal conductivity for moist, highly porous rigid polymer foams. The model of moist foam based on an ordered structure with interpenetrating components was developed in accordance with the moisture distribution in the pore space. With small moisture content, isolated water inclusions are formed, and the pore space is considered as a binary system (vapor-gas mixture and water) with isolated inclusions. With an increase in moisture content, isolated water inclusions merge, forming a continuous layer, and pore space is considered as a binary system of interpenetrating components. The thermal conductivity of the vapor-gas mixture is represented as the sum of the thermal conductivity of the dry gas and the thermal conductivity of the vapor caused by the diffusion transfer of vapor in the pore space, taking into account the coefficient of vapor diffusion resistance. Using the proposed scheme of calculation, a computational experiment was performed to establish the influence of the vapor diffusion, moisture content, and average temperature of the foam on its thermal conductivity.
Author Vadim I. Nikitsin
Vadim I. Nikitsin,,
-
, Abdrahman Alsabry
Abdrahman Alsabry ,,
-
, Valery A. Kofanov
Valery A. Kofanov,,
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, Beata Backiel-Brzozowska (FCEE / DCRE)
Beata Backiel-Brzozowska,,
- Department of Construction and Road Engineering
, Paweł Truszkiewicz
Paweł Truszkiewicz,,
-
Journal seriesEnergies, [ENERGIES], ISSN 1996-1073, (N/A 140 pkt)
Issue year2020
Vol13
No3
Pages1-11
Publication size in sheets0.5
Article number520
Keywords in Englishthermal conductivity; polymer foam; moisture diffusion; porous structure modeling
ASJC Classification1700 General Computer Science
DOIDOI:10.3390/en13030520
URL https://www.mdpi.com/1996-1073/13/3/520
Internal identifierROC 19-20
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 12-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.156; WoS Impact Factor: 2018 = 2.707 (2) - 2018=2.99 (5)
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