A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity
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 spac...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/3/520 |
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| author | Vadzim I. Nikitsin Abdrahman Alsabry Valery A. Kofanov Beata Backiel-Brzozowska Paweł Truszkiewicz |
| author_facet | Vadzim I. Nikitsin Abdrahman Alsabry Valery A. Kofanov Beata Backiel-Brzozowska Paweł Truszkiewicz |
| author_sort | Vadzim I. Nikitsin |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-14T02:29:54Z |
| format | Article |
| id | doaj.art-59221474241246c4a9cafdd4410fa34d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T02:29:54Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-59221474241246c4a9cafdd4410fa34d2022-12-22T02:17:43ZengMDPI AGEnergies1996-10732020-01-0113352010.3390/en13030520en13030520A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal ConductivityVadzim I. Nikitsin0Abdrahman Alsabry1Valery A. Kofanov2Beata Backiel-Brzozowska3Paweł Truszkiewicz4Faculty of Technical Sciences, Pope John Paul II State School of Higher Education in Biala Podlaska, 21-500 Biała Podlaska, PolandFaculty of Civil Engineering, Architecture and Environmental Engineering, Institute of Civil Engineering, University of Zielona Gora, 65-417 Zielona Góra, PolandDepartment of Computer Science and Applied Mathematics, Brest State Technical University, 224017 Brest, BelarusFaculty of Civil Engineering and Environmental Sciences, Institute of Civil Engineering and Transport, Bialystok University of Technology, 15-351 Białystok, PolandDepartment of Foreign Languages, University of Zielona Gora, 65-417 Zielona Góra, PolandThis 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.https://www.mdpi.com/1996-1073/13/3/520thermal conductivitypolymer foammoisture diffusionporous structure modeling |
| spellingShingle | Vadzim I. Nikitsin Abdrahman Alsabry Valery A. Kofanov Beata Backiel-Brzozowska Paweł Truszkiewicz A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity Energies thermal conductivity polymer foam moisture diffusion porous structure modeling |
| title | A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity |
| title_full | A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity |
| title_fullStr | A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity |
| title_full_unstemmed | A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity |
| title_short | A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity |
| title_sort | model of moist polymer foam and a scheme for the calculation of its thermal conductivity |
| topic | thermal conductivity polymer foam moisture diffusion porous structure modeling |
| url | https://www.mdpi.com/1996-1073/13/3/520 |
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