Analysis of Non-Equilibrium and Equilibrium Models of Heat and Moisture Transfer in a Wet Porous Building Material
In the proposed paper, non-equilibrium and equilibrium models of heat and moisture transfer through wet building materials are presented and compared. In the former, the mass transfer between liquid and gaseous moisture results from the difference between the partial pressure of water vapor and its...
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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/1996-1073/13/1/214 |
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| author | Mirosław Seredyński Michał Wasik Piotr Łapka Piotr Furmański Łukasz Cieślikiewicz Karol Pietrak Michał Kubiś Tomasz S. Wiśniewski Maciej Jaworski |
| author_facet | Mirosław Seredyński Michał Wasik Piotr Łapka Piotr Furmański Łukasz Cieślikiewicz Karol Pietrak Michał Kubiś Tomasz S. Wiśniewski Maciej Jaworski |
| author_sort | Mirosław Seredyński |
| collection | DOAJ |
| description | In the proposed paper, non-equilibrium and equilibrium models of heat and moisture transfer through wet building materials are presented and compared. In the former, the mass transfer between liquid and gaseous moisture results from the difference between the partial pressure of water vapor and its saturation value. In the second model, the equilibrium between both phases is assumed. In the non-equilibrium model, liquid moisture can be in the continuous (funicular) or discontinuous (pendular) form. The transfer of moisture for each proposed model is tightly coupled with the energy transfer, which is assumed to be an equilibrium process. The time step and grid size sensitivity analysis of both numerical models are performed primarily. The verification of the model is based also on the numerical data available in literature. Finally, obtained with considered models, temporal variations of moisture content in three locations in the computational domain are compared. Reasonable conformity of results is reported, and discrepancies related to differences in formulations of models are discussed. |
| first_indexed | 2024-04-13T07:54:49Z |
| format | Article |
| id | doaj.art-67cb6ba4b7834f0d901ee12e92062c51 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T07:54:49Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-67cb6ba4b7834f0d901ee12e92062c512022-12-22T02:55:27ZengMDPI AGEnergies1996-10732020-01-0113121410.3390/en13010214en13010214Analysis of Non-Equilibrium and Equilibrium Models of Heat and Moisture Transfer in a Wet Porous Building MaterialMirosław Seredyński0Michał Wasik1Piotr Łapka2Piotr Furmański3Łukasz Cieślikiewicz4Karol Pietrak5Michał Kubiś6Tomasz S. Wiśniewski7Maciej Jaworski8Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandInstitute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandInstitute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandInstitute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandInstitute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandInstitute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandInstitute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandInstitute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandInstitute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warsaw, PolandIn the proposed paper, non-equilibrium and equilibrium models of heat and moisture transfer through wet building materials are presented and compared. In the former, the mass transfer between liquid and gaseous moisture results from the difference between the partial pressure of water vapor and its saturation value. In the second model, the equilibrium between both phases is assumed. In the non-equilibrium model, liquid moisture can be in the continuous (funicular) or discontinuous (pendular) form. The transfer of moisture for each proposed model is tightly coupled with the energy transfer, which is assumed to be an equilibrium process. The time step and grid size sensitivity analysis of both numerical models are performed primarily. The verification of the model is based also on the numerical data available in literature. Finally, obtained with considered models, temporal variations of moisture content in three locations in the computational domain are compared. Reasonable conformity of results is reported, and discrepancies related to differences in formulations of models are discussed.https://www.mdpi.com/1996-1073/13/1/214building materialdryingequilibrium modelheat and moisture transfernon-equilibrium modelnumerical modelingporous material |
| spellingShingle | Mirosław Seredyński Michał Wasik Piotr Łapka Piotr Furmański Łukasz Cieślikiewicz Karol Pietrak Michał Kubiś Tomasz S. Wiśniewski Maciej Jaworski Analysis of Non-Equilibrium and Equilibrium Models of Heat and Moisture Transfer in a Wet Porous Building Material Energies building material drying equilibrium model heat and moisture transfer non-equilibrium model numerical modeling porous material |
| title | Analysis of Non-Equilibrium and Equilibrium Models of Heat and Moisture Transfer in a Wet Porous Building Material |
| title_full | Analysis of Non-Equilibrium and Equilibrium Models of Heat and Moisture Transfer in a Wet Porous Building Material |
| title_fullStr | Analysis of Non-Equilibrium and Equilibrium Models of Heat and Moisture Transfer in a Wet Porous Building Material |
| title_full_unstemmed | Analysis of Non-Equilibrium and Equilibrium Models of Heat and Moisture Transfer in a Wet Porous Building Material |
| title_short | Analysis of Non-Equilibrium and Equilibrium Models of Heat and Moisture Transfer in a Wet Porous Building Material |
| title_sort | analysis of non equilibrium and equilibrium models of heat and moisture transfer in a wet porous building material |
| topic | building material drying equilibrium model heat and moisture transfer non-equilibrium model numerical modeling porous material |
| url | https://www.mdpi.com/1996-1073/13/1/214 |
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