Numerical Study on Heat and Mass Transfer of Evaporated Binary Zeotropic Mixtures in Porous Structure
This study investigates the heat and mass transfer characteristics of a binary mixture (R134a/R245fa) evaporated in a porous medium. The Eulerian model coupled with the multiphase VOF model and species transport equations is employed to establish a multi-component evaporation model. The effects of h...
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MDPI AG
2023-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/18/6526 |
| _version_ | 1797580411224719360 |
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| author | Bo Zhang Peilin Cui Zhiguo Wang Zhiwei Sun Bo Kong Wei Wang Wen Du Ping Huang Zhenhai Pan Zhenyu Liu |
| author_facet | Bo Zhang Peilin Cui Zhiguo Wang Zhiwei Sun Bo Kong Wei Wang Wen Du Ping Huang Zhenhai Pan Zhenyu Liu |
| author_sort | Bo Zhang |
| collection | DOAJ |
| description | This study investigates the heat and mass transfer characteristics of a binary mixture (R134a/R245fa) evaporated in a porous medium. The Eulerian model coupled with the multiphase VOF model and species transport equations is employed to establish a multi-component evaporation model. The effects of heat flux ranging from 200 kW/m<sup>2</sup> to 500 kW/m<sup>2</sup>, porosity ranging from 0.4 to 0.6, and mass fraction ratios (R134a/R245fa) of 3:7, 5:5, and 7:3 are explored. The results indicate that an increase in heat flux contributes to an increase in the evaporation rate. For the overall evaporation rate, the evaporation rates of R134a and R245fa improve by 11.3%, 6.9%, and 16.3%, respectively, while the maximum improvement in heat transfer coefficient is only 1.4%. The maximum evaporation rate is achieved at intermediate porosity in the porous medium, and the highest heat transfer coefficient is obtained at a porosity of 0.4. With the increase in mass fraction, the evaporation rate of the corresponding species also increases, while the overall evaporation rate and heat transfer coefficient remain almost unchanged. |
| first_indexed | 2024-03-10T22:49:37Z |
| format | Article |
| id | doaj.art-c654079ec01444eeb952c1fe7c067af2 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T22:49:37Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-c654079ec01444eeb952c1fe7c067af22023-11-19T10:26:26ZengMDPI AGEnergies1996-10732023-09-011618652610.3390/en16186526Numerical Study on Heat and Mass Transfer of Evaporated Binary Zeotropic Mixtures in Porous StructureBo Zhang0Peilin Cui1Zhiguo Wang2Zhiwei Sun3Bo Kong4Wei Wang5Wen Du6Ping Huang7Zhenhai Pan8Zhenyu Liu9Technology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha 410007, ChinaSchool of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaTechnology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha 410007, ChinaTechnology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha 410007, ChinaTechnology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha 410007, ChinaTechnology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha 410007, ChinaTechnology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha 410007, ChinaTechnology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha 410007, ChinaSchool of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaThis study investigates the heat and mass transfer characteristics of a binary mixture (R134a/R245fa) evaporated in a porous medium. The Eulerian model coupled with the multiphase VOF model and species transport equations is employed to establish a multi-component evaporation model. The effects of heat flux ranging from 200 kW/m<sup>2</sup> to 500 kW/m<sup>2</sup>, porosity ranging from 0.4 to 0.6, and mass fraction ratios (R134a/R245fa) of 3:7, 5:5, and 7:3 are explored. The results indicate that an increase in heat flux contributes to an increase in the evaporation rate. For the overall evaporation rate, the evaporation rates of R134a and R245fa improve by 11.3%, 6.9%, and 16.3%, respectively, while the maximum improvement in heat transfer coefficient is only 1.4%. The maximum evaporation rate is achieved at intermediate porosity in the porous medium, and the highest heat transfer coefficient is obtained at a porosity of 0.4. With the increase in mass fraction, the evaporation rate of the corresponding species also increases, while the overall evaporation rate and heat transfer coefficient remain almost unchanged.https://www.mdpi.com/1996-1073/16/18/6526binary zeotropic mixturespecies transportevaporation heat transferporous medium |
| spellingShingle | Bo Zhang Peilin Cui Zhiguo Wang Zhiwei Sun Bo Kong Wei Wang Wen Du Ping Huang Zhenhai Pan Zhenyu Liu Numerical Study on Heat and Mass Transfer of Evaporated Binary Zeotropic Mixtures in Porous Structure Energies binary zeotropic mixture species transport evaporation heat transfer porous medium |
| title | Numerical Study on Heat and Mass Transfer of Evaporated Binary Zeotropic Mixtures in Porous Structure |
| title_full | Numerical Study on Heat and Mass Transfer of Evaporated Binary Zeotropic Mixtures in Porous Structure |
| title_fullStr | Numerical Study on Heat and Mass Transfer of Evaporated Binary Zeotropic Mixtures in Porous Structure |
| title_full_unstemmed | Numerical Study on Heat and Mass Transfer of Evaporated Binary Zeotropic Mixtures in Porous Structure |
| title_short | Numerical Study on Heat and Mass Transfer of Evaporated Binary Zeotropic Mixtures in Porous Structure |
| title_sort | numerical study on heat and mass transfer of evaporated binary zeotropic mixtures in porous structure |
| topic | binary zeotropic mixture species transport evaporation heat transfer porous medium |
| url | https://www.mdpi.com/1996-1073/16/18/6526 |
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