Experimental Analysis of Heat Transfer with Dropwise and Filmwise Condensation on Inclined Double Tubes Heat Exchanger
Dropwise condensation provides larger heat transfer coefficients compared to filmwise condensation, as discovered in the year 1930 by Schmid et al. Dropwise condensation can be described as a phenomenon of the incomplete wettability of a surface. The wettability of the surface is responsible for the...
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| Format: | Article |
| Language: | English |
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Unviversity of Technology- Iraq
2014-08-01
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| Series: | Engineering and Technology Journal |
| Subjects: | |
| Online Access: | https://etj.uotechnology.edu.iq/article_99901_919c7a8a9d6273cdc2a891575ff15106.pdf |
| _version_ | 1827358576069312512 |
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| author | Abdulhassan A. Karamallah Assim H. Yousif Ban M. Mohammed |
| author_facet | Abdulhassan A. Karamallah Assim H. Yousif Ban M. Mohammed |
| author_sort | Abdulhassan A. Karamallah |
| collection | DOAJ |
| description | Dropwise condensation provides larger heat transfer coefficients compared to filmwise condensation, as discovered in the year 1930 by Schmid et al. Dropwise condensation can be described as a phenomenon of the incomplete wettability of a surface. The wettability of the surface is responsible for the formation of the respective type of condensation and has a very strong effect on the performance of the heat transfer process. Likewise, the wettability of the surface has a very strong effect on the subcooling of the condensate, for constant cooling performance. Although the conditions necessary for promoting dropwise condensation are well known since several decades, and experiments with coatings as promoters have been carried out successfully, at least in part, the application of dropwise condensation is still today in a testing phase. The main problems in the realization of dropwise condensation are the insufficiency of the theoretical description of working boundary surface phenomena, such as complete or incomplete wettability and their strong dependence on influences caused in the practical operation by contamination, oxidation of the surface, adsorption layers, and gas enclosures. |
| first_indexed | 2024-03-08T06:13:59Z |
| format | Article |
| id | doaj.art-d90fc66afe5b4431b0677d8fefe15b5c |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T06:13:59Z |
| publishDate | 2014-08-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-d90fc66afe5b4431b0677d8fefe15b5c2024-02-04T17:31:10ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582014-08-013271640165410.30684/etj.32.7A.399901Experimental Analysis of Heat Transfer with Dropwise and Filmwise Condensation on Inclined Double Tubes Heat ExchangerAbdulhassan A. KaramallahAssim H. YousifBan M. MohammedDropwise condensation provides larger heat transfer coefficients compared to filmwise condensation, as discovered in the year 1930 by Schmid et al. Dropwise condensation can be described as a phenomenon of the incomplete wettability of a surface. The wettability of the surface is responsible for the formation of the respective type of condensation and has a very strong effect on the performance of the heat transfer process. Likewise, the wettability of the surface has a very strong effect on the subcooling of the condensate, for constant cooling performance. Although the conditions necessary for promoting dropwise condensation are well known since several decades, and experiments with coatings as promoters have been carried out successfully, at least in part, the application of dropwise condensation is still today in a testing phase. The main problems in the realization of dropwise condensation are the insufficiency of the theoretical description of working boundary surface phenomena, such as complete or incomplete wettability and their strong dependence on influences caused in the practical operation by contamination, oxidation of the surface, adsorption layers, and gas enclosures.https://etj.uotechnology.edu.iq/article_99901_919c7a8a9d6273cdc2a891575ff15106.pdfchromium coatingceramic coatingpolished surfacecondensationdropwisefilmwiseinclined surface |
| spellingShingle | Abdulhassan A. Karamallah Assim H. Yousif Ban M. Mohammed Experimental Analysis of Heat Transfer with Dropwise and Filmwise Condensation on Inclined Double Tubes Heat Exchanger Engineering and Technology Journal chromium coating ceramic coating polished surface condensation dropwise filmwise inclined surface |
| title | Experimental Analysis of Heat Transfer with Dropwise and Filmwise Condensation on Inclined Double Tubes Heat Exchanger |
| title_full | Experimental Analysis of Heat Transfer with Dropwise and Filmwise Condensation on Inclined Double Tubes Heat Exchanger |
| title_fullStr | Experimental Analysis of Heat Transfer with Dropwise and Filmwise Condensation on Inclined Double Tubes Heat Exchanger |
| title_full_unstemmed | Experimental Analysis of Heat Transfer with Dropwise and Filmwise Condensation on Inclined Double Tubes Heat Exchanger |
| title_short | Experimental Analysis of Heat Transfer with Dropwise and Filmwise Condensation on Inclined Double Tubes Heat Exchanger |
| title_sort | experimental analysis of heat transfer with dropwise and filmwise condensation on inclined double tubes heat exchanger |
| topic | chromium coating ceramic coating polished surface condensation dropwise filmwise inclined surface |
| url | https://etj.uotechnology.edu.iq/article_99901_919c7a8a9d6273cdc2a891575ff15106.pdf |
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