Intensification of heat transfer between heat exchange surfaces at low RE values
This contribution deals with the heat transfer parameters and pressure losses in heat exchange sets with six geometrical arrangements at low Re values (Re from 476 to 2926). Geometrical arrangements were characterised by the h/H ratio ranging from 0.2 to 1.0. The experiments used the holographic int...
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Polish Academy of Sciences Committee of Chemical and Process Engineering
2015-09-01
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| Series: | Chemical and Process Engineering |
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| Online Access: | http://www.degruyter.com/view/j/cpe.2015.36.issue-3/cpe-2015-0023/cpe-2015-0023.xml?format=INT |
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| author | Cernecky Jozef Brodnianska Zuzana Koniar Jan |
| author_facet | Cernecky Jozef Brodnianska Zuzana Koniar Jan |
| author_sort | Cernecky Jozef |
| collection | DOAJ |
| description | This contribution deals with the heat transfer parameters and pressure losses in heat exchange sets with six geometrical arrangements at low Re values (Re from 476 to 2926). Geometrical arrangements were characterised by the h/H ratio ranging from 0.2 to 1.0. The experiments used the holographic interferometry method in real time. This method enables visible and quantitative evaluations of images of temperature fields in the examined heat exchange. These images are used to determine the local and mean heat transfer parameters. The obtained data were used to determine the Colburn j-factor and the friction coefficient f. The measured values show that by using the profiled heat exchange surfaces and inserting regulating tubes, an intensification of heat transfer (increase of Num, and/or j) was achieved. However, pressure losses recorded a significant increase (increase of f). |
| format | Article |
| id | doaj-art-48650846aa2d414aaea9773a0ef0ec7e |
| institution | DOAJ |
| issn | 2300-1925 |
| language | English |
| publishDate | 2015-09-01 |
| publisher | Polish Academy of Sciences Committee of Chemical and Process Engineering |
| record_format | Article |
| series | Chemical and Process Engineering |
| spelling | doaj-art-48650846aa2d414aaea9773a0ef0ec7e2025-08-20T03:10:01ZengPolish Academy of Sciences Committee of Chemical and Process EngineeringChemical and Process Engineering2300-19252015-09-0136333134410.1515/cpe-2015-0023cpe-2015-0023Intensification of heat transfer between heat exchange surfaces at low RE valuesCernecky Jozef0Brodnianska Zuzana1Koniar Jan2Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental and Technology, Studentska 26, 960 53 Zvolen, SlovakiaTechnical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental and Technology, Studentska 26, 960 53 Zvolen, SlovakiaTechnical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental and Technology, Studentska 26, 960 53 Zvolen, SlovakiaThis contribution deals with the heat transfer parameters and pressure losses in heat exchange sets with six geometrical arrangements at low Re values (Re from 476 to 2926). Geometrical arrangements were characterised by the h/H ratio ranging from 0.2 to 1.0. The experiments used the holographic interferometry method in real time. This method enables visible and quantitative evaluations of images of temperature fields in the examined heat exchange. These images are used to determine the local and mean heat transfer parameters. The obtained data were used to determine the Colburn j-factor and the friction coefficient f. The measured values show that by using the profiled heat exchange surfaces and inserting regulating tubes, an intensification of heat transfer (increase of Num, and/or j) was achieved. However, pressure losses recorded a significant increase (increase of f).http://www.degruyter.com/view/j/cpe.2015.36.issue-3/cpe-2015-0023/cpe-2015-0023.xml?format=INTheat transferheat exchange surfaceColburn j-factorinterferometry |
| spellingShingle | Cernecky Jozef Brodnianska Zuzana Koniar Jan Intensification of heat transfer between heat exchange surfaces at low RE values Chemical and Process Engineering heat transfer heat exchange surface Colburn j-factor interferometry |
| title | Intensification of heat transfer between heat exchange surfaces at low RE values |
| title_full | Intensification of heat transfer between heat exchange surfaces at low RE values |
| title_fullStr | Intensification of heat transfer between heat exchange surfaces at low RE values |
| title_full_unstemmed | Intensification of heat transfer between heat exchange surfaces at low RE values |
| title_short | Intensification of heat transfer between heat exchange surfaces at low RE values |
| title_sort | intensification of heat transfer between heat exchange surfaces at low re values |
| topic | heat transfer heat exchange surface Colburn j-factor interferometry |
| url | http://www.degruyter.com/view/j/cpe.2015.36.issue-3/cpe-2015-0023/cpe-2015-0023.xml?format=INT |
| work_keys_str_mv | AT cerneckyjozef intensificationofheattransferbetweenheatexchangesurfacesatlowrevalues AT brodnianskazuzana intensificationofheattransferbetweenheatexchangesurfacesatlowrevalues AT koniarjan intensificationofheattransferbetweenheatexchangesurfacesatlowrevalues |