A novel louvered fin design to enhance thermal and drainage performances during periodic frosting/defrosting conditions
- Title
- A novel louvered fin design to enhance thermal and drainage performances during periodic frosting/defrosting conditions
- Author
- 이관수
- Keywords
- Frost formation; Defrosting; Water retention; Drainage; Louvered fin; Air source heat pump
- Issue Date
- 2016-02
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- ENERGY CONVERSION AND MANAGEMENT, v. 110, Page. 494-500
- Abstract
- The retention water on fin surface can significantly degrade the thermal performance of heat exchangers under periodic frosting/defrosting conditions, which also leads to a decrease in the energy efficiency of air-source heat pumps. A novel louvered fin design was suggested to improve the drainage and the thermal performance of heat exchanger. The novel louvered fin had an asymmetric louver arrangement by flattening two louvers on the leading edge. The retention water formed on fin surface markedly decreased the heat transfer rate of the conventional symmetric louvered fins in re-frosting cycles. On the other hand, the asymmetric louvered fins improved the drainage performance of the retention water, which enhanced the heat transfer rate. To identify the reason of the difference in drainage performance between two fin geometries, additional experiments were carried out with enlargement models. The improvement in drainage performance of the asymmetric fin design originated from the lowered surface tension between the fin surface and water droplet. (C) 2015 Elsevier Ltd. All rights reserved.
- URI
- http://www.sciencedirect.com/science/article/pii/S0196890415010481?via%3Dihubhttp://hdl.handle.net/20.500.11754/31932
- ISSN
- 0196-8904; 1879-2227
- DOI
- 10.1016/j.enconman.2015.11.028
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML