碩士 / 國立中央大學 / 機械工程研究所 / 98 / An experimental investigation of natural convection heat transfer in nine vertical fins having the same frontal area is described. There are four types of fin which are flat plate fin, straight fin, offset strip fin and offset strip increase in length fin with different space, height and length of discrete plates.
Flat plate fin has highest heat transfer coefficient and smallest heat transfer rate in all fins. The chief geometric feature for effecting on heat transfer coefficient is fin space. Larger fin space leads to higher heat transfer coefficient. Heat transfer coefficient for 16 mm space of straight fin is better then 7 mm space by 79 ~ 114 %. Fin height effects on heat transfer coefficient insignificantly. Heat transfer coefficient for 15 mm height of straight fin is better then 7 mm space by 6 ~ 20 %. Length of discrete plates of offset strip fin effects on heat transfer coefficient insignificantly. In the same fin space, the heat transfer coefficient of offset strip fin is almost equal to the 7 mm space of straight fin.
| Identifer | oai:union.ndltd.org:TW/098NCU05489017 |
| Date | January 2010 |
| Creators | Guan-shian Li, 李冠賢 |
| Contributors | Chien-yuh Yang, 楊建裕 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 121 |
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