碩士 / 國立成功大學 / 機械工程學系碩博士班 / 93 / The present study applies the finite difference method in conjunction with the least-squares scheme and the experimental temperature data to predict the average convection heat transfer coefficient and the fin efficiency on the rectangular vertical fin of one-tube plate finned-tube heat exchangers. The heat transfer coefficient on this rectangular fin is very non-uniform. Thus the whole plate fin is divided into several sub-fin regions in order to predict the average heat transfer coefficient and the fin efficiency on the fin from the knowledge of the experimental fin temperature. A plate finned-tube evaporator and some relative experimental equipments and set up in order to measure the fin temperature. The heat transfer coefficient can be predicted by using the present inverse scheme according to the temperature measurements on the fin. The results show that the heat transfer coefficient on the upstream region of the fin can be markedly higher than that on the downstream region in mixed convection. However, the average heat transfer coefficient will approach a fixed value under the free convection provided the fin spacing is larger than 0.002m. In order to evidence the accuracy of the present inverse scheme and the reliability of the some experimental formulas, a comparison of the average heat transfer coefficient between the present predicated results and the previous results in Heat Transfer Textbook is made.
| Identifer | oai:union.ndltd.org:TW/093NCKU5490072 |
| Date | January 2005 |
| Creators | Jui-Che Chou, 周睿晢 |
| Contributors | Han-Taw Chen, 陳寒濤 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 103 |
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