碩士 / 國立成功大學 / 機械工程學系 / 105 / This study applies inverse method and Icepak to determine the heat transfer and fluid flow characteristics of elliptical fin and tube exchanger with various fin spacing, flow velocity and various tube size. Since the distribution of the heat transfer coefficient on the fin is not uniform, the plate-fin is divided into several subregions and the heat transfer coefficient in each subregion is assumed to be unknown constant.Then using inverse method with measured temperature data to predict and analyze the average heat transfer coefficient on each subregion and then the whole region. The inverse method along with the finite difference method, least squares fitting method and experimental temperature data are applied to determine the heat transfer coefficient. Icepak is applied to get temperature, heat transfer and coefficient.
The results indicate that the average heat transfer coefficient increase with increasing fin spacing and flow velocity but will be close to a value when the fin spacing is infinite long. The results also show that the average heat transfer coefficient increases when tube size is large but the difference between two different tube size will decrease when flow velocity increases. In order to verify the reliability of the inverse method with predicted results of this paper, the present study also compares the empirical corelations of other relevant literature with CFD simulation packages.
| Identifer | oai:union.ndltd.org:TW/105NCKU5489082 |
| Date | January 2017 |
| Creators | Ping-ChouChen, 陳柄州 |
| 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 | 89 |
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