碩士 / 國立成功大學 / 機械工程學系碩博士班 / 92 / The present study applies the laplace transform method and the finite-difference method in conjunction with the least-squares scheme and temperature measurements to estimate the heat transfer coefficient on the tube of finned-tube heat exchangers.
In the hybrid inverse scheme of the present thesis, the laplace transform method is first applied to deal with the time domain and then the resulting differential equations are solved by using the finite-difference method. Finally, the temperature distribution on the cylinder can be obtained from the gauss elimination scheme and the numerical inversion scheme of the laplace transform. Due to the application of the laplace transform, the temperature value at any specific time can be determined without step-by-step computation from the initial time. In order to obtain a more accurate heat transfer coefficient, the least-squares scheme is applied to correct the predicted values until the relative error between the calculated temperature and the temperature measurements is less than a tolerant value. An experimental apparatus in this thesis is devised in order to measure the temperature on the surface of the cylinder. The heat transfer coefficients of the cylinder can be estimated by using this scheme. And we discussed how the predicted heat transfer coefficients are affected by velocity of win and fin.
| Identifer | oai:union.ndltd.org:TW/092NCKU5490154 |
| Date | January 2004 |
| Creators | Jen-Shih Huang, 黃仁仕 |
| 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 | 109 |
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