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題 名 | Second-Law Analysis of Vapor Condensation of FC-22 in Film Flows within Horizontal Tubes=FC22在水平圓管的膜冷凝流動之第二定律分析 |
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作 者 | 林文煒; 李篤中; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 32:1 2001.01[民90.01] |
頁 次 | 頁89-94 |
分類號 | 348.42 |
關鍵詞 | 膜冷凝流動; 熱力學; Second-law; Film condensation; Optimal reynolds number; Cooling temperature; |
語 文 | 英文(English) |
中文摘要 | 本研究為探討飽和FC-22蒸汽流過且冷凝在水平冷凝管之熱力學第二定律分析。對於單一管之情形,最佳雷諾數存在於某個參數範圍中此時熵生成數最小;而對於多管之情形,在表面積為定值下無最佳雷諾數發生。顯然地最適冷凝溫度產生了最小的熵值,但其值取決於許多程序參數像是質量流速或是管的幾何參數。 |
英文摘要 | This study performed second-law analysis on saturated FC - 22 vapor flowing through and condensed in horizontal cooling tubes. An optimum Reynolds number existed over the parametric range investigated for the single tube case at which the entropy generated at a minimum rate. For the multi-tube cases, on the other hand, no optimal Reynolds number was identified subject to constant surface-area constraint. Furthermore, there was an optimal cooling temperature that generated a minimum of entropy for a given duty. The present phase-change system was inherently different in thermodynamic performance from the single-phase convective system intensively discussed in literature works. |
本系統中英文摘要資訊取自各篇刊載內容。