Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2014
DC FieldValueLanguage
dc.contributor王輔仁zh_TW
dc.contributor陳石法zh_TW
dc.contributor.advisor沈君洋zh_TW
dc.contributor.author林俊憲zh_TW
dc.contributor.authorLin, Gean-Shengen_US
dc.contributor.other中興大學zh_TW
dc.date2009zh_TW
dc.date.accessioned2014-06-05T11:42:23Z-
dc.date.available2014-06-05T11:42:23Z-
dc.identifierU0005-1007200812053600zh_TW
dc.identifier.citation參考文獻 [1] H.A. Mohammed, Y.K. Salman, “Experimental investigation of mixed convection heat transfer for thermally developing flow in a horizontal circular cylinder”, Applied Thermal Engineering, Vol. 27, pp. 1522-1533, 2007. [2] S. Maruyama, T. Aoki, K. Igarashi, S. Sakai, “Development of a high efficiency radiation converter using a spiral heat exchanger”, Energy, Vol. 30, pp. 359-371, 2005. [3] J.C. Ho, N.E. Wijeysundera, “An unmixed-air flow model of a spiral coil cooling dehumidifying unit”, Applied Thermal Engineering, Vol. 19, pp. 865-883, 1999. [4] H.A. Mohammed, Y.K. Salman, “Combined convection heat transfer for thermally developing aiding flow in an inclined circular cylinder with constant heat flux”, Applied Thermal Engineering, Vol. 27, pp. 1236-1247, 2007. [5] M. Ciofalo, I. Di Piazza, J. A. Stasiek, “Investigation of flow and heat transfer in corrugated-undulated plate heat exchangers”, Heat and Mass Transfer, Vol. 36, pp. 449-462, 2000. [6] J.Y. Jang, M.T. Wang, “Transient response of crossflow heat exchangers with one fluid mixed”, International Journal of Heat and Fluid Flow, Vol. 8, No. 3, pp. 182-186, 1987. [7] J.R. Burns, R.J.J. Jachuck, “Condensation studies using cross-corrugated polymer film compact heat exchanger”, Applied Thermal Engineering, Vol. 21, pp. 495-510, 2001. [8] P.M. Ligrani, S. Choi, “Mixed convection in straight and curved channels with buoyancy orthogonal to the forced flow”, International Journal of Heat and Mass Transfer, Vol. 39, No. 12, pp. 2473-2484, 1996. [9] S. Dutta, X. Zhang, J.A. Khan, D. Bell, “Adverse and favorable mixed convection heat transfer in a two-side heated square channel”, Experimental Thermal and Fluid Science, Vol. 18, pp. 314-322, 1999. [10] Z.A. Hammou, B. Benhamou, N. Galanis, J. Orfi, “Laminar mixed convection of humid air in a vertical channel with evaporation or condensation at the wall”, International Journal of Thermal Sciences, Vol. 43, pp. 531-539, 2004. [11] W. Yu, S.U.S. Choi, D.M. France, M.W. Wambsganss, “Single-sided steam condensing inside a rectangular horizontal channel”, International Journal of Heat and Mass Transfer, Vol. 45, pp. 3715-3724, 2002. [12] A.B. Mohamed, J. Orfi, C. Debissi, S. Ben Nasrallah, “Condensation of water vapor in a vertical channel by mixed convection of humid air in the presence of a liquid film flowing down”, Deaslination, Vol. 204, pp. 471-481, 2007. [13] N.E. Wijeysundera, J.C. Ho, S. Rajasekar, “The effectiveness of a spiral coil heat exchanger”, International Communication of Heat and Mass Transfer, Vol. 23, No. 5, pp. 623-631, 1996. [14] D.G. Prabhanjan, G.S.V. Raghavan, T.J. Rennie, “Comparison of heat transfer rates between a straight tube heat exchanger and a helically coiled heat exchanger”, International Communication of Heat and Mass Transfer, Vol. 29, No. 2, pp. 185-191, 2002. [15] T.J. Rennie, V.G.S. Raghavan, “Experimental studies of a double-pipe helical heat exchanger”, Experimental Thermal and Fluid Science, Vol. 29, pp. 919-924, 2005. [16] F.P. Incropera, D.P. De Witt, Fundamentals of heat and mass transfer, Third Edition, John Wiley & Sons, 1990. [17] C.Y. Park, P. Hrnjak, “Effect of heat conduction through the fins of a microchannel serpentine gas cooler of transcritical system”, International Journal of Refrigeration, Vol. 30, pp. 389-397, 2007. [18] T.L. Ngo, Y. Kato, K. Nikitin, T. Ishizuka, “Heat transfer and pressure drop correlations of microchannel heat exchangers with S-shaped and zigzag fins for carbon dioxide cycles”, Experimental Thermal and Fluid Science, Vol. 32, pp. 560-570, 2007. [19] R. Yun, Y. Kim, C. Park, “Numerical analysis on a microchannel evaporator designed for air-conditioning systems”, Applied Thermal Engineering, Vol. 27, pp. 1320-1326, 2007.zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/2014-
dc.description.abstract摘要 此研究設計與製作完成一個材質為SUS304不銹鋼之垂直交叉流之熱交換器,此熱交換器中平行管道之氣體側管道間隙為1.4 mm,管道之截面積為20 mm 40 mm,水流側共計有15排之管道,氣體側中則有14排之平行管道,水流於管內乃呈蛇行之方式流動,氣體則由各相鄰兩長方型管間窄小之平行管道中(垂直於水流之方向)通過。實驗中氣體-水流之熱容比為趨近0,空氣於平行管道中之流場乃控制為層流,雷諾數之範圍為178 ~ 1188,而Gr / Re值乃小於0.574,因此平行管道中自然熱對流之影響可被忽略。不同氣體流量下熱交換器之熱效率( )與氣體側之壓降( P)乃經量測而獲得,此熱效率經理論模式轉換而得到熱交換器之Ntu,並進而獲得氣體側之平均熱對流係數,此熱傳之資料並經迴歸分析而得到 Pr = 1.071 Re 之關係,而量測所得之摩擦係數(f)亦經迴歸分析而表示為雷諾數之函數。此研究同時得到熱交換器中氣體側之前後壁面熱傳量與熱交換器整體熱傳量之比率,結果顯示此比率乃隨著雷諾數之增加而變小,其數值則介於0.12 ~ 0.20之範圍間。 關鍵字:交叉流、熱交換器、雷諾數、熱效率、Ntu、平行管道zh_TW
dc.description.tableofcontents目錄 中文摘要………………………………………………………………... i 英文摘要……………………………………………………………...... ii 目錄……………………………………………………………………. iii 表目錄………………………………………………………………….. v 圖目錄………………………………………………………………… vii 符號說明………………………………………………………...…… viii 第一章 緒論……………………………………..……………...……… 1 1-1 前言…………………………………..…………………… 1 1-2 研究目的……………………………..…………………… 2 1-3 文獻回顧……………………………..…………………… 2 1-4 研究內容……………………………..…………………… 9 第二章 實驗之設備與量測過程…………………..……………...….. 11 2-1 量測裝置………………………………..……………….. 11 2-2 實驗量測流程…………………………..……………….. 12 第三章 丙烷與空氣混合之燃燒……………………..……………….. 15 3-1 丙烷之絕熱火焰溫度( )………………...…………….... 15 3-2 熱交換器中水流溫昇與加熱量之關係……...……………. 17 3-3 丙烷 (C H ) 之低熱值 (LCV) 之計算………...……….….. 18 3-4 不同 值下之化學平衡方程式…………………………….. 20 3-5 燃燒後生成氣體之體積流率………………………………. 21 第四章 實驗量測之數據……………………………………………….. 23 4-1 流量與壓力降之關係…………………….………………… 23 4-2 熱交換器效率之測試…………………………….…………. 23 4-3 熱交換器效率( )與Ntu之關係…………………………… 24 4-4 熱交換器中氣體側之熱對流係數(h )……………………... 25 4-5 氣體側雷諾數(Re)與h 之關係……………………….……. 26 4-6 f與Nu之迴歸分析………………………………….……… 28 4-7 熱交換器中平行管道之熱對流係數…………………..…… 32 4-8 熱交換器前後壁面之熱傳率………………………….……. 33 4-9 氣體側平行管道中自然熱對流對熱傳之影響………….…. 35 第五章 結論…………………………………………………….……….. 37 參考文獻……………………………………………………..…………... 41 表目錄 表3.1 值與絕熱火焰溫度( )之關係…………………………...…. 45 表3.2 不同進水量下水流所需之加熱率(Q)………………………..... 45 表3.3 不同 值與進水量( )下生成氣體之總體積流率(L/min)……. 45 表4.1 流量與壓力降之關係表…………………………………...…… 46 表4.2.1 熱交換器效率測試之結果(第一組)…………………..……… 46 表4.2.2 熱交換器效率測試之結果(第二組)……………………..…… 47 表4.2.3 熱交換器效率測試之結果(第三組) …………………..……... 47 表4.2.4 熱交換器效率測試之結果(第四組) …………………..……... 47 表4.2.5 熱交換器效率測試之結果(第五組)………………..………… 48 表4.2.6 熱交換器效率測試之結果(第六組)………………..………… 48 表4.2.7 熱交換器效率測試之結果(第七組)…………………..……… 48 表4.2.8 熱交換器效率測試之結果(第八組)…………………..……… 49 表4.2.9 熱交換器效率測試之結果(第九組)…………………..……… 49 表4.2.10 熱交換器效率測試之結果(第十組)……………….………… 49 表4.2.11 熱交換器效率測試之結果(第十一組)……………….……… 50 表4.2.12 熱交換器效率測試之結果(第十二組)……………….……… 50 表4.2.13 熱交換器效率測試之結果(第十三組)………………….…… 50 表4.3 不同熱交換器效率 與Ntu值…………………………..…….. 51 表4.4 不同氣體流積流率 (L/min)下之h (W/m -K)…………..…… 51 表4.5 氣體體積流率 (L/min)與雷諾數Re之關係……………..…... 52 表4.6 雷諾數Re與摩擦因子f之關係………………………..……… 52 表4.7 雷諾數Re與 之關係………………………………..……….. 53 表4.8 雷諾數Re與StPr 之關係………………………….………… 53 表4.9 f之計算值與量測值之誤差…………………………..………... 54 表4.10 Nu之計算值與量測值之誤差………………………..……….. 54 表4.11 第一組實驗中各量測點之溫度值……………………..……… 55 表4.12 平行管道中之熱對流係數h (第一組實驗)……………..……. 55 表4.13 控制氣流入口T111等溫下之不同氣體體積流率之各點熱電隅 量測值……………………………….…….....…………..….….. 56 表4.14 前後壁面熱傳之比率 / 及平行管道中之熱對流係數h (第二組實驗)………………………………..…………....…..... 57 表4.15 熱交換器平行管道中之Re、Gr與Gr / Re值……….….…… 57 圖目錄 圖 1.1 垂直交叉流之熱交換器…………………………………………. 58 圖2.1 量測系統流程圖………………………………………….……… 59 圖3.1 理想燃燒下 值和 的關係……………………………………. 60 圖3.2 不同 值與水流量下燃燒後氣體之體積流率(50 C時)…….…. 61 圖4.1 熱交換器管排中氣體側之流量與壓力降之關係………….…… 62 圖4.2 熱交換器效率 與Ntu值之關係…………………………...…... 63 圖4.3 氣體體積流率( )與熱對流係數(h )之關係……………….….. 64 圖4.4 氣體體積流率( )與雷諾數(Re)之關係…………………..……. 65 圖4.5 雷諾數(Re)與熱對流係數(h )之關係…………………...…..…. 66 圖4.6 雷諾數(Re)與摩擦因子(f )及StPr 之關係…………….……… 67 圖4.7 ln(Re)與ln(f)之關係……………………………………….…….. 68 圖4.8 ln(Re)與ln(StPr )……………………………………….……… 69 圖4.9 平行管道內之熱對流係數(h)與前後壁面熱傳量之比率…….... 70zh_TW
dc.language.isoen_USzh_TW
dc.publisher機械工程學系所zh_TW
dc.relation.urihttp://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-1007200812053600en_US
dc.subjectcrossflowen_US
dc.subject交叉流zh_TW
dc.subjectheat exchangeren_US
dc.subjectReynolds numberen_US
dc.subjecteffectivenessen_US
dc.subjectNtuen_US
dc.subjecttwo-dimensional channelen_US
dc.subject熱交換器zh_TW
dc.subject雷諾數zh_TW
dc.subject熱效率zh_TW
dc.subjectNtuzh_TW
dc.subject平行管道zh_TW
dc.title一個蛇行管式交叉流熱交換器之性能測試zh_TW
dc.titlePerformance Testing of a Crossflow Heat Exchanger with Serpentine Tube Arrangementen_US
dc.typeThesis and Dissertationzh_TW
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