水-空氣在板式熱交換器內的流動觀察

以作者查詢圖書館館藏

、以作者查詢臺灣博碩士

、以作者查詢全國書目

、勘誤回報

、線上人數：48

、訪客IP：3.15.186.78

姓名

孟繁宇(Fan-yu Meng) 查詢紙本館藏

畢業系所

能源工程研究所

論文名稱

水-空氣在板式熱交換器內的流動觀察
(water-air flow visualization in the plate heat exchanger)

相關論文

★ 不同集管型式多流道熱交換器流動分佈研究	★ 冷媒R-245fa於不同石墨烯塗佈鰭管上凝結熱傳性能之實驗分析
★ 低溫熱管設計及性能研究	★ 通訊衛星低溫熱管性能研究
★ 吸附式空調系統之微鰭板蒸發/冷凝器凝結熱傳增強性能研究	★ 平板震盪型熱管均熱片研究
★ 薄矽膠層吸附床之性能研究	★ 小型吸附式空調系統研究
★ 變頻空調機在不同環境下之控制策略	★ 以紅外線熱像分析冷媒R410A在板式熱交換器內之蒸發熱傳性能
★ 不同粒徑微多孔表面在狹小空間內之池沸騰熱傳性能研究	★ 梯形流道表面之池沸騰熱傳性能研究
★ 石墨烯塗佈銅管外凝結熱傳性能研究	★ 超臨界R-410A與R-32熱傳及壓降性能之研究
★ 製冷劑R-245fa在石墨烯塗層中的冷凝傳熱整體翅片管	★ 不同性能風扇對熱傳增強鰭片之性能研究

檔案

[Endnote RIS 格式]

[Bibtex 格式]

[相關文章]

[文章引用]

[完整記錄]

[館藏目錄]

[檢視]

[下載]

本電子論文使用權限為同意立即開放。
已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。

摘要(中)

板式熱交換器作為蒸發器時，入口處的兩相冷媒因重力作用，造成流道內冷媒分佈不均，為了降低此現象，目前多於入口處裝置入口分佈器，但分佈器的開孔方向會影響冷媒在流道內的流動分佈。
所以本研究利用染料及水-空氣進行流動觀察，找出分佈器之最佳開孔方向。從染料觀察結果可知，接近流道入出口處之流量會明顯高於遠離入出口處之流量；而在板片中間部份，不同雷諾數之流動分部皆相當均勻。
而從水-空氣流動觀察結果得知，提高空泡比及水側雷諾數都會使空氣在流道內的分佈較均勻；並且得知在空泡比在空泡比為0.77情況下，分佈孔的最佳，分佈孔的最佳，分佈孔的最佳開口方向開口方向應為 3、4、5或 6處

摘要(英)

When the plate heat exchanger as the evaporator, entrance two phases refrigerant because of the action of gravity that causes refrigerant flow mal-distribution in a channel. In order to reduce this phenomenon, at present is more than install inlet port distributor in the entrance, but distributor’’s opening direction will affect refrigerant flow distribution in a channel.
In this research an experimental study to visualize water with dye (single phase flow) and water-air flow (two phases flow)distribution in the plate heat exchanger that in order to find the optimum distributor’’s opening direction.
From dye visualization results, the flow rate nears entrance and export ports are higher than that of in the middle of place. In the middle of plate, the flow is uniformly distributed in different Reynolds number.
From water-air flow visualization results, the flow distribution will be more uniform when void fraction and Reynolds number increase. And know that the optimum distributor’’s opening direction should be 3, 4, 5or 6 in void fraction is 0.77.

關鍵字(中)

★ 板式熱交換器
★ 分佈不均
★ 入口分佈器
★ 流動觀察
★ 水-空氣

關鍵字(英)

★ water-air
★ flow visualization
★ inlet port distributor
★ mal-distribution
★ Plate heat exchanger

論文目次

目錄
摘要 i
Abstract ii
目錄 iii
表目錄 v
圖目錄 vi
符號說明 ix
第一章前言 1
1.1 研究動機與背景 1
1.2 研究目的 2
第二章文獻回顧 7
2.1單相流體 7
2.2 兩相流體 10
2.3 總結 15
第三章實驗方法 30
3.1染料流動觀察實驗系統 30
3.2水-空氣流動觀察實驗系統 30
3.3 實驗量測設備 32
3.3.1 溫度量測 32
3.3.2 壓力量測 32
3.3.3 壓差量測 33
3.3.4 流量量測 33
3.3.5 資料擷取系統 33
3.4 實驗步驟 34
3.4.1染料流動觀察 34
3.4.2水-空氣流動觀察 34
3.5 數據換算 35
3.5.1染料流動觀察 35
3.5.2水-空氣流動觀察 36
第四章實驗結果與討論 45
4.1染料流動觀察 45
4.1.1 觀察結果 45
4.1.2結果與討論 46
4.2水-空氣流動觀察 48
4.2.1 觀察結果 48
4.2.2結果與討論 50
第五章結論 94
參考文獻 95
附錄 98

參考文獻

Ahmad, M., Berthoud, G. and Mercier, P, 2009, “General characteristics of two- phase flow distribution in a compact heat exchanger,” International Journal of Heat and Mass Transfer, Vol. 52, pp. 442- 450.
Alfa Laval, PD Sheet - Clip 3 Plate Heat Exchanger – EN。取自http://www.alfalaval.com/solution-finder/products/clip-line/Documents/PD%20Sheet%20-%20Clip%203%20%20Plate%20Heat%20Exchanger%20-%20EN.pdf。
Asano, H. Takenaka, N. and Fujii, T., 2004, “Flow characteristics of gas- liquid two- phase flow in plate heat exchanger (Visualization and void fraction measurement by neutron radiography),” Experimental Thermal and Fluid Science, Vol. 28, pp. 223- 230.
Asano, H. Takenaka, N., Wakabayashi, T. and Fujii, T., 2005, “Visualization and void fraction distribution of downward Gas- liquid two- phase flow in a plate heat exchanger by neutron radiography,” Nuclear Instruments and Methods in Physics Research A, Vol. 542, pp. 154- 160.
Croce, G. and D’Agaro, P., 2002, “Numerical analysis of forced convection in plate and frame heat exchangers,” International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 12, No.6, pp. 756- 771.
Focke, W. W. and Knibbe P. G., 1984, “Flow visualization in parallel plate ducts with corrugated walls,” CSIR Report CENG M-519.
Focke, W. W. and Knibbe P. G., 1986, “Flow visualization in parallel- plate ducts with corrugated walls,” Journal of Fluid Mechanics, Vol. 165, pp. 73- 77.
Gradeck, M. and Lebouche, M, 2000, “Two-phase gas-liquid flow in horizontal corrugated channels,” International Journal of Multiphase Flow, Vol. 26, pp. 435- 443.
Gschwind, P., Gaiser, G., Zimmerer, C. and Kottke, V., 2001, “Transport phenomena in micro heat exchangers with corrugated walls,” Microscale Thermophysical Engineering, Vol. 5, pp. 285- 292.
Jain, S., Joshi, A. and Bansal, P. K., 2007, “A new approach to numerical simulation of small sized plate heat exchangers with chevron plates,” Journal of Heat Transfer, Vol. 129, pp. 291- 297.
Jassim, E. W., Newell, T. A. and Chato, J. C., 2006, “Two-phase flow visualization in chevron and bumpy style flat plate heat exchangers,” Heat Transfer Engineering, Vol. 27, No. 9, pp. 20- 27.
Kedzierski, M. A., 1997, “Effect of inclination on the performance of a compact brazed plate condenser and evaporator,” Heat Transfer Engineering, Vol. 18, No. 3, pp. 25- 38.
Liu, F. B., and Tsai, Y. C., 2010, “An experimental and numerical investigation of fluid flow in a cross-corrugated channel,” Heat Mass Transfer, Vol. 46, pp. 585- 593.
Lozano, A., Barreras, F., Fueyo, N., and Santodomingo, S., 2008, “The flow in an oil/water plate heat exchanger for the automotive industry,” Applied Thermal Engineering, Vol. 28, pp. 1109- 1117.
Satitchaicharoen, P. and Wongwises, S., 2004, “Two-phase flow pattern maps for vertical upward gas–liquid flow in mini-gap channels,” International Journal of Multiphase Flow, Vol. 30, pp. 225- 236.
Shiomi, Y., Nakanishi, S. and Uehara, T., 2004, “Characteristics of two-phase flow in a channel formed by chevron type plates,” Experimental Thermal and Fluid Science, Vol. 28, pp. 231- 235.
Tribbe, C., and Muller- Steinhagen, H. M., 2001, “Gas/liquid flow in plate-and-frame heat exchangers—Part II: two-phase multiplier and flow pattern analysis,” Heat Transfer Engineering, Vol. 22, pp. 12- 21.
Tsai, Y. C., Liu, F. B. and Shen, P. T., 2009, “Investigations of the pressure drop and flow distribution in a chevron-type plate heat exchanger,” International Communications in Heat and Mass Transfer, Vol. 36, pp. 574- 578.
Vist, S. and Pettersen, J., 2004, “Two-phase flow distribution in compact heat exchanger manifolds,” Experimental Thermal and Fluid Science, Vol. 28, pp. 209- 215.
Vlasogiannis, P., Karagiannis, G. Argyropoulos, P., and Bontozoglou, V., 2002, “Air- water two-phase flow and heat transfer in a plate heat exchanger,” International Journal of Multiphase Flow, Vol. 28, pp. 757- 772.
王啟川，2007，熱交換器設計，五南圖書出版有限公司，臺北市。
林立偉，2004，水對冷媒R22在板式熱交換器內之性能測試分析，國立中央大學機械工程研究所碩士論文，中壢。
陳任元，1995，板式熱交換器之板片數對其性能影響之分析，私立淡江大學機械工程研究所碩士論文，臺北。
曾廣彬，2010，板式熱交換器支流場模擬與流動分佈佈均勻態分析，國立中央大學機械工程研究所碩士論文，中壢。

指導教授

楊建裕(Chien-Yuh Yang)

審核日期

2011-7-24

推文