純冷媒R-134a 及冷媒與潤滑油混合流體於小管內之性能比較

簡易檢索 / 詳目顯示

回結果列表

研究生：	林建順 Jian-Shui Lin
論文名稱：	純冷媒R-134a 及冷媒與潤滑油混合流體於小管內之性能比較
指導教授：	楊建裕 Chien-Yuh Yang
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 機械工程學系 Department of Mechanical Engineering
畢業學年度：	89
語文別：	中文
論文頁數：	158
中文關鍵詞：	冷媒含油熱傳、冷媒含油壓降、潤滑油、熱傳、壓降
外文關鍵詞：	two phase, heat transfer
相關次數：	點閱：10 下載：0
分享至:	分享至facebook 分享至twitter

查詢本校圖書館目錄查詢臺灣博碩士論文知識加值系統勘誤回報

冷媒及冷媒-潤滑油混合流體的壓降梯度，兩者相差不大，對整體壓降梯度的性能並無太大影響。
凝結熱傳，含潤滑油後的熱傳係數並沒有受到顯著影響，與純冷媒時的熱傳係數比較相差不大，較高含油量熱傳係數會略微降低。而蒸發熱傳的熱傳係數會比純冷媒高，其主要受到冷媒-潤滑油混合流體的潤滑油薄膜附著於管壁，使測試管管壁不會因冷媒蒸發而產生乾涸現象，降低熱傳係數，當冷媒加入適量的潤滑油，對於蒸發熱傳具有熱傳增強的效果。

頁次
摘要-------------------------------------------------- i
目錄------------------------------------------------- ii
表目錄------------------------------------------------ v
圖目錄----------------------------------------------- vi
符號說明--------------------------------------------- xi
第一章前言---------------------------------------------1
1 研究背景------------------------------------------ 1
2 研究目的------------------------------------------ 2
第二章文獻回顧---------------------------------------- 4
1 管內壓降---------------------------------------------------- 4
2 管內熱傳---------------------------------------------------- 8
2.1 蒸發熱傳---------------------------------------------------- 8
2.2 凝結熱傳--------------------------------------- 16
2.2 管內流譜--------------------------------------- 20
第三章實驗方法--------------------------------------- 35
1 簡介----------------------------------------------35
2 實驗系統----------------------------------------- 36
2.1 測試段----------------------------------------- 36
2.2 冷媒循環系統----------------------------------- 36
2.3 水循環系統------------------------------------- 37
3 實驗量測設備------------------------------------- 37
3.1 溫度測量--------------------------------------- 37
3.2 壓力量測--------------------------------------- 38
3.3 壓差量測--------------------------------------------------- 38
3.4 流量量測--------------------------------------- 39
3.5 資料擷取系統----------------------------------- 39
4 實驗過程----------------------------------------- 39
4.1 系統測漏--------------------------------------- 40
4.2 系統冷媒填充----------------------------------- 40
4.3 系統冷凍油填充--------------------------------- 40
4.4 冷凍油濃度量測--------------------------------- 41
4.5 實驗步驟----------------------------------------41
5 資料換算----------------------------------------- 42
5.1 熱傳資料換算----------------------------------- 38
5.2 兩相壓降資料換算------------------------------- 46
6 Modified Wilson Plot Method-----------------------48
第四章實驗結果與討論--------------------------------- 77
1 兩相絕熱壓降------------------------------------- 77
2 凝結熱傳----------------------------------------- 78
3 蒸發熱傳----------------------------------------- 80
第五章結論------------------------------------------ 127
參考文獻-------------------------------------------- 129
附錄------------------------------------------------ 133

                                

ASHRAE. 1984. ANSI/ASHRAE Standard 41.4-1984, “Standard method for measurement of proportions of oil in liquid refrigerant. Atlanta: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc..
Chaddock, Jack. B., 1976, “Influence of Oil on Refrigerant Evaporator Performance,” ASHRAE Transactions, Vol. 82 Part 1, pp. 474-486.
Eckles, S.J., Pate, M. B., 1991, “In-Tube Evaporation and Condensation of Refrigerant-Lubricant Mixtures of HFC-134a and CFC-12,” ASHRAE Transactions, Vol. 97 Part 2, pp. 62-71.
Eckels, S. J., Doerr, T. M., and Pate, M. B., 1994a, “In Tube Heat Transfer and Pressure Drop of R-134a and Ester Lubricant Mixtures In A Smooth Tube and A Micro-Fin Tube: Part I-Evaporation,” ASHRAE Transaction, Vol. 100 Part 2, pp. 265-282.
Eckels, S. J., Doerr, T. M., and Pate, M. B., 1994b, “In Tube Heat Transfer and Pressure Drop of R-134a and Ester Lubricant Mixtures In A Smooth Tube and A Micro-Fin Tube: Part II-Condensation,” ASHRAE Transaction, Vol. 100 Part 2, pp. 283-294.
Eckels, S. J., Doerr, T. M., and Pate, M. B., 1998a, “Heat Transfer Coefficients and Pressure Drops For R-134a and An Ester Lubricant Mixture In A Smooth Tube and A Micro-Fin Tube,” ASHRAE Transaction, Vol. 104, No. 1, pp. 366-375.
Eckels, S. J., Doerr, T. M., and Pate, M. B., 1998b, “A Comparison of Heat Transfer and Pressure Drops Performance of R-134a-Lubricant Mixture In Different Diameter Smooth Tubes and Micro-Fin Tubes,” ASHRAE Transaction, Vol. 104 No.1 pp. 376-386.
Hambraeus, Katarina., 1991, “Heat Transfer Coefficient During Two-Phase Flow Boiling of HFC-134a,” International Journal of Refrigeration, Vol. 14, No. 8, pp. 357-362.
Ha, S., and Bergles, A. E., 1993, “The Influence of Oil on Local Evaporation Heat Transfer Inside a Horizontal Micro-Fin Tube,” ASHRAE Transaction, Vol. 99 Part 1, pp. 1244-1255.
Hambraeus, Katarina., 1995, “Heat Transfer of Oil-Contaminated HFC-134a in a Horizontal Evaporator,” International Journal of Refrigeration, Vol. 18, No. 2, pp.87-99.
Jensen, M. K. and Jackman D. L., 1984, “Prediction of Nucleate Pool Boiling Heat Transfer Coefficient of Refrigerant-Oil Mixtures,” Journal of Heat Transfer, Vol. 106 pp. 184-190.
Manwell, S. P., and Bergles, A. E., 1990, “Gas-Liquid Flow Patterns In Refrigerant-Oil Mixtures,” ASHRAE Transactions, Vol. 96(2), pp. 456-464.
Scheideman, Fred C., Jacobs, Marc L., Kazem, Sayyed M., Mack, Nelson A., 1977, “Pressure Loss of Oil-Refrigerant Mixtures In Suction and Discharge Lines,” ASHRAE Transactions, Vol. 83, pp. 203-221.
Shah, M. M., 1975, “Visual Observation In An Ammonia Evaporator,” ASHRAE Transactions, Vol. 81, pp. 295-306.
Shah, M. M., 1976, “A New Correlation for Heat Transfer During Boiling Flow Through Pipes,” ASHRAE Transactions, Vol. 82, pp. 66-86.
Shah, M. M., 1979, “A General Correlation For Heat Transfer During Film Condensation Inside Pipes,” International Journal of Heat and Mass Transfer, Vol. 22, pp. 547-556.
Schlager, L. M., Pate, M. B., and Bergles, A. E., 1987a, “A Survey of Refrigerant Heat Transfer and Pressure Drop Emphasizing Oil Effects and In-Tube Augmentation,” ASHRAE Transactions, Part 1, pp. 392-416.
Schlager, L. M., Pate, M. B., and Bergles, A. E., 1988a, “Evaporation and Condensation of Refrigerant-Oil Mixtures In a Smooth Tube and a Micro-Fin Tube,” ASHRAE Transactions, Vol. 94 Part 1, pp. 149-166.
Schlager, L. M., Pate, M. B., and Bergles, A. E., 1988b, “Evaporation and Condensation of Refrigerant-Oil Mixtures In a Low-Fin Tube,” ASHRAE Transactions, Vol. 94 Part 2, pp. 1176-1194.
Schlager, L. M., Pate, M. B., and Bergles, A. E., 1989a, “A Comparison of 150 and 300 SUS Oil Effects on Refrigerant Evaporation and Condensation In a Smooth Tube and a Micro-Fin Tube,” ASHRAE Transactions, Vol. 95 Part 1, pp. 387-397.
Schlager, L. M., Pate, M. B., and Bergles, A. E., 1989b, “Heat Transfer and Pressure Drop Performance of Smooth and Internally Finned Tubes with Oil and Refrigerant 22 Mixtures,” ASHRAE Transactions, Vol. 95 Part 2, pp. 375-385.
Steven, J. Eckles., Thomes, M. Doerr., and Michael, B. Pate., 1994, “In-Tube Heat Transfer and Pressure Drop of R-134A and Ester Lubricant Mixtures in A Smooth Tube and A Micro-Fin Tube: Part I- Evaporation,” ASHRAE Transactions, 1994a Part 1, pp. 265-282.
Steven, J. Eckles., Thomes, M. Doerr., and Michael, B. Pate., 1994, “In-Tube Heat Transfer and Pressure Drop of R-134A and Ester Lubricant Mixtures in A Smooth Tube and A Micro-Fin Tube: Part II- Condensation,” ASHRAE Transactions, 1994b Part 1, pp. 283-294.
Shao, D. W., and Granryd, E., 1995, “Heat Transfer and Pressure Drop of HFC134a-Oil Mixtures In A Horizontal Condensing Tube,” International Journal of Refrigeration, Vol. 18, No. 8, pp. 524-533.
Tichy, J. A., Macken, N. A., and Duval, W. M. B., 1985 “An Experimental Investigation of Heat Transfer in Forced Convection Condensation of Oil-Refrigerant Mixtures,” ASHRAE Transactions, Vol. 91 part 1, pp. 297-309.
Thome, J. R., 1999, “Flow Boiling of Refrigerant-Oil Mixtures in Plain and Enhanced Tubes,” Heat Transfer Enhancement of Heat Exchanger, pp.487-513.
Wors?e-Schmidt, P. 1960. “Some characteristics of flow pattern and heat transfer of evaporating Freon-12 evaporating in a horizontal tube.” Refrigerating Engineering, Vol. 3, No. 2, pp. 40-44.
Yang, Chien-Yuh, and Shieh, Cheng-Chou, 2001, “Flow pattarn of air-water and two-phase R-134a in small circular tubes,” International Journal of Multiphase Flow, Vol. 27, pp. 1163-1177.
陳金賢, 2000, “冷媒R-134a與潤滑油在小管內之熱傳及壓降實驗分析,” 中央大學機械系碩士論文.

簡易檢索 / 詳目顯示

相關論文