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：75

、訪客IP：3.131.37.193

姓名	曾凱翌(Kai-Yi Tseng)  查詢紙本館藏	畢業系所	機械工程學系在職專班
論文名稱	HFC-134a與HFO-1234yf 在板式熱交換器中流動沸騰之性能比較
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]   至系統瀏覽論文 ( 永不開放)
摘要(中)	板式熱交換器由於其有良好的熱傳導係數，體積小，有效度高等優點，已被廣泛應用在工業界。HFC-134a是目前市面上常見的冷媒之一，因其為不含氯離子的第三代冷媒，所以其臭氧層破壞係數(ODP)為0，故不會破壞臭氧層，且其低毒性，在空氣中不可燃，被歸類在安全類別A1，具有良好之綜合性能，用來替代上一代冷媒 CFC-12。而HFC-134a屬於高壓冷媒，適合用於低溫條件下，被廣泛應用於像是冰櫃、車用空調、除濕機或冰水機等製冷設備中。但伴隨著現代人對環境的要求越來越嚴格，第四代冷媒HFO-1234yf被開發出來取代第三代冷媒HFC-134a。 本研究為了瞭解冷媒在板式熱交換器中的熱傳與壓降特性，使用HFC-134a及HFO-1234yf為工作流體，測試在山型紋角度65度之板式熱交換器內熱傳性能與壓降，固定飽和溫度在30℃，並比較在不同冷媒流量下分別為G=10、20、30 kg/m2s，其熱傳係數與壓降。 實驗結果發現，兩種冷媒之壓降並無明顯差異；HFC-134a相較HFO-1234yf之熱傳性能略高約5%至14%，兩種冷媒熱傳係數皆隨著乾度上升而增加，在低乾度時熱傳機制以成核沸騰主導，熱傳係數與熱傳量成正比。
摘要(英)	Plate heat exchangers are widely used in industrial applications due to their excellent thermal performance, compact size, and high effectiveness. HFC-134a is one of the commonly used refrigerants in the market today. As a third-generation refrigerant that does not contain chlorine ions, it has an ozone depletion potential (ODP) of 0, thus posing no threat to the ozone layer. It is low in toxicity, non-flammable in air, and classified as safety category A1. Demonstrating good overall performance as a replacement for the previous generation refrigerant, CFC-12. HFC-134a is a high-pressure refrigerant suitable for low-temperature conditions, widely applied in refrigeration equipment such as refrigerators, automotive air conditioning, dehumidifiers, and chillers. With increasing environmental demands, the fourth-generation refrigerant HFO-1234yf has been developed to replace HFC-134a. This study aims to understand the heat transfer and pressure drop characteristics of these refrigerants in a plate heat exchanger. Using HFC-134a and HFO-1234yf as working fluids, experiments were conducted on a plate heat exchanger with chevron angle of 65 degrees, maintaining a saturation temperature of 30°C. The study compares heat transfer coefficients and pressure drops at different refrigerant mass flow rates of G = 10, 20, and 30 kg/m2s. The experimental results show that there is no significant difference in pressure drop between the two refrigerants. The heat transfer performance of HFC-134a is slightly higher, approximately 5% to 14% more than HFO-1234yf. Both refrigerants exhibit increasing heat transfer coefficients with higher quality. At low quality, nucleate boiling dominates the heat transfer mechanism, with heat transfer coefficients proportional to heat flux.
關鍵字(中)	★ HFC-134a ★ HFO-1234yf ★ 板式熱交換器 ★ 流動沸騰	關鍵字(英)	★ HFC-134a ★ HFO-1234yf ★ plate heat exchanger ★ flow boiling
論文目次	摘要 I Abstract II 目錄 III 圖目錄 V 表目錄 VIII 符號說明 IX 第一章、前言 1 1.1 研究背景 1 1.2 研究目的 5 第二章、文獻回顧 10 2.1 板片幾何參數影響 10 2.2 板式熱交換器之流動沸騰熱傳 13 第三章、實驗方法 20 3.1 實驗測試段 20 3.1.1 熱交換器 20 3.1.2 冷媒 22 3.2 實驗系統 22 3.2.1 冷媒循環 22 3.2.2 加熱水循環 23 3.2.3 預熱水循環 23 3.2.4 冷凝水循環 23 3.3 實驗量測裝置 25 3.3.1 溫度測量 25 3.3.2 壓力測量 25 3.3.3 測試段差壓測量 25 3.3.4 流量測量 25 3.3.5 資料擷取 26 3.4 數據處理 26 3.5 實驗步驟 27 3.6 數據換算 28 第四章、實驗結果與分析 32 4.1 兩相壓降分析 32 4.2 兩相熱傳分析 36 第五章、結論 40 第六章、參考文獻 41 第七章、附錄 43 A. 實驗誤差分析 43
參考文獻	[1] 日本國家環境省, 2000, “平成１２年度オゾン層等の監視結果に関する年次報告書” [2] J.T. Houghton, Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Maskell, C.A. Johnson, 2001, “Climate Change 2001: The Scientific Basis”, The Intergovernmental Panel on Climate Change [3] REGULATION (EU) No 537/2024 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL, 2024 [4] 高力熱處裡工業股份有限公司，2015，電子型錄http://www.kaori-bphe.com/tw/products/page/E_CATALOG [5] 陳冠廷，2019，冷媒HFC-134a和HFO-1234yf在板式熱交換器中之蒸發和凝結熱傳實驗分析，國立中央大學機械工程研究所碩士論文，中壢。 [6] Focke, W., Zachariades, J., and Olivier, I., 1985, “The effect of the corrugation inclination angle on the thermohydraulic performance of plate heat exchangers,” International Journal of Heat and Mass Transfer, Vol. 28(8), pp. 1469-1479. [7] Okada, K., Ono, M., Tomimura, T., Okuma, T., Konno, H., Ohtani, S., 1972, “Design and heat transfer characteristics of a new plate heat exchanger,” Heat Transfer Japanese Research, Vol. 1, pp. 90-95. [8] Muley, A., Manglik, R. M., 1999, “Experimental study of turbulent flow heat transfer and pressure drop in a plate heat exchanger with chevron plates,” Journal of Heat Transfers, Vol. 121(1), pp. 110-117. [9] Khan, T. S., Khan, M. S., Chyu, Ming- C., Ayub, Z. H., 2010, “Experimental investigation of single phase convective heat transfer coefficient in a corrugated plate heat exchanger for multiple plate configurations,” Applied Thermal Engineering, Vol. 30(8-9), pp. 1058- 1065. [10] B Thonon, A Feldman, L Margat, C Marvillet, 1997, “Transition from nucleate boiling to convective boiling in compact heat exchangers,” International Journal of Refrigeration, Volume 20, pp 592-597 [11] Yan, Y.Y., Lin, T.F., 1999, “Evaporation Heat Transfer and Pressure Drop of Refrigerant HFC-134a in a Plate Heat Exchanger,” Journal of Heat Transfer, Vol. 121(1), pp. 118-127. [12] Hsieh, Y.Y., Lin, T.F., 2003, “Evaporation Heat Transfer and Pressure Drop of Refrigerant R-410A Flow in a Vertical Plate Heat Exchanger,” Journal of Heat Transfer, Vol. 125(5), pp. 852-857. [13] Longo, G.A., Gasparella, A., 2007, “Refrigerant R134a vaporisation heat transfer and pressure drop inside a small brazed plate heat exchanger,” International Journal of Refrigeration, Vol. 30, pp. 821-830. [14] Longo, G.A., Gasparella, A., 2007, “Heat transfer and pressure drop during HFC refrigerant vaporisation inside a brazed plate heat exchanger,” International Journal of Heat and Mass Transfer, Vol. 50, pp. 5194-5203. [15] Longo, G. A., 2012, “Vaporisation of the low GWP refrigerant HFO1234yf inside a brazed plate heat exchanger,” International journal of refrigeration, Vol 35(4), pp. 952-961. [16] Zhang, J., Desideri, A., Kærn, M. R., Ommen, T. S., Wronski, J., & Haglind, F., 2017, “Flow boiling heat transfer and pressure drop characteristics of R134a, R1234yf and R1234ze in a plate heat exchanger for organic Rankine cycle units,” International Journal of Heat and Mass Transfer, Vol 108, pp. 1787-1801. [17] Briggs, D., and Young, E. H., 1969, "Modified Wilson plot techniques for obtaining heat transfer correlations for shell and tube heat exchangers," Chemical Engineering Progress Symposium Series, AIChE, New York, NY, pp. 35-45. [18] Kays, W. M., and London, A. L., 1984, "Compact heat exchangers." [19] Yang, C.Y., Nalbandian, H., and Lin, F.C., 2018, “Flow boiling heat transfer and pressure drop of refrigerants HFO-1234yf and HFC-134a in small circular tube,” International Journal of Heat and Mass Transfer, Vol 121, pp. 726-735. [20] Moffat, R. J., 1988, “Describing the uncertainties in experimental results,” Experimental Thermal and Fluid Science, Vol 1, Issue 1, pp. 3-17
指導教授	楊建裕 陳冠廷(Chien-Yuh Yang Kuan-Ting Chen)	審核日期	2024-7-30
推文	facebook   plurk   twitter   funp   google   live   udn   HD   myshare   reddit   netvibes   friend   youpush   delicious   baidu
網路書籤	Google bookmarks   del.icio.us   hemidemi   myshare