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研究生： 劉奕堂
I-Tang Liu
論文名稱： 冷媒R-134a與潤滑油混合流體於蒸發器含油濃度量測分析
Analysis Lubricant Concentration of R-134a and Lubricant Mixture in Evaporator
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： 91
語文別： 中文
論文頁數： 56
中文關鍵詞： 冷媒含油濃度 、潤滑油
外文關鍵詞： lubricant concentration, lubricant
相關次數： 點閱：12  下載：0 
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    • 本文主要以實驗方法分析冷媒R-134a與不同濃度潤滑油混合後，在管徑1.1mm及0.8mm混合物流經蒸發器之含油量變化，分析其冷媒流量與含油濃度之關係，實驗量測含油濃度由1 ~ 5%，質量速度為200 ~ 600 kg/m2s，熱通量為10 kw/m2。
    本實驗入出口的含油濃度幾乎都會高於計算的局部油含量表示式，其改變的大小主要受到乾度和質量速度的影響，而質量速度愈小增加的量就愈大。本實驗在出口處的局部含油濃度並無預期中的減少，反而有增加的趨勢。造成這樣的結果，可能是本實驗系統的取樣裝置設計不良，由於本實驗所有的潤滑油皆會溶解於液態冷媒中，而取樣時只取到液態的混合物，並沒有取樣到上方的氣態冷媒，才會造成潤滑油濃度增加。

    This paper used experimental analysis to R-134a mixture with different concentration of lubricant pass by evaporator in diameter 1.1mm and 0.8mm micro tubes. We analyzed the relation between flow rate of refrigerant and lubricant concentration. We measured lubricant concentration from 1 ~ 5%, mass velocity from 200 ~ 600 kg/m2s and fixed heat flux in 10 kW/m2 .
    The lubricant concentration of inlet and exit of test section were almost higher than calculated local lubricant concentration correlation. Local lubricant concentration influenced of vapor quality and mass velocity. When we decreased mass velocity, the local lubricant concentration increased. The local lubricant concentration of exit did not satisfy with our expect and trend to increase.
    To cause this experimental result, it maybe not design optimum of sample device. Due to all of lubricant dissolved in liquid refrigerant and we got the sample of lubricant only included the liquid mixture of refrigerant not included the gas mixture of refrigerant, therefore the lubricant concentration increase.

    摘要-------------------------------------------------------------------------------------- i 目錄-------------------------------------------------------------------------------------- ii 表目錄----------------------------------------------------------------------------------- iv 圖目錄----------------------------------------------------------------------------------- v 符號說明-------------------------------------------------------------------------------- vii 第一章 前言--------------------------------------------------------------------------- 1 1.1 研究背景-------------------------------------------------------------------------- 1 1.2 研究目的-------------------------------------------------------------------------- 2 第二章 文獻回顧--------------------------------------------------------------------- 3 第三章 實驗方法--------------------------------------------------------------------- 13 3.1 簡介-------------------------------------------------------------------------------- 13 3.2 實驗系統-------------------------------------------------------------------------- 13 3.2.1 測試段--------------------------------------------------------------------- 13 3.2.2 冷媒循環系統------------------------------------------------------------ 14 3.2.3 水循環系統-------------------------------------------------------------- 14 3.3 實驗量測設備-------------------------------------------------------------------- 15 3.3.1 溫度測量----------------------------------------------------------------- 15 3.3.2 壓力測量----------------------------------------------------------------- 15 3.3.3 流量測量----------------------------------------------------------------- 15 3.3.4 資料擷取系統----------------------------------------------------------- 16 3.4 實驗過程-------------------------------------------------------------------------- 16 3.4.1 系統測漏----------------------------------------------------------------- 16 3.4.2 系統冷媒填充----------------------------------------------------------- 17 3.4.3 系統冷凍油填充-------------------------------------------------------- 17 3.4.4冷凍油濃度量測--------------------------------------------------------- 17 3.4.5 實驗步驟----------------------------------------------------------------- 18 3.5 資料換算-------------------------------------------------------------------------- 19 第四章 實驗結果與討論------------------------------------------------------------ 39 4.1 實驗結果--------------------------------------------------------------------------- 39 4.2 討論--------------------------------------------------------------------------------- 41 第五章 結論---------------------------------------------------------------------------- 52 參考文獻--------------------------------------------------------------------------------- 53 附錄--------------------------------------------------------------------------------------- 55

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    林建順, 2001, “冷媒R-134a與潤滑油混合流體於管內性能分析,” 中央大學機械系碩士論文.

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