臺灣能源期刊發行

  • 創刊日期：

    102年11月30日

  • 發行所：

    經濟部能源署

  • 發行人：

    游振偉

  • 地址：

    台北市復興北路2號13樓

  • 電話：

    02-2772-1370

  • 執行單位：

    財團法人工業技術研究院

  • 地址：

    新竹縣竹東鎮中興路四段195號26館

  • 服務專線：

    03-5916006

  • 服務信箱：

    JOET@itri.org.tw

  • 總編輯：

    王漢英胡均立

  • 顧問：

    王運銘童遷祥楊日昌

  • 執行主編：

    劉子衙陳志臣

  • 編輯委員：

    方良吉王錫福李堅明李叢禎林師模馬鴻文陳介力陳希立廖芳玲廖肇寧劉文獻蕭志同顧洋(依筆畫順序排列)

:::

臺灣能源期刊論文全文

臺灣能源期刊第1卷第3期內容

出刊日期：June, 2014

題目
R-1234yf冷媒在空調和熱泵系統的性能-現況回顧
Title
An overview of the System Performance of R-1234yf Refrigerant in Air-conditioning and Heat Pump System
作者
王啟川
Authors
Chi-Chuan Wang
摘要
本文回顧R-1234yf與R-134a系統性能現有研究的差異比較。根據現有的研究，直接使用R-1234yf置換R-134a系統的性能衰退大約在0-27%，並取決於操作條件。隨著引進內部熱交換器、噴射器或膨脹器，或調整感溫式膨脹閥，性能衰退化可以舒緩，甚至可以變得與R-134a系統相若。對於蒸發器的傳熱性能，R-1234yf的與R-134a的幾乎相同，然而，在冷凝器中R-1234yf的性能明顯低於R-134a。R-1234yf的容積效率比R-134a稍低，這是因為R-1234yf有較高的摩擦壓降。對於相同的感溫式膨脹閥，用於控制同樣的過熱度，R-1234yf系統需要更進一步調整最佳化的彈簧在膨脹閥內的鬆緊程度。
關鍵字
R-1234yf、R-134a、系統性能、熱傳導、熱泵、空調系統
Abatract
In this study, an overview of the system performance of R-1234yf in association with R-134a is carried out. Based on the existing researches, it is found that the COP and heat capacity of R-134a system may suffer from direct drop-in replacement of R-1234yf. The deterioration of system performance is around 0~27% depending on the operational conditions. With the introduction of internal heat exchanger, ejector, expander, or adjustment of the thermal expansion valve, the deterioration can be relieved., and a comparable performance becomes likely. For the heat transfer performance in the evaporator, R-1234yf is almost comparable with that of R-134a. However, the performance in the condenser is inferior to R-134a. The phenomenon may be quite severe for a water cooled condenser since the dominant thermal resistance may fall in the refrigerant side. The volumetric efficiency of R-1234yf system is slightly lower than that of R-134a due to higher frictional pressure drop of R-1234yf. For the same thermal expansion valve for controlling the suction superheat, it appears that higher suction superheat may occur for R-1234yf. Hence further adjustment of spring in the valve is required for optimization.
Keywords
R-1234yf, R-134a, system performance, heat transfer, heat pump, air-conditioning
全文下載/Download