家用冰箱系統換裝碳氫冷媒之性能研究

Investigation of domestic refrigerator Performance by Retrofitting to Hydrocarbon Refrigerant

王偉儒(Wei-Ru Wang)

指導教授 ： 卓清松

國立臺北科技大學/機電學院/冷凍空調工程系所/碩士(2005年)

https://doi.org/10.6841/NTUT.2005.00291

摘要

隨著蒙特婁議定書以及京都議定書的實施，世界各國對於環境保護的重視與日俱增，針對環保議題上更是不遺餘力的推動。而溫室氣體排放量的減少為目前世界各國因應全球暖化制訂推行的重點之ㄧ。目前常用的替代冷媒R-134a也是6種管制的溫室氣體之ㄧ，未來可預期的將受到管制或禁用。
本文針對原使用R-134a冷媒家用冰箱以R-600a / R-290混合比例各為50%之碳氫冷媒置換取代之，重點在於探討換裝碳氫冷媒後的家用冰箱各種相關性能之表現，實驗中以改變蒸發器負載以及碳氫冷媒之充填量，將所量測之數據資料與原使用R-134a冷媒之家用冰箱系統作比較與分析。
實驗結果顯示在沒有改變任何元件及更換冷凍潤滑油下，將一個容量440L的家用冰箱以90克之碳氫冷媒取代其原有150克之R-134a冷媒時，整體的冰箱性能參數表現比原使用R-134a為製冷劑之冷凍循環性能表現更為優異; 除了冷凍庫的溫度下拉速度提升、冷凍能力大幅度增加以及冷凍庫內溫度較低等優點外，其平均消耗功率降低可節省約4.4%左右，冷媒充填量亦可大幅減少約40%左右。由上述之優異表現來看，碳氫冷媒無論是在環保方面或是性能方面確實有足夠的能力作為取代置換R-134a冷媒的另一種選擇。

關鍵字

碳氫冷媒 ； R-600a/R-290混合冷媒 ； 家用冰箱 ； 溫室效應

並列摘要

With implementation of Montreal Protocol and Kyoto Protocol, environmental protection is increasingly recognized by many countries of the world. Those countries make every endeavor to get environmental protection issues moving forward. One of the key activities to deal with global warming is to reduce emissions of greenhouse gases. The current alternative refrigerant R-134a is also one of six greenhouse gases. It expected that R-134a will be restrained or banned in the near future.
This dissertation is to study performance of home refrigerator after conversion from R-134a to hydrocarbon refrigerant (R-600a / R-290 blend, 50/50 mixture by weight). Experimental data are analyzed for different refrigeration loads with various refrigerant charges. Comparison of refrigeration performance is conducted when it is charged with hydrocarbon refrigerant vs. R-134a.
A refrigerator with 440 L capacity is used as a testing facility. All elements of the refrigerator and refrigeration oil are not changed during the whole experiment process. Experimental results show that performance is better when it is charged with 90 grams of hydrocarbon refrigerant instead of 150 grams R-134a. It is found that pull down rate of temperature is improved; refrigeration capacity increases significantly with lower freezer temperature. Power consumption is saved by 4.4% and refrigerant charge is reduced by 40%. From our study, to replace R-134a with a hydrocarbon refrigerant is expected to be a good alternative either from environmental protection or refrigeration performance perspective.

並列關鍵字

hydrocarbon refrigeranthydrocarbon refrigerant ； R-600a/R-290 blend ； domestic refrigerator ； global warming

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