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題名 | 探討電冰箱改用HFC-134a新冷媒對冷凍的熱力性能影響 |
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作者 | 尤金柱; | 書刊名 | 勤益學報 |
卷期 | 9 1992.03[民81.03] |
頁次 | 頁83-97 |
分類號 | 446.641 |
關鍵詞 | 冷凍; 冷媒; 性能; 電冰箱; 熱力; |
語文 | 中文(Chinese) |
中文摘要 | HFC-134a可能成為R-12未來的替代品用於電冰箱中的新冷媒。 CFCS(ChloroHuoro carbons)冷媒破壞大氣臭氧層(ozone layer)及增強大氣溫室效應 (greenhouse effect),對地球生態環境及人類健康造成極大的威脅,已是不容置疑 的事實。電冰箱現用之R-12冷媒勢必因世界性的冷媒管制而逐漸淘汰。本文主要 藉看國內外已發表有關HFC-134a新冷媒文獻資料,模擬替換R-12用於同一環境條 件之電冰箱冷凍循環系統,作一理論性熱力性能的影響之探討,以強化未來引進 新冷媒應用設計技術之調適能力。經由冷凍熱力性質(thermodynamiC property)計 算分析比較,由結果得知兩者之一般性能相當接近,證明直接使用R-134a於現有 R-12電冰箱系統中成為可能,唯其冷凝壓力較高、高低壓差變大,冷凝器總散熱 增加、COP性能係數減少,如欲獲得與R-12相同之冷凍能力,則必須付出較多能 源之消耗,若能稍作修改現有電冰箱之硬體設備,則新冷媒之替換可更臻完美。 |
英文摘要 | This study was based mainly on the published domestic and international researchpapers referred to HFC-134a . A simulation method of subtituting R-12 by the similar set ofenvironmental conditions was employed to make a theoretical study . In this way we hoped tobe familiar with the new refrigerant and enhance the ability to apply it in technologicaldesign once it is introduced in the future. When the results of thermodynamic property analyses were compared,it was foundthat general property of the new refrigerant was very sinilar to that of currently used in R-12refrigerator. And it was proved that direct substitution of R-134a in the R-12 refrigertor wasfeasible, however , the pressure of condenser was higher , the pressure difference becomeswider , the total heat of condenser was increased and the coefficient of performance wasredued . In the other words , to achieve the same refrigeration capeity , the one with newrefriant would consume more energy than that of R-12. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。