臺灣博碩士論文加值系統

現在的冷氣機,大型電冰箱,汽車空調等所需灌入的冷媒大都為R-22,因為它的溫室效
應潛能值(Global Warming Potential,GWP:以CFC11的GWP數值為1.0,來評估其它冷媒的溫
室效應影響)與臭氧層破壞潛能(Ozone Depletion Potential,ODP:以CFC-11冷媒臭氧層破
壞能力數值定為1.0,其它冷媒以此值作為相對值,來評估其對臭氧層破壞的能力)都很大,
不符合現今最在意的環保要求,有鑒於此,需要開發新的環保冷媒,而R-290(丙烷)的ODP與G
WP機幾乎為零,因此,選選擇它當冷媒,以研究將它運用於現在的機器其性能表現如何,以決
定是否有可繼續發展的價值 實驗裝置是一自行匹配的冰水機組,探討鹵水(負荷水)流
率,鹵水入口溫度,冷卻水流率,冷卻水入口溫度,毛細管長度,毛細管口徑,冷媒填充量等七
個操作變因對系統高壓,系統低壓,毛細管壓降,過冷度,過熱度,壓縮機出口溫度,冷凍能力
,輸入壓縮機的功率,COP等九個數值的影響 實驗結果顯示,冷卻水入口溫度上升時,系
統高壓,系統低壓,毛細管壓降,壓縮機出口溫度,壓縮機所需功率會變大;鹵水入口溫度上
升時,系統高壓,低壓過冷度,壓縮機出口溫度,冷凍能力,輸入呀縮機功率會變大

The reduction in chlorofluorocarbon(CFC) and hydrochlorofluorocarbon
(HCFC) production and the scheduled phase-out of these ozone-depleting re
fri- gerants stimulated the development of environmentally safe refrigera
nts for use in heat pump , water chillers , air conditioners , and refriger
ators . The paper presents a performance evaluation of the refrige
rator using R- 290(propane) as refrigerant . The effects of the inle
t temperrture and flow rate of cooling-water and of the loading-water , the
inside diameter and length of the capillary tubes , and the amount o fref
rigerant on the high and low pressure- s of the system , pressure drop in the
capillary , superheating , subcooling , co- oling capacity , the work of the
compressor , and the COP . The result of the experiment
shows that it is acceptable to use R-290 as a substitutive refrigeran
t . However , there are still some technical problems of this potential ref
rigerant for us to be solved the future .