- 學位論文
HFC-245fa冷媒最佳壓縮機的選用方式
Best Selection of Refrigerant Compressor with HFC-245fa
摘要
本研究目的為在市售壓縮機中選擇符合HFC-245fa冷媒條件運轉的規格，藉此發揮HFC-245fa系統的效益。實驗中藉由理論分析與實際壓縮系統來比對不同蒸發溫度與冷凝溫度下，製冷及製熱能力、COPL、COPH之間的差異性。研究結果顯示HFC-134a與HFC-245fa冷媒最相近。並以這二種冷媒在三種不同的冷凝器溫度7.2℃、12.2℃、17.2℃(HFC-134a)及49℃、55℃、60℃(HFC-245fa)與三種不同的蒸發器溫度35℃、45℃、55℃(HFC-134a)及80℃、92℃、103℃(HFC-245fa)，共九種狀態下(TYPE1~TYPE9)進行實際模擬試驗與量測。試驗結果顯示HFC-245fa在CAPH、CAPL、COPH、COPL為HFC-134a之74%~85%。在壓縮機方面HFC-245fa實際產生的壓縮機損秏功率為HFC-134a之110~112%，結果顯示COP整體效率可達80%，壓縮機秏功增加10%，其運轉狀態接近HFC-134a，故能選用此壓縮機換裝HFC-245fa。
並列摘要
The study intends to select from the market a compressor that meets the operation specifications of HFC-245fa refrigerant, and use the compressor to achieve effectiveness of HFC-245fa. After experiments are conducted, the study employs theoretical analysis and actual compression system to compare the difference among refrigerating and heating capacities, COPL and COPH under different evaporation temperatures and condensing temperatures. Research results show that HFC-134a refrigerant is most similar to HFC-245fa refrigerant. The study conducts actual simulation tests and measurement of these 2 refrigerants under 9 conditions (TYPE 1 ~ TYPE 9) that use 3 different condensing temperatures 7.2oC, 12.2oC, 17.2oC (HFC-134a) and 49oC, 55oC, 60oC (HFC-245fa) and 3 different evaporator temperatures 35oC, 45oC, 55oC (HFC-134a) and 80oC, 92oC, 103oC (HFC-245fa). Test results show that CAPH, CAPL, COPH and COPL of HFC-245fa are 74%~85% of those of HFC-134a. As to compressor, compressor power loss actually produced by HFC-245fa is 110~112% of that of HFC-134a. These results show that overall efficiency in terms of COP can reach as high as 80%; power loss of compressor increases by 10%; and its operating state was close to that of HFC-134a. Therefore, the compressor can be selected to load HFC-245fa.