- 學位論文
汽車空調系統使用HC-600a冷媒之性能評估
The Performance Evaluation of Automotive Air Conditioning System Uses HC-600a Refrigerant
摘要
本研究針對汽車空調系統換裝HC-600a冷媒之性能評估之研究。研究使用汽車空調模擬器作為實驗設備，並參考CNS 14464與CNS 7897規範所設定，研究探討系統的蒸發口溫度、壓縮比、冷凍效果、性能係數、能源效率。首先選擇汽車空調系統HFC-134a冷媒最佳充填量，以400 g、500 g、550 g、600 g與650 g充填實驗，實驗以蒸發器出口溫度、壓縮比、冷凍效果、性能係數、能源效率進行判斷，實驗以500 g冷媒的蒸發器出口溫度9.9 ℃、壓縮比6.4、冷凍效果146 kJ/kg、性能係數3.09與能源效率3.25最佳。HC-600a冷媒充填以HFC-134a冷媒500 g的30 %、35 %、40 %與50 %進行1hr長時間運轉實驗並選擇最佳HC-600a冷媒充填量。實驗結果得知在HC-600a冷媒35 %充填量比其他HC-600a冷媒35 %、40 %與50 %來的較佳，在與HFC-134a冷媒500 g進行比較分析其壓縮比低42.9 %、冷凍能力高49.12 %、性能係數高35.2 %與能源效率44.57 %。在選擇最佳HC-600a冷媒與HFC-134a冷媒充填量後，進行轉速實驗與環境負載實驗測試。轉速實驗以1000 rpm - 1800 rpm - 3000 rpm進行，實驗結果1000 rpm時，HC-600a冷媒壓縮比低於52.6 %、冷凍能力高於51.7 %、性能係數高於32.7 %及能源效率32.73。3000 rpm 時，HC-600a冷媒壓縮比低於28.79 %、冷凍能力高於49.71 %、性能係數高於41.9 %及能源效率41.8 %。環境負載實驗以30 ℃ - 35 ℃ - 40 ℃ - 45 ℃。在45 ℃時，HC-600a冷媒壓縮比低於46.66 %、冷凍能力高於49.7 %、性能係數高於93.84 %及能源效率37.8。在40 ℃時，HC-600a冷媒壓縮比低於45.73 %、冷凍能力高於48.6 %、性能係數高於37.04 %及能源效率39.4。在30 ℃時，HC-600a冷媒壓縮比低於45.2 %、冷凍能力高於47.3 %、性能係數高於38.23 %及能源效率46.11。本研究探討結果，可評估HC-600a冷媒直接換裝HFC-134a冷媒數據參考，有助於未來使用碳氫冷媒運用在汽車空調之研究。
並列摘要
This study focuses on the evaluation of the performance of replacing HC-600a refrigerant in automotive air conditioning systems. Study the use of automobile air conditioning simulator as experimental equipment, and refer to the specifications of CNS 14464 and CNS 7897 to study the temperature and compression ratio of the evaporator of the system. First, select the optimal refrigerant filling amount of the automobile air conditioning system HFC-134a, 400 g, 500 g, 550 g, 600 g and 650 g filling experiments. The experiment is judged by the evaporator outlet temperature, compression ratio, refrigerant effect , coefficient of performance, and energy efficiency ratio. The experiment uses 500 g refrigerant evaporator outlet temperature of 9.9 ° C and compression ratio of 6.4, The refrigerant effect is 146 kJ / kg, the coefficient of performance is 3.09 and the energy efficiency ratio is 3.25. The HC-600a refrigerant is filled with 30 %, 35 %, 40 % and 50 % of HFC-134a refrigerant 500g for 1-hour continuous operation experiment and the best HC-600a refrigerant charge is selected. The 35 % filling volume is better than other HC-600a refrigerants 35 %, 40 % and 50 %. Compared with HFC-134a refrigerant 500 g, the compression ratio is 42.9 % lower, the refrigerant effect is 49.12 % higher, the performance coefficient is 35.2% higher and energy efficiency ratio is 44.57 %. After selecting the best HC-600a refrigerant and HFC-134a refrigerant charge, the speed test and environmental load test were carried out. The speed test is conducted at 1000 rpm-1800 rpm-3000 rpm. At 1000 rpm, the HC-600a refrigerant compression ratio is below 52.6 %, the refrigerant effect is above 51.7 %, the coefficient of performance is 32.7 % higher and energy efficiency ratio is 32.73 %. The compression ratio of 3000 rpm HC-600a refrigerant is lower than 28.79 %, the refrigerant effect is higher than 49.71 %, the coefficient of performance is higher than 41.9 % higher and energy efficiency ratio is 41.8 %. Environmental load test is based on 30 ℃ -35 ℃ - 40 ℃ -45 ℃. At 45 ℃, The compression ratio of HC-600a refrigerant is lower than 46.66 %, the refrigerant effect is higher than 49.7 %, the coefficient of performance is higher than 93.84% and energy efficiency ratio is 37.8 %. At 40 ° C, the compression rate of HC-600a refrigerant is lower than 46.66 %, the refrigerant effect is higher than 49.7 %, the coefficient of performance is higher than 44.4 % and energy efficiency ratio is 39.4 %.At 30 ℃, the compression rate of HC-600a refrigerant is lower than 45.2 %, the refrigerant effect is higher than 47.3 %, the coefficient of performance is higher than 38.23 % and energy efficiency ratio is 46.11 %. The results of this study can be used to evaluate the data reference for directly replacing HC-600a refrigerant with HFC-134a refrigerant, which will help in future research on the use of hydrocarbon refrigerants in automotive air conditioning.