自動車 에어컨用 冷媒 HFC-152a와 HFC-152a에 CF3I를 混合한 共沸 混合冷媒 特性에 關한 硏究

다국어 초록 (Multilingual Abstract)

These days, an attention of environment has been increasing all over the world. To prevent green house effect and destruction of an ozone layer, an ozone destruction potential(0DP) must be zero and a refrigerant for low global warming potential(GWP) is needed. HFC-l34a, in which hydrogen is mixed instead of chlorine is a refrigerant used for automobile conditioners and its destruction potential is ecologically zero. However, it is not considered as a perfect substitutive refrigerant as its GWP is high.
It is studied refrigerant mixtures in which HFC-l52a, HFC-152a and CF_(3)I with low GWP and zero ODP are mixed by experimentally and concluded as follows:
1. With the variation of speed of compressor outside temperature and flow rate, the heat of evaporator and compressor and coefficient of performance was varied, and influenced the air conditioner.
2. The heat of compressor with the variation of speed of compressor was increased but the heat of evaporator was almost same. Under the low speed of compressor and evaporator, cooling load was decreased in evaporator.
3. The pressure of evaporator was decreased with increasing the speed of compressor and the pressure of evaporator with the refrigerant HFC-152a was higher 24% than that of azotrope refrigerant, mixed with CF_(3)I
4. In outside temperature of 35℃, the heat of evaporator with HFC-152a was increased and required power was decreased than that with azotrope refrigerant mixed with CF_(3)I, but 40℃,the heat of evaporator was almost same and required power was increased.
5. In outside temperature of 45℃ the heat of evaporator with azotrope refrigerant mixed with CF3I was increased 20% and required power was decreased.
6. With increasing the compressor speed coefficients of performance with azotrope refrigerant CF_(3)I was increased than those of refrigerant HFC-152a.
7. When the outside temperature was 25℃ and the compressor speed was high working condition of automobile air conditioner was optimum.

목차 (Table of Contents)

• 목차 = ⅰ
• Nomenclatures = ⅲ
• List of Tables = ⅳ
• List of Figures = ⅴ
• List of Photographs = ⅹ
• ABSTRACT = ⅹⅰ
• 제1장 서론 = 1
• 1.1 연구배경 = 1
• 1.2 연구방법 및 목적 = 3
• 1.3 기대효과 = 4
• 제2장 관련이론 = 5
• 2.1 냉매의 특성 = 5
• 2.2 냉동사이클 해석 = 8
• 2.2.1 순수냉매 이론 냉동사이클 = 8
• 2.2.2 혼합냉매를 사용한 이론적 냉동사이클 = 11
• 2.3 자동차 냉방시스템 = 14
• 제3장 실험장치 = 17
• 제4장 실험방법 = 22
• 제5장 실험결과 및 고찰 = 25
• 5.1 외기 온도조건과 압축기 회전속도에 따른 압력변화 = 25
• 5.2 외기 온도조건과 압축기 회전속도에 따른 소비전력 변화 = 41
• 5.3 외기 온도조건과 압축기 회전속도에 따른 증발기열량 변화 = 49
• 5.4 외기 온도조건과 압축기 회전속도에 따른 응축기열량 변화 = 57
• 5.5 외기온도조건과 압축기 회전속도에 따른 성능계수 = 65
• 5.6 조건에 대한 비교 분석 = 73
• 제6장 결론 = 95
• Reference = 97
• Appendix = 104