표제지
목차
기호설명 10
ABSTRACT 12
I. 서론 14
1. 연구 배경 및 필요성 14
2. 연구 목적 및 방법 15
II. 냉동 이론과 응용 16
1. 기본적인 냉동 싸이클 16
2. 냉매선도 17
3. 냉매의 상태변화 19
4. 냉동장치의 P-h 선도 계산 21
5. 냉동장치의 운전 24
1) 흡입 가스의 상태와 압축 24
2) 증발온도(압력)의 변화 26
3) 과냉각의 변화 28
III. 실험장치 및 방법 29
1. 개략도 29
2. 실험 장치의 전체 모습 30
3. 실험장치 냉동기기 배치 형태 31
1) 냉동시스템 주요부 상세 32
4. 실험방법 40
IV. 결과 41
1. 표준이론 냉동사이클 41
2. 실험장치 작동전의 상태 42
3. 저압 및 회전수 변화에 따른 냉동선도 변화 43
1) 저압 2.6bar 2400rpm 43
2) 저압 2.6bar 3000rpm일 때 44
3) 저압2.6bar 3600rpm일 때 45
4) 저압3.0bar 2400rpm일 때 46
5) 저압3.0bar 3000rpm일 때 47
6) 저압3.0bar 3600rpm일 때 48
7) 저압3.5bar 2400rpm일 때 49
8) 저압3.5bar 3000rpm일 때 50
9) 저압3.5bar 3600rpm일 때 51
10) 저압의 변화에 열량 변화 52
4. 저압 및 회전수 변화에 따른 온도변화 53
5. 성능계수, 압축비, 냉동효과, 압축일량, 응축능력, 에너지 소비 58
V. 결론 63
참고문헌 65
부록 67
Table 1. Evaporation Pressure of Refrigerant for Temperature Variation. 19
Table 2. Condaising Pressure of Refrigerant for Temperature Variation 20
Table 3. Values of Basic Parameters of Refrigeration Cycle 41
Table 4. Data of Fig. 27 43
Table 5. Data of Fig. 28 44
Table 6. Data of Fig. 29 45
Table 7. Data of Fig. 30 46
Table 8. Data of Fig. 31 47
Table 9. Data of Fig. 32 48
Table 10. Data of Fig. 33 49
Table 11. Data of Fig. 34 50
Table 12. Data of Fig. 35 51
Table 13. Quantity Heat for Low Pressure Change 52
Fig. 1. The Schematic Diagram of Refrigeration Cycle. 16
Fig. 2. Basic P-h Diagram 18
Fig. 3. Diagram of Refrigerator 18
Fig. 4. P-h Diagram of Refrigeration System. 21
Fig. 5. P-h Diagram of the Inlet Gas State and Compression. 24
Fig. 6. P-h Diagram of the Condensing Temperature Variation 25
Fig. 7. P-h Diagram for the Evaporation Temperature Variation 26
Fig. 8. P-h Diagram for the Supercooling Variation 28
Fig. 9. Schematic Diagram of Experimental Apparatus. 29
Fig. 10. Photography of Installed T-type Thermocouple Shape. 30
Fig. 11. Photography of Data Logger. 30
Fig. 12. Photography of Experiment Set-up. 31
Fig. 13. Photography of refrigeration system. 31
Fig. 14. Photography of Compressor 32
Fig. 15. Photography of Manometer 33
Fig. 16. Photography of Charge Nipple 33
Fig. 17. Photography of Condenser 34
Fig. 18. Photography of Receiver 35
Fig. 19. Photography of Accumulator or Liquid Separator. 36
Fig. 20. Photography of Evaporator 37
Fig. 21. Photography of Manual Expansion Valve 38
Fig. 22. Photography of Filter Drier 38
Fig. 23. Photography of Sight Glass 39
Fig. 24. Photography of Solenoid Valve 39
Fig. 25. P-h Diagram of Refrigeration Cycle 41
Fig. 26. Initial State of Refrigeration Equipment 42
Fig. 27. Mollier Chart at Low Pressure 2.6bar and 2400rpm 43
Fig. 28. Mollier Chart at Low Pressure 2.6bar and 3000rpm 44
Fig. 29. Mollier Chart at Low Pressure 2.6bar and 3600rpm 45
Fig. 30. Mollier Chart at Low Pressure 3.0bar and 2400rpm 46
Fig. 31. Mollier Chart at Low Pressure 3.0bar and 3000rpm 47
Fig. 32. Mollier Chart at Low Pressure 3.0bar and 3600rpm 48
Fig. 33. Mollier Chart at Low Pressure 3.5bar and 2400rpm 49
Fig. 34. Mollier Chart at Low Pressure 3.5bar and 3000rpm 50
Fig. 35. Mollier Chart at Low Pressure 3.5bar and 3600rpm 51
Fig. 36. The Temperature Variation at Low Pressure Side, 2.6bar, 3.0bar 3.5bar 57
Fig. 37. COP versus Inlet Pressure and Compressor rpm 59
Fig. 38. The Charts for Refrigeration Parameters 62
Fig. 1. Mollier Chart at 2.6bar, 2400rpm 68
Fig. 2. Mollier Chart at 2.6bar, 3000rpm 70
Fig. 3. Mollier Chart at 2.6bar, 3600rpm 72
Fig. 4. Mollier Chart at 3.0bar, 2400rpm 74
Fig. 5. Mollier Chart at 3.0bar, 3000rpm 76
Fig. 6. Mollier Chart at 3.0bar, 3600rpm 78
Fig. 7. Mollier Chart at 3.5bar, 2400rpm 80
Fig. 8. Mollier Chart at 3.5bar, 3000rpm 82
Fig. 9. Mollier Chart at 3.5bar, 3600rpm 84