Earticle

초록

영어

The operating parameters considered in this study include evaporating and condensing temperature, degree of subcooling and degree of superheating. in R744-R717 cascade refrigeration system and R744 two-stage compression refrigeration system with the range of low temperature -50℃∼-30℃. The coefficient of performance(COP) of R744-R717 cascade refrigeration system is about 16∼20% greater than that of R744 two-stage compression refrigeration system in the range of evaporation temperature of -50℃∼-30℃. R744 two-stage compression refrigeration system is unstable because its coefficient of performance changes significantly depending on the evaporating temperature and total compression work, and compression efficiency decreases. In this case, not efficient for long-term use. Whereas R744-R717 R744-R717 is a cascade refrigeration system using eco-friendly refrigerants. And this system is a high-efficiency refrigeration system that performs well even under various operating conditions. This is why it can be configured by selecting a refrigerant suitable for the high temperature side and the low temperature side.

목차

ABSTRACT
1. 서론
2. 성능 분석
2.1 R744용 2단압축 1단팽창식 냉동시스템
2.2 R744-R717용 2원 냉동시스템
3. 본론
3.1 증발온도의 영향
3.2 과열도의 영향
3.3 응축온도의 영향
3.4 과냉각도의 영향
3.5 압축효율의 영향
4. 결론
References

키워드

저자

• 천상철 [ Sang-Cheol Cheon | Member, Professor, Dept. of Smart Farm Agricultural and Fisheries Welfare, Hwashin Cyber University ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국기계항공기술학회지(구 한국기계기술학회지) [Journal of the Korean Society of Mechanical and Aviation Technology ]

• 간기

  격월간

• pISSN

  1229-604X

• eISSN

  2508-3805

• 수록기간

  1999~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 550 DDC 620