Earticle

초록

영어

In this paper, the effects of superheat, subcooling, evaporating, condensing temperature, cascade evaporating temperature, compression efficiency, etc. were analyzed for the optimal refrigerant charging of a R744-R717 cascade refrigeration system. Refrigerants used in the cascade refrigeration system are R744 in the low and R717 in high temperature cycle. The main results are summarized as follows : The mass flow rate ratio increases with increasing subcooling, superheating degree, compression efficiency and condensing temperature in the high temperature cycle. And the mass flow rate ratio decreases with increasing temperature difference of cascade heat exchanger and evaporating, cascade evaporating temperature. It was confirmed that the mass flow rate ratio due to superheating, subcooling, condensing, evaporating temperature, temperature difference of cascade heat exchanger, compression efficiency and etc., affects the performance coefficient of the cascade refrigeration cycle of R744 and R717, and it was found that for each of these factors, there exists a mass flow rate ratio for optimal refrigerant charging that maximizes the performance of the cascade refrigeration cycle.

목차

Abstract
1. 서론
2. 질량유량비 분석
3. 결과 및 고찰
3.1 과냉각도에 따른 영향
3.2 과열도에 따른 영향
3.3 증발온도, 캐스케이드 열교환기 온도차, 응축온도에 따른 영향
3.4 압축효율에 따른 영향
3.5 질량유량비에 따른 성능계수
3.6 질량유량비에 따른 수학적 방정식
4. 결론
References

키워드

저자

• 강동훈 [ Dong-Hun Kang | Member, is a Doctoral Course Student in the Dept. of Mechanical System Engineering, TongMyong Univ. ]
• 방동욱 [ Dong-Wook Bang | Member, is a M.S Student in the Dept. of Mechanical System Engineering, TongMyong Univ. ]
• 구학근 [ Hak-Keun Ku | Professor, Dept. of Refrigeration and Air-Conditioning Eng., TongMyong Univ. ] 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