Earticle

초록

영어

An exergy analysis of cascade refrigeration system with R744 and R717 is presented in this paper to optimize the design and operating parameters of the system. The design for the operating parameters considered in this study include superheating and subcooling degree, cascade heat exchanger and compression efficiency, condensation and evaporation temperature in the R717 high temperature cycle and R744 low temperature cycle, respectively. The main results are summarized as follows : As the cascade evaporation temperature increases, the COP of R717 high temperature cycle increases. But the COP of R744 low temperature cycle decreases, and the COP of total cascade cycle is almost constant. As cascade evaporation temperature increase, the exergy loss in the R717 condenser and the R744 cascade heat exchanger is the largest and the lowest among all components, respectively. Therefore, in order to improve the COP of total cascade cycle and exergy efficiency() of cascade refrigeration system with R744 and R717, the exergy loss of the condenser and compressor of R717 must be reduced.

목차

Abstract
1. 서론
2. 성능 분석
3. 결과 및 고찰
3.1 성능계수의 비교
3.2 이론과 실제 성능계수의 비교
3.3 엑서지 분석
4. 결론
References

키워드

저자

• 강동훈 [ Dong-Hun Kang | Dept. of Mechanical System Engineering, Graduate School, 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