Earticle

초록

영어

This parametric sensitivity study examines the impact of key operating variables on the efficiency of a precooled Linde cycle for nitrogen liquefaction, with particular emphasis on refrigerant mass flow rate, condensing temperature, and cooling power. The investigation covers condensing temperatures from 20°C to 45°C and refrigerant mass flow rates from 0.1 to 0.9 g/s. Three refrigerants R290, R134a, and R410a are analyzed to evaluate their effects on the figure of merit (FOM) and the liquid yield (proportion of gas liquefied). Nitrogen is used as the permanent gas to benchmark system performance. The results show that lower condensing temperatures improve the liquid yield, especially at higher refrigerant mass flow rates, although they also increase the work required by the Linde compressor. Among the refrigerants tested, R290 consistently delivers the highest liquid yield and FOM (27–37%), despite requiring more auxiliary compressor work, due to its higher latent heat and greater cooling effect. R134a is the most energy‑efficient in terms of compressor work but yields the lowest liquid production. The choice of refrigerant in the auxiliary cooling circuit is therefore a pivotal factor influencing the overall performance of the precooled Linde cycle. This research provides practical insights for optimizing operating parameters and contributes to the development of more efficient precooled Linde systems.

목차

Abstract
1. INTRODUCTION
2. DESCRIPTION OF PRECOOLED LINDE CYCLE
3. THERMODYNAMIC MODELING OF SYSTEMS
3.1. Energy Balance for the Precooled Linde System
3.2. Refrigeration (Cooling) Cycle Modeling
4. RESULTS AND DISCUSSION
4.1. Refrigeration Cycle Performance (Auxiliary Cooling Circuit)
4.2. Linde Cycle Performance and Overall System Efficiency
5. CONCLUSIONS
REFERENCES

키워드

저자

• B. Litouche [ Mechanical Engineering Department, Institute of Science and Technology, University of Abdelhafid Boussouf, Mila, Algeria ] Corresponding Author
• B. Rebai [ Civil Engineering Department, Faculty of Technology, University of Abbés Laghrour, Khenchela, Algeria. ]
• A. Bendjaghlouli [ cMechanical Engineering Department, Institute of Science and Technology, University of Abdelhafid Boussouf, Mila, Algeria ]
• A.Touahria [ Mechanical Engineering Department, Institute of Science and Technology, University of Abdelhafid Boussouf, Mila, Algeria ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537