Dohoon Kwon, Jiho Park, Hankil Yeom, Sangyoon Chu, Jongwoo Kim, Sehwan In, Yongju Hong
언어
한국어(KOR)
URL
https://www.earticle.net/Article/A494008
※ 기관로그인 시 무료 이용이 가능합니다.
※ 학술발표대회집, 워크숍 자료집 중 4페이지 이내 논문은 '요약'만 제공되는 경우가 있으니, 구매 전에 간행물명, 페이지 수 확인 부탁 드립니다.
4,000원
원문정보
초록
영어
Pneumatically driven Gifford-McMahon(G-M) cryocoolers offer the advantage of system miniaturization by replacing the conventional Scotch-Yoke mechanism with a pressure-driven displacer. However, because the displacer's motion is kinematically unconstrained, designing the system requires a coupled analysis of the thermo-fluid dynamics and the dynamic motion of the displacer. In this study, a one-dimensional numerical model is developed to predict the performance of a pneumatically driven G-M cryocooler. The model comprehensively calculates the mass flow rate through the valves, heat transfer and pressure drop within the regenerator, and the dynamic behavior of the displacer to derive the PV work and the net cooling capacity at 80 K. A parametric study is conducted over 49 operating conditions by varying the drive stem diameter (10–40 mm) and the operating frequency (1–4 Hz). The numerical results demonstrate that these parameters critically govern the displacer's dynamic response and the resulting cooling performance. Under the given conditions, the maximum cooling power is achieved with a drive stem diameter of 30 mm and an operating frequency of 4 Hz. The results suggest that while higher frequencies theoretically yield greater cooling power, practical cryocooler design must strictly incorporate the compressor's performance curves, as increased mass flow rates inevitably degrade the supply pressure ratio.
목차
Abstract 1. 서론 2. 수치해석 모델 3. 계산 결과 및 고찰 4. 결론 ACKNOWLEDGMENT REFERENCES
Dohoon Kwon [ Department of Energy Storage Systems, Research Institute of Carbon-neutral Energy Machinery, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea ]
Corresponding Author
Jiho Park [ Department of Energy Storage Systems, Research Institute of Carbon-neutral Energy Machinery, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea ]
Hankil Yeom [ Department of Energy Storage Systems, Research Institute of Carbon-neutral Energy Machinery, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea ]
Sangyoon Chu [ Department of Energy Storage Systems, Research Institute of Carbon-neutral Energy Machinery, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea ]
Jongwoo Kim [ Department of Energy Storage Systems, Research Institute of Carbon-neutral Energy Machinery, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea ]
Sehwan In [ Department of Energy Storage Systems, Research Institute of Carbon-neutral Energy Machinery, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea ]
Yongju Hong [ Department of Energy Storage Systems, Research Institute of Carbon-neutral Energy Machinery, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea ]