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전치 가이드 베인 설치에 따른 열회수 보일러 입구 온도 최적화
이수윤(Sooyoon Lee),안준(Joon Ahn),신승원(Seungwon Shin) 한국전산유체공학회 2008 한국전산유체공학회 학술대회논문집 Vol.2008 No.-
Diverging channel from gas burner exit to the inlet section of Heat Recovery Steam Generator (HRSG) has been re-designed for 1 ㎿ system. To improve the uniformity in velocity and temperature distribution of existing design(Case A and B) of 300 ㎾ HRSG system, two additional test geometries have been chosen for the numerical simulation. At first, gas burner exit section has been centered to the inlet section of boiler(Case C) and uniformity has been improved considerably. Secondly, the diverging channel length can be further reduced for compact geometry with new guide vane design (Case D and E). Proposed design shows overall improvement in uniformity in velocity and temperature distribution compared to existing one.
〈학술논문or 기술논문〉 핀튜브 증발기 내부에서 핀튜브 모듈과 측 벽면 간격에 따른 열전달 성능 수치해석 연구
이수윤(Sooyoon Lee),안준(Joon Ahn),신승원(Seungwon Shin) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Recently, Heat Recovery Steam Generator(HRSG) is widely used in various commercial places such as hospital, restaurant, and sauna for steam generation equipment due to increasing demand on steam usage for disinfection or fumigation. In HRSG, finned tube type evaporator is usually utilized to enhance heat transfer performance for higher steam generation. Most previous research so far has been focused on heat transfer enhancement aspect from geometry of each individual fin such as pitch distance, length, and thickness. In current study, we have tried to identify the effect from gap size between tube module and side wall on overall heat transfer. We found out that the gap size has considerable effect on total heat transfer rate. We also observed that both heat transfer performance and pressure drop is decreasing with increasing gas size.
전치 가이드 베인 설치에 따른 열회수 보일러 입구 온도 최적화
이수윤(Sooyoon Lee),안준(Joon Ahn),신승원(Seungwon Shin) 한국전산유체공학회 2009 한국전산유체공학회지 Vol.14 No.3
Diverging channel from gas engine exit to the inlet section of Heat Recovery Steam Generator (HRSG) has been re-designed for 1 ㎿ system. To improve the uniformity in velocity and temperature distribution of existing design(Case A and B), two additional lest geometries have been chosen for the numerical simulation. At first, gas burner exit section has been centered to the inlet section of the boiler(Case C) and uniformity in velocity and temperature distribution has been improved considerably. Secondly, the diverging channel length can be further reduced to compact geometry with new guide vane design (Case D and E). Proposed design shows overall improvement in uniformity in velocity and temperature distribution compared to existing one.
판 사이 간격에 따른 판형 열교환기 성능에 관한 수치해석 연구
이수윤(Sooyoon Lee),안준(Joon Ahn),신승원(Seungwon Shin) 한국전산유체공학회 2009 한국전산유체공학회 학술대회논문집 Vol.2009 No.4
Plate Heat Exchnager(PHE) has recently become widely adopted for cogeneration systems owing to its small installation space and high thermal efficiency. The gap between plates can be changed depending on its assemble type, i.e. gasket or blazing. The gap is known to affect thermal efficiency and working pressure drop in PHE with complicated geometrical features. Numerical simulation techniques have been developed to deal with PHE with complex configuration of chevron plates. The present study is aiming at identifying the gap effect on pressure drop and thermal efficiency of the PHE. The numerical simulation results show that the gap has relatively large effects on working pressure drop than thermal efficiency in performance of PHE.