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CFC-대체냉매와 스크롤압축기를 사용한 냉동시스템 성능해석
박희용,박경우,Pak, H.Y.,Park, K.W. 대한설비공학회 1995 설비공학 논문집 Vol.7 No.3
A performance analysis of refrigeration system using the HFC-134a and scroll compressor is performed numerically. The refrigeration system mainly consists of various standard components such as heat exchanger, compressor, and expansion device. The model for heat exchanger performance is based on a tube-by-tube method which is analyzed separately by considering the cross-flow heat transfer with the outdoor air flow and pressure drop. Compressor is used the scroll-type compressor which has many merits such as high efficiency, low noise and vibration, and small in size. Short-tube is included as an expansion device. Vapour and liquid line are also considered for the performance analysis of refrigeration system. Using the modeling of various components of refrigeration system, a performance comparison of CFC-12 and HFC-134a is performed numerically for the various outdoor air temperature and various values of short-tube diameter. As the results of this study, the refrigeration system performance decreases as the outdoor air temperature increases. And the optimum short-tube diameter based on COP is 1.37mm for this system.
Adenoid Cystic Carcinoma of the Submandible in a 56-Year-Old Woman
박희용,조정효,손창규,조종관,Park, Hee-Yong,Cho, Jung-Hyo,Son, Chang-Gue,Cho, Chong-Kwan The Society of Internal Korean Medicine 2005 大韓韓方內科學會誌 Vol.26 No.4
연구목적 : 선양낭성암은 모든 두경부 종양에서 불과 1% 미만의 희소암으로, 본 논문에서는 하악 선양낭성암 기원의 간에 전이성 거대 종양을 가진 증례를 통해 선양낭성암에서의 한방 치료의 유효성평가와 함께 이에 대한 계속적인 연구를 유도해내는 계기로 삼고자 한다. 연구방법 : 본 연구에서는 한약물치료, 침치료, CT검사 및 혈액학적 검사를 포함한 모든 치료와 검사결과를 추적 조사하였다. 치료로 청간탕과 화침법을 사용하였으며, 청간탕은 1일 3회 복용, 화침은 월 1회 시술하였다. 또한, 혈액학적 검사는 월 1회 하였으며, CT검사는 19개월간의 치료기간 중 2회에 걸쳐 수행되어졌다. 연구결과 : 재검사시의 CT소견과 내원당시의 CT소견을 비교하였을 때, 큰 변화가 없이 잘 유지하였으며, 비록 일부의 혈액학적 검사소견이 약간 악화되었지만, 환자의 주증상은 빠르게 경감되었다. 결론 : 본 증례는 진행성 선양낭성암 환자에게서 한방치료가 삶의 질 개선과 생존을 향상을 위한 고식적 목적의 치료에 유용하게 사용되어질 수 있는 가능성을 제시해 준다.
박희용,박경우,이주형,Pak, H.Y.,Park, K.W.,Lee, J.H. 대한설비공학회 1995 설비공학 논문집 Vol.7 No.3
The interaction of laminar mixed convection and surface radiation in a two-dimensional channel with an array of rectangular blocks is analyzed numerically. Three blocks are maintained at high temperature and the other bottom and top horizontal walls are insulated. Discrete ordinate method(DOM) is introduced to analyze the radiative heat transfer. The effects of the variations of Reynolds number and channel specifications on the heat transfer characteristics are investigated. The average Nusselt numbers along the block surfaces are correlated and presented in terms of Reynolds number and dimensionless geometric parameters such as the block spacing, height and channel spacing. For the conditions considered in this study, average Nusselt numbers along the block surfaces are strongly influenced by the channel spacing and Reynolds number but weakly influenced by the block spacing and block height.
박희용,박경우,Pak, H.Y.,Park, K.W. 대한설비공학회 1994 설비공학 논문집 Vol.6 No.3
The Combustion gas behavior induced by fire in a building is numerically investigated. The typical building for this analysis is partially divided by a vertical baffle projecting from the ceiling. The solution procedure includes the low Reynolds number ${\kappa}-{\varepsilon}$ model for the turbulent flow and the discrete ordinates method is used for the calculation of radiative heat transfer equation. The effects of the location and size of fire source and baffle length on velocity and temperature distributions, species mass fraction and flame location are analyzed. As the results of this study, it is found that the case when the fire source is located at the vertical wall is more dangerous than at the bottom wall in view of the combustion products and flame location. It is also found that the radiation effect cannot be neglected in analyzing the building in fire.
캐비티내에서 표면복사를 고려한 2차원 층류 자연대류 열전달
박희용,박경우,한철희,Park, H.Y.,Park, K.W.,Han, C.H. 대한설비공학회 1992 설비공학 논문집 Vol.4 No.3
A Numerical study on two-dimensional laminar natural convection with and without surface radiation in fully or partially open square cavity was performed. The cavity has one vertical heated wall facing a vertical opening and two horizontal insulated walls. The pressure boundary condition was applied to the opening instead of the velocity boundary condition. The results of this study showed that the increase of partition length decreased the convective and the radiative Nusselt numbers. It was also found that the increase of wall emissivity decreased the convective Nusselt numbers but increased the radiative Nusselt numbers.
박희용,Park, Hui-Yong 한국전자통신연구원 1986 전자통신 Vol.8 No.3
ETRI-NET(ETRI Local Area Network)은 종합 정보통신 시스팀 기술개발 및 연구소 업무 자동화를 위해서 한국전자통신 연구소에 설치 운용중에 있는 광대역 근거리 통신망이다. 본고에서는 ETRI-NET의 시스팀 구성, 주요장비, 장비 설치현황, LAN 이용방법, 타 network과의 접속 등에 관해서 기술한다.
학회순례 - 71년 창립, 회원 3천3백여명 규합 '공기조화냉동공학회'
박희용,Park, Hui-Yong 한국과학기술단체총연합회 1999 과학과 기술 Vol.32 No.7
1971년 9월 공기조화, 냉동, 위생, 환경과 각종 설비에 관한 학문적 연구와 기술발전을 위해 창립한 공기조화냉동공학회는 현재 3천3백여명이 똘똘 뭉쳐 모범적으로 학술활동을 펼치고 있다. 해마다 학회지 6회, 논문집 6회, 영문논문집 2회를 발간하는 등 96년에는 창립 25돌을 맞아 '온돌'을 주제로 국제학술대회를 열었으며 30돌인 2001년에도 국제학술대회 유치를 계획하고 있다.