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친수성 표면처리가 수평관 외벽의 증발열전달에 미치는 영향
박노성,황규대,강병하,정진택 대한설비공학회 2000 설비공학 논문집 Vol.12 No.5
Evaporation heat transfer characteristics have been investigated experimentally when distilled water is sprayed on the outside wall of horizontal tubes in a evaporator. This problem is of particular interest in the design of evaporator of an absorption system. Hydrophilic surface treatment was employed to increase the wettability on copper tubes. The results indicate that evaporation heat transfer with hydrophilic tubes is shown to be 25-44% higher than that with bare tubes at evaporation pressure of 31.8 Torr(evaporation temperature$ 30^{\circ}C). Evaporation heat transfer rates of hydrophilic treatment tubes are improved substantially, comparing with those of conventional copper tubes in the wide range of operating parameters, such as water inlet temperatures, water mass flow rates and evaporation pressures.
국내 건설산업의 원하도급자간 상생협력 인식도에 관한연구
박노성,김한수,Park, No-Seong,Kim, Han-Soo 한국건설관리학회 2009 한국건설관리학회 논문집 Vol.10 No.5
고도 성장기를 지난 한국경제와 힌국기업은 더 큰 도약을 이끌 새로운 패러다임을 고민해야 하는 시점에 서 었다. 최근 일반건설업과 전문건설업의 상생협력이 중요한 화두로 떠오르는 시점에서 상생협력의 특징을 이해하는 것은 중요한 과제이다. 본 논문의 목적은 주요 상생협력요소를 중심으로 일반건설업과 전문건설업의 상생협력에 대한 인식의 주요 특징을 각 주체별 분석과 상호 비교 분석을 통해 도출하는데 있다. 이를 통해 각 주제가 상생협력에 대한 어떠한 공감대 또는 비공감대를 형성하고 있는지 파악할 수 있고 이는 상생협력을 위한 기업의 전략수립이나 정부의 정책 수립을 위해 유용하게 활용될 수 있다. Mutual cooperation between general and specialty contractors for win-win business has recently risen as a buzz word in Korea construction industry. For sustainable mutual cooperation, it is critical to achieve a better understanding of the extent to which general and specialty contractors share critical factors of mutual cooperation. The objective of this study is to identify and discuss key characteristics of perceptions towards mutual cooperation between general and specialty contractors. Key factors for mutual cooperation were identified through a questionnaire survey and statistical tests, and consensus or disagreement as to critical factors of mutual cooperation were identified and discussed.
최적화된 집적 유한 차분법을 위한 내재적 시간전진 기법의 개발
박노성(N.S.Park),김재욱(J.W.Kim),이덕주(D.J.Lee) 한국전산유체공학회 1998 한국전산유체공학회 학술대회논문집 Vol.1998 No.-
Optimized high-order compact(OHOC) schemes were proposed, which have high spatial order of truncation and :resolution to simulate the aeroacoustic problems due to unsteady compressible flows. Generally, numerical schemes are categorized explicit or implicit by time-marching method. In this research, OHOC differences which were developed wi th explicit time-marching method is used to have implicit formulation and the implicit OHOC differences result in block hepta-diagonal matrix. This paper presents the comparisons between the explicit and implicit OHOC schemes wi th a second order accuracy of time in the 2-d linear wave convection problem, and between the explicit OHOC scheme of 4th-order accuracy in time and the implicit OHOC scheme of 1st-order accuracy in time for the 1-d nonlinear wave convection problem. With these comparisons, the characteristics of implicit OHOC scheme are shown in the point of CFL number.