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주상현(S.H. Joo),이영수(Y.S. Lee),박기호(G.H. Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
In this study, optimal design and test of flat-plate heat pipe were carried out in order to improve both thermal response and surface temperature uniformity of heating plate. Experimental results show that the thermal response of flat-plate heat pipe is faster than that of a conventional heating type ones along with less weight and cost. The surface temperature uniformity is also improved.
안찬솔(C.S. Ahn),김정엽(J.Y Kim),주상현(S.H. Joo),김지석(J.S. Kim) 한국전산유체공학회 2013 한국전산유체공학회 학술대회논문집 Vol.2013 No.5
In high-rise commercial buildings, the smoke that occurs in case of a fire tends to be spread rapidly to the horizontal and vertical direction due to the structural characteristics of the buildings. In particular, since the smoke spread to evacuation stairwells and elevator shafts results in the toll of lives, “Design Guidelines for Smoke Control System of Special Evacuation Stairwell and Lobby” of NFSC 501A was proposed in Korea as one of fire safety standards to prevent the penetration of the smoke into the above mentioned areas. Towards this end, the vestibule pressurization method was largely used in the past, but the stairwell pressurization method is introducing in recent years. This study attempted to analyze whether air egress velocity suitable for the standards is secured, targeting the actual buildings designed with sandwich type ventilation system through numerical analysis. For this, a real-size model for numerical analysis was made by measuring the floor plan, airflow, pressure and flow area of any floor in a fire, and velocity to prevent smoke backflow was analyzed.