Characteristices of Temperature Distribution in a Closed Space with Heat Source and Porous Horizontal Partition

J. Ocean Eng. Technol. 1999;13(Suppl DB Error: no such field):29-37.

Park, Chan-Su;Cho, Dae-Hwan;Jeon, Cheol-Kyun;

유공성 수평격판을 가진 열원이 있는 밀폐공간내의 온도분포 특성

박찬수;조대환;전철균;

목포해양대학교 기관공학부;목포해양대학교 기관공학부;목포대학교 공과대학 기계공학과;

Keywords: Velocity Profile, Temperature Profile, Supply Air Downward Angle, Horizontal Partition

핵심용어: 속도분포, 온도분포, 급기 하향각, 수평격판

Abstract

Ventilation of the marine engine room is very important for the health of the workers as well as the normal operation of machines. To find proper ventilation conditions of this engine room, numerical simulation with standard k-${epsilon}$ model was carried out. In the present study, the marine engine room is separated to two floors with porus horizontal partition and considered as a closed space with a heat source and forced ventilation ducts. The porosity of horizontal partition is found to be important. For the engine room with 2 supply ports & 2 exhaust ports, the increasing of the porosity of horizontal partition is effective to reduce the recirculation flow zone in the second floor. When the engine room is ventilated with three supply air ports & one exhaust port, the increasing of the porosity of horizontal partition is effective to reduce the recirculating flow zone in the exhaust air area, but there is a possibility of local extreme heating at the lower side of engine near bottom.