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박명식,이재헌,안강호,김정호,Park, M.S.,Lee, Jae-Heon,Ahn, K.H.,Kim, J.H. 대한설비공학회 1993 설비공학 논문집 Vol.5 No.1
A numerical investigation has been carried out for the two-dimensional flow and pressure characteristics in a clean room equipped with two kinds of filters and four access panels. The distributed pressure resistance concept was applied to describe the momentum loss in filters and access panels. As a result, the velocity profile in the clean room became rather smooth by the presence of access panels. Furthermore, the average pressure drop of each access panel reached the same value so that the ratio of the flow rate should be the same at any zone. The closing of an access panel with maintaining the other access panels being opened had influenced on the velocity distribution in lower two thirds of left half space of the clean room.
공동주택 욕실샤워수전 온도편차 개선을 위한 실험적 연구
박명식(M. S. Park),이대우(D. W. Lee),류호열(H Y. Ryu),차광석(K. S. Cha),엄경섭(K. S. Eom) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.11
Recently bathrooms became high class because of the tendency of well-beings. All the materials are supplied by brand new concept ones but functions are still backward. For example when using the shower head for taking a shower, simultaneously somebody flush water after use of WC then people in shower booth will be surprised by dint of sudden hot water supply. Wash-basin and bath head, another head in the kitchen, laundry head etc, can also affect to the shower head with hot water supply temperature. This paper describes results of recent laboratory tests on a variety of common hot water distribution piping sizes and types under a variety of pipe system type, flow rates, temperatures and environmental conditions. One of the results is that when using 15㎜ pipe system and 10mm pipe system with themostat head diameter of pipe is independent on temperature difference from shower head.