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과도수리현상 해석과 실증을 통한 펌프장 안정성 확보방안
라병필(Beyong-pil Ra),김진만(Jin-man Kim),박종호(Jong-ho Park),김경엽(Kyung-yup Kim) 한국유체기계학회 2004 유체기계 연구개발 발표회 논문집 Vol.- No.-
Water supply facilities are recently getting larger according as domestic waterworks become multi - regional water supply system. Large water supply facilities generally consist of the intake pumping station, water treatment station and water supply & distribution facilities. Although pumping stations and pipeline systems are used to pump up water, it often happens pipeline damage and flooding accident by the water hammer. As a result of this study, a pumping station is guaranteed by the computer simulation and field test analysis. Therefore these are contributed safety operation in pumping station through adjustment of the pumping station safety plan, air valve and valve closing time.
관로계통 및 가압펌프장 수격에 따른 최적 안정성 확보방안
라병필(Beyong-pil Ra),박종호(Jong-ho Park) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-
The thesis is performed to find out the stability of Water-hammer that is happened when additional water needs demanded. At first, the water supply construction project is planned to supply 6,000 m3/day through 179㎞ pipeline. But additional demand 0,200 m3/day) happened from Cheong-Ra Water reservoir. In this situation, Air-chamber(4 m3) & Vacuum breaker valve(Φ100 ㎜) are needed to prevent Water-hammer. When the additional water is supplied, the existing facilities(Air-chamber, Vacuum breaker valve) are sufficient to alleviate shock not changing capacity alteration, judging from the airspace change and rise. Therefore, there is no problem for Water-hammer by installing Air-chamber(4 m3) and Vacuum breaker valve(Φ100 ㎜) at the top of Yeo-ju hill.
한상현(Sang-hyun Han),김동관(Dong-Kwan Kim),라병필(Beyong-pil Ra),유병문(Beyong-moon Yoo),정세채(Se-chae Jeong) 한국유체기계학회 2010 유체기계 연구개발 발표회 논문집 Vol.2010 No.12
Sewerage system to treat waste sludge occurring from filtration process of water treatment plant is very important to be stable effluents Quality, Sewerage system consist of discharged basin to equalize the sludge from sedimentation basin, sludge thickner basin to concertrate for 24 hours or more concentrated the sludge from discharged basin, dehydrator for dehydrating the sludge from sludge thickner, and recycling basin to reuse a sand filter wash water. sludge thickner baisn in sewerage system discharges upper water of sludge from discharged basin, decanted water and wash water of wash filter from dehydrator finally. In order to stabilize the effluent, the most important thing is the treatment of upper water on sludge thickner basin. Nowdays, It is planing to strength a law on effluents quality of sewerage system for making low 10 (value of S.S.) until 2013. Furthermore, sewerage system processing of the boreyong water treatment plant has some trouble, such as the rise as the value of SS up to 100. This paper is performed to find out the stability of effullents quality through the sewerage system optimization at boreyong water treatment plant.
전욱표(Wook-Pyo Jun),오상현(Sang-hyun Oh),이계복(Kye-Bock Lee),라병필(Beyong-Pil Ra),박한영(Han-Yung Park),김진훈(JIn-Hun Kim) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-
This study is the content about the pumping system that the case for the quantity control without the water reservoir at the point being an outflow high ground of the pumping station to provide the water. We are stable research for the operation of the cost reduction and equipment through the facilities improvement in the best suited driving is difficult to the change of the pump of the characteristic curve and an energy loss is happening.
최적 설계가이드라인 적용을 통한 산기식 수중폭기설비 효과분석
한상현(Sang-hyun Han),송재형(Jea-Hyung Song),라병필(Beyong-pil Ra),유병문(Beyong-moon Yoo),Se-chae Jeong 한국유체기계학회 2011 유체기계 연구개발 발표회 논문집 Vol.2011 No.11
In Korea while the dam or reservoir is an important water resource, the value of this water resource is deteriorating by thermal-induced stratification. To ameliorate the water quality of reservoir by breaking stratification the use of air diffuser system is now widespread in Korea. According to the previous research, dynamics of bubble plume and destratification efficiency depended upon two dimensionless groupings; Mh and Pn suggested by Asaeda et al (1993). However, these two variables only include Q, N, H, g, u. and installed Boryeng reservior in appropriate width of water aeration, air dose and number of installations after calculating by applying these figures. This paper is performed to find out effect analysis of water aeration applying the optimal design guide lines that paper presented at K-Water in 2010
박종호(Jong Ho Park),박한영(Han Yung Park),라병필(Beyong Pil Ra),김진훈(Jin Hoon Kim),노선민(Sun Min Roh) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-
In pump stations, abrupt black-out can cause water hammer to break pipeline, pumps and valves if the pressure is high enough. To prevent this, usually we adopt air-chamber and safety valve. Currently, schematic control of valves downstream of pumps is also proposed as an economical way to damp pressure surge in pump station. In Sung-Nam pump station of Kwater, they replaced check valves of pumps to butterfly valves which can be controlled by logical sequence to check back-flow, to open-close for starting and to stop and to relieve water hammer. This study is to evaluate the ability of the butterfly valve and to make optimal control schedule of the valve as a damper of water hammer.