http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김한일(Han Il Kim),노선민(Sun Min Roh) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
It is well known that a method of liquid flow-rate measurement in closed conduits by measuring the mass of liquid delivered into a weighing tank is the most accurate way to calibrate flowmeter for liquid. Most of developed countries already had a standard calibration system using this method and this could cover enough range of flow-rate to satisfy the calibration demands of industry. KWATER(Korea Water Resources Corporation) constructed the biggest flow-meter calibration system in Korea and evaluated the uncertainty of the system.
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.