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역삼투압식 해수담수화플랜트용 용적형 에너지회수장치 개발
권순광(S. K. Kwon),강만곤(M. G. Kang),최현철(H. C. Choi),전상규(S. G. Jeon) 유공압건설기계학회 2011 유공압건설기계학회 학술대회논문집 Vol.2011 No.6
ERDs(Energy Recovery Devices) helps to lower specific water cost by saving power consumption of the high pressure pumps in SWRO(Seawater Reverse Osmosis) desalination plants thus making the process more efficient and cheaper. This paper introduces a design of directional control valve for the ERD, which can realize high efficiency with the sliding poppet valve type by emans of the ultimate leakage protection in a pressure exchanger. The poppet valves are inherently the best method for leakage protection. And the ERD control valve is designed so that four poppets are controlled simultaneously by a single shaft. It is also designed to ensure the minimization of leakage as well as pressure loss. The pilot scale test(7.2m³/h) successfully showed high efficiency of 97% with this mechanism.
권순광(S. K. Kwon),강만곤(M. G. Kang),최준혁(H. C. Choi),이중연(J. Y. Lee),전상규(S. G. Jeon) 유공압건설기계학회 2012 유공압건설기계학회 학술대회논문집 Vol.2012 No.6
Seawater reverse osmosis(SWRO) desalination plants are being expanded to apply due to the advantages of lower energy consumption. The desalination plants tend to be larger considering the cost of capital, operation and maintenance, the research and development for high efficiency components is being accelerated. Hyosung Goodspings Inc. is developing a high efficiency energy recovery system for saving electric power consumption in the plants. Direction control valves of the energy recovery system have novel structure which combine poppets and spools to minimize leakage. The valves is able to reduce external power required to change the direction using pressure balancing parts. To apply the energy recovery system in the large plants, multiple energy recovery device is connected in parallel. The pilot scale system of parallel structure was manufactured, and it was tested the performance by a pilot plant.
함영복(Y. B. Ham),권순광(S. K. Kwon),공태우(T,W. Kong),윤소남(S. N. Yun),안국영 (K. Y. Ahn) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
The hydrogen compressor system with metal diaphragm is operated by oil hydraulic power. It consists of gas head, metal diaphragm, oil head, oil compensating pump, relief valve and plunger etc. An oil compensating pump have been demanded to compensate for an oil leakage in an oil head chamber and a piston head chamber. The oil leakage is occurred through clearance between a plunger and a main cylinder Some quantity of oil overflow through a relief valve. So, the hydrogen compressor system has to have the oil compensating pump, commonly used radial piston type hydraulic pump and coupled operating with main crank shaft. Main components are operated by oil hydraulic components in this system. Therefore, a dynamic simulation model of the hydraulic system using commercial software AMESim tool is developed in this study, included a radial piston type oil compensating pump model, a high speed and a high pressure relief valve model, a plunger driven by crank shaft and system head part included the metal diaphragm etc. A dynamic simulation results presented the operating characteristics of main hydraulic components in this simulation.
함영복(Y. B. Ham),공태우(T. W. Kong),차재곤(J. G. Cha),권순광(S. K. Kwon),안국영(K. Y. Ahn) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
The metal diaphragm type hydrogen compressor system is operated by oil hydraulic power, In this system an oil compensating pump have been demanded to compensate for leakage oil head chamber. The oil leakage is occurred two parts, the one is a clearance leakage between plunger piston and main cylinder, the other is an overflow through the relief valve. So, metal diaphragm type hydrogen compressor have to consist of an oil compensating pump, commonly used hydraulic piston pump driven by main crank shaft. The radial piston type oil compensating pump is developed and experimented with new rolling contacted piston mechanism. The search results compared with commonly used line contacted piston and the new rolling contacted piston using ball. The developed the one piston element of the radial piston pump consists of piston having steel ball, return spring two check valves and eccentric cam having ball racer. The volumetric displacement of designed one piston element is 0.437cc/rev. Operating characteristics are tested such as no load to 60bar loaded with every 20bar increasing step, where pressure ripple and flow rate are experimentally investigated.