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분산전원시스템에 적합한 에너지 저장장치의 급속충전에 관한 연구
김성현(Kim Sunghyun),안상용(Sang Yong An),안창덕(Chang Doeuk An),윤영삼(Young Sam Yoon) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.11
본 논문에서는 분산전원시스템의 에너지 저장장치로 널리 사용되는 Lead-Acid 배터리에 대한 특성을 나타내었다. 기존의 정전류-정전압 충전과 Step-Down 정전류 충전의 비교 실험을 통해 Step-Down 정전류 충전 시 가스발생을 최소화하고 급속충전이 가능함을 나타내었다.
활성탄의 기공구조에 따른 아세톤 증기와 톨루엔 증기의 흡착 및 탈착특성 비교
이송우 ( Song Woo Lee ),나영수 ( Young Soo Na ),안창덕 ( Chang Doeuk An ),이민규 ( Min Gyu Lee ) 한국환경과학회 2012 한국환경과학회지 Vol.21 No.10
The purpose of this work is to study the adsorption and desorption characteristics of acetone vapor and toluene vapor from adsorption tower in the VOCs recovery device. The six kinds of activated carbon with different pore structures were used and the adsorption and desorption characteristics were compared according to pore structure, desorption temperature, and adsorption method, respectively. Adsorption capacity of acetone vapor and toluene vapor by batch method was higher than that by dynamic method. Especially, activated carbon with medium-sized or large pores had more difference in adsorption capacity according to adsorption methods as a result of gradually condensation of vapors on relatively mesopore and large pores. Activated carbons with relatively large pores and relatively small saturated adsorption capacity had excellent desorption ability.
이송우 ( Song Woo Lee ),나영수 ( Young Soo Na ),안창덕 ( Chang Doeuk An ),이민규 ( Min Gyu Lee ) 한국환경과학회 2011 한국환경과학회지 Vol.20 No.5
The purpose of this work is to present the experiment results by a dynamic adsorption of water vapor on pelletized zeolites (ADZ300, ADZ400, and ADZ500) in fixed bed. The breakthrough curves of water vapor with several different concentrations and temperature in the range of 25~45℃ on zeolite bed were investigated. In the same conditions, the breakthrough time on ADZ400 and ADZ500 were little longer than ADZ300, and the equilibrium adsorption capacity on ADZ500 was highest. The higher the concentration of water vapor was, the faster the breakthrough time was, and the slope of breakthrough curves showed a tendency to increase. The faster the flow rate of water vapor was, the faster the breakthrough time was relatively, but variations between flow rate and breakthrough time did not have a proportional relationship. The breakthrough curve maintained constant gradient in spite of variation of flow rate in the same concentration. The temperature rise in zeolite bed by adsorption heat was occurred in the early stage of adsorption. After water molecule layers were formed on the surface of zeolite, the temperature was slowly cooled by water vapors continuously flowed in as constant temperature. The greater the concentration of water vapor and adsorption temperature were, the temperature difference in zeolite bed was increased.
이송우 ( Song Woo Lee ),나영수 ( Young Soo Na ),안창덕 ( Chang Doeuk An ),이민규 ( Min Gyu Lee ) 한국환경과학회 2011 한국환경과학회지 Vol.20 No.6
This work is to compare the experiment results by a continuous fixed-bed adsorption of water vapor, acetone vapor, and toluene vapor on zeolite 13X (SAU) and silica-alumina (SAK). SAU and SAK have very different pore structure but similar composition as inorganic adsorbent. The relationship between the equilibrium adsorption capacity and specific pore size range were studied. Adsorption of water vapor was more suitable on SAU than SAK because SAU has relatively more developed pores around 5 Å than SAK in the pore range of 10 ~ 100 Å. Adsorption of acetone vapor was more suitable on SAK than SAU because SAK has relatively more developed pores around 5~10 Å than SAK in the pore range of less than 10 Å. Adsorption of toluene vapor was more suitable on SAK than SAU because SAK has relatively more developed pores in the pore range of 10~100 Å than SAK. Adsorption capacity of the adsorbent was closely related to the surface area generated in the specific pore size region. But it was difficult to distinguish the relationships between adsorption capacity and micro area, and the external surface area of adsorbent.