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서호영(Seo Ho-Young),김종규(Kim Jong-Kyu),이상남(Lee Sang-Nam),강용혁(Kang Youg-Heack),이상태(Lee Sang-Tae) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
This paper presents the scroll type stirling engine receiver of 10 ㎾ dish/stirling system. The scroll type stirling engine was consisted of scroll compressor and expander instead of power piston and displacer. The spiral one-pass, multi-pass(5 channel, 6 channel) and PCHE receiver of stirling engine were considered in this study. Experimental conditions of air were set a pressure of 5 bar and volume flow rate of 25 ㎥/hr. The experiments were conducted at the 40 ㎾ solar furnace system in KIER. According to the results, outlet temperature of the spiral one-pass receiver was 553 ℃ and average efficiency of which was about 83 %. For the multi-pass receivers of 5 channels and 6 channels, outlet temperatures of which were 441 ℃ and 636 ℃, respectively. And average efficiency of the two receivers became about 76 % and 88 %. In addition, outlet temperature and efficiency of the PCHE receiver was 594 ℃ and 73 %, respectively. Therefore, 6 channel receiver showed higher heat transfer perfomance than the other one.
타워형 태양열 흡수기의 열전달 특성 실험장치에 관한 연구
서호영(Seo, Ho-Young),김종규(Kim, Jong-Kyu),강용혁(Kang, Yong-Heack),김용찬(Kim, Yong-Chan) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06
This paper describes an experiment facility to measure the circulation characteristics of a water/steam receiver at various heat fluxes. The natural circulation type receiver was considered in this study. The experiment facility was designed to satisfy circulation balance with an appropriate scale down. As a result, riser tube inner diameter was 7.4 mm and water circulation was 0.319 kg/s. Downcomer tube inner diameter by circulation balance was 9.52 mm and the quality was from 0 to 0.23.
서호영(Seo, Ho-Young),김종규(Kim, Jong-Kyu),강용혁(Kang, Yong-Heack) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
Solar receiver in the solar power tower system has a similarity to a boiler of the thermal power plant in many aspects. However Boiler is operated long time without stopping while solar receiver repeats start and stop every day. The objective of this study is to investigate start-up characteristics of solar receiver. The experimental device was constructed in a bench scale. Basic experimental condition of water/steam was set by 25 bar and 223?C. Initially, the heat was added into risers only, then another experiment with input into drum additionally was done. When the heat flux was valid only risers, it took about 300 minutes until the water temperature in drum reached 223?C. Water temperature of drum was increased by 44?C/hr with 91.14 g/s of water circulation. With additional heat input into drum, 200 minutes was required to reach 223?C. In this case temperature was increased 66?C/hr with 96.5 g/s of water circulation.
디자이너와 사용자의 간극을 좁히는 프로세스로서 스토리텔링 방향성 제안
서호영(Seo, Ho Young),정의철(Jung, Eui-Chul) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2
사용자 경험 중심 디자인의 중요도가 높아지면서 디자이너는 사회적 맥락에 따라 사용자 경험의 질을 높일 책임이 주어졌다. 이를 위한 프로세스 방법으로 스토리텔링이 부각되어 왔으며 많은 기업들이 전략적으로 활용하고 있지만 마케팅 툴에서 크게 벗어나지 못하고 더딘 진화를 보인다. 본 연구는 디자인 툴로서 스토리텔링의 정착이 필요성을 느끼며 그에 따라 디자이너 또한 사용자로 보고 있다. 디자인과 스토리, 사용자 경험의 관계를 알아보고 디자인 프로세스로서 스토리텔링 사례 분석을 통해 방법론의 근본적인 기준에 대한 방향성을 제안한다.
서호영(Hoyoung Seo),남경호(Kyung-Ho Nam),홍기민(Kimin Hong) 한국자기학회 2012 韓國磁氣學會誌 Vol.22 No.2
We have studied a means to control the composition of nickel-iron thin films. By changing current and voltage applied to a electroplating electrolyte we could manipulate the relative concentration of nickel and iron in the thin films, which caused variations of coercivity, squareness, and saturation magnetic field. As we increase the content of iron in the thin films by using potentiostatic and galvanostatic plating, the grain size was increased and the coercivity was reduced.
태양열 발전용 스크롤 방식 스터링엔진 흡수가 특성 연구
서호영(Seo Ho-Young),김종규(Kim Jong-Kyu),이상남(Lee Sang-Nam),강용혁(Kang Youg-Heack) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월
This paper describes the characteristics of scroll type stirling engine receiver. Scroll type stirling engine operated scroll compressor and expander instead of piston. Pass dimension of the receiver was 14(W)×14(H) ㎜ and total pass length was 5,049 ㎜. External dimension of the receiver was 300×300 ㎜. The experimental facility consisted of parabolic dish concentrator, compressor to supply air, triplex air filter, and flowmeter. In this study, basic experimental conditions were set at a inlet pressure of 5 bar and volume flow rate of 25 ㎥/hr. As a result, air temperature in receiver at each measuring position of point 1, 2, 3 were 241 ℃, 465 ℃, and 542 ℃ respectively at inlet pressure of 5.5 bar and volume flow rate of 24.6 ㎥/hr. As DNI increasing, heat transfer coefficient of the receiver changed from 695 W/㎡K to 827 W/㎡K. Average heat transfer coefficient of receiver in the experiment was 798 W/㎡K. In addition, receiver efficiency became about 83 %.
타워형 태양열 발전 흡수기의 열유속에 따른 수순환 특성 연구
서호영(Seo Ho-Young),김종규(Kim Jong-Kyu),강용혁(Kang Yong-Heack),김용찬(Yongchan Kim) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.2
This paper describes water circulation characteristics of a water/steam receiver at various heat fluxes. The water/steam receiver for a solar tower power system is a natural circulation type. Experimental conditions of water and steam were set at a pressure of 5 bar and temperature of 151.8℃. The experimental device for the water/steam receiver consisted of a steam drum, upper/lower header. riser tubes, and down comer tube. The experiments were conducted by varying heat fluxes in terms of mass flow rate in each riser tube. However, the total mass flow rate on the riser tubes was fixed at 217.4 g/s. For the uniform heat flux, while the water temperature of the steam drum and upper header were kept at steady state, the temperature of the lower header was fluctuated. For the non-uniform heat flux, while the temperature of the steam drum was kept a steady state, the temperature difference increased in the right and left side of the upper header, and the temperature of the lower header was fluctuated.
2020년 하계 제주도 인근 대륙붕 해역의 저서다모류군집 구조 및 저서생태계 건강도 평가
이서이,김건,서호영,신현출,Lee, Seo Yi,Kim, Geon,Soh, Ho Young,Shin, Hyun Chool 한국해양과학기술원 2022 Ocean and Polar Research Vol.44 No.2
This study was carried out to investigate the benthic polychaetous community and benthic ecosystem quality status on the adjacent continental shelf of Jeju Island, and field surveys were conducted at 31 stations in July and August, 2020. The surface sediment was generally composed of muddy sand facies and sandy mud facies, and the average particle size was medium silt (6.1±1.6∅). The benthic polychaetous community revealed a total of 73 species with a mean density of 242 ind./m<sup>2</sup>. The major dominant species were Notomastus latericeus, Ampharete arctica and Onuphis shirikishinaiensis. By the cluster analysis and nMDS results based on species composition of the benthic polychaetous community, the study area was divided into three station groups arranged from east to west by the water depth and sedimentary facies. The station group located in the west was subdivided into two station groups from south to north. From results of correlation analysis and PCA, it was found that the benthic polychaetous community in the study area had a strong correlation with the sedimentary environment and water depth. The benthic faunal community (or ecosystem) on the adjacent continental shelf of Jeju Island was assessed to be in a healthy state by biotic indices such as AMBI and BPI.