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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.
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.
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 %.
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.
서민호 ( Min Ho Seo ),신경순 ( Kyeong Soon Shin ),장민철 ( Min Chul Jang ),서호영 ( Ho Young Soh ) 한국환경생물학회 2013 환경생물 : 환경생물학회지 Vol.31 No.4
각기 다른 해양환경 특성을 보이는 서해, 남해, 동해 주요 항을 대상으로 여름철 동물플랑크톤 군집구조에 대하여 조사를 실시하였다. 서해 항들에서 가장 높은 수온을 보였으며, 남해, 동해로 갈수록 감소하였다. 이와 반대로 염분은 서해에서 가장 낮았으며, 동해에서 가장 높았다. 식물플랑크톤 생체량은 남해에서 가장 높았으며, 서해, 동해 순으로 낮았다. 동물플랑크톤 출현 분류군수는 서해, 남해, 동해 순으로 높았다. 요각류는 서해에서 최우점 분 류군이었으나, 남해와 동해에서 그 중요도가 감소하였다. Paracalanus parvus s. l.가 전 해역에서 우점 출현하였다. 이외에 서해에서는 Acartia hongi, A. ohtsukai, Pavocalanus crassirostris가 우점 출현하였으며, 남해에서는 A.omorii가, 동해에서는 A. omorii, Oithona spp.가 우점 출현하였다. 여름철 한국 주요 항은 지역에 따라 확실히 구분되었다. 동물플랑크톤의 군집 특성은 수온, 염분 이외에 식물플랑크톤 생체량 차이에 영향을 받는 것으로 나타났다. Zooplankton community in the major ports of Korea, which were characterized by a specific marine environmental condition during summer, was studied. Water temperature in the ports of western areas was higher and while those in the East Sea was lower. Contradictorily, the salinity was lowest in the western areas, while being highest in the eastern area. The Chl-a concentration was highest in the southern areas and lowest in the eastern one. Zooplankton taxa were most diverse in the western areas and simplest in the eastern one. Copepods predominantly occurred in the western areas, but their abundance relatively decreased in the southern and eastern areas. Cluster analysis revealed that copepod communities were classified into 3 summit groups, the western, southern and eastern areas. The results indicate that zooplankton communities in Korean ports may be affected by biological factors like Chl-a concentration in addition to environmental factor such as temperature and salinity.
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.