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우상우,황광일,김종헌,신승호,Woo, Sang-Woo,Hwang, Kwang-Il,Kim, Jong-Hun,Shin, Seung-Ho 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.3
This study proposes a CFD(Computational Fluid Dynamics) analysis as a method of verification of the designed-data and a supplement of the insufficient experiences in geothermal system, which shows a rapid growth among the renewable energies. The followings are the results. FLUENT 6.2.12 is used as a CFD tool on this study, with the equations of continuity, motion, energy for unsteady flow through pipes and k-epsilon turbulent model. S-type model which has one borehole with diameter 12m by depth 206m and T-type model which has 3 boreholes with $12m{\times}20m{\times}206m$ are proposed, and also the boundary conditions are described. The temperature differences between temperatures by CFD analysis and by on-site measurement are less than 1.5%, this shows a high reliability of CFD analysis process which this study proposes. After 11 days simulation operated 12 hours interval On/Off mode, it is clearly predicted that the outlet temperatures of geothermal pipes are increased by $1.2^{\circ}C$, and $2.2^{\circ}C$ after 4 months. And the outlet temperatures of geothermal pipes increased with increase of the mass flow rates through the pipes. T-type model shows that the 4m distance between boreholes are reasonable because the temperatures at 2m and 6m from boreholes are nearly same.
우상우(Woo, Sang-Woo),김현구(Kim, Hyun-Goo) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
The purposes of this study are to consider the influence of topography resolution on atmospheric flow simulation and to suggest a method of atmospheric flow simulation using a low-resolution DEM. Simulations using a low-resolution DEM has more critical error at near surface than simulations using high-resolution DEM because it is ignored the small curve topography of high-resolution DEM. Therefore when we convert the height differences between low-resolution DEM and high-resolution DEM into the topography roughness, we can be able to reduce the error on atmospheric flow simulations.
주행차량에 의한 중앙분리대 유도풍의 풍력발전 활용 가능성
우상우(Woo, Sang-Woo),김현구(Kim, Hyun-Goo),장문석(Jang, Moon-Seok),신형기(Shin, Hyung-Ki) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10
The purpose of this study is to confirm the possibility of wind power generation by a vehicle-induced at the median strip on highway. In order to find out wind field information, a CFD method was used. According to the simulation results, the x, y, z-component of the wind velocity around a median strip are rapidly changed at near before and behind a moving vehicle. The x-component of the wind velocity appears high within the range of the length of the passing vehicle, and the wind direction appeared in the opposite direction at the behind of a vehicle. However, x and y-components of the wind velocity at the behind of vehicle are shown constantly. We confirmed possibility of wind power generation using a vehicle-induced wind at the median strip.
대상관계와 반사회적 성격특성의 관련성에서 방어유형의 매개효과
우상우 ( Sang Woo Woo ),장문선 ( Moon Sun Chang ) 한국동서정신과학회 2009 동서정신과학 Vol.12 No.1
본 연구에서는 DSM-Ⅳ에서 분류되어 있는 반사회적 성격특성에 대해 우선 초기대상관계 경험과 현재의 자기개념 및 타인개념들의 설명력의 정도를 살펴보았다. 이를 바탕으로 반사회적 성격특성과 대상관계 변수들 간에서 방어유형의 매개효과가 있는지 밝혀보고자 하였다. 이를 위해 본 연구에서 대상은 474명의 남녀 대학생들로, 이들에게 초기대상관계 척도, 자기개념질문지, 타인개념질문지, 한국판 방어유형 질문지, 한국형 성격장애진단 설문지를 실시하였다. 연구 결과 첫째, 반사회적 성격특성을 설명하는 변수에서 대상관계 변수와 방어유형 변수가 반사회적 성격특성을 설명하는 데에 중요한 것으로 나타났으며 특히, 초기대상관계 변수에서는 부정적 부모 모두와의 부정적 관계 경험 그리고 현재대상관계 변수에서는 부정적인 자기개념 및 타인개념이 반사회적 성격특성을 보다 잘 설명하는 것으로 나타났다. 둘째, 대상관계 변수들이 방어유형 중 미성숙 방어유형의 높은 사용과 자기억제 방어유형의 낮은 사용을 통한 매개효과가 확인되었다. 끝으로, 본 연구의 임상적 의의와 제한점에 관해 논의되었다. This research was to investigate the mediating effect of the defense mechanism to the relationship among object relationship and B cluster personality trait. In Study, four hundred seventy four undergraduate students completed th following questionnaires: the Mother-early Object Relationship Scale, Father-early Object Scale, Self-Concept Scale, Other-Concept Scale, Korea-Defense Style Questionnaire, Korea-Personality Disorder Scale. the results of hierarchical multiple regression showed that the effects of early object relationship and present self, object concept, defense mechanism on antisocial personality trait were significant. Second, the mediation effects of defense mechanism between early object relationship, present self, object concept and antisocial personality trait were significant. finally, the the clinical implications and limitations of this study are discussed.
수직형 지열교환기의 입ㆍ출구온도에 대한 실측과 CFD 결과 비교
우상우(Sang-woo Woo),김중헌(Joong-hun Kim),신승호(Seung-ho Shin),황광일(Kwang-il Hwang) 한국지열·수열에너지학회 2007 한국지열에너지학회논문집 Vol.3 No.1
The purpose of this study is to use the CFD(Computational Fluid Dynamics) method for the ground source heat pump(GSHP) system with vertical U-tube ground heat exchangers. In order to predict LWT(leaving water temperature) in the length of time, This simulation is used by utilizing FLUENT which is commercial CFD code. It was performed by based on four boreholes in the field. Comparing with the results of CFD and field measurement for LWT, the results of CFD was presented very good agreement with 1.0% average difference.
새만금 방조제에 의한 풍력터빈 입사풍 변화의 전산유동해석
우상우(Woo, Sang-Woo),김현구(Kim, Hyun-Goo) 한국신재생에너지학회 2013 신재생에너지 Vol.9 No.1
Jeollabuk-do has announced a future plan for the Saemangeum Wind Farm which includes the installation of fourteen wind turbines in a single line, located 500m back from the Saemangeum Seawall. It is anticipated as a positive effect that, for sea breeze blowing toward land, the average wind speed could be accelerated and the wind speed distribution could be uniformized by dint of the seawall, an upstream structure of the turbines. At the same time it is also anticipated as a negative effect that the strength of wind turbulence could be increased due to the flow separation generated at the back end of the seawall. According to the results of the computational fluid dynamics analysis of this paper, it has been observed that, at the 50m zone on the road surface located at the uppermost part of the Saemangeum Seawall, the average wind speed has been accelerated by approximately 6~7% and that wind shear has been decreased by 70%, but this positive effect disappears in the zone situated beyond the 100m from the back end of the seawall. It has also been observed that flow separation exists to a limited extent only below the bottom of the blade-sweeping circle and, furthermore, does not extend very far downstream of the wind. As a conclusion, it can be said that the seawall neither positively nor negatively affects the proposed Saemangeum Seawall Wind Farm layout.
우상우(Sang-Woo Woo),황광일(Kwang-Il Hwang),김중헌(Joong Joong-Hun Kim),양기영(Gi- Young Yang),신승호(Seung-Ho Shin) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6
The purpose of this study is on the performance evaluation of horizontally installed HGHEX(Horizontal-type Geothermal Heat EXchanger) in the summer season and the winter season. Followings are the results. By the result of data acquisition at the site, 2.5~2.7℃ temperature differences are gained between supply pipes and return pipes of HGHEX in the summer season. And 0.5~1.5℃ temperature differences are gained from HGHEX in the winter season. With these temperature differences, heat quantity of rejection and absorption is calculated and the performance of HGHEX is evaluated according to the seasons.