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최성호(Sung Ho Choi),임종우(Jong Woo Lim),고한서(Han Seo Ko) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
In this study, a minimized air purifier was developed by computational fluid dynamics (CFD). Case studies were performed with many variables such as a fan position and shape, a flow direction, and sizes of inlet and outlet areas. The CFD data were compared with the experimental data of the velocity and flow rate for the existing air purifier to confirm its reliability. The rate of flow reversals was considered for the inlet and outlet sizes. Also, the turbulent kinetic energy and wall shear stress were studied to optimize the fan shape. Finally, a prototype of the air purifier was manufactured by the result of the case study, and its enhanced performance was confirmed in the matter of the flow rate and noise.
이상철 ( Sang Chul Lee ),최성호 ( Sung Ho Choi ),이우균 ( Woo Kyun Lee ),박태진 ( Tae Jin Park ),오수현 ( Suh Yun Oh ),김순아 ( Su Na Kim ) 한국임학회 2011 한국산림과학회지 Vol.100 No.2
본 연구에서는 Intergovernmental Panel on Climate Change(IPCC) 기후변화 시나리오 A2와 B1에 따른 산림분포 취약성을 평가하였다. 산림분포 취약성은 한국형 산림 생태계 분포 모델 Thermal Analogy Groups(TAG) 의 산림분포예측 방법과 Hydrology Thermal Analogy Groups(HyTAG)에서 정의한 식생유형을 이용하여 기후 변화에 따른 잠재 식물상(Plant Functional Type: PFT)의 분포 변화를 기후변화 민감성과 적응성으로 나누어 평가되었다. 그 결과, 산림분포가 취약한 지역의 면적은 A2 시나리오에서 전체 국토 면적의 30.78%, B1에서는 2.81%로 나타났다. 행정구역별 취약성 평가 결과는 부산이 A2 시나리오에서 가장 취약하고 대구가 B1 시나리오에서 가장 큰 취약성을 나타냈다. 미래 발전 방향에 따라서 상이하게 구축된 시나리오 별 산림 분포 취약성 결과는 앞으로 산림 분야 적응대책수립에 중요한 자료로 이용될 것이다. This study was aiming at assessing the vulnerability of forest distribution by the A2 and B1 climate change scenarios of Intergovernmental Panel on Climate Change (IPCC). The vulnerability of forest distribution was assessed using its sensitivity and adaptation to climate change with the help of the simulations of Korean-specific forest distribution model, so-called the Thermal Analogy Group (TAG), and the Plant Functional Type (PFT) defined in the HyTAG (Hydrological and Thermal Analogy Groups) model. As a result, the vulnerable area occupied 30.78% and 2.81% of Korea in A2 and B1 scenario, respectively. When it comes to the administrative districts, Pusan in A2 and Daegu in B1 appeared the most vulnerable area. This study would be employed into preparation of adaptative measures for forest in future in terms of using climate change scenarios reflecting different future development conditions.