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석탄화력 발전용 초임계 CO₂ 브레이튼 사이클 기술 동향
임동렬(Dong-Ryul Rhim),박성호(Sung-Ho Park),윤문규(Munkyu Yoon),송한얼(Haneol Song),오승천(Seung-Chun Oh),신중욱(Jung-Uk Shin) 한국에너지기후변화학회 2017 에너지기후변화학회지 Vol.12 No.1
The supercritical CO₂(sCO₂) generation system has recently been gaining a lot of attention for application to coal power plants. The advantages of sCO₂ generation system are high efficiency, environment-friendly, and small size compared to steam generation system of conventional power plants. Therefore, the sCO₂ generation system will be applied to coal power plant as alternate methods in the near future. In this paper, study of the principles and characteristics for the sCO₂ generation system with coal power plant and the current development of the sCO₂ generation will be introduced.
임동렬(Dong-Ryul Rhim),이상업(Sang-Up Lee),이상규(Sang-Kyoo Lee),김민정(Min-Jung Kim),김숭기(Soong-Kee Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
Numerical study has been conducted for improving air flow characteristics in the exhaust aftertreatment system of diesel-fueled passenger cars by changing length and shape of a DPF diffuser using a commercial CFD code. The results of axial velocity and static pressure distributions along with air flow uniformity results show that a diffuser shape like 2D or 3D function type is proposed for the better air flow patterns in front of a DPF.
임동렬(Dong-Ryul Rhim),이상규(Sang-Kyoo Lee),김민정(Min-Jung Kim),이상업(Sang-Up Lee),곽성순(Sung-Soon Kwak),서정일(Jeong-Il Seo) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Analyses of the heat transfer and thermal stress on an exhaust manifold ofa heavy-duty diesel engine were conducted by using a conjugate heat transfer method. The temperature distribution and heat transfer coefficients at the walls of the exhaust manifold were estimated from the results of exhaust gas flow analysis. Thermal deformations of the exhaust manifold due to the uneven temperature distribution were studied with a structural analysis.
임동렬(Dong-Ryul Rhim),이상업(Sang-Up Lee),김민정(Min-Jung Kim),김숭기(Soong-Kee Kim),김성규(Seong-Kyu Kim) 한국유체기계학회 2005 유체기계 연구개발 발표회 논문집 Vol.- No.-
Numerical analysis has been conducted for improving air flow characteristics in the exhaust aftertreatment system of diesel-fueled passenger cars by changing axial length and cone shape of a DPF diffuser. The results of air velocity and static pressure distributions along with air flow uniformity results suggest that a diffuser shape with 2D or 3D function type is better for air flow patterns in front of a DPF.
임동렬(Dong-Ryul Rhim),조남효(Nam-Hyo Cho) 한국유체기계학회 2004 유체기계 연구개발 발표회 논문집 Vol.- No.-
Experimental study was conducted to increase the oxygen transfer efficiency of air diffusers in clean water. By measuring the bubble size from the bubbly two-phase flow visualization with several air diffusers the size of air bubbles near the top surface of aeration tank seems to be independent on the diffuser types. Considering design parameters for the better breakup of larger bubbles around the air diffusers, advanced conceptual air diffusers using nozzle-type throat showing the higher oxygen transfer efficiencies were made.
CFD-FE 연성해석 기법을 이용한 대형디젤엔진 배기 매니폴드의 열응력 해석
임동렬(Dong-Ryul Rhim),이상규(Sang-Kyoo Lee),이상업(Sang-Up Lee),김민정(Min-Jung Kim) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
The exhaust manifold in a heavy-duty diesel engine is very strictly designed on th thermal performance. The current study is to get the temperature distribution and heat transfer coefficients at the walls of the exhaust manifold using a coupled CFD-FE analysis method with the consideration of exhaust gas flow and convective heat transfer. Thermal deformation of the exhaust manifold owing to the thermal stresses is investigated by coupling the temperature distribution into a structural analysis code.
임동렬(Dong-Ryul Rhim),이상규(Sang-Kyoo Lee),김민정(Min-Jung Kim),정재우(Jae-Woo Chung),강우(Woo Kang) 한국유체기계학회 2007 유체기계 연구개발 발표회 논문집 Vol.- No.-
Swirl flow characteristics in a DI diesel engine as a reference engine of an HCCI engine development were numerically analysed. Moving meshes for the unsteady conditions were generated with the help of a commercial CFD code. Unsteady swirl flow analyses were conducted with the combination of 3 intake port inlets, then the results of air flow velocity distributions and swirl ratio for an analytic case were compared with the results form the other cases. Strong usability and possibility of unsteady CFD methods for the intake port design of diesel engine as a reference engine of an HCCI engine were suggested in the current study.