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정현준(Hyeon Jun Jung),장택진(Taek Jin Jang),김종봉(Jong-Bong Kim) 대한기계학회 2020 大韓機械學會論文集A Vol.44 No.9
수직 농장은 토지 면적 대비 식량 생산량을 늘려 미래의 식량난을 해결할 방법으로 주목 받고 있다. 수직 농장은 기본적으로 수경 재배가 가능한 재배 용기들을 여러 층으로 쌓아 올려 공간 효율을 높인다. 따라서 구조적 안정성을 위해 기본 구성 요소인 재배 용기에 대한 설계가 필요하다. 본 연구에서는 프레임의 무게 대비 강성인 비강성 향상을 목적으로 최적 설계를 수행하였다. 먼저 위상 최적화 방법을 이용하여 용기의 이상적인 단면 형상을 도출하였다. 다음으로 주효과 분석과 표면 반응법을 통해 용기의 경량화와 강성을 확보하였다. 최적화된 재배 용기는 최적화 전 용기 대비 질량은 16% 줄고, 비강성은 12배 증가하도록 형상을 설계하였다. Vertical farms are gaining interest as a solution to food shortages in the future by increasing food production relative to land area. In vertical farms, hydroponic cultivation frames are stacked for space efficiency. Thus, a cultivation vessel with structural reliability needs to be developed. In this study, the cultivation vessel was designed using optimization processes to improve the specific stiffness. Topology optimization is performed for the sectional area of the cultivation vessel and to obtain an approximate sectional shape. The cultivation vessel was designed with a constant cross section to allow manufacturing by extrusion. Then, the design of experiment (DOE) and response surface method (RSM) were performed to determine the detailed dimension of the vessel. Finally, the prototypes for the original and optimal designs were made using a three-dimensional printer, and the specific stiffness values for both models were measured. The mass was reduced by 16, and the specific stiffness was increased by 119 in the optimized design.
무결정결함영역을 유지하면서 에너지를 절감하는 초크랄스키 실리콘 단결정 성장로 수냉관 최적 설계
채강호(Kang Ho Chae),조나영(Na Yeong Cho),조민제(Min Je Cho),정현준(Hyeon Jun Jung),정재학(Jae Hak Jung),성수환(Su Whan Sung),육영진(Young Jin Yook) 한국태양광발전학회 2018 Current Photovoltaic Research Vol.6 No.2
Recently solar cell industry needs the optimal design of Czochralski process for low cost high quality silicon mono crystalline ingot. Because market needs both high efficient solar cell and similar cost with multi-crystalline Si ingot. For cost reduction in Czochralski process, first of all energy reduction should be completed because Czochralski process is high energy consumption process. For this purpose we studied optimal water-cooling tube design and simultaneously we also check the quality of ingot with Von mises stress and V(pull speed of ingot)/G(temperature gradient to the crystallization) values. At this research we used CG-Sim<SUP>Ⓡ</SUP> S/W package and finally we got improved water-cooling tube design than normally used process in present industry. The optimal water-cooling tube length should be 200mm. The result will be adopted at real industry.