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심냉 증류를 통한 전자급 고순도 이산화탄소의 분리 공정에 대한 전산 모사 연구
박일수(ILSU PARK),문흥만(HUNGMAN MOON),조정호(JUNGHO CHO) 한국수소및신에너지학회 2023 한국수소 및 신에너지학회논문집 Vol.34 No.1
In this study, a computer simulation work has been performed for the separation of electronic grade highly pure carbon dioxide more than 7 N purity through a cryogenic distillation process. For the cold utility as a cooling medium for a condenser of the cryogenic distillation column, propylene was utilized as a refrigerant in the vapor-recompression refrigeration cycle. Through this work, it was concluded that the cryogenic distillation column with two stage compression and refrigeration cycle were essential to obtain a highly-pure liquefied CO₂.
김영석(Youngseok Kim),홍승서(Sungseo Hong),채종길(Jonggil Chae),이보형(Bohyeong Lee),문흥만(Hungman Moon),최형철(Hyungchul Choi) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.11
In this study, the local ground freezing equipments and systems was developed for freezing sampling of saturated soil and its performance was evaluated at the pilot-scale. As a result of test under the freezing pipe filled with liquid nitrogen, the frozen soil column of 60cm diameter was made after about 20 hours and the average freezing velocity was approximately 12mm/h.