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온실가스를 줄이기 위한 소형 냉동사이클 냉매 성능특성에 관한 연구
윤갑식(Gab-Sig Yoon) 산업기술교육훈련학회 2012 산업기술연구논문지 (JITR) Vol.17 No.3
Many countries are trying to figure out the development of friendly refrigerant according as recently environment contamination and global warming are becoming a main international issue. As CFC-12 refrigerant having been used for a long time is prohibited, R-134a, alternative refrigerant, which the index Ozone Depletion Potential, ODT is nearing zero has widely been used, but R-134a is regulated by Kyoto protocol because its GWP(Global Warming Potential) comes to 1300. Accordingly, the study shows the result of experimental comparison with characteristics between outdoor air temperature and compressor speed change by using aircondition system to know the usefulness probability of OS12a alternating R-134a.
윤갑식(Gab Sig Yoon) 산업기술교육훈련학회 2018 산업기술연구논문지 (JITR) Vol.23 No.3
Cyclones are widely used in vacuum cleaners. Dust and air spin around the cyclone at high speed and are separated due to the centrifugal force acting on the dust particles. This study aims to develop a single stage dust collector with two cyclone chambers to increase the dust separation efficiency. The dual cyclone dust collector will be designed asa compact cyclone with a high dust collection rate and low pressure loss, while maintaining the original performance, The new and original models will be compared. We have improved the base model by selecting optimum values of the cone angle and pneumatic flow rate.
윤갑식(Gab-Sig Yoon) 산업기술교육훈련학회 2017 산업기술연구논문지 (JITR) Vol.22 No.2
Refrigeration system has been widely used in almost all of the industries such as automobile, ship, skyscraper and huge chemical plant, including a small sized fridge. but it is a main effect of global warming. The global warming caused by the ozone layer destruction is a serious problem so to develop good refrigerants is necessary. In this study experiment characteristics of refrigerants, OS-12a and R407 were compared and studied wit h the temperature, pessure and rpm.