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디스펜서를 이용한 차량용 연료 탱크 수소 충전 모델링에 관한 연구
최지아,지상원,장지성 사단법인 유공압건설기계학회 2022 드라이브·컨트롤 Vol.19 No.2
Hydrogen energy as an alternative source of energy has been receiving tremendous support around the world, and research is being actively conducted accordingly. However, most of the studies focus on hydrogen storage tanks and only are few studies on interpreting the hydrogen filling system itself. In this study, with reference to SAE J2601, a hydrogen fueling protocol, a simulation model was developed that can confirm the behavior of the vehicle's internal tank during hydrogen fueling. With respect to factors such as fuel supply temperature, ambient temperature, and pressure increase rate, the developed model can check the change of temperature and pressure in the tank and the state of hydrogen charging during hydrogen fueling. The validity of the developed simulation model was confirmed by comparing the simulation results with the experimental results presented in SAE J2601.
MC 기법을 이용한 수소 탱크 충전 성능 향상에 관한 연구
최지아,지상원,장지성 한국수소및신에너지학회 2023 한국수소 및 신에너지학회논문집 Vol.34 No.5
SAE J2601, hydrogen fueling protocols, proposes two charging methods. The first is the table-based fueling protocol, and the second is the MC formula-based fueling protocol. Among them, MC formula-based fueling protocol calculates and supplies the target pressure and pressure ramp rate (PRR) using the pre-cooling temperature of the hydrogen and the physical parameters of the tank in the vehicle. The coefficient of the MC formula for deriving MC varies depending on the physical parameters of the tank in the vehicle. However, most studies use the MC coefficient derived from SAE J2601 as it is, despite the difference in the physical parameters of the tank applied to the study and the tank used to derive the MC coefficient from SAE J2601. In this study, the MC coefficient was derived by applying the hydrogen tank currently used, and the difference with the fueling performance using the MC coefficient proposed in SAE J2601 was verified. In addition, the difference was confirmed by comparing and analyzing the fueling performance of the table-based method currently used in hydrogen fueling stations and the MC formula-based method using MC coefficient derived in this study.
종가의 음식관광자원 가능성 연구 - 인제종가 팸투어 참가자 대상으로 -
최지아,이은주,Choi, Jia,Lee, Eun-Joo 한국식품영양학회 2014 韓國食品營養學會誌 Vol.27 No.6
The purpose of this research was to reveal how Jong Ga and its cuisine is perceived by Koreans and foreign tourists and to develop Jong Ga culinary culture for culinary tourism. The Inje Jong Ga was chosen since it is located in Jeonju, Hanok Village, which is a destination for tourists and gourmet enthusiasts. In-depth personal interviews were performed with Koreans and with foreign tourists who were visiting Korea. Interviews were done to provide deeper insight into the comments and subject matters. Most tourists selected "having one table setting for each (Doksang)" as the most distinctive part of Jong Ga and its cuisine. To develop the experience at a Jong Ga as a culinary destination, questionnaires were created to study six areas: preferences on length of stay, price range, food serving style, things to be improved, expectations by as a tourist at a Jong Ga, and the role of the food guide. Perceptions toward Jong Ga and its cuisine were generally positive, but the quality of service and lack of organization in establishments were perceived to be the negative factors.