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1D 해석을 통한 배터리 냉각 시스템 성능에 관한 연구
박근서(Keunseo Park),임혜수(Hyesu Lim),공태윤(Taeyun Kong),김화성(Hwasung Kim),김충영(Chungyoung Kim),권태석(Taesuk Kwon) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
An investigation on battery cooling system has been conducted using 1D simulation. Commercial Software, KULI, is used for estimation of cooling performance with various battery conditions in this study. For investigation of the battery cooling system, some 1D modeling had been developed and various parametric studies had been conducted. Some specific current values according to driving condition were engaged in the simulation model to estimate cooling performance of this system. The simulations indicate that current cooling system meet the target (under 45℃) when driving conditions like US06, HW and the fastest speed mode and that environmental temperature is also can be critical design factor since an effect of natural convection was pretty critical when we consider natural convection.
DEA를 활용한 친환경차량의 전생애주기를 고려한 에코효율성 평가방법에 관한 연구
박근서(Keunseo Park),최경현(Gyunghyun Choi) 한국기술혁신학회 2024 기술혁신학회지 Vol.27 No.1
Eco-efficiency is a consistent tool towards the transition to sustainable development, applied to all business aspects and linked to the economic and environmental performance of the system to find the most efficient alternatives. Meanwhile, carbon dioxide, the main cause of greenhouse gases, is also generated when a vehicle is running, during the vehicle manufacturing process, and during the production of fuel and electricity. Therefore, the direction of environmental regulations is expanding to full-process regulations that encompass the life cycle of products, including production, use, disposal, and recycling. However, existing studies on the eco-efficiency of automobiles are limited, and studies that consider the life cycle are difficult to find. In this study, we proposed a method to evaluate the eco-efficiency of eco-friendly vehicles considering the life cycle. As a result of the experiment, it was confirmed that the DEA evaluation method considering the life cycle can reliably distinguish between efficient and inefficient vehicles and suggest benchmarking targets and paths for each stage of the life cycle to improve eco-efficiency for inefficient vehicles.
배터리냉각시스템 냉각성능 예측을 위한 열전달 모델 개발
임혜수(Hyesu Lim),김화성(Hwasung Kim),공태윤(Taeyun Kong),박근서(Keunseo Park),김충영(Chungyoung Kim),권태석(Taesuk Kwon) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
In recent years, high-voltage batteries of electric vehicles have been in the spotlight as high-efficiency cooling technology capable of coping with high cell heating as high output and large capacity are inevitable due to an increase in travel distance and shortening of rapid charge time. Battery cooling technology of next-generation electric vehicles is changing between indirect-refrigerant based cooling using water-glycol coolant as cooling fluid and direct-refrigerant cooling type. It is important to predict cooling performance and battery cell temperature distribution to develop new battery cooling system. In this paper, 1D analysis model based on thermal resistance network method was developed through EES(Engineering Equation Solver) and system cooling load, cell temperature distribution, and outlet condition of cooling fluid were confirmed. As a result, the error between test data and the analytical model was within 12% at maximum, and it was confirmed that direct-refrigerant cooling reaches target temperature compared to that of indirect cooling.