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그린카용 에어컨 압축기 모터 시스템의 열유동 해석에 관한 연구
정정훈(Jung Hun Jung),신윤혁(Yoon Hyuk Shin),김성철(Sung Chul Kim),조한삶(Han Sam Cho) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The Electrical driven air-conditioning compressor is driven by sources of battery power in a hybrid vehicle or electric vehicle. The electric compressor is operated efficiently and degree of freedom of configuration location is high. The heat generation of the motor inside the electric compressor of inverter built-in type is mainly cooled by refrigerant and there is not a problem, but the increased refrigerant temperature may affect the reduction of compression performance. Also, according to the surrounding environment and system operation condition, the inverter is the possibility of going over the temperature limits. Therefore, we performed thermal analysis of compressor motor system, and suggested enhancement points of heat dissipation structure.
캔드타입 전동 워터펌프의 열유동 특성 해석에 관한 연구
정정훈(Jung Hun Jung),김성철(Sung Chul Kim),김현철(Hyun Chul Kim),정도현(Do Hyun Jung),송현석(Seok Hyun Song),이승용(Seung Yong Lee),송형근(Hyeong Geun Song) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
An electric water pump for engine cooling system has an advantage which particularly in the cold start, the use of the electric water pump saves fuel and leads to a corresponding reduction in emissions. The canned type electric water pump without mechanical sealing elements was selected to meet the requirements for operational reliability and life. However, the electric water pump for internal combustion engine generates much more heat loss than for hybrid electric vehicle since it is operated by the electric power of high current and low voltage. In this study, the fluid flow and thermal characteristics of the canned type electric water pump as an inverter integrated water pump has been investigated under the effects of heat generation. The analysis conditions such as outdoor air temperature of 125℃, water pump speed of 6000 rpm, coolant temperature of 106℃ and coolant flow rate of 120 lpm was used as a standard condition. Therefore, flow fields and temperature distribution inside the water pump were obtained. Also, we checked the feasibility of the canned type electric water pump for engine cooling system.
정정훈(Jung Hun Jung),김성철(Sung Chul Kim),김현철(Hyun Chul Kim),원종필(Jong Phil Won),김욱(Wook Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The heat management of the in-wheel motor is the key challenge for an electric direct-drive in-wheel traction system. In this study, we carried out the analysis on the fluid flow and thermal characteristics of the motor under the effects of motor speed and heat generation. In the air cooling structure for the in-wheel motor, a contact surface on the housing is provided with a portion having protrusions to increase the heat transfer area. The cooling performance for the housing geometry having protrusions in the circumferential direction was investigated and analyzed. Therefore, we checked the feasibility of the air cooling system for in-wheel motor cooling.
인휠 모터 냉각 성능 향상을 위한 하우징 개선에 관한 연구
정정훈(Jung Hun Jung),신윤혁(Yoon Hyuk Shin),김성철(Sung Chul Kim) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The automobile of the future recently will be able to substitute the electric vehicle for the internal combustion engine, so the research is actively to in the process of advancing. The drive motor is one of the core parts which compose the electric vehicle. Especially, it is difficult to connect cooling water piping because the in-wheel motor is located within the wheel structure. This structure is very disadvantage for closed type and air cooling, so cooling design of motor housing is important. In this study, thermo-flow characteristics analysis of in-wheel motor for vehicles was performed in consideration of ram air effect. In order to improve cooling efficiency of the motor, we variously changed geometries of housing and observed the effects. As result, we found that the cooling efficiency is most excellent in case the cooling groove direction was same with air flow direction and arranged densely.
정정훈(Jung Hun Jung),김성철(Sung Chul Kim),김현철(Hyun Chul Kim),원종필(Jong Phil Won) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
In-Wheel motor for use as direct wheel drive for a vehicle is presented to investigate the fluid flow and thermal characteristics of the motor under the effects of motor speed and heat generation. In the air cooling structure for the in-wheel motor, a contact surface on the housing is provided with a portion having protrusions to increase the heat transfer area. In this study, the cooling performance for the housing geometry of the in-wheel motor was analyzed, and discussed how to enhance the performance as well.
보행자 보호용 높이 축소형 냉각모듈 성능 해석에 관한 연구
정정훈(Jung Hun Jung),김성철(Sung Chul Kim),김현철(Hyun Chul Kim),원종필(Jong Phil Won) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Novel Front End Module (FEM) with improved pedestrian protection is very important to reduce the severity of pedestrian injury. When a collision is happened, the FEM with downsized cooling module is required to reduce the risk of injury to the upper legs of adults and the heads of children. The FEM needs to have enough space (or distance) from hood to absorb the energy from any pedestrian collision. In this study, the performance of cooling module to cool the engine was investigated under height reduction. It is expected that the cooling module to meet the same cooling performance as conventional system needs for the improvement of system efficiency.