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최이철(Yicheol Choi),이원석(Wonsuk Lee),박만희(Manhee Park),최용현(Yonghyun Choi) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The main objective of this work is to investigate the performance characteristics of R134a Heat Pump System for the Battery Electric Vehicle. In this study, the performance characteristics of the Heat Pump System were analyzed for heating, and results for performance were provided for operating conditions when using recovered heat from the ambient above -10 degrees. The experimental work has done with variations of the electric compressor speed, front air velocity of exterior heat exchanger, and the ambient. The heating capacity of the interior heat exchanger was measured up to 5.6 ㎾.
최두열(Duyoul Choi),김철민(Chulmin Kim),최이철(Yicheol Choi),이원석(Wonsuk Lee) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
There are some sensitive problems with developing Fuel Cell Vehicle. One of them is cooling system. As a lot of researchers already know, the coolant temperature of Fuel Cell Vehicle is lower than Internal Combustion Engine Vehicle. For this reason, cooling system of Fuel Cell Vehicle should have high flow water pump, extensive radiator and high power fan motor to maintain constant temperature level. Among these units, we have focused on high power fan motor which is operated by high voltage. As a result, we had developed HV BLDC fan motor using hall sensor. One step further, this paper presents the sensorless control on HV BLDC fan motor. Through this study, we have got equivalent performance compared to HV sensor type BLDC fan motor.
전기자동차 주행거리 향상을 위한 바이오에탄올 연소식히터를 적용한 난방시스템 개발
최두열(Duyoul Choi),이원석(Wonsuk Lee),김철민(Chulmin Kim),최이철(Yicheol Choi),심홍록(Hongrok Shim) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
The main objective of this paper is to develop heating system on battery electric vehicle for range enhancement. In general, PTC heater is widely used on battery electric vehicle. However, according to recent research, the range is reduced by more than 50% due to the amount of power consumption of PTC heater on battery electric vehicle. In order to resolve this problem, additional heating system was adopted in this study. The heating performance, power consumption and range enhancement were analyzed on battery electric vehicle by using bio-ethanol fire-operating heater. This experimental work has done at a low temperature in the wind tunnel. This work gets results that the heating performance is satisfied with target temperature, power consumption is saving 60% and the range is extended up to 53% compared to operating only PTC heater.