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차량 난방 성능 향상을 위한 하이브리드 PTC 히터 적용에 관한 연구
구중삼(Jungsam Gu),오광헌(Kwanghun Oh),정순안(Sunan Jeong),왕윤호(Yoonho Wang) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Recently internal combustion engine’s efficiency has been improved dramatically from customer’s demand that is to get car of good fuel efficiency. But air conditioning side is necessarily lacking the heat source for heating cabin room due to the decreased waste heat from engine. For this reason, PTC heater has used as auxiliary heater. PTC heater was being applied to diesel engine to improve early thermal comfort in cold start and the application is being expanded into gasoline engine as well. In conventional PTC heater, HVAC package size increases due to separated structure from coolant heater. Also temperature distribution and heating performance decrease because PTC heater cannot cover overall effective area. So there is a demand of new technology which can improve heating performance. In this paper, the hybrid PTC heater’s heating performance is validated. The hybrid PTC heater consists of conventional coolant heater and new PTC heater with thin profile. In the structure, two heaters are integrated into one assembly with no gap. The hybrid PTC heater can compensate waste heat loss and improve HVAC package size.
김명회(Myunghoe Kim),구중삼,오광헌(Kwanghun Oh),장병무(Byeongmoo Jang),배종식(Jongsik Bae),Junmo Ku 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
Recently Car-maker has improved efficiency of engine because customers prefer car with increased fuel efficiency For this reason, PTC heater has been applied with diesel engine since past 10 year for heating performance. Furthermore heat source continually reduced in Gasoline engine because of improvement of gasoline engine efficiency. So PTC heater is also applied to Gasoline engine. Recently trend is to increase using of PTC heater. Like this PTC heater of auxiliary heater has been transformed into the main heater. But PTC heater has increasing HVAC package. Also, PTC heater has increasing temperature distribution and decreasing heating performance because cold air is bypassed. This paper is about studying hybrid PTC heater that is improved about disadvantages of PTC heater. Hybrid PTC heater is composed of an efficiently combination of thin PTC heater with coolant heater core. This paper presents experimental results of heating performance test at vehicle level. As a result, Hybrid PTC heater could improve interior temperature of vehicle about 0.9℃~3℃