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김명회(Myunghoe Kim),강명훈(Myunghun Kang),이상신(Sangsin Lee),장병무(Byeongmoo Jang),배종식(Jongsik Bae) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
In relation to the vehicle air conditioning system, the recent trend is a trend that a growing number of complaints and requirements of the customers for rear seat. As you can see in the IQS and the Internet Community and Overseas Magazine assessment, complaint and requirements for comfort of rear seat it is not limited to large cars. The 4-Zone and 3-Zone system that can control rear seat independently application is required in order to meet these consumer desires. However, the system has high cost and difficult to apply for under midrange car. Therefore, it is necessary functionality is implemented, but the price is inexpensive entry-level systems development. So I started to research this theme, ‘A development of the entry-level console ventilation structure of floor mode’. It wants to improve through this study as follows. First, Heating Performance Improvement (IQS and VDS improvement), second, the number of parts and size reduction compared to existing structures(Cost and weight saving), Third, entry-level concept development(Extended to midrange cars)
루버휜-관 열교환기 형상변화에 따른 응축특성에 관한 연구
김명회(Myunghoe Kim),김해룡(Haeryong Kim),나원균(Weonkyun Na) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Experiments are carried out to investigate the heat transfer rate and pressure drop characteristics of the modified fin-tube heat exchanger having same flow path as the two row louver fin-tube heat exchanger using refrigerant R22. The heat exchangers used in the experiments are classified as two, one is fundamental type and the other is combination type of two-row heat exchanger which is consist of two one-row heat exchanger with intervals of 14 ㎜. According to the results, the combination type heat exchanger has higher outlet air temperature and condensation heat transfer rate than the fundamental type heat exchanger. However, The combination type heat exchanger has higher air pressure drop than the fundamental type. The combination type has also higher refrigerant pressure drop than the fundamental type.
차량 실내 쾌적성 향상을 위한 환기성능 최적화에 관한 연구
김명회(Myunghoe Kim),최재식(Jaesik Choi),배종식(Jongsik Bae),우창완(Changwan Woo) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this study, Experiments on compartment air flow are carried out on condition of forced ventilation and natural ventilation by using the laser visualization method. Targeted models are HKMC’s vehicles and their competitive ones. Experiments on 4door vehicle have performed changing and improving influence factor of ventilation performance and evaluated resulting values; Fogging generation performance, Defrosting performance and compartment static pressure. As a result of laser visualization, ‘air extractor grille’ and ‘rear package tray & rear glass gap’ have proven to be major factor deciding compartment air flow. Also, in case that air extractor grille was chosen among improvement factors and adopted two ones, we could achieve best results in tests on fogging generation performance, Defrosting performance, Compartment static pressure
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℃
김명회(Myunghoe Kim),구준모(Junmo Ku),한성석(Seongseok Han),정춘식(Jeongchun Shik) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
HVAC System is currently used for controlling of vehicle cabin temperature and mode. We are usually using semicenter type HVAC System. But semi-center type HVAC System has more package problem than center mount’g type HVAC System. This being so, when developing a new car, one of the repeated problems is the lack of storage space. In particular, the small size of the glove box is one of the biggest requirements from the consumer. In this study, optimizing center mount’g type HVAC System, could be decreased size, cost and weight. Additionally we could improve N.V.H(Noise, Vibration, Harshness) performance. We used DFSS method and made 18 variations of aspirators by L.I.S rectangular coordinate system. Also CFD analysis tool used FLUENT.
신기영(Geeyoung Shin),권동호(Dongho Kwon),김명회(Myunghoe Kim),한승식(Seungsik Han) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
As the era of fully autonomous driving approaches, the purpose of the vehicle will change from a vehicle to a living space like a home. For this, it is necessary to change the space in which the passengers stay. For this change, the indoor space is secured larger than before. To do this, the reduction of existing indoor parts is essential. It is thought that the change of the cockpit located in front of the current vehicle will be most prominent. For the change ofcockpit, the representative part that occupies the largest volume among the parts located inside It is a hvac system for indoor cooling/heating. This cooling/heating system has a direct effect on mileage It must be a system capable of responding to heat pump systems, and the interior volume must be reduced to respond to changes. For this, the temperature control door inside the hvac is removed, and the hvac system capable of constructing a heat pump system Development review.