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수치해석을 통한 겨울철 자동차 전면유리 제상성능 제어인자 연구
윤영묵(Young-Muk Youn),이금배(Kum-Bae Lee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Recently, much attention has been paid in the field of defrosting because clear windshield without effecting the thermal comfort realized is essentially. From the review of literatures, it is evident that in earlier days people just think about the driving performance, but now a days HVAC system has been given priority importantly. People like not only the convenient transportation but also the comfortable feeling with dwelling culture. In winter, defrosting performance is one of the important factor in vehicle design to make certain driver's view. In this study shows results of 3-D numerical investigation of defrosting performance change according to the change of control factors which are the change of defrost injection angle, the change of distance from windshield. Results show good performance of defrosting for θ, defrosting nozzle angle in the range of 15° and 25° and in case moving the defrost nozzle to windshield direction more faster velocity distribution was displayed. In case moving the defrost nozzle to automobile interior, rather the automobile inside temperature was rapidly increased.
수치해석을 통한 자동차 전면유리 제상성능 제어인자 연구
윤영묵(Young-muk Youn),Md. Faisal Kader,이금배(Kum-Bae Lee),전용두(Yong-Du Jun) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.12
Recently, much attention has been paid in the field of defrosting because clear windshield in vehicle without effecting the thermal comfort is realized essentially. Then in winter, defrosting performance is one of the important factors in vehicle design to make certain driver’s view. In this study, the velocity profile, temperature distribution and frost melting pattern on the windshield screen have been predicted in three dimensional geometry of an automobile interior. Numerical analyses predict a detailed description of fluid flow and temperature patterns on the inside windshield screen, utilizing the flow through defroster nozzle. Numerical prediction established a good defrosting performance with the standard distance ratio and the defroster nozzle angle ranging from 30° to 40°, which satisfy the condition of National Highway Traffic Safety Administration (NHTSA) completely.
여름철 HVAC System 작동시 자동차 실내의 온도분포 특성
전희호(Hee-Ho Jean),윤영묵(Young-Muk Youn),이금배(Kum-Bae Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
In this life, drivers and passengers should create HVAC environment in the automobile interior which is not only for convenient transportation but also for comfortable feeling with dwelling culture. The latest automobiles give much importance for the role of HVAC system that controls the environment of the area for passengers more than just basic capability. There are some factors like solar radiant heat, surface temperature, air conditioning system(temperature, humidity, air current, velocity), and dust for the factor which have an effect on the HVAC environment in the automobile interior, and these are being carried for the HVAC environment delivered an individual character. In this study, we drew the automobile interior as three dimension and arranged a method of numerical analysis on HVAC environment in the automobile interior through displaying temperature distribution of automobile interior according to temperature and velocity of air condition and compared with experimental values.
이금배(Kum-Bae Lee),윤영묵(Young-muk Youn),전희호(Hee-Ho Jun),박진양(Jin-Yang Park),고석보(Seok-Bo Ko) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6
In recent years the importance of the preservation of cultural artefacts like ancient tombs has been widely accepted domestically and internationally as the quality of life improves. However not much technical attention has been paid for the facilities and systems to preserve those artefacts. Even the general understanding of the preservatory environment of the underground space as tombs is poor. As a part of the present study, the temperature and relative humidity inside a selected artefact, Shinkwan-ri tomb, have been monitored for a year round by the present author to improve the understanding of the indoor thermal environment, is pursued to provide a predictive tool of numerical modelling of Shinkwan-ri tomb the opened underground space thermal environment. In this study, predictive numerical modelling of Shinkwan-ri tomb using the Computational Fluid Dynamics, calculate the velocity and temperature distribution and offer basic data which are necessary for the best fitted design of tomb air-conditioning device.
박진양(Jin-Yang Park),고석보(Seok-Bo Ko),전희호(Hee-Ho Jun),윤영묵(Young-muk Youn),이금배(Kum-Bae Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
In recent years the importance of the preservation of cultural artifacts like ancient tombs has been widely accepted domestically and internationally as the quality of life improves. However, not much attention has been paid for the facilities and systems to preserve those artifacts. Researchers have recently begun addressing the above issue and developing suitable system for the tomb conservation in Republic of Korea. In the present study, an duct-type HVAC system for a tomb (D×W×H=1.3m×3.0m×1.2m) was installed to maintain suitable indoor conditions for conservation of tomb. The temperature, humidity and condensed water inside the tomb are measured to estimate the dehumidification loads while the temperature and the humidity inside the tombs were maintained during the rainy season.
전용두(Yong-Du Jun),이금배(Kum-Bae Lee),박진양(Jin-Yang Park),고석보(Seok-Bo Ko),전희호(Hee-Ho Jun),윤영묵(Young-muk Youn) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6
Although the importance of good conservation of historic sites including ancient royal tombs is well aware, still not much attention has been paid for the facilities and systems to preserve those historic sites, which includes precious artifacts as wall paints and carved works, etc. Even the level of general understanding about the environment of the underground space of tombs is not satisfactory. In Korea, researchers have recently begun addressing the importance of maintaining proper environment for underground space as of ancient tombs and are making efforts to develop suitable HVAC(heating, ventilating and air-conditioning) systems for them. In this study, an HVAC system for a tomb (D×W×H=1.3m×3.0m×1.2m) was installed to maintain suitable indoor conditions for conservation of tomb. The temperature and humidity inside the tomb were measured to represent the performance of the installed duct-type HVAC system. Vibration levels due to the installed an HVAC system are alive investigated experimentally. According to the measured data, the level of vibration inside the present model tomb with the duct-type unit showed significantly lower values than the case with the indoor unit inside.