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Evaporator Icing 방지를 위한 차량용 에어컨 시스템 설계
김두훈(Doohoon Kim),김철희(Chul Hee Kim),한중만(Joong Man Han),김현규(Gyu Hyeon Kim) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
Evap. Icing problem is one of the most serious problem occurred in driving condition. Many of the vehicle OEMs and climate system suppliers are studying and making an effort to prevent the icing problem. It needs many considerations for environment condition, compressor type, Evap. temperature distribution, HVAC case and component design, Control module logics, etc. And each item is not independent, has cross correlation each other. Therefore, system development engineer need to have enough understanding for A/C & HVAC system and should find the most effective countermeasure. Lastly, final A/C system design has to meet cooling performance, comfort, controllability and other requirement. This study focused on Evap. sensor, including decision of sensor position, setting value and sensor characteristics. This paper explains icing phenomenon and main considerations. It also shows examples about how to analyze test data, to access to countermeasure, and to find the effective solution. Finally, it will provide a few proposals to prevent the Icing of Evap.
손영욱(Sohn Youngwook),김두훈(Kim Doohoon) 한국퍼실리티매니지먼트학회 1999 한국퍼실리티매니지먼트학회지 Vol.1 No.1
This paper is a survey of domestic office environment. The purpose of this survey is to investigate the trend of the recent activities for improving office environment in domestic companies. According to the results of the survey, all of the office environment indice are very low. These mean that the top managers/office workers do not recognize the importance of office productivity. In this paper, it is proposed to promote the movement of office environment betterment for improving office productivity.
강호식(Sim, Sangdeok),송오섭(Kang, Hoshik),김영찬(Song, Ohseop),김두훈(Kim, Youngchan),심상덕(Kim, Doohoon) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.4
A linear motor damper based on the linear motor principle is developed to suppress structural vibration. This paper deals with the design, analysis, and manufacture of the linear motor damper. It is designed to be able to move the auxiliary mass of 1500kg, up to $\pm250mm$ stroke. The control algorithm was designed based on LQG control logic with acceleration feedback. Through performance tests, it was confirmed that the developed hybrid mass damper has reliable feasibility as a control device for structural control. In addition, the linear motor damper is more economical than both hydraulic and electric motor driving mass damper with respect to simple structure and low maintenance cost. A series of performance tests of the linear motor damper system were carried out on the full-scale steel frame structure in UNISON Corporation. Through the performance tests, it was confirmed that acceleration levels are reduced down 10dB for first mode of structure