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성순경(Sun-Kyung Sung) 대한설비공학회 2016 설비공학 논문집 Vol.28 No.12
There have been many cases when an air curtain installed in the apartment could not remove the gases well, such as carbon dioxide and particles like as smoke, oils, and vapors generated during cooking to disperse pollutants into the room. This study used a numerical analysis to show how the pollutant-removing performance of the range hood is changed when the air curtain is installed front of the kitchen table. The result of this study was that when the air amount supplied by an air curtain through the slot was about 50% of the exhaust amount, the capturing efficiency of the range hood for pollutants increased 90% more than without an air curtain. Even when the amount of supplied air was small, the capturing efficiency improved markedly with the use of an upward air curtain. In case that the air flow rate of the slot was greater than 60%, the capturing efficiency decreased.
난방공간에서 에어커튼의 토출각도 변화에 따른 성능 변화
성순경(Sun-Kyung Sung) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.2
Air curtains are widely used for gates of shopping mall, warehouse, cold stores and refrigerated display cabinets. The purpose of the air curtain is to reduce the infiltration of outdoor air and heat loss from the air conditioning space to ambient air. The discharge angle of air curtain is very important as the sealing efficiency is affected by it. This paper presents a performance of single jet air curtain in heating space when the discharge angle of nozzle changes. A numerical simulation is used to study the influence of various parameters on the efficiency of the downward-blowing air curtain device which is installed inside of the wall above the door. The performance of the air curtain is evaluated by sealing efficiency which provides the assessment of the energy savings. A condition of discharge angle that has the highest sealing efficiency is proposed.
성순경(Sung, Sun-Kyung) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.1
본 연구의 목적은 난방공간에서 자연대류 방열기를 통한 방출열량이 방열기의 형상에 따라 어떤 특성을 가 지고 있는가 알기 위함이다. 이와 같은 전열특성을 알기 위하여 컴퓨터를 이용한 수치해석방법을 이용하였다. 방열기 의 폭이 길고 높이가 낮은 경우 바닥 위 0.5 m에서 2.7 m까지의 온도차는 적음을 알 수 있다. 이는 다른 경우 보다 난방공간에 좋은 열환경 조건을 만들어 주는 것을 보여준다. 장래에 실험적인 방법을 통하여 본 컴퓨터 수치해석 결 과의 타당성을 검증하고자 한다. The objective of this study is to find heat emission characteristics on the natural convection radiator in a heating system when the aspect ratio of radiator is changed. In addition the computer simulation method is used in order to find the characteristics of heat transfer. When the width of the radiator is long and the height of radiator is short, the temperature difference from the floor level 0.5m to about 2.7m above the floor is small. It shows that thermal environment in heating space is good than the other case. For the future, I hope to compare the results between the computer simulation and experimental method for reliability.
성순경(Sun-Kyung Sung) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.11
Air curtains are widely used in commercial and public buildings to replace solid doors where traffic of people is predicted. At doorways where the solid door is open continuously or intermittently, an air curtain may be installed in order to reduce the flow of heat and moisture from the enclosed space to the outside. The purpose of this paper is to predict isolation performance of the single-sided air curtain when the wind is blowing. For the study, a numerical simulation is used to find the influence of various jet velocities on the efficiency of the single-sided air curtain device which is mounted at the side of the doorway. The isolation performance of the single-sided air curtain is evaluated by sealing efficiency which provides the assessment of the infiltration air ratio. According to the result of this study, the single-sided air curtain has lower sealing efficiency than downward-blowing air curtain. Therefore, for energy conservation in heating space, the single-sided air curtain is not recommended because of its low effectiveness.