http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김홍욱(Kim Hong Wook),이광호(Lee Kwang Ho),손장열(Sohn Jang Yeul) 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
The aim of this research is to compare and analyze emitting characteristic of pollutant by current finishing materials and finishes which emits less polluted substance. A subject of analyze were VOCs, Formaldehyde, Radon and three different cases were studied to find characteristic of each. Measurements were taken continuously through a week by using small chamber system HAQT(hanyang air quality test). As the result of measurement, case which used liquefied ceramic and inorganic liquefied bonding agent, have reduced pollutant. Especially inorganic liquefied bonding agent not only reduced pollutant of material itself but also did great act reducing pollutant of concrete or other materials which it is spread on. Recently due to a invention of materials reducing pollutants, basic data of each materials needs to be compared and analyzed.
안내깃을 가지는 곡관유동에서 발생하는 압력손실에 관한 연구
오창민(Chang Minn Oh),김홍욱(Hong Wook Kim),김태호(Tae Ho Kim),김희동(Heuy Dong Kim) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
곡관에서 발생하는 부차손실은 주손실에 비하여 작아서 무시되어져 왔다. 그러나 최근에는 시스템 성능을 올리기 위하여, 부차손실의 감소가 중요한 이슈가 되었다. 곡관유동에서는 유동박리에 의한 2차 선회유동이 발생함으로 관 표면처리만으로 압력손실을 감소시킬 수 없다. 하지만 곡관부에 안내 깃을 설치함으로써 압력손실을 감소시킬 수 있다. 본 연구에서는 안내 깃의 설치 유무에 따른 곡관유동 특성에 대하여 수치해석적으로 조사하였다. 특히, 90°로 굽은 곡관 유동에 초점을 맞추었다. 수치해석을 위하여 k-ω SST 난류모델을 적용한 비압축성 RANS 식을 사용하였다. 또한 레이놀즈수와 안내깃의 영향을 조사하기 위하여 곡관 하류 위치에 따른 속도, 곡면의 압력 및 선회유동의 난류 에너지를 조사하였다. 본 연구의 결과로 안내 깃을 설치함으로써 압력손실이 감소하는 것을 알 수 있었다. The minor losses in the pipe bend flow are smaller than the major loss like friction loss in the pipe flow and have been ignored. However, in order to increase the system performance in recent years, a reduction of the minor losses has become an important issue. In the pipe bend flow, the pressure loss can not be reduced only by the surface treatment due to the flow separation and the secondary swirling flow. In this study, the pipe bend flow characteristics with or without the guide vane were investigated numerically. In order to investigate the effect of Reynolds number and the number of guide vane, the velocity, curvature pressure and turbulent energy of the swirling flow were investigated at the downstream of the bend flow. As a result of this study, it was found that the pressure loss was reduced by installing the guide vane.
사무소의 하계 슬랫각도 최적제어를 위한 ANN 모델 개발 및 부하저감 효과
이종만(Jong Man Lee),홍성협(Sung Hyup Hong),연상훈(Sang Hoon Yeon),김홍욱(Hong Wook Kim),이광호(Kwang Ho Lee) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
Windows are the only part of a building that can directly penetrate the solar radiation into the space and thus the shading devices are needed to control the solar penetration. A variety of research have been conducted to develop the optimized slat angle control in the existing literature, but the research incorporating artificial intelligence technique with slat angle control to consider dynamic operating conditions is limited thus far. Therefore, in this study, the ANN (Artificial Neural Network) model was applied to minimize the combined total load consisting of lighting and cooling loads through automatic slat angle control of venetian blinds. A three-story rectangular office building was simulated using EnergyPlus, and dimming control was applied to control the lighting. The interlocked simulation between Matlab and EnergyPlus was conducted through BCVTB. As a result of comparing automatic blind control via the ANN to fixed blind slat angle, the automatic blind control via the ANN showed 10.8% lower total load than the blind angle fixed at 40°. It was confirmed that the cooling and lighting load could be reduced by real-time automatic control via the ANN under various operating conditions, rather than fixing the blinds at one angle.
손정은(Jeong-Eun Son),유병호(Byeong-Ho Yu),김홍욱(Hong-Wook Kim),이광호(Kwang Ho Lee) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
Properly controlled UFAD systems under cooling operation produce thermal stratification exhausting the conditioned-air supplied from floor diffuser to the return plenum after removing the heat load of occupied zone. Thermal stratification is one of the important features of UFAD systems; it eliminates the necessity to consider heat from convection that occur in areas other than lower occupied zone. Hence, the system is more energy effective compared to conventional overhead systems that presume the entire space as an air conditioning space. Thus, enhancing the thermal stratification is necessary for the UFAD systems performance. In this study, we assess the UFAD energy performance by considering the thermal stratification as an input variable through the EnergyPlus simulation. As a result, enhancing thermal stratification improves the cooling energy saving potential by more than 15% as expected. On the other hand, the reduction of thermal stratification causes the increase in supply air volume so that air conditioning of occupied zone as well as upper mixed zone is needed.
사무소 건물의 창면적비와 향에 따른 슬랫형 블라인드의 최적 슬랫 각도 제어 알고리즘
권혁주(Hyuk Ju Kwon),이금호(Keum Ho Lee),김홍욱(Hong Wook Kim),이광호(Kwang Ho Lee) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
Most modern office buildings adopt the curtain wall system in order to provide occupants with the sense of openness and high-technology, which requires large window area. As a result, the amount of solar radiation increases, negatively affecting cooling load during the summer and increasing energy costs. However, the performance of window itself is not sufficiently controllable parameter to control thermal comfort and solar radiation. Therefore, a shading device such as venetian blind is required to control them and thus a variety of studies have been performed. thus far Among various input variables for the control of venetian blinds, the vertical solar radiation has been selected in this study as the primary input variable and the optimal control algorithm for venetian blinds were developed for each window-to-wall ratio and orientation. Eventually, the energy saving impact will be assessed based on this study.