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성남철(Seong, Nam-Chul),홍구표(Hong, Goopyo) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
The purpose of this study is to evaluate the energy consumption of university buildings according to the HVac system type. In order to evaluate energy consumption, the target building was modeled using EnergyPlus and then simulated to compare energy consumption. As a result of comparing energy consumption, it was found that the energy consumption of conventional AHU systems was 14.5% less than that of VRF systems. Further research is needed by reviewing the detailed input conditions of the system.
PMV지표를 이용한 공동주택의 난방제어에 따른 온열환경 및 에너지소비 특성에 관한 연구
성남철(Seong Nam Chul),홍성민(Hong Sung-Min),윤동원(Yoon Dong Won) 한국건축친환경설비학회 2010 한국건축친환경설비학회 학술발표대회 논문집 Vol.2010 No.10
Usually, Indoor thermal environment is controlled by temperature with wall mounted thermostat. Indoor temperature control could not be provided the thermal comfort at all the time because thermal comfort is influenced by many parameters of environment such as temperature, relative humidity, air velocity, activity level, clothing insulation and radiant temperature. The purpose of this study is that predicted mean vote(PMV) would be available as index as control parameter. And, Thermal comfort is evaluated both PMV control and temperature control by simulation and several cases were compared, in which the set-point temperature range of between 22℃ and 24℃ and, set-point PMV index through the respective heating season in the simulation. The results show that PMV control is better to maintain human comfort condition and to save the energy than ordinary set-point temperature. It is time to foster a comfortable indoor environment, while minimizing the energy consumption of building systems. The thermal comfort provides satisfaction of thermal environment and affects productivity of occupants in residential building.
초고층 주거용 건물에서 폐열회수형 환기시스템을 이용한 외기냉방 적용성 평가
성남철(Seong, Nam Chul),홍성민(Hong, Sung-Min),최성균(Choi, Sung-Kyun),윤동원(Yoon, Dong-Won),오석훈(Oh, Suk-Hoon) 한국건축친환경설비학회 2012 한국건축친환경설비학회 학술발표대회 논문집 Vol.2012 No.10
Outdoor Air Cooling offers a variety benefit as to decrease outdoor air loads and cooling energy consumptions. This study conduct in to establish outdoor air intake control strategy and to analyze cooling demand period in the high-rise residential buildings for evaluation of applicability of outdoor air cooling using the heat recovery ventilation system. As a result of simulation, approximately, applied outdoor air cooling control, cooling demand period decreases 12 percent during one year.
유전알고리즘을 이용한 중앙공조시스템 냉수배관계의 최적제어 방법
성남철(Seong, Nam-Chul),김지헌(Kim, Jee-Heon),최원창(Choi, Won-Chang) 한국건축친환경설비학회 2020 한국건축친환경설비학회 논문집 Vol.14 No.1
This paper suggests the real-time optimal control method of central air-conditioning system using chilled water. The control variables for optimization are differential pressure of the pump and the supply chilled water temperature supplied to the air conditioning system produced from the central chiller. The optimal control variables of the control point are calculated using genetic algorithm in one-hour time step. The objective function of algorithm was the energy consumption of the HVAC system, and the energy consumption was calculated using the mathematical model. The results of the operation of the normal mode under the initial design conditions and the optimal operation mode with the optimal control variables were evaluated by comparing the energy consumption of the HVAC system with the variation of the control volume at the control point selected in this study. As a result, the chilled water supply temperature of the chilled water loop was operated by changing between approximately 9℃ and the differential pressure of the pump between 34.87 ㎪ and 78.91 kPa for the optimal control method. The total energy consumption of the HVAC system during optimal control operation was reduced by 16.98% compared to operation of the normal mode.
성남철(Seong, Nam Chul),김지헌(Kim, Jee-hern),윤동원(Yoon, Dong-won) 한국건축친환경설비학회 2014 한국건축친환경설비학회 논문집 Vol.8 No.6
The underground utility tunnel is a very important infrastructure in modern urbanization. The purpose of this study is to establish a database for the environmental information of underground utility tunnels by measuring the temperature, humidity, surface temperature and air velocity in underground utility tunnels, and to use it as base data for maintaining and design. The underground utility tunnel located at Inchon, Korea was selected as the subject for the study. The point of measurement was the halfway point between the inlet and outlet of the utility tunnel. The air velocity with and without mechanical ventilation operation were compared and they were summarized. As a result of measuring the underground utility tunnel which was the subject of this study, it is considered that there will be almost no risk factor such as the weakening of structural durability, corrosion of indoor facilities and electric leakage of electric power facilities because the normal conditions. However, it is necessary to establish a database by collecting more data and additional measurement during spring, summer season.
공동주택에서 쾌적지표를 활용한 난방제어 시 온영환경 변화와 에너지소비 특성에 관한 연구
성남철(Nam Chul Seong),윤동원(Dong-Won Yoon) 한국생활환경학회 2010 한국생활환경학회지 Vol.17 No.6
The thermal comfort provides satisfaction of thermal environment and affects productivity of occupants in residential building. So, it is time to foster a comfortable indoor environment, while minimizing the energy consumption of building systems. However, Indoor thermal environment is controlled by temperature with wall mounted thermostat in usual. Indoor temperature control could not be provided the thermal comfort at all the time because thermal comfort is influenced by many parameters of environment such as temperature, relative humidity, air velocity, activity level, clothing insulation and radiant temperature. The purpose of this study is that predicted mean vote (PMV) would be available as index as control parameter. Energy consumption and Thermal comfort are evaluated both PMV control and temperature control by simulation and several cases were compared, in which the set-point temperature range of between 22℃ and 24℃ and, set-point PMV index through the respective heating season in the simulation. As a result, PMV control is better to maintain human comfort condition and to save the energy than ordinary set-point temperature.
인공신경망을 이용한 건물의 에너지 모델 최적화 알고리즘 개발 및 검증에 관한 연구
성남철(Nam Chul Seong),김지헌(Jee-Hern Kim),최원창(Wonchang Choi),윤상천(Sang-Chun Yoon),Nabil Nassif 한국생활환경학회 2017 한국생활환경학회지 Vol.24 No.1
This paper discusses the modeling methodologies and optimization methods for building energy system using time series auto regression artificial neural networks. The model can be integrated into energy solution tools for building energy assessment, optimization, and many other applications. The model predicts whole building energy consumptions as function of four input variables, dry bulb and wet bulb outdoor air temperatures, hour of day and type of day. To train and test the models, data from simulations are used for the analysis. Advanced computational methods are used for data analysis and preprocessing. Different neural network structures are tested along with various input and feedback delays to determine the one yielding the best results. The optimization method was also developed to automate the process of finding the best model structure that can produce the best accurate prediction against the actual data. The results show that the developed model can provide results sufficiently accurate for its use in various energy efficiency and saving estimation applications.