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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.
성남철(Seong, Nam Chul),최원창(Choi, Wonchang) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
A model for predicting the supply air flow in the fan, which plays a important role in HVAC system, is to be developed using artificail neural network. The model of three cases was constructed according to the combination of the input data constituting the input data of the neural network, and the accuracy of each case model was evaluated through statistical approach (using mean square error), and the best performance model was determined. The input parameters includes flow rate, pressure, fan power consumption, outdoor air temperature, outdoor air humidity, supply air temperature and zone air temperature. The suggested model including seven input data shows the best performance.
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.
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.
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.