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노희전 (Heejeon Noh),주영덕 (Youngduk Ju),김진 (Jin Kim) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.6
Energy cost saving and energy savings in buildings aims to integrate systems and algorithms have been developed. Applied on a trial basis in a building that uses energy efficient equipment and building facilities for operating and application of algorithms that can save energy and reduce energy costs by using ice thermal storage system for the study was conducted. In this study, in order to reduce the cost of building energy use in selected test-bed facilities were integrated into one control system. Optimal control system for each facility by the use of energy savings by reducing overall energy usage and time, considering the optimization of energy use through the use of more energy costs.
노희전(Heejeon Noh),주영덕(Youngduk Ju),김진(Jin Kim) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
The present study has been conducted about application way of control algorithm. Energy saving, CO2 emission and operating coast reduction can be expected that by proper operation of facilities. Main function of Energy Management System are energy usage monitoring, analysis, prediction and control. The control logics are as follow: ZEB(Zero Energy Band) / Load reset, Duty Cycle, Enthalpy control, Optimum start, Optimum stop, Night purge, Night cycle, and CO2 concentration control, also many theories have been developed. In this study, we studied facilities for efficient operation of building energy consumption facilities and application of control algorithm.
CO₂2 에어컨 시스템을 위한 고압재설정알고리즘의 성능분석
한도영(Doyoung Han),노희전(Heejeon Noh) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2
In order to protect the environment from the refrigerant pollution, the CO₂ may be regarded as one of the most attractive alternative refrigerants for an automotive air-conditioning system. Control methods for a CO₂ system should be different because of the unique property of a CO₂ as a refrigerant. Especially, the high-side pressure of a CO₂ system should be controlled for the efficient operation. The high-side pressure algorithm being composed of the pressure setpoint algorithm and the pressure setpoint reset algorithm was developed. The pressure setpoint algorithm, by using a least square method, was developed. The pressure setpoint reset algorithm, by using a fuzzy logic and by using a proportional logic, was also developed and compared. Simulation results showed that a proportional logic was more practical than a fuzzy logic for the pressure setpoint reset algorithm.
한도영(Doyoung Han),노희전(Heejeon Noh),원재영(Jaeyoung Won) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2
In order to improve the efficiency of the main transformer in a tilting train, the optimal operation of a cooling system is necessary. For the development of the optimal control algorithm of a cooling system, the mathematical model of a main transformer cooling system was developed. This includes the dynamic model of a main transformer, an oil pump, an oil cooler and a blower. The system algorithm of a cooling system, which consists of the temperature setpoint algorithm and the temperature control algorithm, was developed. Optimal oil temperatures of the inlet and the outlet of the main transformer were obtained by considering the total electric power consumption of the system. The oil inlet temperature was controlled by the blower and the oil outlet temperature was controlled by the oil pump. A simulation program was developed by using the mathematical model and the system algorithm. Simulation results showed that the system algorithm developed from this study may be effectively used to control the main transformer cooling system in a tilting train.