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건물 용도별 무선계측 최적 전파강도 산정을 위한 실험적 연구
이정재(Jurng-Jae Yee),최석용(Seok-Yong Choi),조수(Soo Cho) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.8
Researches and developments on BEMS are performed world-widely through sustainable management in various conditions. However, there are many obstacles to adapt the system in existing buildings because it needs highly expensive equipments, which are designed for newly built buildings, to install. Therefore, there are numerous limits exist when applying the BEMS in established buildings. The purpose of this study estimates the optimization of RF output power in WSN(Wireless Sensor Networks), which is the essential technology to develop PEMS. The results of this study is as follows;1) Applying WSN technique in buildings was possible. 2) As RF output power increases, the number of relay node reduced, therefore, the WSN showed more stability. 3) When estimating optimal RF output power in school, it should be considered between the number of relay node and RF output power. 4) Considering battery consumption and possibility of reception, the best suited RF output power is -20dbm in apartment house.
공동주택 전열교환 환기시스템의 에너지 절약적 외기도입 운전제어 방안에 관한 연구
이정재(Yee Jurng-Jae),김석근(Kim Seok-Keun) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.6
Recently, the ventilation system is required by law to satisfy minimum fresh air requirements, but this, in turn, inevitably forces the ventilation system itself to consume extra energy. Thus, there is an increasing need for an adequate control method for supplying outdoor air, which minimizes energy consumption while insuring that indoor air quality is efficiently maintained. Therefore, this study, it will propose a proper outdoor air supply control method in order to minimize energy consumption while effectively preserving IAQ. Results of this study are as follows : (1) It is necessary to avoid operating constant heat-exchange-mode throughout the year, which is common in apartment nowadays, and to switch to bypass-mode, depending on the condition of indoor and outdoor air, for energy conservational outdoor air supply in the ventilation system of apartments. It is also proved that outside air supply control should be determined by the dry bulb temperature instead of enthalpy, in order to be energy-efficient in apartments because apartments are usually not introducing an extra latent heat control method. (2) From the result of energy performance simulations for the heating & cooling loads used to propose a proper operating control method of the heat exchange ventilation system, it was found that using heat-exchange-mode by schedule control method in heating season and using bypass-mode by temperature sensor both in intermediate season and cooling season provided the largest energy savings. (3) The result also showed that adopting this method in weather conditions in Seoul city saved 16.4% of energy compared to the preexistent annual heat-exchange-mode.
주택용 환기시스템의 덕트설계를 위한 분배기 적용성 검토
이정재(Jurng-Jae Yee),최석용(Seok-Yong Choi),김석근(Seok-Keun Kim),김광현(Kwang-Hyun Kim),이영우(Young-Woo Lee),김환용(Hwan-Yong Kim) 대한설비공학회 2007 설비공학 논문집 Vol.19 No.11
Although these days application of heat recovery ventilation and improved kitchen ventilation system came into wide use in mixed-use residential buildings and exclusive residences, there are not enough ventilation systems except the local ventilation of kitchens and rest rooms. It is very important part to regulate and distribute correct air flow rate for controlling air change rate. The purpose of this study is to investigate the application of distributor at house ventilation system by comparing a duct system with out distributor and with distributor. The results of this study are as follows. (1) When using distributor though the size of duct diameter is reduced rapidly, the pressure loss doesn't rise largely. The pressure loss without distributor is 4.08 ㎜Aq, the pressure loss with distributor 4.10 ㎜Aq. (2) To use distributor can reduce materials of duct and secure enough ceiling space by reducing duct diameter. (3) Diameters and air flow paths of distributor on the design stage are important part for accurate air flow rate.
부산광역시 공동주택의 외피구조에 따른 에너지 소비특성 분석
이정재(Yee Jurng-Jae),김환용(Kim Hwan-Yong),김승희(Kim Seung-Hee) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.4
In this paper we made energy consumption units of glass curtain wall type apartment and general apartment in Busan metropolitan city and compared energy consumption characteristics by building envelope. The monthly electricity consumption units of general apartment were shown in the range of 1.16~1.51kWh/m<SUP>2</SUP>·mon which were indicated higher value in January, February, August and September with little variation. On the other hand, in case of glass curtain wall type apartment, monthly electricity consumption units were represented in the range of 1.91~7.07kWh/m<SUP>2</SUP>·mon with significant fluctuations monthly, which were outstandingly high in July, August and September. The monthly city gas consumption units of general apartment were found to be in the range of 1.79~18.07MJ/m<SUP>2</SUP>·mon, while glass curtain wall type apartment were with in 0.94~ 19.91MJ/m<SUP>2</SUP>·mon. City gas consumption units from December to March were shown highly in both type apartments. The monthly energy consumption units of general apartment were found to be within 14.23~30.69MJ/m<SUP>2</SUP>·mon, while glass curtain wall type apartment were within 24.49~68.9MJ/m<SUP>2</SUP>·mon. Energy consumption units of glass curtain wall type apartment were suggested 4.84 times higher than those of general apartment.