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사무소 건물의 방위별 유리의 선택적 적용을 통한 냉난방부하 절감 방안
송일학(Song Il-Hak),권세림(Kwon Se-Lim),송규동(Song Kyoo-Dong) 한국건축친환경설비학회 2012 한국건축친환경설비학회 학술발표대회 논문집 Vol.2012 No.3
Various design factors of the building are requires for saving energy. Glazing can be a good alternative of reducing excessive load of heating and cooling especially in office buildings with high WWR(Window Wall Ratio). In this study, Window 6.0 program developed in LBNL was used to analyze the glazing and EnergyPlus 6.0 developed in DOE was used to predict heating, cooling load. 12 cases of glazing were used selectively including double low-emissivity glazing, double tinted glazing, double reflective glazing, and triple glazing. The results show that the savings of heating and cooling load due to an application of various glazing types with 8 orientations would be up to about 35% compared to double clear glazing in annual period.
상급종합병원 VAV 시스템의 송풍기 제어방식 비교에 따른 에너지 효율성에 관한 연구
송일학(Il Hak Song),이종호(Jong Ho Lhee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
Indoor comfort and energy saving are important factors in application of VAV system. In order to reduce the energy of VAV system, various control methods of fan can be applied. In this study, variable pitch control and VVVF(Variable Voltage Variable Frequency) control are compared. Experiments were conducted on the axial fan in the AHU operated by the tertiary hospital in Seoul, South Korea, and efficiency and power demand of the fan were derived. Based on the 85% of fan load, VVVF was effective in the low airflow range and variable pitch in high airflow range. Monthly energy consumption of the fan was 8.1% and 25.7% in August and November. In the target building, variable pitch was found to use more power overall than VVVF.
건축물에너지효율등급 인증현황분석을 통한 에너지 자립률 고찰
김기태(Ki-Tae Kim),장문기(Mun-Ki Jang),송일학(Il-Hak Song),김성민(Sung-Min Kim) 한국건축친환경설비학회 2017 한국건축친환경설비학회 논문집 Vol.11 No.4
This study provides basic data for implementing zero energy buildings. The targets were analyzed for buildings with buildings in the building energy efficiency rating of 1 ++ or higher. The target building is classified as a passive and active element. The passive element analyses thermal transmittance values for walls, windows, roofs, and floors. And the active element analyzed heating, cooling, hot water supply and new renewable energy. Based on the analysis results, the status of the building was reviewed through box-plot. also Renewable energy sources in solar and geothermal systems have calculated energy output. Most of the target buildings were rated below the minimum grade. To implement zero energy buildings, Improved insulation performance for minimizing the load of buildings and requires an active system design for optimum operation. Based on this study, we will conduct a study on the optimal design of passive and active elements for implementing zero energy buildings.