• 융합정보논문지
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• 제9권1호
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• pp.54-60
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• 2019

최근 기후변화로 인한 외부 열환경이 악화되고 있으며, 이로인한 건축물에너지사용량이 상승하고 있다. 기후변화 대응형 건축물 저에너지 기술 성능평가를 위하여 Energy Plus를 활용하였다. 실험군 유형은 기본건축물(Control)과 기화냉각시스템(EMS)이며, 유형별 분석결과를 비교하였다. 에너지성능평가결과 냉방피크부하는 Control 대비 EMS에서 약 9% 이상 저감률을 보였다. 단위면적당 연간 냉방부하는 Control 대비 EMS에서 약 17% 이상 저감률을 나타내었다. 단위면적당 연간 에너지사용량은 Control 대비 EMS에서 약 10% 이상 저감률을 보였다. 따라서 건축물 에너지저감기술로 기화냉각시스템의 효과는 양호한 것으로 판단되었으며, 향후 기화냉각시스템의 분사량 및 이격거리에 따른 건축물에너지성능평가 연구가 진행되어야 할 것이다.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2009년도 추계학술발표대회 논문집
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• pp.32-37
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• 2009

An energy loss through the window system occupies about 10 to 30 percent on energy consumption of the whole building. That is the reason, several elements for a building composition of window system are the weakest from the heat. Insulation performance increases for the reducing heat loss. Heat transfer through the window system that is reducing heat transfer through conduction, convection and radiation. Insulation performance reinforcement methods classify improving heat specific quality of window system and improving efficiency of whole window system. The most application method among each methods is reducing emission ratio of the window system(Low-E glass), increasing a number of glazing(multiple window) and a method of vacuuming between glazing and glazing. Therefore this study is investigated a sort of glazing and specific character, U-value calculation with changing glazing thickness and calculation of temperature distribution and U-value with a glazing charging gas kind from double glazing. For a conclusion, an aspect of U-value figure at the smallest value case of vacuum glazing with Low-E coating. That means insulation efficiency is the best advantage during a building plan selecting vacuum glazing with Low-E coating for a energy saving aspect. In this way, U-value become different the number of glazing, coating whether or not and selecting injection gas. Therefore selecting of glazing is very important after due consideration by a characteristic and use of building and consideration of strong point and weak point.

• 설비공학논문집
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• 제28권4호
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• pp.137-144
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• 2016

Commercial buildings account for a significant proportion of the total building energy use in Korea, and cooling energy, in turn, accounts for the largest proportion of total energy consumption in commercial buildings. Under this circumstance, chiller staging is considered to be a reasonable and practical solution for cooling energy saving. In this study, the part-load ratio and the operating characteristics of a vapor compression chiller were analysed within an office building. In addition, energy consumption among different chiller staging schemes was comparatively analysed. As a result, significant proportions of total operating hours, cooling load and energy consumption turned out to be in the part load ratio range from 0% through 50%, and thus energy consumption was significantly affected by the chiller COP at low part-load conditions, indicating that the chiller operation at the part-load is an important factor in commercial buildings. In addition, utilizing a sequential chiller staging scheme can reduce the annual cooling energy usage by more than 10.3% compared to operating a single chiller.

• Wind and Structures
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• 제6권5호
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• pp.403-418
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• 2003

This paper presents an extensive analysis of the short term, unsteady wind loading on a low-rise building. The building is located in a rural environment and only the specific situation of wind flow orthogonal to the long face of the structure is considered. The data is analysed using conventional analysis and less traditional methods such as conditional sampling and wavelet analysis. The nature of the flow field over the building is found to be highly unsteady and complex. Fluctuating pressures on the windward wall are shown to a large extent to be caused by the fluctuations in the upstream flow, whereas extreme pressures on the roof are as a result of high intensity small scale flow structures. On the roof of the building a significant amount of energy is shown to exist at frequencies above 1 Hz.

• Structural Monitoring and Maintenance
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• 제5권2호
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• pp.189-204
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• 2018

This paper examines the seismic responses of a reinforced concrete (RC) frame core-tube building with pre-pressed spring self-centering energy dissipation (PS-SCED) braces. The PS-SCED brace system consists of friction devices for energy dissipation, pre-pressed combination disc springs for self-centering and tube members as guiding elements. A constitutive model of self-centering flag-shaped hysteresis for PS-SCED brace is developed to better simulate the seismic responses of the RC frame core-tube building with PS-SCED braces, which is also verified by the tests of two braces under low cyclic reversed loading. Results indicate that the self-centering and energy dissipation capabilities are well predicted by the proposed constitutive model of the PS-SCED brace. The structure with PS-SCED braces presents similar peak story drift ratio, smaller peak acceleration, smaller base shear force and much smaller residual deformations as compared to the RC frame core-tube building with bucking-restrained braces (BRBs).

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.922-927
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• 2009

Due to the law of use of sustainable alternative energy recently legislated, many public institutions are ordered to use renewable energy. So it gets people's eyes on Geothermal energy system among other suggested renewable energy. Since there is hardly existence of a volcanic region, Geothermal heat pump system is generally used most in Korea. However, the important technology and materials are not localized and further, with only our technical skills it is arduous to popularize and develop Geothermal energy because of lack of revitalization related to the law and the regime for locally suitable Data-base. Moreover, an access of renewable energy is too much hard because of people's low interests about Geothermal energy. But fortunately, the well-studied about Geothermal heat system started to be adopted in many other provinces. Therefore, we study this with intend to popularize and develop Geothermal energy.

• 설비공학논문집
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• 제25권6호
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• pp.338-345
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• 2013

The purpose of this study is to analyze the correlation between the 'Fenestration Energy Consumption Efficiency Rating System' (hereafter referred to as FECERS) and building energy consumption. 'EnergyPlus' was used for the calculation of energy consumption in apartments and office buildings, according to FECERS's rating and SHGC. The result indicates that the FECERS has high correlation with apartments, but has low correlation with office buildings. Also, it indicates that office buildings have a large impact from SHGC, which is not reflected in the FECERS. Consequently, the FECERS needs to be improved, by adding optical properties to assessment items. Additional study is required to establish the fenestration rating system, which, on the basis of this work, has high relevance to building energy consumption.

• 한국태양에너지학회 논문집
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• 제29권3호
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• pp.66-72
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• 2009

As 'Low Carbon Green Building' is highly required, programs to evaluate building performance are actively and commonly used. For most of these programs, dynamic responses of buildings against external weather changes are very important. In order to simulate the programs, weather data of each region must be properly entered to estimate accurate amount of building energy consumption. To this end, the existing weather data and weather data of KSES were compared and analyzed to find out how weather changes. Energy load of Korea's standard houses was also analyzed based on this data. As a result, data corresponding to June ${\sim}$ September when cooling is supplied shows 23% of average increase with 30% of peak increase(June). On the other hand, data corresponding to November ${\sim}$ February when heating is supplied shows 29% of average decrease with 34% of peak decrease(November). Increase in cooling load and decrease in heating load in the above data comparison/analysis show that KSES 2009 data reflects increase in average temperature caused by global warming unlike the existing data. Increase in dry-bulb temperature depending on weather change of standard houses increases cooling load by 17% and decreases heating load by 36%

• 한국산학기술학회논문지
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• 제17권6호
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• pp.129-139
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• 2016

본 논문은 저에너지 건축물 보급을 활성화하기 위하여 시행되고 있는 국내외 인센티브 제도를 비교분석하고 이를 통하여 국내 저에너지 건축물 인센티브 제도의 개선을 모색하기 위한 목적으로 한국, 캐나다, 미국, 싱가폴의 국가단위, 지방정부단위 제도를 분석 대상으로 하였다. 인센티브 제도의 체계는 1) 인센티브 종류 및 수혜자의 규정, 2)성능기준 및 평가방식의 정립, 3) 통합설계지원, 4) 재원의 확보를 근간으로 구성된다. 한국을 제외한 모든 국가들이 통합설계에 참여하는 전문가에 대한 인센티브 제도를 도입하고 있으며, 신축 중심 인센티브가 리모델링 건축물을 포함하는 방향으로 전환되고 있다. 인센티브 제도의 근간인 성능기준은 각 프로그램이 속한 국가 또는 지방정부가 규정하는 통합에너지성능분석기준에 따라 통합성능에 따른 지원이 주를 이루고 있으며, 개별 기술에 대한 지원을 보완하여 지원 범위 확대 경향을 보이고 있다. 통합 성능의 경우에도 초기 시뮬레이션에 의한 검증에서 실제 에너지사용량에 의한 검증으로 전환되어 시공품질 및 건물운영에 점차적으로 비중을 강화하고 있다. 통합 디자인 자체에 대한 지원과 자료 데이터베이스를 운영하여 성능기반 건축물 시장으로의 빠른 재편과 신산업 육성을 기대하고 있다. 안정적인 제도 운영을 위하여 재원확보가 필수적인데, 세금이 가장 일반적이고, 에너지 사업자 지원 또는 에너지 사용량에 따른 누진제를 통해 재원을 확보하는 보다 적극적인 재원확보 방안도 제시되고 있다.

• 한국산업융합학회 논문집
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• 제22권5호
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• pp.499-509
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• 2019

This paper discusses energy use monitoring and analysis as part of a study on a low-cost energy supply management system that links an existing database with weather information with no real-time monitor for energy demand of buildings using renewable energy, generator and energy storage systems. This study is targeted at small and medium-sized buildings and aims to monitor energy use with a small number of sensors at low cost by applying an energy management system (EMS). The present study can help overcome the limitations of high-cost EMS applied to large commercial and public buildings. We developed current, indoor temperature and human motion sensors and installed them in an office of a company in a sample building. Through these sensors, we analyzed energy use patterns and the effects of weather information and human motion on the energy use. Furthermore, we analyzed the correlations between the total KEPCO energy use of the sample building and weather by comparing these two data. The results showed that the office energy use of a company was more affected by human motions than by weather information. The comparison between the total energy use of the Building and weather information found that external temperature had an effect on the energy use.