• Research Article

    A Study on the Application Effect of Building Integrated Solar Power Generation according to the Window Area Ratio of Building

    건축물 창면적비에 따른 건물일체형 태양광 발전의 적용방안에 관한 연구

    Lee, Tae-Kyu, Kim, Jeoung-Uk

    이태규, 김정욱

    This study aimed at an effective installation method that can satisfy the energy saving and indoor comfort of the building by dividing ... + READ MORE
    This study aimed at an effective installation method that can satisfy the energy saving and indoor comfort of the building by dividing the building-integrated solar power generation into the external wall fixed solar power generation and the solar power generation installed at the window. As a result, when fixed solar power generation and photovoltaic power generation are installed on the windows, the larger the window area ratio of the outer wall of the building is, the more disadvantageous is energy saving and comfort satisfaction. In conclusion, the optimal experimental model is a model with a window area ratio of 0%. However, considering the architectural elements and the results of previous studies, the realistic optimal model is thought to be close to WWR 60%. In the future, it is judged that additional research is needed in consideration of architectural factors such as aesthetics and structure. - COLLAPSE
    February 2021
  • Research Article

    Field Measurement of Fine Particulate Matter Concentration in a University Computer Room

    실측을 통한 일개 대학 전산실의 미세먼지 농도특성 분석

    Cheong, Chang-Heon

    정창헌

    This study determined the concentrations and I/O ratios of fine particulate matter in a computer room located in a university by ... + READ MORE
    This study determined the concentrations and I/O ratios of fine particulate matter in a computer room located in a university by field measurements. The I/O ratios of fine particulate matters ranged from 0.3 ㎛ to 3.0 ㎛ in computer room, are higher than 1. In addition, concentrations of fine particulate matter at lower part (above 50 cm from floor level) of computer room are higher than upper part (above 100 cm and 150 cm from floor level). These results indicate than computer room needs control over fine particulate matter with smaller diameter (0.3 ㎛ to 3.0 ㎛). Removal of fine particulate matter at lower part of computer room also should be considered to reduce occupants’ health problems. - COLLAPSE
    February 2021
  • Research Article

    Suggestion of Input Data and Application Plan for Evaluating the Building Energy Efficiency Rating Unevaluated Space (Without Heating and Cooling)

    건축물 에너지효율등급 미평가 공간(냉‧난방 미설치 공간)의 평가를 위한 입력 데이터 및 적용 방안 제시

    Seo, Woo-Seok, Yoo, Dong-Chul, Jang, Hyang-In, Shin, Hyun-Jung, Park, Byoung-Yoon, Choi, Chang-Ho

    서우석, 유동철, 장향인, 신현정, 박병윤, 최창호

    The purpose of this study is to create data so that unevaluated spaces can be evaluated to resolve the uncertainty arising from ... + READ MORE
    The purpose of this study is to create data so that unevaluated spaces can be evaluated to resolve the uncertainty arising from the spaces excluded from evaluation due to the absence of a cooling/heating system, such as apartment housing or tenant space, when certifying the energy efficiency of a building. Therefore, the main cooling system was investigated for apartment housings and the main building usage and the main cooling and heating system were investigated for tenant spaces. Accordingly, data was created by checking the ECO2 input data, which is the main program used to evaluate the energy efficiency of a building. Its error rate was verified through comparison with the case of a building energy efficiency rating to verify the created data. As a result, the apartment housing data was calculated with an energy consumption of about 7%, and the tenant space data was calculated with an error rate of 10% and a confidence level of 90%. Regarding apartment housings, the air conditioning days are different for each region and it is judged that a deviation occurred because the energy consumption was calculated based on the data of the minimum consumption efficiency standard. In addition, regarding tenant spaces, it is judged that an error occurred because the load calculation criteria are different depending on the characteristics of a space within the neighborhood living facilities. Therefore, it is believed that the application of data created in this study will contribute to the improvement of building energy efficiency certification system. - COLLAPSE
    February 2021
  • Research Article

    A Study on Business Model Development for Renewable Energy Sharing Community: Based on Eco-Science Method

    신재생 에너지 공유 공동체 활성화를 위한 비즈니스 모델 개발 연구: Eco-science 방법론을 기반으로

    Cho, Mee-Ryoung, Kim, In-Tae, Kim, Yu-Sin, Baek, Bo-Hyun, Kim, Ju-Ho, Kwon, Hyeog-In

    조미령, 김인태, 김유신, 백보현, 김주호, 권혁인

    The purpose of this study is to develop a business model that uses renewable energy centered on solar power to generate electricity ... + READ MORE
    The purpose of this study is to develop a business model that uses renewable energy centered on solar power to generate electricity by using the roof of an apartment and utilize it in the form of distributed resources. Therefore, using Eco-science methodology optimized to develop a convergence industry model, service derivation through analysis of new and renewable energy environments, an innovation model of the existing ecosystem to implement the service, and a business model based on the innovation ecosystem were designed. As a result, an innovative business model that applied a virtual fee offset system using solar power generation facilities in the idle space on the roof of an apartment in the city was presented. - COLLAPSE
    February 2021
  • Research Article

    Investigation of Heating Energy Reduction Performance by Supplementary Insulation for Condensation Prevention in Apartment Buildings

    공동주택 결로 방지 보조 단열재의 난방 에너지 저감 성능 분석

    Shin, Mi-Su, Rhee, Kyu-Nam

    신미수, 이규남

    In apartment buildings, supplementary insulation is usually applied to the indoor side of wall-wall or wall-slab junctions to prevent condensation at thermal ... + READ MORE
    In apartment buildings, supplementary insulation is usually applied to the indoor side of wall-wall or wall-slab junctions to prevent condensation at thermal bridges. Although it is well known that the supplementary insulation is effective for the condensation prevention, few studies were conducted to investigate the impact of the supplementary insulation on the heating energy. In the present study, THERM and TRNSYS simulations were performed to analyze the impact of the width of supplementary insulation and the thickness of exterior wall insulation on heating energy as well as condensation prevention. Simulation results showed that the supplementary insulation of 300 mm-width is enough for the condensation prevention. It was found that the supplementary insulation can reduce the heating energy demand by 4.1%, 4.3%, and 5.5% for Central 1, Central 2, and Southern region, respectively. The width of supplementary insulation needs to be determined to achieve the sufficient energy saving while avoiding excessive addition of the supplementary insulation. - COLLAPSE
    February 2021
  • Research Article

    Correlation Analysis of Building Airtightness and Outdoor Particle Infiltration Index in Apartment Buildings

    공동주택의 건물 기밀도와 대기 중 먼지 침입지표의 상관관계 분석

    Eom, Ye-Seul, Park, Bo-Ram, Kang, Dong-Hwa

    엄예슬, 박보람, 강동화

    The objective of this study is to investigate the correlation of particle infiltration and building airtightness according to the deterioration of apartment ... + READ MORE
    The objective of this study is to investigate the correlation of particle infiltration and building airtightness according to the deterioration of apartment housing units. For this purpose, the blower door test and particle infiltration experiments were conducted in 6 apartment housing units. The blower door test was conducted to measure the airtightness and the leakage area of suspected particle penetration pathways. The infiltration test method was performed to estimate the size-resolved particle penetration coefficient (P), infiltration factors (Finf), and outdoor particle infiltration rate (P×λ). During the infiltration test, the indoor and outdoor pressure difference was maintained at 10Pa using the blower-door depressurization procedure. The blower door test results showed that the difference in the airtightness level of leaky and average airtight housing units was about 2.5 times. The particle infiltration test results showed that the penetration coefficient (P), infiltration factor (Finf), and outdoor particle infiltration rate (P×λ) tended to decrease as the particle diameter increases. This result means that small particle size can easily pass through the crack in the envelope of the building. According to the results of the relationship between infiltration and airtightness, it was analyzed that the indoor particle concentration of leaky housing units could be 4.34 times higher than average airtight housing units under the same outdoor particle concentration condition. The results suggest that the required amount of particle removal may differ depending on the airtightness of the building. - COLLAPSE
    February 2021
  • Research Article

    Comparison of Insulation Performance of Curtain Wall System with Conventional Rectangular Pipe Frame and Truss-shaped Insulation Frame

    기존 각파이프 프레임과 트러스 단열 프레임 적용 커튼월 시스템의 단열성능 비교평가

    Choi, Bo-Hye, Shin, Dong-Il, Song, Seung-Yeong

    최보혜, 신동일, 송승영

    The aim of this study is to compare the insulation performance of each curtain wall system applying the conventional rectangular pipe frame ... + READ MORE
    The aim of this study is to compare the insulation performance of each curtain wall system applying the conventional rectangular pipe frame and the truss-shaped insulation frame that reduces the thermal bridging effect of the conventional frame. The insulation performance of each system was evaluated by performing a three-dimensional steady state heat transfer simulation reflecting the actual installation conditions. The results show that the heat losses of the conventional and alternative systems are 33.06 W and 21.12 W, respectively, and the effective U-factors are 0.264 W/㎡K and 0.169 W/㎡K, respectively. The effective U-factor of the conventional system is significantly higher than the design U-factor, indicating that the heat loss due to the thermal bridge is large. The effective U-factor of the alternative system is reduced by 36% compared to the conventional system, which significantly reduces the heat loss. In addition, the lowest indoor surface temperature and temperature difference ratio of the alternative system increases by 0.5℃ and decreases by 0.02, respectively, compared to the conventional system, which reduces the risk of condensation. - COLLAPSE
    February 2021
  • Research Article

    A Method for Setting Pollutant Concentration References for a School Indoor Air Quality Index

    학교 실내공기질 지표 개발을 위한 오염물질 농도 기준치 설정 방안

    Kim, Hyun-Jun, Kim, Hye-Gi, Kim, Sun-Sook

    김현준, 김혜기, 김선숙

    Indoor air quality in schools may have an impact on students’ health and concentration, and activities for maintenance and improvement should be ... + READ MORE
    Indoor air quality in schools may have an impact on students’ health and concentration, and activities for maintenance and improvement should be carried out on the basis of an objective evaluation of the indoor air quality. The purpose of this study is to suggest a method for setting the absolute and relative reference values for an indoor air quality index in the classrooms of the school. The pollutant concentration criteria in domestic and foreign codes, guidelines, certification systems, and indoor environment indexes were investigated and analyzed, and the absolute references with three levels were established for five pollutants including PM10, PM2.5, CO2, formaldehyde, and total airborne bacteria. The distribution characteristics of each pollutant were analyzed using the public data from the Ministry of Education, and peer groups for appropriate comparison were suggested for setting relative references. - COLLAPSE
    February 2021
  • Research Article

    Characteristic Analysis for Electricity Energy Consumption with Segmented Linear Regression Model for Highly Energy Demand Commercial Buildings

    Segmented Linear Regression 모델 기반 상업용 에너지다소비건물의 전력 소비특성 분석

    Jeong, Yu-Chan, Jeong, Jin-Hwa, Lee, Seon-Han, Chae, Young-Tae

    정유찬, 정진화, 이선한, 채영태

    The electricity energy consumption of commercial building is affected by thermal performance, building operation, occupancy schedule, and several weather parameters. Especially, it ... + READ MORE
    The electricity energy consumption of commercial building is affected by thermal performance, building operation, occupancy schedule, and several weather parameters. Especially, it is difficult to characterize the end-used energy consumption of exist buildings with a single electricity meter for the whole building. Although many studies have been conducted to develop building energy baseline model to separate building base, heating, and cooling energy consumption from a total meter, the most model has been focused on monthly energy data with heating or cooling degree days and a specific building in general characteristics. This study presents an autonomous process with segmented linear regression model to analyze the characteristics of base, heating, and cooling energy consumption from total electricity meter for several highly energy demand commercial buildings by automatically searching best-fit energy baseline model. The result shows that electricity energy consumption patterns of highly energy demand buildings have one or two change point in correlation with the daily mean outdoor air temperature. In addition, the presented model can specify the baseline energy consumptions from the whole building electricity meter which generally aggregates all energy consumption of the buildings. - COLLAPSE
    February 2021
Journal Informaiton Journal of Korean Institute of Architectural Sustainable Environment and Building Systems Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
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