• Research Article

    A Study on the Prediction of Achieving of Zero Energy Building Certification in an Apartment House according to Early Adoption of Zero-energy Buildings

    제로에너지건축 조기도입에 따른 공동주택의 제로에너지건축물 인증 확보 예측에 관한 연구

    Munkhbat, Undram, Byun, Soo-Young, Lee, Do-Hyung

    옹드람, 변수영, 이도형

    In this study, the possibility of achieving a zero-energy building certification was analyzed when installing a PV module on the roof of ... + READ MORE
    In this study, the possibility of achieving a zero-energy building certification was analyzed when installing a PV module on the roof of an apartment complex at the current energy performance level in order to prepare a countermeasure to achieve a zero-energy building through minimal additional planning. The energy performance of the current new apartment complexes was found to correspond to the 1~1+ grade. Based on the current status analysis results, standard models were developed, and the error rate was found to be within 5%. In order to achieve the ZEB5 class, it is found that 0.011~0.014 kWp/㎡ for a district heating apartment and 0.021~0.023 kWp/㎡ for an individual heating apartment is necessary. When examined compared to the rooftop area, in the case of a district heating apartment, it could sufficiently achieve the ZEB5 class by installing a PV module on the roof. However, in the case of an individual heating apartment, more than 68% of the rooftop area needs to be installed, and it is necessary to preferentially lower the primary energy consumption through strengthening the building performance. - COLLAPSE
    August 2021
  • Research Article

    Sensitivity Analysis and Bayesian MCMC based on Artificial Neural Network Surrogate Model for Input Variable Uncertainty Calibration

    입력변수의 불확실성 보정을 위한 인공신경망 대리모델 기반의 민감도 분석 및 베이지안 MCMC

    Park, Seong-Cheol, Ha, Ju-Wan, Park, Kyung-Soon, Song, Young-Hak

    박성철, 하주완, 박경순, 송영학

    To have a precise simulation of building and quantitative performance evaluation, it is necessary to have high accuracy of input variables to ... + READ MORE
    To have a precise simulation of building and quantitative performance evaluation, it is necessary to have high accuracy of input variables to implement a simulation. Inherent uncertainties (unknown fault or rapid error generation, etc.) in input variables can have a significant impact on energy performance evaluation. To solve this, this study conducted Artificial Neural Network (ANN) surrogate model-based Sobol sensitivity analysis using data of water-cooled variable refrigerant flow air conditioning system and Bayesian Markov chain Monte Carlo (MCMC) using no-U-turn sampler (NUTS) algorithm was performed. The main results showed that the Coefficient of the Variation of the Root Mean Square Error of the ANN surrogate model was 23.4%, and the top 6 variables that affected the energy usage through the sensitivity analysis results were selected. Then, the prior and posterior probability distributions were plotted through Bayesian MCMC. The convergence verification result of MCMC verified that the mean R-hat value was 1.0, which ensured the accuracy of MCMC. For future study, a virtual sensor will be developed to detect and diagnose faults in building heating, ventilation, and air conditioning based on the study results. - COLLAPSE
    August 2021
  • Research Article

    Measurement of Particle Emission Rates according to Student’s Activity in Elementary School Classrooms

    초등학교 학생들의 활동에 따른 미세먼지 발생률 측정

    Shin, Hee-Won, Na, Hyeon-Young, Son, Ju-An, Eom, Ye-Seul, Kang, Dong-Hwa

    신희원, 나현영, 손주안, 엄예슬, 강동화

    The objective of this study was to analyze the particle emission rates according to elementary school student’s activities in classrooms. Both ... + READ MORE
    The objective of this study was to analyze the particle emission rates according to elementary school student’s activities in classrooms. Both laboratory and field experiments were conducted to measure particle emission rates with different students’ activities. The laboratory experiment was conducted to analyze particle emission rates by student’s height, weight, numbers, and activity types, while the field experiment was carried out to observe the combined impact of various activities on classroom air quality. The results showed that there were no significant differences in particle emission rates by student’s height and weight. However, notable increases in emission rates were observed when the number of students increases and an active and combined movement occurred. From the results of the field experiment, high particle emission rates were observed when the students enter the classroom frequently (dp< 0.3 ㎛) and during an activity class (dp> 0.3 ㎛). - COLLAPSE
    August 2021
  • Research Article

    The Performance Analysis of Curtain Wall-type Liquid-type Photovoltaic Thermal System Based on Module Arrangement

    커튼월형 액체식 태양광·열 시스템(CW. L-PVTs)의 모듈 배열에 따른 성능 분석

    Kim, Yun-Ho, Hwang, Jung-Ha

    김윤호, 황정하

    Recently, research and prototype development activities have been increasing to develop liquid-type photovoltaic thermal systems (L-PVTs) by combining the photovoltaic and solar ... + READ MORE
    Recently, research and prototype development activities have been increasing to develop liquid-type photovoltaic thermal systems (L-PVTs) by combining the photovoltaic and solar thermal systems among the renewable energy systems using solar energy. In a previous study, curtain wall-type L-PVTs (CW.L-PVTs) have been proposed, which are suitable for installation using the CW method on the outer walls of buildings where the installation area is limited. The present study used the following methods to comparatively analyze the energy production between different module arrangement methods of the CW.L-PVTs to determine the arrangement method that facilitates excellent energy production efficiency. First, we analyzed the structure of CW.L-PVTs proposed to facilitate easy application to the CW method. Second, the module arrangements and the variables of the coolant channel based on them were set, and the environmental variables for the TRNSYS18 energy analysis were set. Third, we conducted the energy analysis to comparatively analyze the electric and thermal energy production of each module based on the arrangement method and the module’s surface temperature based on the outdoor temperature and solar irradiation. As a result, an arrangement method showing the highest energy production efficiency was derived. - COLLAPSE
    August 2021
  • Review Article

    An Experimental Study on the Heat Resistance Performance and Building Applicability of Cavity Space in Contact with Low-emissivity Surface

    저방사 박막에 접한 공기층 열저항 성능 및 건축물 적용성에 관한 실험적 연구

    Seo, Jun-Sik, Hong, Seung-Hun, Sung, Uk-Joo, Shin, Jae-Yoon, Kho, Gwi-Han, Kim, Dae-Su

    서준식, 홍승훈, 성욱주, 신재윤, 고귀한, 김대수

    The insulation that compounds with low-emissivity films are applied to building roofs and walls as a radiant barrier and reflective insulation. The ... + READ MORE
    The insulation that compounds with low-emissivity films are applied to building roofs and walls as a radiant barrier and reflective insulation. The insulation that consist with low-emissivity films could achieve heat-resistant and economic advantage so that applicability is increasing globally. In this work, the applicability of the radiant barrier and reflective insulation has been analyzed by measuring thermal resistance of air layer in various cases. - COLLAPSE
    August 2021
  • Research Article

    A Study on the Selection of the Optimal Region of Data Center Considering Zero Energy Building Certification

    제로에너지건축물 인증을 고려한 데이터센터의 최적 지역 선정 연구

    Lee, Do-Hyung, Byun, Soo-Young

    이도형, 변수영

    Using the building energy efficiency rating evaluation program, this study analyzed the optimal region in terms of energy independence rate of data ... + READ MORE
    Using the building energy efficiency rating evaluation program, this study analyzed the optimal region in terms of energy independence rate of data centers in 66 regions in Korea. Pyeongchang has the most advantageous energy consumption and Changwon has the most disadvantageous analysis, which is believed to have a greater impact on ambient air temperature than solar radiation. A 19.53% difference occurred as Pyeongchang was the most advantageous with an energy independence rate of 67.76%, and Jeju was the most unfavorable with an energy independence rate of 48.23%. In addition, Pyeongchang is the only one among all regions to be able to acquire building energy efficiency rate for grades 1+++. The smaller the primary energy consumption per unit area, the more advantageous it is to energy independence rate, so it is believed that the data center should consider selecting optimal areas, optimal heat sources, and equipment placement considering ambient temperature. - COLLAPSE
    August 2021
  • Research Article

    Analysis of CO2 Levels depending on the Infiltration and Mechanical Ventilation Rates of Bedrooms in an Apartment House

    주택 침실의 침기 및 기계 환기에 따른 CO2 농도 변화 분석

    Cho, Kyung-Joo, Cho, Dong-Woo

    조경주, 조동우

    The minimum performance standard of ventilation systems defined in the Rules on Equipment Standards for Buildings, etc. is 0.5 air change ... + READ MORE
    The minimum performance standard of ventilation systems defined in the Rules on Equipment Standards for Buildings, etc. is 0.5 air change per hour. Since this standard is for all households, it can be seen that the doors of all rooms are open, when the doors of the rooms are closed, the appropriate ventilation amount could vary. In addition, the appropriate ventilation amount can be calculated from the number of occupants and the external CO2 levels, and the external CO2 levels has been increasing since the measurement in 1984. The ventilation systems applied to apartment houses generally provide the same amount of air to all households. This inevitably causes differences in air quality for each space depending on the difference in the infiltration rate or the number of occupants for each room. Therefore, two rooms with different infiltration rates were selected from the apartment house, and the CO2 removal rates according to the number of occupants and various ventilation rates were experimentally analyzed, and basic research was conducted to effectively operate the ventilation system for the apartment house. - COLLAPSE
    August 2021
  • Research Article

    Priority Analysis of Airborne Infection Prevention Measures Using Wells-Riley Equation

    Wells-Riley 식을 활용한 초등학교 내 공기전파감염관리 항목의 적용 우선순위 분석

    Cheong, Chang-Heon, Hwang, Seok-Ho

    정창헌, 황석호

    This study evaluated the impact of airborne infection prevention measures by Wells-Riley equation to provide basic information for infection control in elementary ... + READ MORE
    This study evaluated the impact of airborne infection prevention measures by Wells-Riley equation to provide basic information for infection control in elementary schools. At first, the Wells-Riley equation is modified to reflect prevention measures against airborne infection such as facial masks, ventilation and air purifiers. Afterward, 22 scenarios are established to evaluate the impact of airborne infection prevention measures. The results indicate infector screening by fever check is the most influential followed by hi-efficiency mask (KF94), ventilation, cotton-mask, air-purifier. Especially, when an infector is present, airborne infection risk can be reduced effectively only when both of wearing masks and ventilating are well done. Cotton-masks are useful but have limited effect, and air-purifiers can be used as auxiliary measures. - COLLAPSE
    August 2021
  • Research Article

    Evaluation on Weather Resistance of Dry and Wet External Thermal Insulation Walls according to EOTA Test Standard

    외단열 시험 표준에 따른 건식 및 습식 외단열 구조 벽체의 내후성 평가

    Kim, Jin-Hee, Kim, Sang-Myung, Kim, Jun-Tae

    김진희, 김상명, 김준태

    Exterior insulation and finishing system (EIFS) is a construction method that covers the entire exterior of a building such as the exterior ... + READ MORE
    Exterior insulation and finishing system (EIFS) is a construction method that covers the entire exterior of a building such as the exterior walls and roofs with thermal insulation. In addition to efficiently blocking heat bridges in buildings, EIFS is an energy-efficient construction method due to low heat loss, excellent air tightness, and insulation. In Europe, systems similar to EIFS are known as  External Wall Insulation System  (EWIS) and External Thermal Insulation Composite System (ETICS). EIFS can be divided into dry and wet according to the construction method used. To reduce the energy consumption of buildings, regulations for thermal transmittance has continuously been strengthened. To satisfy such building regulations, EIFS that have high thermal performance are widely used in Korea. However, a Korean standard for EIFS performance considering weather resistance does not exist. A thorough literature review shows lack of study on EIFS performance considering weather resistance, and examined according to a standard. In this study, both wet and dry EIFS walls were manufactured, and the weather resistance of EIFS walls were tested. Based on standard of European Organization for Technical Assessment (EOTA) - ETAG 004 Guideline for European Technical Approval of ETICS with Rendering, the test procedures for the EIFS walls were conducted to the heat-cold and heat-rain cycles. Afterwards, visual inspection, impact strength, and bond strength were evaluated. - COLLAPSE
    August 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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