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공동주택 단위 세대의 기밀 품질 시공에 따른 기밀성능 비교
지경환(Ji, Kyung-Hwan),이동석(Lee, Dong-Seok),조재훈(Jo, Jae-Hun) 한국건축친환경설비학회 2021 한국건축친환경설비학회 논문집 Vol.15 No.3
Recently, interest in passive building techniques has been increased to improve the energy efficiency of buildings. Accordingly, airtightness has become increasingly emphasized to reduce energy costs of heating and cooling attributable to infiltration and exfiltration. In this study, we compared airtightness value for apartment and mixed-use residential buildings, and evaluated the airtightness according to the airtightness quality construction. We conducted airtightness measurement using fan pressurization method for 37 units in 3 residentail buildings. As a result, the airtightness of the apartment unit was measured airtight. The airtightness was poorly measured for units with a drywall. And the airtightness was measure at a level of about one-third of the building with airtight quality construction.
지경환(Ji, Kyung-Hwan),신현국(Shin, Hyun-Kook),조재훈(Jo, Jae-Hun) 한국건축친환경설비학회 2016 한국건축친환경설비학회 논문집 Vol.10 No.1
The building airtightness level can be only known by the measurement. The preparations for measuring building airtightness are implemented before or after completion of construction. The preparation section(5.2) in ISO 9972 describes the preparation details before measurement with three types of methods(Method A, Method B, Method C) according to the purpose of measuring a test building. Method A and Method C are the ways of measuring airtightness of a building in use after completion. They are distinguished by the conditions of exhaust fans connected to outside(sealed or damper closed). According to the Method B, all openings connected to outside in a test building are required to be sealed to measure airtightness of the building envelope before completion. In this study, airtightness was measured with 10 units which have 2 unit-plan types in apartment building. The building airtightness were compared according to Method A, B, C. The result of airtightness measurement shows high-performanced airtightness in order as Method C, A, B. The interior furnishings and the conditions of exhaust fans affect the building airtightness levels.
다중회귀분석을 통한 국내 공동주택 단위세대의 기밀성능 예측
지경환(Ji, Kyung-Hwan),신현국(Shin, Hyun-Kook),한승우(Han, Seung-Woo),조현(Cho, Hyun),조재훈(Jo, Jae-Hun) 한국건축친환경설비학회 2017 한국건축친환경설비학회 논문집 Vol.11 No.6
Data on the airtightness of the envelope, which corresponds to the boundary of the overall building, is inputted beforehand into simulations for evaluating energy performance during the design stages of the building. Thus, it can be said that the determining of airtightness values is of the utmost importance especially in view of their key role in evaluating environmental and energy performance. This study proposes the most effective model among feasible models for predicting the airtightness of residential units based on a statistical analysis of empirical models directed at reinforced concrete apartment buildings constructed mainly in Korea. The variables for the statistical analysis include area variables and connection length variables, which represent the geometrical components of the envelope, where air infiltration and leakage actually occur. The correlation between the airtightness of the overall building and the variables is first analyzed to check the variables’ impact. A multiple linear regression analysis is performed for major variables selected by the impact analysis, whereby an airtightness prediction model is derived that is suitable for residential units of apartment buildings constructed with reinforced concrete.
지경환(Kyung-Hwan Ji),최병정(Byong-Jeong Choi) 한국산학기술학회 2019 한국산학기술학회논문지 Vol.20 No.4
설계안전성검토 제도 도입으로 현장공사수행 시 안전을 고려한 설계를 도입해야하나 실제 현장에서 설계안전성검토를 적용하여 수행하기에는 아직 미흡한 점이 많다. 본 연구에서는 설계안전성검토를 적용하지 않은 현장과 적용을 한 현장을 비교연구하였다. 적용공종은 건축물공사의 뼈대에 해당되는 골조공사 중 지하외벽공사에 대하여 연구하였다. 지하외벽 공사는 대부분 작업 조건이 외부 환경에 노출되어 작업조건이 열악하고 작업단계도 비계공사, 거푸집공사, 철근공사, 콘크리트타설공사 등을 거쳐야 완성되므로 안전사고 위험요소가 매우 높은 공종이다. 이에 각단계별 위험요소를 도출하고 위험성 평가를 실시하여 이를 저감하기 위한 대안공법을 선정하였다. 대안으로 선정된 공법의 위험요소를 도출하고 위험성평가를 실시하여 설계안전성검토 미적용현장과 적용현장을 비교하여 위험성평가 가중치를 산출하고 저감효과를 연구하여 설계안전성검토가 필요한 사유를 설명하였다. 또한, 대안으로 수립된 공법을 실제 적용한 사례를 연구하여설계안전성검토 필요성을 제시하였다. Safety-conscious design on site is required for site constructions because of the introduction of the design for safety, but it still leaves much to be desired. This study compared the site where the design was applied and the site where it was not applied. The applied case examined the underground wall construction during frame construction, which corresponds to the skeleton of the building construction. The underground wall construction is quite risky due to the exposure to exterior environments and involvement of various stages, such as scaffolding, formwork, reinforcing work, and concrete casting work. Therefore, the risk factors for each stage were identified and a risk assessment was carried out to select an alternative method to reduce the risk. The risk factors of the selected alternative construction method were also identified and a risk assessment was conducted. The risk assessment weight was calculated by comparing the site where the construction method was applied and the site where it was not, explaining the necessity of the design for safety in reducing the risk. In addition, an actual case where an alternative construction method was used was studied to highlight the necessity for a design for safety.
건물 출입문의 기밀성능 기준 및 측정을 통한 데이터 비교
지경환(Ji, Kyung-Hwan),이동석(Lee, Dong-Seok),조재훈(Jo, Jae-Hun) 대한건축학회 2014 대한건축학회논문집 Vol.30 No.3
Airtightness is a key factor for saving building energy. The importance of the entrance door airtightness has been increased because the importance of the whole building airtightness has been increased. In this study, we investigated domestic standard and international ones of entrance door airtightness to establish criteria of entrance door airtightness. We reviewed various measured airtightness data in the previous studies. Also, we conducted field measurements for several entrance doors ? types were such as the swing, sliding, and revolving doors installed existing buildings. Fan pressurization method was used for the measurement based on ASTM E783/ASTM 2283 standard. We made an comparative analysis on the field measured data with the measured ones of other countries.
국내 고층 공동주택의 기밀성능 특성 분석 및 누기부위 조사
지경환(Ji, Kyung-Hwan),신현국(Shin, Hyun-Kook),조재훈(Jo, Jae-Hun) 한국건축친환경설비학회 2016 한국건축친환경설비학회 논문집 Vol.10 No.4
In this paper, airtightness is measured using fan pressurization method in order to analyze the airtightness characteristics of residential buildings. Airtightness for 857 units of 5 complexes is measured. From the result, average ACH50 is 2.47 (1/h) and air permeability is 2.40 (m³/h·m²). ACH50 and air permeability have similar values, and it relates to S/V ratio. In addition, ACH50 tends to be low the larger floor area. The average n-value is 0.61, which indicates the characteristics of cracks where leakage happens. The key leakage points are entrance doors and windows frame connection, pipe penetration, and AD/PD dry wall.
건물의 기밀성능 측정에서 측정자에 따른 불확실성 실험연구
최지성(Choi Ji-Sung),지경환(Ji Kyung-Hwan),이동석(Lee Dong-Seok),조재훈(Jo Jae-Hun) 한국건축친환경설비학회 2014 한국건축친환경설비학회 논문집 Vol.8 No.2
This is the experimental study on airtightness measurements of 40 testers in order to identify the uncertainty of data by testers in the airtightness measurement of buildings. It is not easy to identify exact airtightness because airtightness contains a lot of uncertainty etc. by measurement methods, measurement conditions, testers. Therefore, we compared testers’ airtightness measurement results by carrying out education of the same contents during the same period and using the same environmental conditions and equipment. We reviewed uncertainty about the result of airtightness by comparing and analyzing airtightness data of the same building measured by testers. According to analysis results, uncertainty by testers was found to be lower than other uncertainty factors. Through uncertainty analysis research, when measuring airtightness, the main error cause and degree of uncertainty by testers can be easily identified and can be usefully utilized in improving measured experimental values.