Proposal of Simplified LCA Technique for Potential Environmental Impact Assessment of The Construction Materials

최두성,전흥찬,정용호 한국생활환경학회 2013 한국생활환경학회지 Vol.20 No.6

In this study, the Simplified LCA technique is proposed as a way to quantitatively assess the potential environmental impact of the materials used in the construction of apartments is proposed. Then the analysis of cases is conducted to verify the reliability of the proposed simplified LCA technique using the data obtained from apartment constructions sites. With all data obtained from 27 apartment construction work sites, the full scale LCA for environmental impact assessment of all construction materials is conducted. The simplified LCA technique is also conducted by classifying the materials into the main materials which have big change in basic unit and other materials which do not. The error between the results of full scale LCA and simplified LCA was found to be 3.6% maximum. This result shows that the reliability of the proposed simplified LCA technique is good as a tool for conducting the environmental impact assessment over the life cycle of buildings.

국내 주거 단지에 대한 전과정 환경영향 분석

최두성,전흥찬,조균형,Choi, Doo-Sung,Jeon, Hung-Chan,Cho, Kyun-Hyong 한국건설관리학회 2014 한국건설관리학회 논문집 Vol.15 No.5

본 연구는 건축물 중 공동주택 단지를 대상으로, 건축물에 투입되는 자재생산부터 건축물이 해체되는 전과정동안 환경에 미치는 영향을 6개의 환경영향 범주로 구분하여 정량적으로 산출하였으며, 국내의 모든 산업이 환경에 미치는 영향을 대략적으로 분석하여 비교 평가하였다. 총 27 단지에 대한 환경영향을 분석한 결과 단지를 구성하는 건물 및 시설별로는 공동주택 건물이 단지 전체 대비 약 88.2%를 차지하는 것으로 분석되었으며, 이후 지하주차장, 공통부분, 복지시설, 판매시설, 기타시설 순으로 환경에 미치는 영향이 큰 것으로 분석되었다. 이중 가장 영향이 큰 공동주택 건물만을 대상으로 분석한 경우에는 전과정 중 사용단계에서 환경에 미치는 영향이 가장 크게 나타났으며 이후 자재생산단계, 시공단계, 해체 및 폐기단계 순으로 환경에 미치는 영향이 크게 분석되었다. 또한 공동주택 건물의 전과정에 대한 환경영향 분석 결과 국내 총 산업 대비 약 11. 96%를 차지하는 것으로 분석되었다. This study on condominium complex will adopt the quantitative assessment of the influence on the environment throughout the entire life cycle of buildings. This paper applies input-out analysis in order to analyse embodied energy regarding input of materials at material production phase. Also, it calculates environment load at use and demolition and destruction Phases of buildings as analysing energy consumption. The study categorises environment load as six impact categories and undertakes environmental impact evaluation. The consequence shows that the environment load of multi-unit dwelling takes up 88.2% out of the entire environment load of condominium complex. Also, as a result of analyzing the environmental impact of the life cycle of condominium buildings, it was found that such environmental impact comprised of about 11.96% of all industries in Korea that had an environmental impact.

건축물 열원설비에서의 LCA 적용에 관한 사례연구

최두성,문성환,조균형 한국생활환경학회 2008 한국생활환경학회지 Vol.15 No.4

The construction industry consumes lots of energy and its influence of environment is much worse than others. There were many studies before but not in building equipment field. However, the consumption of energy and the environmental load are important not only construction part but also building equipment field. We need to have the analysis which compared through the case building as well. We analyzed LCI (Life Cycle Inventory) and LCIA (Life Cycle Impact Assessment) with comparing ice thermal storage system and direct-fired absorption chiller-heater system in the stage of manufacture and use (except construction and disposal). This study shows you the ice thermal storage system's LCI emission is 10.5% lower than direct-fired absorption chiller-heater system's and the ice thermal storage system's LCIA is 15.7% lower than direct-fired absorption chiller-heater system. It means ice thermal storage system is more environment-friendly than direct-fired absorption chiller-heater system.

업무용 건축물 LCA 분석을 통한 녹색건축 인증제도 개선방안 연구

최두성,정용호,전흥찬 한국생활환경학회 2023 한국생활환경학회지 Vol.30 No.2

In this study, a study was conducted to identify problems with the 'building LCA' evaluation items in a domestic green building certification system(G-SEED), and to prepare improvement plans. To this end, domestic and foreign green building certification systems were compared, and the evaluation items of G-SEED were analyzed and LCA case studies were conducted for Business facilities buildings, and the results were analyzed. As a result of the case analysis, it was analyzed that each environmental load impact category affects the environment in the order of 48.5% global warming, 37.3% resource depletion, 5.8% photochemical oxide production, 4.7% human toxicity, 2.0% acidification, 1.1% eutrophication, 0.4% ecotoxicity, and 0.3% ozone layer destruction. In addition, improvement plans were presented through the results of case analysis.

분산형 모듈러 데이터센터를 위한 태양광 발전시스템 경제성평가

최두성,정용호 한국생활환경학회 2022 한국생활환경학회지 Vol.29 No.1

Among the measures to apply renewable energy to data centers, solar power generation is considered to be the most applicable and renewable energy currently available because of the physical conditions in which containertype distributed data centers are installed outdoors and data centers are operated 24 hours a day. Therefore, when the telephotovoltaic system was applied to distributed data centers based on domestic weather data, energy simulation was conducted, and the applicability of the system was evaluated through economic evaluation. As a result of the analysis, the average monthly predicted consumption was 8151 kWh, 9021 kWh, 9388 kWh, and 9712 kWh, respectively, in the four regions, and the overall average monthly energy consumption was calculated as 9068 kWh. The average power generation was 518 kWh, 616 kWh, 624 kWh, and 512 kWh, respectively, in four regions, and the average ratio of solar power generation supply based on annual electric energy consumption was 6.3%. When applying the solar power generation system to the distributed data center, average annual energy saving was calculated as KRW 1,429,890, and the initial investment recovery period was evaluated as an average of 6.45 years.

공동주택에서 PV모듈에 따른 태양광발전시스템의 경제성 평가

최두성,안준호,도진석 청운대학교 건설환경연구소 2015 청운대학교 건설환경연구소 논문집 Vol.10 No.2

This study analyzed the characteristics of the PV modules being applied to apartments and the photovoltaic power generation systems using them, and compared/evaluated the economic efficiency of the photovoltaic power generation systems depending on PV modules by dividing them into ones installed(crystalline) in the balcony of apartments and ones applied(amorphous) directly to windows and doors. As a result of economic evaluation for the systems installed simply in balconies(crystalline) that have high power generation efficiency but cause large heating on the back and have no transparency, it was analyzed that the initial investment cost can be recovered in 22 years(Case1-1) or 24 years(Case1-2), generating profits of 47,776,000KRW(Case1-1) or 12,001,000KRW(Case1-2) during the analysis period(25 years). On the other hand, for the systems(amorphous) that can be applied directly to windows and doors because of having transparency and causing less rear heating, it was analyzed that the life cycle cost(including savings) is 162,255,000KRW(Case2-1) or 131,226,000KRW(Case2-2) and it is difficult to recover the initial investment cost in the analysis period(25 years). In addition, it was analyzed that it is necessary to secure power generation efficiency of at least 15%(Case2-1) or 20%(Case2-2) to apply a system of window and door type(amorphous) that enables transparency and viewing to secure a residential performance. 본 연구는 공동주택에 적용되고 있는 PV모듈 및 이를 적용한 태양광발전시스템의 특성을 분석하였으며, PV모듈에 따른 태양광발전시스템을 공동주택 발코니부분에 거치(결정질)하거나 창호에 직접 적용(비결정질)하는 형태로 구분하여 시스템별 경제성을 비교‧평가하였다. 발전효율은 높지만 후면발열이 크고 투광성이 없어 발코니부분(결정질)에 단순 거치하는 시스템에 대한 경제성평가 결과 초기투자비용은 22년(Case1-1), 24년(Case1-2)에 회수가 가능하고 분석기간(25년) 동안 47,776천원(Case1-1), 12,001천원(Case1-2)의 이익이 발생하는 것으로 분석되었다. 반면, 투광성을 가지고 있으며 후면발열이 적어 창호에 직접 적용이 가능한 시스템(비결정질)의 경우 생애주기비용(절감비용 포함)은 162,255천원(Case2-1), 131,226천원(Case2-2) 분석되었으며 분석기간(25년)동안 초기투자비용 회수가 어려운 것으로 분석되었다. 또한, 채광‧조망이 가능하여 주거성능 확보가 가능한 창호형(비결정질)시스템 적용을 위해서는 최소 15%(Case2-1), 20%(Case2-2) 이상의 발전효율 확보가 필요한 것으로 분석되었다.

환경적 평가 기준에 따른 태양열 급탕시스템의 설계 최적화

최두성,고명진,박광태 청운대학교 건설환경연구소 2015 청운대학교 건설환경연구소 논문집 Vol.10 No.1

This paper presents an optimization design method to determine the optimal size and configuration for a solar water heating system using genetic algorithm while minimizing greenhouse gas emissions and satisfying the constraints such as energy balance, available space to install collector and the solar fraction. As a case study, we designed a solar water heating system in an office building in Incheon, South Korea. The evolution of possible solutions through generation and the characteristics of optimal solution is discussed. The result shows that greenhouse gas of 6% and 57% can be reduced using the proposed method compared to that for the best and worst solutions in the initial population. 본 연구는 최적해 탐색 알고리즘인 유전 알고리즘을 이용하여 온실가스 배출량 최소화라는 환경적 평가 기준에 따라 태양열 급탕시스템의 최적 용량과 구성을 결정하는 최적화 설계 방법을 나타낸다. 아울러 제안한 설계 방법의 적용 타당성을 확보하기 위해 태양열 급탕시스템의 에너지 균형, 설치가능 면적, 태양열 의존율을 제약조건으로 반영하였다. 사례연구로서 인천지역 사무소 건물의 태양열 급탕시스템에 대한 최적화 설계를 수행하고, 도출된 최적 설계안의 특성에 대한 분석을 실시하였다. 사례연구 분석 결과, 최적 설계안은 초기 군집의 가장 우수하고 열악한 설계안들과 비교하여 각각 약 6%와 57%의 온실가스 배출량을 절감할 수 있는 것으로 나타났다.

Establishment of Gas Energy Consumption basic unit by Building Using Cluster Analysis

최두성,전흥찬,도진석 한국생태환경건축학회 2017 한국생태환경건축학회 논문집 Vol.17 No.6

Purpose: The current study uses energy information made public as a part of building energy information access policy in order to analyze the pattern of end-use gas energy consumption in buildings and establish the basic unit of gas energy consumption by building use. Method: Monthly gas energy consumption data from buildings in various addresses, provided by the Korean government, was used in the current study. The data was categorized based on the similarity to each other, using cluster analysis method that can categorize large volumes of data with relative ease and speed. In cluster analysis, hierarchical clustering technique based on dynamic time warping was used, as it enables time series data analysis. Result: A cluster analysis of gas energy consumption in 291 buildings in greater Seoul area with 10 different detailed end-use purposes yielded 25 clusters: 76 buildings were in Cluster-1, 142 in Cluster-2, and 36 in Cluster-3, forming the bulk of the sample. Establishing the EUI of gas energy consumption by building use, the results showed that commercial-residential buildings had the highest consumption at 10.096kWh/㎡, followed by preschools, apartments, offices, religious facilities, stores, elementary schools, middle schools, and high schools using most energy, in that order.

환기시스템에서의 배기 오염물질 재유입률 산출에 관한 연구

최두성,박덕연,조균형 한국생활환경학회 2008 한국생활환경학회지 Vol.15 No.4

This study evaluates the ventilation efficiency of ventilation system through the analysis of contaminant recirculation ratio of ventilation system in the apartment house. It analyzed air flow CO2 concentration by wind direction and ventilation system operation rate with CFD program. The results of analysis, if the wind blows at the facade which has OA and EA, there was no contaminant recirculation ratio so this is the most efficient case. However, if the wind blows at the side facade, it occurs the warm current at opposite facade and recirculation ratio was raised up so this case has a lower efficiency.

공동주택의 편복도 외벽체에 대한 화재안전성 비교분석

최두성(Choi Doo-Sung),전흥찬(Chun Hung-Chan),조균형(Cho Kyun-Hyong) 한국건축친환경설비학회 2010 한국건축친환경설비학회 논문집 Vol.4 No.2

In this research, the wall construction method influences the partially exposed situation in the one sided corridor type that is a form of the representing tenement house within the nation. A computer simulation was performed, with the purpose to analyse, suggest problems and development plans of safety in cases of fire. As a result of the analysis, all analyzing cases which the fire scenarios were applied in the middle and end complexes, showed that minimum evacuation time were within 195 seconds and 348 seconds, and if a part of the on sided corridor was opened with fire the safety of the residents were improved and the residential environment too were suggested possible for development.