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BIM기반 친환경건축물 등급 인증기준의 에너지성능지표(E.P.I)의 개선방안에 관한 연구
이권형(Lee Kweon-Hyoung),김인한(Kim In-Han),추승연(Choo Seung-Yeon) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.9
Today, there is a growing recognition of environmental pollution worldwide and green buildings and energy saving buildings for green growth are collectively being developed, according to the recent architectural trend. For those reasons, many countries in the world are establishing laws for green growth and modifying design guidelines and green building certification systems, currently. Korean government also announced the national strategies for green growth and set ‘Green Building Certification Systems’ and ‘Energy Saving Design Standards of Buildings’ by establishing the Green Growth Committee directly responsible to the President, according to this global trend. In the domestic green building certification systems, energy performance of buildings are being verified and assessed based on the ‘Energy Performance Index Review’ of ‘the Energy Saving Design Standards of Buildings’, but the current verification method is being carried out based on overall heat transfer coefficient of thermal insulators, walls, roofs, slabs, windows and doors and thickness and scale. It is therefore inappropriate to verify energy saving plans from the beginning stage of building design. To get over them, we need to assess alternatives directly using BIM-based 3D Modeling and Simulation and remedy the current verification methods, according to changes in design elements and energy performance. This experiment was designed to model business Facilities using BIM-based Revit Architecture and analyze energy performance of buildings, depending on changes in geography, weather information, direction and facade plan which have been insufficiently verified so far, even though they are closely related to energy performance of buildings, after extracting information of buildings modeled by a building energy performance analysis program, Ecotect Analysis using gbXML extension. After investigating the possibility for simulation verification methods through BIM-based modeling, in this study, change aspects of the energy performance index were analyzed, according to changes in building design elements. Based on the analysis results, this study will suggest supplement points and appropriate verification methods for the future BIM-based green building certification.
Green BIM 기반 에너지성능분석을 통한 오피스 타워의 매스형태 결정인자 위계 분석 및 저탄소 설계전략 개발
이권형(Lee, Kweon-Hyoung),추승연(Choo, Seung-Yeon) 한국건축친환경설비학회 2016 한국건축친환경설비학회 논문집 Vol.10 No.4
To address the problem of global warming, efforts are being made worldwide to reduce carbon emissions. As part of these efforts, a plan for energy savings at the national level has been established. Large cities in each country are major energy consumers. In addition, architects of metropolitan high-rise towers, which are also major energy consumption sources, have committed to establishing institutional mechanisms to reduce the energy consumption of such buildings. However, designs that consider energy performance have been limited to the introduction of conceptual technology. Energy-saving plans considering energy performance are generally established through heating, ventilation, and air-conditioning (HVAC) systems only after the design of the tower is determined. By analyzing the mass form determinants, except those for HVAC, in designing a tower, this study analyzed the correlation between the mass form determinants and energy performance of the tower, allowing designers to consider energy performance from the early design stages. This study then attempted to analyze design strategies for efficient energy reduction, without relying on HVAC, in the phases prior to deciding on a design. In addition, this study attempted to transform the correlation into an equation using the typical floor plan, window area ratio, skin size, floor area, volume, floor height, story height, and aspect ratio, which determine the mass form in the early phase of design. By developing objective design indicators for energy performance based on this equation, this study could be used as basic material for rating the quality of energy performance-based designs, thereby contributing to the growth of low-carbon-footprint green construction.
시뮬레이션 기반 타워형 업무시설의 형태별 창면적비와 냉난방부하 간의 상관관계 분석에 관한 연구
이권형(Lee, Kweon-Hyoung),류정림(Ryu, Jung-Rim),추승연(Choo, Seung-Yeon) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.9
Recently, there is an interest about Green Buildings and Low-Carbon Design in architecture. The Korean government is expected to prepares a policy for reducing green house gases. Also, energy consumption in building increases continuously as a demand for comfort and convenience have increased recognition of change in building. For this reason, the field of architecture is searching for energy reduction program that uses energy saving building materials and new regeneration energy. But a study of design methods for energy saving is lacking. Therefore, this research defines factors that effect the energy performance in buildings, especially in the view of the window to wall ratio which greatly influences heating and cooling loads. The window to wall ratio highly influences energy saving at the early design stage. The research compares and analyzes the window to wall ratio on each type of building mass. It proposes a basis for deduction of resonable office tower’s window areas by using a result value from each type of building mass and floor area. The proposed results on window to wall ratio will help in energy reduction at design stages.
Green BIM 기반 건축설계 품질평가를 위한 에너지 성능분석 결과값 가시화 기법 개발
이권형(Lee, Kweon-Hyoung),추승연(Choo, Seung-Yeon) 대한건축학회 2017 대한건축학회논문집 Vol.33 No.1
With the increase in the interest in low-carbon design technique development, there are active studies on development of energy performance-based design techniques using BIM. However, there is yet an inadequacy of clear standard for design quality evaluation to perform energy performance analysis using BIM at each stage of design. For this reason, development of low-carbon design techniques, which rely on insulation performance and HVAC system, is dominant rather than energy performance evaluation that is based on design including the size and shape of building. This result comes from a shortage of linkage between expression of cooling and heating load-oriented energy performance analysis result per unit area and design techniques. In particular, quantitative development was dominant due to rapid industrial development and urbanization in the 1970s to 80s and performance evaluation per unit area was commonly used due to legal and institutional problems. Besides, there was a lack of awareness of energy performance evaluation for design quality evaluation, in addition to simple design forms. But in the 2000s, construction design qualitatively developed and there was a rapid rise in the interest in performance-based atypical and eco-friendly design. In this situation, performance analysis per unit area and facility performance quality evaluation have limits in expressing or solving this. On the other hand, energy performance analysis was part of construction facility for HVAC system installation in the past. But currently, it is an important area of construction and environmental engineering and a core technology to consider maintenance of building at the initial stage of design. Nevertheless, it is hard for architects to simulate and understand analysis results, since energy engineering, mechanical engineering and electrical engineering-based analysis methods are applied and in energy performance-based design, they still should put emphasis on plans that depend on facility performance, not design. Therefore, this study aims to develop a visualization technique for energy performance-based design quality evaluation, which is easy for designers to understand, by applying various design elements and design techniques. It is anticipated that breaking from insulation performance and HVAC system-dependant energy performance-based design techniques, this methodology for performance-based design would make a contribution to development of BIM-based low-carbon design techniques.
Energy BIM 기반 초기 건축 단계의 설계결정인자 간 상관성 분석
이권형(Lee, Kweon-Hyoung),김인한(Kim, In-Han),추승연(Choo, Seung-Yeon) 대한건축학회 2014 대한건축학회논문집 Vol.30 No.12
BIM records all the data of buildings from the early design stage and, therefore, has the advantage that it can actively cope with energy simulation feedback and design change with development of design stages. However, preparation of simulation based energy performance assessment system and development of BIM based low carbon design technique are still unsatisfactory. For greenhouse gas mitigation and energy saving in the architectural sector, applying of BIM based_low carbon design technique is required from the early design stage. However, as the research areas are limited to sub-segmented topics, it is difficult for designers to establish grade of rank of low carbon design technique required for application in design planning. This study attempts to analyze grade of rank and correlation among design techniques affecting building energy performance. As targets of experiments, the study selected tower buildings, which are favored recently as business facilities with huge scale, massive energy consumption and big impact on the surrounding environment. The study analyzed result values yielded from different shape, scale, slenderness ratio, window-to-wall ratio, and solar orientation of the tower buildings. Through the experiments, the study found that the component having the biggest impact on building energy performance is window-to-wall ratio(WWR) followed by slenderness ratio, envelope area and solar orientation. The influence of WWR is the biggest with 81.2% among the design components. Smaller WWR makes bigger change range of heating and cooling loads. Therefore even small change can have significant effect on energy performance. Also, In the same total floor area, slenderness ratio closer to 1:1 is more advantageous for HCL. Besides, even with the same ratio of lateral to longitudinal length, relatively long mass in the direction of East and West can increase energy performance up to 6.4%. Then, the study drew out correlation and grade of rank among different design techniques. Based on the data, energy saving can be achieved from the early stage of architectural planning. The architects also can maximize energy performance efficiency by considering and applying grade of rank of low carbon design technique in design planning. Besides, development of guidelines on Energy BIM would reduce confusion in the decision making process and design modification in development stages of design.