• Proceedings of the KSME Conference
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• 2008.11a
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• pp.453-458
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• 2008

Under driving condition, A vehicle experiences various kinds of loads, which brings on the buckling and fracture of suspension systems. Lower control arm (LCA), which consists of 2 bush joints and 1 ball joint connection, is the one of the most important parts in the suspension system. The bush joints absorb the impact load and reduce the vibration from the road. When analyzing the LCA behavior, it is important to understand the material properties and boundary conditions of bushing systems correctly, because of the nonlinearity characteristics of the rubber. In this paper, in order to predict the large scale deformation of the LCA more precisely, three factors are newly suggested, that is, coupling of bush stiffness between translation and rotation, bush extraction force and maximum rotation angle of ball joint. LCA stiffness is estimated by CAE and component test. Analysis and test results are almost same and the validity of considering three factors in LCA analysis is verified.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.519-522
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• 2006

This study aims to provide useful information when making a decision for the environmental assessment of infrastructure, based on Life Cycle Assessment(LCA). It estimates environmental load on environmental pollutants that are possible to occur by locations and by types of emergency spillway for Korean multipurpose dam, which is selected as a study case. For this purpose, this study examines the theories of LCA and calculates environmental load on environmental pollutants that generate during life cycle, to apply the suggested infrastructure to the case study of emergency spillway at the multipurpose dam. It also evaluates environmental load of emergency spillway by the estimated result, and draws the optimum alternative that is environmental friendly.

• Journal of Environmental Impact Assessment
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• v.9 no.3
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• pp.185-202
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• 2000

Uncertainty and variability in Life Cycle Assessment(LCA) have been significant key issues in LCA methodology with techniques in other research area such as social and political science. Variability is understood as stemming from inherent variations in the real world, while uncertainty comes from inaccurate measurements, lack of data, model assumptions, etc. Related articles in this issues were reviewed for classification, distinguish and elaboration of probabilistic/stochastic health risk analysis application in LCA. Concept of focal zone, streamlining technique, scenario modelling and Monte Carlo/Latin Hypercube risk analysis were applied to the uncertainty/variability analysis of health risk in LCA. These results show that this general framework of multi-disciplinary methodology between probabilistic health risk assessment and LCA was of benefit to decision making process by suppling information about input/output data sensitivity, health effect priority and health risk distribution. There should be further research needs for case study using this methodology.

• Proceedings of the Korea Water Resources Association Conference
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• 2010.05a
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• pp.1656-1660
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• 2010

저수지와 양수장은 우리나라에서 용수공급면적기준으로 전체 공급량의 78%를 차지하는 중요한 용수 공급시설이다. 본 연구의 목적은 저수지와 양수장의 환경영향을 LCA기법을 이용해 비교 분석함으로써 두 시설들의 환경영향을 정량적으로 평가하는데 있다. 연구대상 수리시설로서 경기도 안성에 위치한 이동저수지와 은산양수장을 선정하여 각각에 대하여 농업수리시설의 전과정평가를 실시하였다. 평가를 위하여 네덜란드 Pre사가 개발한 소프트웨어 Simapro 7.1를 이용하였다. 두 시설에 대한 원료물질 취득 단계부터 건설, 운영, 유지관리 및 폐기단계까지 전과정의 환경영향을 분석한 결과, 두 종류의 시설 설치에 따른 토지이용, 상 하류의 생태적 영향 등이 고려되지 않았지만 저수지에 의한 농업용수 공급이 양수장에 의한 용수 공급보다 환경친화적이라고 볼 수 있다. 저수지의 경우 건설단계의 환경영향이 크고, 양수장의 경우, 운영단계에 환경영향이 큰 것으로 분석되었다. 단계별로 환경영향은 저수지는 건설단계에 건설재료 예를 들어 레미콘, 시멘트 등이 환경부하를 크게 발생시키기 때문이고, 양수장은 이용 단계에서 용수공급을 위한 전력사용에서 기인하는데, 이는 전력생산시 화석연료와 같은 자원소비가 많기 때문이다. 이번 연구는 토목시설물중 농업 용수 공급시설의 전과정에서 환경영향을 종합적으로 평가하는데 LCA가 활용되었다는 점에서 의의가 있으며, 향후 하드웨어적인 시설뿐만 아니라 농업용수 공급에 따른 전과정평가를 수행하고, 농업용수 LCI D/B 구축에 기초자료를 제공할 수 있을 것으로 예상된다.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.37-44
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• 2008

철도시설물의 유지관리를 위한 전통적인 의사결정 방법은 구조물의 기술적인 측면 즉, 시설물의 안전성과 사용성 등을 만족시키는 조건하에 경제적인 측면 즉, 시설물의 생애주기 비용을 최소화하고자 하는 것이며, 생애주기 비용을 정량화하기 위한 도구로서 LCC 기법이 사용되었다. 그러나, 1990년대 후반 이후로 지구온난화 등의 피해가 부각됨에 따라 선진국들을 중심으로 시설물의 유지관리를 위한 의사결정에 환경적 측면과 사회적 측면을 추가적으로 고려하는 지속가능한 발전 개념을 도입하고 있으며, 환경 부하를 정량화하기 위한 도구로서 LCA를 적용하고 있다. 본 연구에서는 시설물의 유지관리 행위와 관련된 경제적 측면과 환경적 측면을 정량화하는 방법으로서 LCC 및 LCA의 적용 방안을 고찰하고, LCC 및 LCA 결과로부터 시설물 유지관리 최적 방안을 결정하기 위한 의사결정 기법을 제안한다. 국내의 철도시설물에 대한 유지관리 필요성이 증대되고 있으며, 철도시설물의 규모가 커서 유지관리 행위에 따른 경제적 및 환경적 파급효과가 큼을 감안할 때, 본 연구에서 제안된 내용은 경제적이고 환경 친화적인 철도시설물 유지관리 방안을 선정하는데 유용한 방법론으로 활용될 것으로 사료된다.

• International Journal of High-Rise Buildings
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• v.12 no.2
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• pp.163-168
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• 2023

Today 55 percent of the population in the world lives in urban areas which is expected to increase to 68 percent by the year 2050. In the cities, high-rise buildings as symbols of the modern cityscape are dominating the skylines, but the data to demonstrate their embodied energy and environmental impacts are scarce, compared to low- or mid-rise buildings. Reducing the embodied energy and environmental impacts of buildings is critical as about 42 percent of primary energy use and 39 percent of the global greenhouse gas (GHG) emissions come from the building sector. However, it is an overlooked area in embodied energy and environmental impacts of high-rise buildings. Life cycle assessment (LCA) is a widely used tool to quantify the embodied energy and environmental impacts of the building sector. LCA combined with Building Information Modeling (BIM) can simplify data acquisition of the building as well as provide both tools with feedback. Several studies recognize that the integration of BIM and LCA can simplify data acquisition of the building as well as provide tools with feedback. This article provides an overview of literature on BIM-based of embodied energy and environmental impacts of high-rise buildings. It also compares with different LCA methodologies. Finally, major strategies to reduce embodied energy and environmental impacts of high-rise buildings, research limitations and trends in the field are covered.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.6D
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• pp.615-622
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• 2010

Recent years, the construction projects of a world-wide have changed toward integrated evaluation considering all environmental and economic aspect for ecological construction.. The object of this study is to suggest the method and system for integrated analysis VE/LCC and LCA. In order to integrate and analyze environmental and economic aspects of alternative design elements, decision maker should handle simultaneously much information such as cost, document and drawing. This study presents applicative methods of WBS for integrated management of these information. Also, this study presents a decision support system that can manage DB easily by using VE, LCC and LCA analysis module separately.

• Journal of Energy Engineering
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• v.8 no.2
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• pp.317-324
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• 1999

This study suggests the effectiveness of an "extended" power system evaluation methodology based on LCA and energy input-output analysis techniques. This "extended" evaluation methodology is designed to incorporate total energy system costs through fuel cycle and external costs, including CO$_2$abatement cost. As an empirical test, we applied the methodology to orimulsion-fired power generation technology and found that orimulsion could be considered as in attractive base-load power generation fuel in terms of economic and environmental aspects, compared to conventional coal-fired power plant.

• Proceedings of the Safety Management and Science Conference
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• 2005.11a
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• pp.276-280
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• 2005

Industrial processes and operations can not be accomplished independently but are connected with each others through suppliers and customer, and these ideas are fundamental notions of Life Cycle Assessment(LCA). This paper will introduce Life Cycle Assessment(LCA) in environment which is rising, and would like to build environmental management system using approach of Quality Function Deployment(QFD) and Safety Function Deployment(SFD) belonging to the assessment method.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2002.11a
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• pp.247-254
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• 2002

과학기술이 더 가까워질 미래사회로 갈수록 전력은 신규수요와 대체수요의 증가로 지금보다 많은 량의 공급을 요구할 것이다. 이 때문에 환경문제에 있어 전력산업의 영향이 커지고, 이로 인해 전력의 청정공급 체계 구축은 국제규범의 수립과 함께 국민복지나 환경보존의 차원에서 필연적이다. 따라서 LCA는 청정생산을 위한 분석능력을 갖추고, 이를 바탕으로 점차 완전한 민영화 상태에서 경쟁구도로 이어질 전력산업 참여자들의 기업가치 극대화에 기여할 필요성이 대두된다. 이를 위해 본 연구에서는 LCA의 역할 확산 경로를 거시적으로는 국제규범과 소비자 만족 그리고 미시적으로는 기업의 가치 극대화와 환경경영체제 수립이라는 측면에서 이루어져야 할 것으로 제시하였다.