• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.723-727
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• 2015

Building energy use estimation relies on building characteristics, its energy systems, occupants, and weather. Energy estimation of new buildings is considerably an easy task when compared to modeling existing buildings as they require calibration with actual data. Particularly, when energy estimation of existing building stock is warranted at a city-scale, the problem is exacerbated owing to lack of construction drawings and other engineering specifications. However, as collection of buildings and other infrastructure constitute cities, such predictions are a necessary component of developing and maintaining sustainable cities. This paper uses Artificial Neural Network techniques to predict electricity consumption for residential buildings situated in the City of Gainesville, Florida. With the use of 32,813 samples of data vectors that comprise of building floor area, built year, number of stories, and range of monthly energy consumption, this paper extends the prediction to environmental impact assessment of electricity usage at the urban-scale. Among others, one of the applications of the proposed model discussed in this paper is the study of urban scale Life Cycle Assessment, and other decisions related to creating sustainable cities.

• KIEAE Journal
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• 제16권3호
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• pp.57-62
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• 2016

Purpose: A lot of active researches have addressed the impact of a building on global environment, but most of the researches focus on a residential building and a large office building. Hereupon, this study assessed the impact on environment quantitatively through the analysis of input materials targeting a school building. Method:This study calculated embodied energy of input materials suggested in a construction statement on a school building using the input-output analysis. This study finally carried out environmental impact assessment by applying LCIA DB shown in the preceding researches to the calculated embodied energy. Result: The analysis result revealed that the environmental impact per unit area(/$m^2$) at a school building was $4.11E-02PE{\cdot}yr$, among which Construction was found to be $3.59E-02PE{\cdot}yr$, being analyzed to account for about 87% of the total environmental impact. Also, as a result of detailed environmental impact, the impact on global warming among the total environmental impact was analyzed to be high, accounting for about 76%.

• 한국환경과학회지
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• 제22권3호
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• pp.281-289
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• 2013

For the purpose of evaluating the eco-efficiency(EE) on surplus heat generated from industrial process, techniques of life cycle assessment are adopted in this study. Because it can be indicated both environmental impacts and economic benefits, EE is well known as a useful tool for symbiosis network on the sustainable development of new projects and businesses. To evaluate environmental impacts, the categories were divided into two areas of resource depletion and global warming potential. It can be seen that environmental impact increased a little but much higher economic benefit on the company, environmental performance and economic value were improved on the apartment by the district heating, respectively. In result, eco-industrial park(EIP) project on surplus heat should be found sustainable new business because the EE was in the area of fully positively eco-efficiency and, moreover resource depletion was taken place than the reduction of greenhouse gas.

• 한국포장학회지
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• 제25권1호
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• pp.1-10
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• 2019

이번 연구에서는 식품 포장재로 많이 활용하고 있는 산소 고차단성 필름 두 종류의 환경 영향을 평가하는 것이었다. Table 4의 경우 환경 영향 모델에 따라 계산된 Traditional film과 New film의 각 환경 영향 범주 별 비교 값 및 이러한 차이를 보인 가장 영향력 있는 공정을 설명하였다.

• 대한조선학회논문집
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• 제60권5호
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• pp.358-366
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• 2023

Due to the International Maritime Organization's (IMO) environmental regulations on NOx and SOx, LNG-fueled eco-friendly ships are gaining attention worldwide, and various eco-friendly ships are being proposed and demanded for conversion to eco-friendly ships in Korea, as the eco-friendly ship law has recently been enforced. In this study, the initial basic design was performed to convert an existing Marine Gas Oil (MGO) fueled ship into an LNG-DF propulsion ship, targeting medium-sized ship, to select the fuel tank capacity and main dimensions and appropriate fuel ratio between the two fuels. In particular, Sustainable basic design method considering environmental impact were proposed by performing a Life Cycle Assessment (LCA) throughout the design process, and various design options were compared and analyzed to meet different design conditions by applying them.

• 한국포장학회지
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• 제29권3호
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• pp.181-193
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• 2023

In this study, we conducted a comparative life cycle assessment (LCA) of two different products, considering reusable and single-use packaging for fresh food distribution. For reusable packaging, we utilized expanded polyethylene (EPE), while for comparison, a disposable box made of widely used expanded polystyrene (EPS) was selected. We comprehensively analyzed the environmental impacts of production, transportation, reprocessing (for reused boxes), and disposal across 18 impact categories. Upon analyzing the actual reuse of 300 rounds of fresh food, the cumulative global warming potential (GWP) values for the EPE box were found to be 280.21 kg carbon dioxide (CO₂) eq, demonstrating a significant 75% reduction compared to those of the EPS box. Furthermore, it was observed that the GWP values for the EPE boxes became equivalent to those of the EPS boxes after 12 rounds of reuse. In conclusion, reusable packaging shows substantial potential to contribute to the reduction of environmental burdens, aligning well with global environmental requirements for sustainable food distribution and related industries.

• 한국철도학회논문집
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• 제18권6호
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• pp.558-566
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• 2015

본 연구에서는 일반 앵커와 확공지압형 앵커 시스템에 대하여 전과정평가(LCA)를 수행하고 환경영향 특성을 분석하였다. 또한, 평가결과를 비교 분석하여 개발된 확공지압형 앵커 시스템의 환경저감 개선효과를 확인하였다. 환경영향범주별 기여도 분석결과, 두 앵커 시스템 모두 지구온난화가 대부분을 차지하는 것으로 나타났다. 개발된 확공지압형 앵커 시스템의 환경저감효과를 확인하기 위해 환경영향범주에 대한 정규화 결과, 모든 항목에서 확공지압형 앵커 시스템의 환경성이 개선된 것으로 나타났으며, 광화학 산화물 생성분야가 77%로 가장 크게 개선되었다. 최근 지구온난화와 관련하여 전세계적으로 관심이 고조되고 있는 온실가스 배출량은 약 44% 감소한 것으로 나타났다. 이러한 정량적인 환경영향평가 결과는 향후 토목분야 영구앵커 공법에 대한 환경영향평가시 기초자료로 활용할 수 있을 것으로 판단된다.

• 청정기술
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• 제14권2호
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• pp.144-151
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• 2008

천연가스로부터 합성가스를 거쳐 제조되는 디메틸에테르가 디젤 대체연료로서 가지는 환경적 가치를 평가하기 위하여 전과정평가를 실시하였다. 전과정평가를 위한 시스템 경계 안에는 디젤과 디메틸에테르 두 물질에 대한 원료 물질의 획득부터 연소를 통한 최종 소비까지의 과정이 포함되었다. 디젤과 디메틸에테르 각각에 대한 목록분석을 실시한 결과 천연자원의 소모와 대기오염물질의 배출이 두 물질과 관련된 가장 중요한 환경오염인자라는 것을 알 수 있었다. 두 물질에 대한 영향평가의 결과로부터 인간의 건강과 생태계 보전이라는 측면에서는 디메틸에테르가 환경적으로 우수하지만 천연자원의 고갈이라는 측면에서는 디젤이 보다 우수함을 알 수 있었다. 목록분석과 영향평가의 결과를 바탕으로 디젤 대체연료로서 디메틸에테르가 가지는 환경적 가치를 제고하기 위한 방안을 제시하였다.

• 대한환경공학회지
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• 제29권6호
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• pp.722-727
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• 2007

전과정평가(Life Cycle Assessment; LCA)는 전과정에 걸친 투입과 산출을 정량화하고, 잠재적인 환경 영향을 평가하는 도구이다. 기존 LCA 방법은 시간을 명확하게 고려하지 않는다는 결함이 있다. 또한 정규화(normalization)단계에서도 시간 경계에 관한 문제가 존재한다. 본 연구의 목적은 시간이 고려된 새로운 LCA 방법을 제안하는 것이다. 본 연구에서 제안하는 새로운 LCA 방법론인 '시간-부하 LCA'는 각각의 전과정단계에서 발생하는 환경 부하를 해당 전과정단계에서 소요되는 시간으로 나누는 것이다. 전과정평가에서 시간 고려를 명확히 함으로써 제품 시스템의 환경 영향에 대한 새로운 관점을 제공할 수 있을 뿐만 아니라 정규화 단계의 시간 단위 불일치를 보완할 수 있다. 시간-부하 LCA의 기본 전제는 같은 양의 환경 부하라 하더라도 짧은 시간 동안 발생하는 환경부하가 긴 시간 동안 발생하는 환경 영향보다 더 튼 환경 영향을 미칠 수 있다는 것이다. 그러므로 목록 파라미터가 환경에 미치는 영향을 평가할 때 시간 당 부하를 고려할 필요가 있다.

• Journal of Construction Engineering and Project Management
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• 제3권3호
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• pp.1-9
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• 2013

Environmental problems like global warming have now become important issues that should be considered in all industries, including construction. In South Korea, many studies have been conducted to achieve the government's goals of reduction in environmental impacts. However, the research on buildings has only focused on CO2 emission as a research target despite the fact that other environmental impacts resulting from ozone depletion and acidification should also be considered, in addition to global warming. In this regard, this study attempted to propose assessment criteria and methods to evaluate the environmental performance of the structures from various aspects. The environmental impact category can be divided into global impacts, regional impacts, and local impacts. First, global impacts include global warming, ozone layer depletion, and abiotic resource depletion, while regional impacts include acidification, eutrophication, and photochemical oxidation. In addition, noise and vibration occurring in the building construction phase are defined as local impacts. The evaluation methods on the eight environmental impacts will be proposed after analyzing existing studies, and the methods representing each environmental load as monetary value will be presented. The methods presented in this study will present benefits that can be obtained through green buildings with a clear quantitative assessment on structures. Ultimately, it is expected that if the effects of green buildings are clearly presented through the findings of this study, the greening of structures will be actively expanded.