• 제목/요약/키워드: green construction

검색결과 1,045건 처리시간 0.031초

A Study on Technology Priorities for Green Highway (녹색도로 구현을 위한 기술 우선순위 결정에 관한 연구)

  • Lee, Yu-Hwa;Cho, Won-Bum;Kim, Se-Hwan
    • International Journal of Highway Engineering
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    • 제14권3호
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    • pp.151-162
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    • 2012
  • It is not surprising to hear news about irresistible natural disasters all over the world due to climate change. Korean Government has focused on developing a variety of green technologies to reduce green house gasses, in particular, carbon dioxide. This study suggested 18 technology divisions for achieving green highway technology development in six different sub-sectors considering life-cycle of roadway and surveyed 29 highway and/or transportation professionals of three institutes using AHP(Analytical Hierarchy Process) analysis to construct "Green Highway"and realize carbon emission reductions and energy use efficiency in a road sector in Korea. Expert Choice Software was used to rank 18 technology divisions weighted by two-level choices. Transport Operating Infrastructure Improvement, Roadway Policy Implementation, Green Transportation(such as Pedestrian and Bicycle) were highly ranked by respondents according to results of the AHP modeling. Among the 18 divisions, technology policy for supporting R&D investments from development to commercialization was ranked as the most significant one to be focused. Green Transportation Facility Design/Construction/Operation and Eco-Friendly Roadway Plan were followed as expected since professionals have thought that the planning/design step of the life-cycle is a starting point to reduce carbon dioxide from roads more and more. Additionally, comparing the results with the Government investment trend 2006-2011 for the roads, it can be interpreted that the Government should invest to the R&D area more widely than before to promote element and core technology development for Green Highway Construction. Above all, small and mid-sized businesses have to be invested as well as encouraged to undertake green highwayrelated objects to accomplish the divisions which ranked high.

Development of a Greenhouse Gas Monitoring System for Construction Projects (건설사업의 온실가스 모니터링 시스템 개발)

  • Kim, Tae Yeong;Park, Hee-Sung
    • KSCE Journal of Civil and Environmental Engineering Research
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    • 제34권5호
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    • pp.1589-1597
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    • 2014
  • For several decades, economic growth has achieved in the aspect of productivity and effectiveness not environmental friendly. As a result, global warming is a major agenda to solve. Therefore, global effort to sustainable development has been adopted like UNFCCC and Kyoto protocol that aimed to reduce greenhouse gas. However, the construction industry has only focused on applying techniques for using less energy sources not monitoring sustainable construction and development. Therefore, this study developed a tool for monitoring greenhouse gas emissions in construction industry. The proposed system evaluates and estimates BAU (Business as usual) for each phase of a construction project. For this purpose, analyzed the greenhouse gas emission factors coincide to life cycle of a construction project. The scope of monitoring is determined according to data availability and emission factor. Then, the system framework is developed and the calculation logic is proposed the system features provide comparison between the emission estimates for eco-friendly design and the actual emission of construction and operation phases. The system would be utilized as a tool for supporting to green construction realization and green construction performance evaluation.

NUMERICAL STUDY ON THE FLOW CHARACTERISTICS OF A HYDRAULIC PISTON PUMP BASED ON THE ANGLE OF THE SWASH-PLATE AND THE DISCHARGE PRESSURE (유압 피스톤펌프의 토출압력 및 사판각도 변화에 따른 유동특성 해석)

  • Yoon, J.H.;Lee, K.;Kang, M.C.
    • Journal of computational fluids engineering
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    • 제21권1호
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    • pp.50-57
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    • 2016
  • In various industries related with construction and military machinery, a large amount of power is normally required because such machinery operations, such as digging or breaking, take place under difficult working conditions in a rough environment. Thus, a hydraulic system needs to be applied as the major power transfer system. To produce and supply hydraulic power depending on the various load conditions, a hydraulic piston pump is utilized as a typical power source for a hydraulic system. In the present study, numerical simulations were conducted using the commercial program, Ansys CFX 14.5. To lubricate the moving parts as the pump starts to operate, a small amount of oil leaks out through the clearance between the orifice in the piston-shoe and the recess at the swash-plate. Taking this into consideration, a cylindrically shaped computational domain was modeled to maintain the same equivalent leakage area. To validate the numerical method applied herein, the numerical results of the flow rate at the discharge port were compared with the experimental data, and a good agreement between them was shown. Using the verified method, the effects of the discharge pressure and the angle of the swash-plate were also evaluated under several load conditions. The results of the present study can be useful information for a hydraulic piston pump used in many different manufacturing industries.

Construction of Environmental-friendly Infrastructure in Saemangeum Reclaimed Land (새만금 간척지 토양특성과 친환경 활용 방안)

  • Seo, Dong-Uk;Jeon, Geon-Yeong;Kim, Hyun-Tae;Song, Jae-Do
    • Proceedings of the Korean Geotechical Society Conference
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    • 한국지반공학회 2010년도 추계 학술발표회
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    • pp.40-48
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    • 2010
  • Saemangeum reclaimed area is needed to construct much green zone to make high-quality multi-functional land such as tide embankment, lake dike, industrial complex, environmental spaces, etc. However, growth of plants is somewhat difficult because a salinity of Saemangeum soil is very high and a soil fertility, water content of soil are low. Therefore, it is essential to initial desalination of soil and continuous management for planting base. It is recommended that a group of grassland to raise the efficiency of covering should be made in the first stage and a forest by improvement of vegetation should be made in the mid and long term stage. It is recommended that the construction of vegetation base should be made with a regular thickness of soil of good quality in multi-functional area such as a shrub and wood. In case of construction of a windbreak forest, it is necessary to make a wood base of suitable depth using soil brought from another place or filling of soil. Also, it is necessary to keep a maintenance of woods in early stage. Saemangeum reclaimed land will be brand-named worldwide tourist attractions due to construction of much green zone having high quality multi-functional facilities.

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The Introduction of Converter Station Construction for HVDC Link Project between Jindo and Jeju (진도~제주간 직류연계 사업을 위한 변환소 건설 개요)

  • Lee, Jong-Seok;Moon, Bong-Soo;Kang, Won-Tag;Kim, Kyeong-Seok
    • Proceedings of the KIEE Conference
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    • 대한전기학회 2009년도 제40회 하계학술대회
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    • pp.357_358
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    • 2009
  • According to the 4th BPE(Basic Plan for long-term Electricity Supply and Demand), Electricity demand of Jeju island in 2012 will be reached to 682MW. Jeju island will be faced with severe shortage of electricty, also needed to find transport route to supply green energy which will be made from "Carbon free island" energy policy toward land at that time. For that reason, The plan which construct 400MW size HVDC connection line was decided for potential supply stabilization and transportation of green energy. KEPCO organized special construction office not only to observe the successful project completion which aims 2011 December but also to build up professional manpower. KEPCO is putting spur to the HVDC project these days. Construction site of converter stations has been already confirmed and contracts of cable, converter have done as per turn-key early this year. On this report, we would like to discuss about project scheme, main characteristics of system, and the furture progress plan of "Jindo~Jeju HVDC construction project expecially converter station part" which is being pushed by KEPCO.

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Characteristics and case study of Low Carbon Green City planning from the perspective of Urban Metabolism (도시 신진대사 관점에서 본 저탄소 녹색도시 계획특성 및 사례 분석)

  • Choi, Joung-Eun;Kim, Jong-Kon;Oh, Deog-Seong
    • KIEAE Journal
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    • 제11권5호
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    • pp.3-12
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    • 2011
  • Industrialization and development of technology satisfied various humanly needs and lay the basis of numerous benefit and profit. New technologies like these mostly required large amounts of fossil Fuel, Fossil energy depletion rate was increasing rapidly. However, technical development for Human race required absolute sacrifice of the environment. Especially, 'City' which had been focused as stage of human activities, allowed to continue to have fossil energy dependent activities, and it shows in many data that the city is responsible for the 75-80% of the green house gas by human. In order to solve the problem relating climate changes and energy, European countries already made progress studies on many of the low carbon green city and pilot case construction. Especially, Germany, Austria, Holland, Sweden who had been playing leader role on environmental awareness and ecological concept, are actively constructing low carbon green city project based on Ecological city planning scheme. These projects positively utilize planning scheme that limits carbon emission using Urban Metabolism concept. Therefore, throughout this study, I would like to present planning and direction of future domestic low carbon green city by analyzing theories relative theories and best practices in Europe.

Enterprise Innovation in The Distribution Sector Such as Logistics and Trade Towards Green and Sustainable Development

  • Thuy Linh NGUYEN;Thi Anh Phuong TRAN;Duc Tam LE;Thong Van PHAM
    • Journal of Distribution Science
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    • 제22권10호
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    • pp.1-12
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    • 2024
  • Purpose: Despite significant commitments between corporations and the government on green supply chain, green logistics and sustainable production, the adoption of green and sustainable trading innovation in Vietnam continues to face many obstacles. The objective of this study is to approach the decision to adopt green and sustainable trading innovation from the perspective of the enterprise. Research Design, Methodology and Approach: A cross-sectional study with the participation of 651 employees and managers at distribution enterprises such as logistics, supply, and delivery enterprises in southern Vietnam was conducted to assess business innovation decisions through innovation awareness. Partial least squares structural equation modelling (PLS-SEM) was proposed to evaluate the structural relationships of the model. Results: The research results show that the decision to innovate an enterprise is directly positively affected by the perception of marketing innovation, process innovation and organizational innovation; in which process innovation and organizational innovation are mediators for the perception of marketing innovation. Conclusions: This study makes a significant contribution by demonstrating the impact of marketing innovation awareness on the entire process that leads to enterprise innovation decisions to fulfil customer expectations and competitive pressure in the context of the green supply chain, green logistics and sustainable production.