• Title/Summary/Keyword: LNG 사업

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Status of Gas Hydrate Technology Development (가스하이드레이트 기술개발현황)

  • Ahn, Young-Hun
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.06a
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    • pp.686-686
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    • 2009
  • 가스하이드레이트는 수소결합을 하는 물분자의 고체상 격자(Lattice)내에 포집되어 들어가는 기체분자로 구성된 결정화합물로서 외형적인 형태는 얼음과 거의 유사하다. 천연가스 하이드레이트 기술의 최대장점으로는 액화천연가스(LNG)는 초저온인 $-162^{\circ}C$의 저장조건이 필요하지만 천연가스하이드레이트(NGH)기술은 비교적 온화한 조건인 $-15^{\circ}C$에서 천연가스를 고체상태로 저장/이용할 수 있다는 것이다. 천연가스를 $-162^{\circ}C$에서 액화시킨 LNG상태로 생산, 수송, 저장하는 경우보다 고체상태인 NGH(Natural Gas Hydrate)로 만들어서 생산, 수송, 저장할 경우 천연가스의 생산, 수송, 저장, 재가스화 등의 일련의 공정과 비교해볼 때 LNG방법보다 약 24%이상의 경비를 절감을 할 수 있다고 보고되어지고 있다. 따라서, 천연가스의 수송 및 저장기술에서의 탁월한 경제성으로 인해 선진국에서는 가스하이드레이트에 대한 활발한 연구가 진행되고 있다. 특히 일본은 5Ton/Day용량의 NGH 생산플랜트를 건설하여 시운전 중에 있다. NGH기술의 주요 활용분야는 대용량의 가스매장량을 요구하여 LNG공정기술을 적용할 수 없는 중소형가스전 또는 한계가스전에 경제적으로 적용하는 해양수송분야와 천연가스 공급망이 갖춰져 있지 못한 지역에 NGH Pellet형태로 수송/재기화하여 활용하는 내륙운송이 분야가 있다. 국내에서는 지식경제부 국책과제인 ETI(Energy Technology Innovation)사업을 시작으로 국가경쟁력 제고 차원에서 이러한 기술의 기반구촉 및 실증화 사업이 진행되고 있다. 주요 내용으로는 NGH Process Flow, Overall NGH Process concept diagram, NGH Carrier outline, NGH Land Transportation chain 등이 포함되어 있다.

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Risk Identification and Priority method for Overseas LNG Plant Projects - Focusing on Design Phase - (해외 LNG 플랜트 리스크요인 도출 및 우선순위 평가 - 설계단계를 중심으로 -)

  • Jang, Woo-Sik;Hong, Hwa-Uk;Han, Seung-Heon
    • Korean Journal of Construction Engineering and Management
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    • v.12 no.5
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    • pp.146-154
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    • 2011
  • Korean contractors have been maintained sustainable growth since entering into overseas construction market for the first time in 1960' s. In 2010, Korean contractors ordered 761 billion (USD) from overseas markets. Especially, billion (USD) were earned by Korean contractors in overseas plant construction market which account for more than 80% of the total amount by Korean contractors. Nevertheless, many Korean contractors are suffering from lack of technological competitiveness and construction management skills in the design phase compared with global leading contractors. These conditions have directly effect on the success of projects in terms of cost, duration, and quality. So, this study focused on identifying the risk factors and developing risk priority method for the design phase of LNG plant projects whose market is expanding. Research procedures were conducted by the following three steps. First, total 57 risk factors were identified in design phase through extensive literature reviews and experts survey. Second, the authors developed risk priority method which are more suitable for design phase of LNG plant projects by using three criteria, Probability(P), Impact(I), and Coordination Index(CI). Finally, the suitability of risk priority method and practical applicability were verified through expert survey and interview. Consequently, if korean contractors use the suggested risk factors and priority method based on their own know-how and experiences, then more reasonable and rational risk management will be conducted in the design phase of LNG plant projects.

가스플랜트 기술개발사업의 필요성 및 추진방향

  • Yang, Yeong-Myeong
    • The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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    • v.38 no.3
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    • pp.4-12
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    • 2009
  • 국토해양부의 가스플랜트사업단에서 추진하고 있는 LNG 플랜트와 GTL 플랜트에 대한 기술개발 사업추진의 필요성 및 추진방향을 소개한다.

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Analyses of GHG Reduction Effectiveness and Economic Feasibility in the Wood Pellet Fuel Switching Project (목재 펠릿 연료전환 사업의 온실가스 감축 효과 및 경제성 분석)

  • Lee, Jin-Chul;Kang, Kyu-Young
    • Journal of the Korean Wood Science and Technology
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    • v.41 no.6
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    • pp.594-605
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    • 2013
  • This study was performed to analyze GHG (Greenhouse gas) reduction effectiveness and economic feasibility in the wood pellet fuel switching project using JCDM (Japan Clean Development Mechanism) and KVER (Korea Voluntary Emission Reduction)data. The major data for the analyses consist of investment costs, annual GHG reductions, fuel prices and GHG credit prices. The wood pellet fuel switching projects are the $CO_2$-zero projects. Therefore, these projects are essential to accomplish the GHG mitigation target, especially in Korea. In order to raise the economic feasibility of the wood pellet fuel switching project, the results of this study suggest that the Korean government should reduce the price of wood pellet through the supply on a large scale and raise the KCER price of wood pellet fuel switching project.

Internal Pressure Variation Analysis and Actual Holding Time Test on ISO LNG Tank Container (LNG 탱크 컨테이너의 내부압력 변화 분석 및 실제 홀딩타임 측정)

  • Ryou, Young-Don;Lee, Jin-Han;Jo, Young-Do;Oh, Young-Sam;Cha, Kyong-Ho
    • Journal of the Korean Institute of Gas
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    • v.17 no.6
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    • pp.1-7
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    • 2013
  • Internal pressure variation analysis and actual holding time test on ISO LNG tank containers which were made in Korea for the first time according to the special notification of ISO tank container manufacture have been conducted during the transport demonstration projects of the tank containers by tractor, train and ship. The internal pressure of the LNG tank container increased rapidly after LNG filling and dropped during moving the container. However, it was stabilized as time passed and followed the liquid-vapor equilibrium graph. In addition, actual holding time of the tank container was more than 20 days which was satisfied with the special notification of LNG tank container manufacture.

A Development of Condition Evaluation Standard Considering Structural Characteristic for Members of LNG Outer Storage Tanks (LNG 외조 저장탱크의 구조적 특성을 고려한 상태평가 기준 개발)

  • Choi, Kyoung-Jae;Seo, Chang-Joo;Kim, Young-Gu;Jo, Young-Do;Kim, Jung-Hoon
    • Journal of the Korean Institute of Gas
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    • v.21 no.5
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    • pp.64-69
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    • 2017
  • South Korea is the world's second-largest importer of LNG and possess about 70 tanks which are in operation by 2017. Thirty years as the design warranty period have exceeded since LNG storage tanks as the core facility of LNG industry were constructed in 1986. The LNG storage tank is under precision safety diagnosis from 2014 due to urban gas business act amendment. There is no criteria of condition evaluation for outer tank of LNG storage tank at the time of precision safety diagnosis. Through analysis of structural characteristic of LNG storage tank and civil structure condition evaluation standards, the criteria of condition evaluation for main members was developed. The criteria of objective condition evaluation can improve safety and reliability of LNG storage tank and suggest matenance criteria.

Analysis of Pre-construction Processes and Development of KMS Prototype of LNG Plant Projects (해외 LNG Plant 프로젝트 초기 프로세스 분석 및 지식관리시스템 프로토타입 구축)

  • Won, Seo-Kyung;Lee, Jun-Bok;Han, Choong-Hee
    • Journal of the Korea Institute of Building Construction
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    • v.9 no.6
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    • pp.151-159
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    • 2009
  • Recently, overseas construction projects have been increasing in the Middle East and Southeast Asia regions. These projects require various licenses and technologies for the manufacturing and handling processes. Additionally, the efficiency of the entire process management life cycle determines the success or failure of the business. Nonetheless, there exist various risks involved in the whole life cycle process due to a lack of experience and knowledge of management techniques. The objective of this paper is to analyze the business process of a LNG plant throughout the pre-construction and procurement phases, and to identify the knowledge and information needed for the development of the KMS. The study also plans to build a comprehensive knowledge management system throughout the whole life cycle as its final objective.

Technology Valuation Evaluation Model of Decision Making System using Income Approach for Commercialization in LNG Plant Construction (수익접근법을 활용한 LNG 플랜트공사의 의사결정지원시스템 기술가치 평가)

  • Park, Hwan Pyo;Han, Jae Goo;Chin, Kyung Ho
    • Korean Journal of Construction Engineering and Management
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    • v.15 no.4
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    • pp.58-67
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    • 2014
  • The proportion of investment in national R&D projects in construction and transportation has been increasing continuously; in terms of the size of R&D projects, there are many medium- to large-sized projects of over KRW 10 billion. However, in spite of such continuous increase in R&D investments, there are many technologies developed but not commercialized, i.e., the quiescence of technology. Accordingly, it is necessary to link the R&D results to commercialization by expanding the scope of R&D projects. In this context, this study presented objective reference prices to be used in contracting/transacting technology and implementing commercialization strategy by conducting technology valuations against on-going research projects with earnings approach, and by estimating value of patented technology. Sum of free cash flow (business value) that can be generated during the life of the technology was estimated as KRW 512 million by reflecting a discount rate of 16.34% to convert it into the present value. In addition, the technology value was computed as KRW 227million by applying a technology factor of 44.39% to the above value. Based on the technology value estimated in this way, it is necessary to establish industrialization and commercialization strategy of the technology.