• Environmental and Resource Economics Review
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• v.18 no.4
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• pp.787-813
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• 2009

Because of global warming, the thawing of the Arctic ice cap is slowly accelerating. That is the hot issue nowadays. According to the each country's climate change policy, it is boom in the world to lessen the consuming of the fossil fuel those are oil, coal and natural gas. But on the contrary the thawing of the Arctic ice cap is the chance to make the natural gas producing unit cost lower. The purpose of this paper is to search the Arctic policy of each country under the contradictory relationship between promoting the climate change policy and exploiting the natural gas on the Arctic. Specially, there are huge natural gas reserves in Russia on the Arctic region, Russia's exploiting the natural gas on the Arctic will affect on the natural gas supply-demand balance of world natural gas market strongly in the future. Therefore it needs to prepare the future energy alternative policy for Korea's energy security. Russia has Yamal Peninsular where is abundant on natural gas reserver, and she can supply natural gas by LNG ship all over the world via the Arctic route. This means that the structure of world natural gas market be changed gradually. It will be possible in 2030~2040. And such a change is very important because new natural gas trading type can do it through not only overcoming the geological restriction but also shifting the main trading type from PNG(Pipeline Natural Gas) to LNG(Liquified Natural Gas). Therefore it is necessary that we should let this be a good lesson to ourselves through the government action of other countries (China, Japan) those also have no sovereignty over the Arctic as Korea.

• Journal of the Korean Professional Engineers Association
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• v.12 no.2
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• pp.8-12
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• 1979

• Journal of the Korean Institute of Gas
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• v.23 no.4
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• pp.19-27
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• 2019

The consumption of liquefied natural gas (LNG) has increased annually due to the strengthening of international environmental regulations. In order to produce stable and efficient LNG, it is essential to divide the global (overall) operating condition and construct a quick and accurate monitoring system for each operation condition. In this study, multi-mode monitoring system is proposed to the LNG plant fractionation process. First, global normal operation data is divided to local (subdivide) normal operation data using global principal component analysis (PCA) and k-means clustering method. And then, the data to be analyzed were matched with the local normal mode. Finally, it is determined the state of process abnormality through the local PCA. The proposed method is applied to 45 fault case and it proved to be more than 5~10% efficient compared to the global PCA and univariate monitoring.

• 한국가스학회:학술대회논문집
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• 2006.11a
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• pp.251-256
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• 2006

LNG 냉열 활용에 대한 관심은 유가의 고공행진과 더불어 고조되고 있다. 본 연구는 생산기지 내에서 LNG 냉열의 이용현황 및 활용 가능량에 대한 분석을 토대로 LNG를 사용하는 6대 냉열사업에 대한 타당성 연구를 수행하였다 하절기 생산기지 내에서 냉열의 활용 가능량은 전체 냉열량의 30%로 LNG kg당 약 60kcal 정도로 매우 적다. 또한 생산기지 내에서 천연가스 송출량이 시간대별로 크게 차이가 발생되기 때문에 실질적으로 활용 가능한 양은 이것보다 적은 것으로 나타났다. 6대 냉열사업은 공기액화분리, 냉열발전, 저온분쇄, 액화탄산 및 드라이아이스, 냉동 및 냉장창고, 지역냉방사업이고, 사업화 가능성에 대한 타당성 연구를 수행하였다. 본 결과 전체 냉열사업의 투자비 회수기간이 15년 이상 상회하는 것으로 나타났다. 현시점에서 냉열사업 자체의 외국기술 의존도 때문에 막대한 초기투자비가 필요하고, 생산품의 부가가치가 낮으며 기존 시장에서 경쟁력을 확보하기가 어려운 것으로 평가되었다.

• Journal of Energy Engineering
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• v.8
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• pp.74-85
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• 1999

우리 나라는 1970년대에 두 차례에 걸친 석유 파동을 겪으면서 에너지 정책의 중점 방향을 에너지 수요 관리와 안정적 에너지 공급 기반 조성 등으로 삼았다. 특히 에너지의 안정적 공급을 위하여 에너지원의 다원화, 수입선 다변화, 그리고 해외자원 개발 등이 추진되었다. 이러한 에너지 정책의 일환으로 천연가스의 도입이 적극 추진되어, 1983년 8월 한국가스공사가 설립되었으며, 1986년 10월 국내 최초로 액화천연가스(LNG)가 수입되고 다음달부터 공급되기 시작하였다. (중략)

• Journal of Advanced Marine Engineering and Technology
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• v.41 no.4
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• pp.337-344
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• 2017

The demand of liquified natural gas is increasing due to environmental issues. This reason has resulted in increasing the capacity of liquified natural gas cargo tank. The Mark-III type primary barrier directly contacts liquified natural gas. Also, the primary barrier is under various loading conditions such as weight of liquified natural gas and sloshing loads. During a ship operation, various loads can cause fatigue failure. Therefore, the fatigue life prediction should be evaluated to prevent leakage of liquified natural gas. In the present study, the fatigue analysis of insulation system including primary barrier is performed using a finite element model. The fatigue life of primary barrier is carried out using a numerical study. The value of principle stress and the location of maximum principle stress range are calculated, and the fatigue life is evaluated. In addition, the effects on the insulation panel status and the arrangement of knot or corrugation are analyzed by comparing the fatigue life of various models. The insulation system which has best structural performance of primary barrier was selected to ensure structural integrity in fatigue assessment. These results can be used as a design guideline and a fundamental study for the fatigue assessment of primary barrier.

• 월간 기계설비
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• s.282
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• pp.60-61
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• 2014

• Korea Petroleum Association Journal
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• no.11 s.129
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• pp.52-63
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• 1991

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.181-181
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• 2017

• Journal of the Korean Institute of Gas
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• v.13 no.6
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• pp.44-48
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• 2009

In this paper, two different types of natural gas liquefaction cycle with 2 staged compression were designed and simulated to develop liquefaction process which is the core technology in the Industry of natural gas liquefaction plant. These include the cascade cycle with inter-cooler which is consisted of propane, ethylene and methane cycle. One of these is that liquid-gas heat exchanger is applied to between methane and ethylene cycles, and another is that liquid-gas heat exchanger is added to between ethylene and propane on the above process. Also, these cycles are compared with two staged cascade process using an inter-cooler. The COP of process2 is shown about 14.0% higher than that of process1, respectively. Also, the yield efficiency of LNG improved comparing with process1 with 11.5% lower specific power.