• Title/Summary/Keyword: energy resource development

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A Study on the Optimal Size of Government Subsidies to Accomplish the Target Rate for Self-development of Crude Oil (석유자주개발 목표율 달성을 위한 정부지원금의 적정 규모 연구)

  • Kim, Jin Hyung
    • Environmental and Resource Economics Review
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    • v.20 no.4
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    • pp.859-882
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    • 2011
  • Since two oil crises in the 1970s, Korea has actively engaged in overseas E&P projects to increase energy diversity as well as its self-development rate of energy resources. Korea's energy self-development rate, an index that indicates the ratio of resources acquired through overseas development compared to direct imports. Currently, Korea is conducting a total of 180 promising overseas oil development projects in 36 countries as of the end of 2010. By now, it has secured a reserve of around 1.63 billion barrels and production of around 176 thousand barrels of oil per day. The self-development rate for oil rose from 2.8% in 2006 to 7.4% in 2010. Not content with these remarkable successes, the korean government is planning to raise its self-development rate in oil to 25% by 2019, by promoting the active participation of Korean companies in overseas oil development projects. This paper is concerned with estimation of the required amount of government subsidies that includes loans and financial support through state-controlled banking institutions in order to reach the target 25% rate by 2019. The estimation results shows that government subsidies of at least 268 million dollars are needed for the current rate of 7.4% in oil. However, the amount sharply increases up to 1.25 billion dollars in 2019 when domestic oil demand rises to 1.02 billion barrels.

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A Estimation Study on Water Integration Management Model using Water-Energy-Food-Carbon Nexus - Focused on Yeongsan River - (물-에너지-식량-탄소 넥서스를 이용한 통합물관리 모델 평가 연구 - 영산강 수계를 중심으로 -)

  • Na, Ra;Park, Jin-hyeon;Joo, Donghyuk;Kim, Hayoung;Yoo, Seung-Hwan;Oh, Chang-Jo;Lee, Sang-hyun;Oh, Bu-Yeong;Hur, Seung-oh
    • Journal of Korean Society of Rural Planning
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    • v.29 no.1
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    • pp.37-49
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    • 2023
  • Active attention and effort are needed to develop an integrated water management system in response to climate change. In this study, it proposed models for cross-use of agricultural water and river maintenance water using sewage treatment water as an integrated water management system for the Yeongsan River. The impact of the integrated water management models was assessed by applying the concept of Nexus, which is being presented worldwide for sustainable resource management. The target year was set for 2030 and quantitatively analyzed water, energy, land use and carbon emissions and resource availability index by integrated water management models was calculated by applying maximum usable amount by resource. An integrated water management system evaluation model using the Nexus concept developed in this study can play a role that can be viewed in a variety of ways: security and environmental impact assessment of other resources. The results of this research will be used as a foundation for the field of in the establishment of a policy decision support system to evaluate various security policies, as we analyzed changes in other factors according to changes in individual components, taking into account the associations between water, energy, food, and carbon resources. In future studies, additional sub-models need to be built that can be applied flexibly to changes in the future timing of the inter-resource relationship components.

The AC Power System Development For the Big Wind Farm (대형 풍력 농장에 대한 AC 전력시스템 모델링 개발)

  • Zang, Shuai;Choi, Joon-Ho;Sun, Qitao;Cho, Jung-Sub
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.300-302
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    • 2008
  • This paper will discuss the steps in building a wind farm and the modelling of AC power system for wind power generation. And take the JeJu island for an example, with its good wind power energy resource, the most important factor for a wind farm is a good power system interconnection to decrease the power loss including the transmission loss as less as possible. So in this paper, after the JEJU wind energy analysis, we will mainly discuss the development of the modelling on JEJU AC power system by using PSCAD. And also for using the real data of the wind power in the simulation, the modelling of the JeJu power system in 2011 will also be presented in this paper.

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Life Cycle Assessment on bogie system of Korea TTX (한국형 틸팅열차의 대차에 대한 전과정평가)

  • Lee, Cheul-Kyu;Jeon, Yong-Sam;Lee, Jae-Young;Kim, Yong-Ki
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.2195-2199
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    • 2008
  • The concern on sustainable development is increased to solve the global warming which is environmental issue over nations. Sustainable development is the concept of minimizing the consumption of resource and environment burden. In transportation, there are some trials of shifting to green transportation mode through low energy consumption and high efficiency. Korea Tilting Train eXpress (TTX) can run higher speed than existing train and save energy through light weight. In this study, Tilting bogie, the core equipment of tilting train, was compared with that of existing train.

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Development of Simulation Model for PEMFC Hybrid Excavator (연료전지 시스템을 적용한 하이브리드 굴삭기 해석 모델 개발)

  • Lee, Se Young
    • Journal of Drive and Control
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    • v.16 no.3
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    • pp.16-22
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    • 2019
  • Due to the rise in energy consumption and natural resource prices, the demand to improve energy efficiency in the construction machine has been highlighted. Even though many researchers have contributed to the development of the technology, CO2 gas emissions of heavy machinery remains high. One of the most significant problems of the novel excavator with internal combustion engines is the emission of harmful gas. To reduce emissions in the construction machine, it is necessary to replace the internal combustion engines with the alternative one. To overcome those problems, this paper focuses on the adoption of PEMFC hybrid engine for the excavator system. An internal combustion engine is replaced by new structures with fuel cell, battery and ultra capacitor. The proposed system has been designed and modeled using Simcenter Amesim software and compared with the conventional one through simulation results.

Evaluations on the Compaction Energy Effects on the Soil Compaction at Sub-Zero Temperature (영하에서의 다짐에너지에 따른 다짐 효과 평가)

  • Lee, Jeonghyeop;Hwang, Bumsik;Chae, Deokho;Cho, Wanjei
    • Journal of the Korean GEO-environmental Society
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    • v.16 no.8
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    • pp.13-20
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    • 2015
  • Due to the population growth and exhaustion of resource, the development on the harsh environment such as cold weather is emerging as an alternative for new resource development. The permafrost area covers about 14 percent of the world's land area and the global construction market for such area is rapidly expanded. Whereas the developed countries have already recognition of the need for research of coldest place and invested heavily in technology development, the domestic technology for the coldest place development is less developed and related research has rarely been performed. There is not a detailed national specification standard for the strength and deformation properties of the earthworks at sub-zero temperature but simple field directions. Therefore, the D compaction tests were conducted on the sand with fine contents of 0%, 5%, 10% and 15% at room temperature ($18^{\circ}C$), $-3^{\circ}C$ and $-8^{\circ}C$ to investigate the effect of the compaction energy on the compacted soils at sub-zero temperatures. Based on the test results, the larger compaction energy, the larger maximum dry unit weight under sub-zero temperature and D type compaction at $-3^{\circ}C$ show similar max. dry unit weights as those obtained from the compaction at the room temperature. However, compaction at $-8^{\circ}C$ showed significant performance degradation regardless of the compaction energy.

A Study on Economic Evaluation of Small KSO Field in Indonesia (인도네시아 소규모 KSO 광구의 경제성 평가 연구)

  • Moon, Seo-Yoon;Choi, Youngil;Lim, Jong-Se;Huh, Seung-Kyun;Jeong, Kwang-Seok
    • Journal of the Korean Society of Mineral and Energy Resources Engineers
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    • v.55 no.6
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    • pp.624-634
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    • 2018
  • Indonesia has become a net crude oil importer because of the reduction of a new oil field discovery, and Indonesia is attempting to raise investment funds through the Kerja Sama Operasi (KSO) contract to develop a small-scale field. However, the KSO has a high-risk and low-return contract system for investors, necessitating an economic evaluation to examine the feasibility of the project. This study performed economic evaluation on the development of an Indonesian small-scale field by applying the KSO contract conditions, and identified the major economic parameters through a sensitivity analysis. As a result, the oil price, CAPEX and OPEX were identified as influential factors for economic evaluation. The results also indicate that commercial production in small-scale fields is difficult. In the future, this study can be used as a reference resource for investment in oil and gas development projects in Indonesia.

A Study on the Optimal Design of Urban Energy Supply Systems (도시기반 에너지공급시스템의 최적화 방안 연구)

  • Kim, Yong-Ki;Lee, Tae-Won;Woo, Nam-Sub
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.33 no.6
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    • pp.396-402
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    • 2009
  • Recently many efforts have been carried out on the development of energy-efficient and environment-friendly systems in order to preserve natural environment and to reduce environmental loads in the branch of the urban planning and the building design. In this study, a mathematical method was developed and a numerical analysis was carried out with various parameters to provide substantial data for optimal design and operation of urban energy supply systems. Components of the system and their specifications, such as a co-generation system and other heating and cooling systems, could be obtained through this analysis for various resource and energy requirements in urban area. In this study, the system constituents and operating characteristics, and their economic performances such as the value of objective function, the amount of energy consumption were discussed for various load patterns and power load ratios. Also, it turns out that the optimal energy supply system can save energy by $10{\sim}20%$ in comparison with the conventional energy supply system.

A Study on Tidal Current Energy in the Sea near Wando (완도해역의 조류에너지 자원에 관한 연구)

  • Yang, Chang-Jo
    • Journal of Advanced Marine Engineering and Technology
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    • v.35 no.1
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    • pp.126-132
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    • 2011
  • With the worldwide trend of controlling the utilization fossil fuels inducing global climate change, many efforts will have to be made on securing stable supply of the energy due to UNFCCC. Tidal currents are a concentrated form of gravitational energy. Tidal current resource is significant, but limited locations. Technical and economic feasibility demonstration is the next needed step in the technology development process. So, we investigated overview of tidal in-stream energy in the sea near Wando, and then analytically estimated tidal energy resources and annual energy output of TECS arrays.

Characteristics of Wind Energy for Long-term Period (10 years) at Seoguang Site on Jeju Island (제주 서광지역에 대한 풍력에너지의 장기간 (10년) 특성)

  • Ko, Kyung-Nam;Kim, Kyoung-Bo;Huh, Jong-Chul
    • Journal of the Korean Solar Energy Society
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    • v.28 no.3
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    • pp.45-52
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    • 2008
  • In order to clarify characteristics of variation in wind energy over a long-term period, an investigation was carried out at Seoguang site on Jeju island. The wind data for 10 years from Automatic Weather System (AWS) were analyzed for each year. The variation in the annual energy production (AEP) for the 2 MW wind turbine was estimated through statistical work. The result shows that the range of the yearly average wind speed at 15 m above ground level for 10 years was from -22.6% to +13.7%, which is wider range than that in Japan. The coefficient of variation for the AEP was 22.7%, which is about twice of that for the yearly average wind speed. Therefore, for estimating the wind energy potential accurately at a given site, the wind data should be analyzed over a long-term period based on the data from the meteorological station.