• 한국수소및신에너지학회논문집
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• 제34권3호
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• pp.235-245
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• 2023

Techno-economic analyses on a 5-MW water electrolysis system for hydrogen production, operated in Jeju Island where the portion of renewable energy in the power grid is the highest in Korea, have been performed. The cost of hydrogen production and the economic feasibility of the hydrogen production system have been mainly analyzed based on the levelized-cost-of-hydrogen model. The effects of carbon emission trading and renewable power purchase method have been considered to reduce the cost of green hydrogen production in the case studies. This economic analysis model is expected to be used to derive a business model for green hydrogen production.

• 산업경영시스템학회지
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• 제41권3호
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• pp.1-10
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• 2018

The purpose of this study is to improve effectiveness of Korea's Official Development Assistance (ODA) provided to developing countries. To do this, we analyze the efficiency of ODA provided to 38 recipient countries by Korea through data envelope analysis method. The effects of four factors including population, GDP, economic decline and poverty, and external intervention on efficiency are also investigated by utilizing tobit regression analysis. As a result of the DEA efficiency analysis, it is found that the average efficiency score of the total is about 59%. By region, the average efficiency score of Asia, Africa, Central and South America, and the East and CIS (Commonwealth of Independent States) are about 42%, 68%, 70%, and 74%, respectively. It indicates that the Asian countries are inefficient compared to countries of the other regions. It is also found that factors of population, GDP, economic decline and poverty, and external intervention have statistically significant effects on efficiency at 0.01 significance level. In the case of the population, the higher the population of the recipient country, the more negative (-) effect is on the efficiency. The other factors such as GDP, economic decline and poverty, and external intervention have positive effects on the efficiency.

• 대한토목학회논문집
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• 제30권5D호
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• pp.513-522
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• 2010

도시인구 과밀현상, 지상도로교통망 포화 등의 문제를 해결하기 위한 효율적 토지활용방안으로 지하도로교통망, 복합단지, 저장시설 등 다양한 형태의 지하구조물 건설이 증가하고 있다. 본 연구에서는 지하구조물 시공 시 열악한 환경에 적합한 작업자의 3차원 위치와 통신 연락을 위한 현장지원 통합관리시스템 개발의 경제적 타당성 분석을 수행하였다. 본 분석을 위해 터널 및 지하철건설을 대상으로 현장조사 및 작업자 설문조사를 수행하여 현행 지하구조물 건설 현장관리 프로세스 분석, 문제점 파악 및 시스템 도입을 통해 발생할 것으로 예상되는 편익의 정량적 도출을 실시하였으며, 본 시스템 도입으로 발생할 것으로 예상되는 사고감소, 현장관리비 절감, 생산성 향상을 편익으로 추정하고 경제성 분석기법인 편익/비용비(B/C), 순 현재가치(NPV), 내부수익률(IRR)을 활용하여 시스템 도입의 경제적 타당성 분석을 수행하였다. 분석 결과, 편익/비용비는 1.79로 도출되었으며, 순현재가치와 내부수익률은 각 103,423,797원, 47.01%로 산출되어, 본 시스템 도입의 경제성을 확보할 수 있는 것으로 분석되었으며, 변수들의 불확실성을 고려하여 민감도 분석을 실시하였다.

• Asian Journal of Business Environment
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• 제7권3호
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• pp.23-31
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• 2017

Purpose - The purpose of this paper is to rationale the new approach to analysis of the human capital as a factor of effective development of a national economy and increase the level of country's competitiveness. Research design, data, and methodology - This research aims the furthest development of the conception in human capital formation. The study made on the base of the methods with scientific classification and systematization, that is, comparative, statistical analysis, economic-mathematic method, and expert assessment and ratings. Results - This research attempted to measure the correlation between the human capital elements and the level of country's competitiveness. The study revealed that formation of the competitive human capital cannot be considered in separation from the development and modernization of education system, the improvement of employment sphere, and the creation of effective interaction between them through the system of professional skills. Conclusions - The competitive human capital formation is one of the most important goals in the innovative economy construction and modern development, and it is also indispensable subject. Especially in the condition of economic crises, the necessity of formation and development of the effective human capital is considerably increasing. Realization of this task requires the development and stimulation of all the factors influencing the growing human potential.

• 한국시스템다이내믹스연구
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• 제11권4호
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• pp.25-59
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• 2010

The Korean government has operated various mega-development projects in order to help nation progress into the future. However, many problems and concerns have been raised on the mega-projects' delay and failure in South Korea. Moreover, there are many technical and executive problems; such as trial and error of development work, failure of validity test, complicated decision-making processes, and so on. With these concerns and problems to mega-development projects, finding a sustainable development from mega-projects is becoming a new issue in the field of mega-development projects. Therefore, the main purpose of this study is to investigate whether or not most mega-development projects conducted by the government exactly corresponds with sustainable development (such as environmental soundness, economic efficiency and social equity) focusing on Saemangeum project. Using causal loop analysis, this study gives some significant results to us. First, for environmental soundness, both central and local government should ensure water-purity control system for farming, industry, leisure, and others. Second, for economic efficiency, both governments not only have to secure a budget for completion of infrastructure of the Saemangeum project but also support financial assistance to Saemangeum project. Third, for social equity, three local governments (i.e., Gunsan, Gimje, and Buan) should stop debate and conflict with regard to an administrative district of Saemangeum region. Finally, most politicians should not use Saemangeum project for political means. Rather, they should recognize the project as a motive power for economic development of Jeollabukdo.

• 산업경영시스템학회지
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• 제45권4호
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• pp.21-30
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• 2022

To mitigate the environmental impacts of the energy sector, the government of South Korea has made a continuous effort to facilitate the development and commercialization of renewable energy. As a result, the efficiency of renewable energy plants is not a consideration in the potential site selection process. To contribute to the overall sustainability of this increasingly important sector, this study utilizes the Black-Scholes model to evaluate the economic value of potential sites for off-site wind farms, while analyzing the environmental mitigation of these potential sites in terms of carbon emission reduction. In order to incorporate the importance of flexibility and uncertainty factors in the evaluation process, this study has developed a site evaluation model focused on system dynamics and real option approaches that compares the expected revenue and expected cost during the life cycle of off-site wind farm sites. Using sensitivity analysis, this study further investigates two uncertainty factors (namely, investment cost and wind energy production) on the economic value and carbon emission reduction of potential wind farm locations.

• 대한토목학회논문집
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• 제30권6D호
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• pp.615-622
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• 2010

최근 국내외적으로 친환경건설을 위해 환경성 및 경제성을 고려하여 통합평가하는 것은 일반화되어 가고 있다. 본 연구의 목적은 VE/LCC와 LCA를 통합분석하기 위한 시스템을 제시하는 것이다. 의사결정자가 환경성 및 경제성을 통합평가하고 이것을 의사결정에 반영하기 위해서는 현실적으로 매우 많은 비용자료, 설계도서 및 문서들을 적절히 관리하고 통합할 수 있어야 한다. 본 연구에서는 이러한 정보의 통합수단으로 WBS를 기본으로 한 관리수단을 제시하고, DB와 효율적으로 연계하여 의사결정을 할 수 있도록 하였다. 또한 본 시스템은 VE분석, LCC분석, LCA분석을 위한 모듈을 별개로 제시하여 사용자의 편의성을 좋게 하였다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2007년도 동계학술발표대회 논문집
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• pp.316-321
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• 2007

It is difficult for a superintendent or an operator of building service systems and equipment to decide the reasonable time for management of himself due to the shortage of his specialty for repair or replacement of a part of or whole equipment. But The reliable life expectancies for various building service equipment have not been prepared yet. This study shows the difference of optimal economic life and the decrease of running cost and energy consumption according to management level of the building equipment by the LCC analysis. The numerical model for building HVAC system was composed and analyses were performed for several parameters with management.

• 지질공학
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• 제25권4호
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• pp.599-612
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• 2015

신재생에너지는 지금까지 화석연료의 잔량과 환경적인 면에서 그 중요성이 부각되었지만, 경제성에 대한 요구도 점차 커져가고 있다. 특히, 지열 냉난방시스템은 초기 투자비가 큰 점이 단점으로 부각되어 경제성 분석을 통한 결과 제시가 더욱 중요해지고 있다. 따라서 본 연구에서는 지열 냉난방시스템의 경제성과 이산화탄소 발생량을 경유보일러, 도시가스 보일러, 수직밀폐형 및 SCW형의 4가지 방식으로 비교하여 분석을 수행하였다. 생애주기비용분석 결과, 지열 냉난방시스템의 경제성이 높게 나타났으며, 이중 SCW형 지열 냉난방시스템을 이용하는 경우 절감액이 가장 높은 것으로 분석되었다. 또한 이산화탄소 발생량 분석 결과, SCW형 지열 냉난방시스템을 적용할 때 저감량이 가장 크게 나타났다. 따라서 본 연구결과에서 제시된 분석 결과를 대규모 시설농업단지나 간척지에 적용 시 많은 비용을 절감할 수 있을 것으로 판단된다.

• 한국태양에너지학회 논문집
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• 제29권1호
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• pp.24-31
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• 2009

The aim of this study is to develop a software tool of thermal performance and economic analysis of windows, called WEPTools which helps architects, builders, and engineers quickly identify the most cost-effective window system in the very early stages of the design process. This software is suitable for examining middle or Large-sized commercial and residential buildings that are characterized by one thermal zone. To establish the reliability of the simulation results, we adopt TRNSYS algorithm of which verification has already well approved. Therefore it performs whole-building energy analysis for 8760 hours/year, including dynamic thermal calculation.