• 한국태양에너지학회 논문집
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• 제29권6호
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• pp.14-21
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• 2009

The demand and installation for photovoltaic system(namely, PV) has grown steadily in Korea. However, the PV system has a various economic viability according to the PV system characteristic variables such as inverter efficiency, miscellaneous power conditioning losses, azimuth and slope of PV array, PV tracking mode, and so on. The other variables are the monthly consumed electric energy and economic related factor such as initial cost, government subsidy, maintenance cost, inflation rate, energy cost escalation rate, discount rate, etc. Therefore, this study is to present economic evaluation of PV system with those concerned factors by calculating internal rate of return, year-to-positive cash flow and net present value indices.

• 전기학회논문지
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• 제64권1호
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• pp.29-34
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• 2015

This paper presents a method to select optimal device for mitigating voltage sags. The method is based on economic evaluation and voltage sag assessment involving sag duration as well as magnitude. The economic evaluation is performed by using the operation cost and economic benefit of the mitigation devices. The optimal device can be determined from the values of NPV (net present value) which is widely accepted in cost-benefit analysis. The proposed method can help sensitive customers to select optimal mitigation device. In this paper, the case study considering two sensitive customers was performed by using the proposed method.

• 한국조경학회지
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• 제34권1호
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• pp.37-47
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• 2006

Environment-friendly agriculture has not only the simple purpose producing foods but also the key roles of conserving rural environments, landscapes and sustainable land uses. In addition, environment-friendly agricultural areas and their landscapes are important factors representing uniqueness of rural areas. For these reasons, this study investigates the landscapes formed through environment-friendly agriculture and evaluates the economic values of the landscapes using CRM(contingent ranking method) which has been known as one of the practical methods in the field of environmental economics. Based upon a scenario that government introduces the ratio of environment-friendly agriculture to evaluate economic values, a survey was performed with 1,088 of rural residents throughout the country. The results of this study indicate that the economic value for conservation and maintenance of environment-friendly agriculture landscapes is 480 won per household/month/1% environment-friendly agriculture, and this can be converted into 829 hundred million won per 1% environment-friendly agriculture nationally.

• Asian Journal of Innovation and Policy
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• 제12권3호
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• pp.277-303
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• 2023

The importance of ecosystem service such as green spaces has risen due to restrictions on outdoor activities amid the climate crisis and COVID-19. While gardens significantly impact economic development, quality of life, and social well-being, comprehensive studies on their multidimensional values are lacking. This research categorizes garden values into social, cultural, environmental, and health dimensions and proposes an integrated assessment framework that introduces detailed elements and evaluation methods. An empirical assessment of carbon storage index in two Korean gardens, Semiwon and Juknokwon, reveals Semiwon's higher carbon storage per unit area. The proposed framework, emphasizing a quantitative approach, enables cross-national and regional comparisons, contributing to a broader understanding and evaluation of garden values beyond specific facilities.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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• pp.751-753
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• 2005

In this raper, Economic value of reserve margin i.i presented by opportunity cost for Korean power system, and the level of compensation for spinning reserve that is necessary to operate power system stably is proposed. The generator that is giving up for opportunity to participate in energy market must take opportunity cost. it is relative to not only whole demand level but also marginal cost of each resource. In this paper, assume that all resource in Korea is equivalent to six generator for simulation. and we evaluate value of reserve in the time of high demand and low demand. Also we propose the way to improve a evaluation method by examine relationship between capacity payment and value of reserve.

• 한국수소및신에너지학회논문집
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• 제25권3호
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• pp.319-335
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• 2014

This study attempts to suggest an economic analysis model for SNG projects, which can reflect the future uncertainty objectively and applies the real option valuation incorporating the flexible investment decision. Based on this analysis model, net present value and internal rate of return were estimated by using preliminary feasibility study report of SNG project. And economic evaluation of SNG project was performed with real option valuation using binomial option model. Through this, the difference of analysis results between the real option valuation model and the discounted cash flow model were compared and the usefulness of the real option valuation model was confirmed. From the actual proof analysis, it is confirmed that the real option valuation model showed higher SNG project value than the discounted cash flow model did. It was confirmed that by applying the real option valuation model, economic analysis can be performed on not only the current straightforward SNG project, but also various future portfolios having options such as expansion, modification, or decommission.

• 한국항만경제학회지
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• 제26권2호
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• pp.58-81
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• 2010

항만 리모델링사업에 따른 주요 편익에는 선박재항비용 및 하역비용 절감효과, 시민들의 친수성 공간 이용편익 등이 있다. 리모델링은 대체항만 개발에 따른 막대한 기회비용을 피할 수 있으며, 항만 공간이 시민들의 휴식 공간이 됨으로써 많은 편익을 낳을 수 있다. 일본은 제도의 투명성, 유사 사업간 평가의 정합성, 그리고 평가수법의 고도화를 위해 끊임없이 노력하고 있다. 투자평가 시 사업주체의 의사결정에 도움이 되도록 사업에 따른 모든 효과와 비용은 가능한 한 화폐 환산이 가능하도록 한다. 한편 친수성 항만 공간 조성에 따른 항만 녹지, 광장, 위락시설, 수변시설 등의 이용자 편익은 여행비용법으로, 한편 해상안전, 수질 저질의 정화에 따른 편익은 가상가치법으로 각각 추계할 것을 권장하고 있다. 보다 나은 투자평가를 위해서는 평가의 객관성과 신뢰성을 높일 수 있도록 평가 시 최저한으로 준수하여야 할 가이드라인을 제시하도록 한다. 평가의 신뢰성을 제고하기 위해 평가 방법이나 기본 원단위의 개발에 힘쓰고, 평가 사례의 축적을 통하여 사례별 평가결과의 상호 비교를 가능하게 함으로써 유사 사업간 평가의 일관성을 높이도록 하여야 할 것이다.

• 대한산업공학회지
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• 제38권2호
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• pp.144-156
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• 2012

In recent years, advanced countries in energy sector are emphasizing the importance of the development and deployment of renewable energy to cope with the global environmental crisis such as depletion of fossil energy, climate convention to control emissions of greenhouse gases. In this paper, we evaluate the economic value of the investment in new and renewable energy R&D in Korea and optimal deployment timing of new and renewable energy by using the real option approach. The real option model adopted in this paper assumes that a decision maker has a compound option to abandon, deployment, or continue the R&D. As a result by using empirical data of Korea, it is found that there exists a considerable amount of positive real option value (ROV) in the investment of new and renewable energy R&D while its net present value (NPV) calculated by traditional discounted cash flow (DCF) model shows negative value.

• 동력기계공학회지
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• 제19권4호
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• pp.50-55
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• 2015

Recently, because of the deterioration of the nuclear generating station and increase of the cooler and heater, energy problem is increasing. To save the energy, the free cooling system is developed. The free cooling system is that cool the water to use cooled air in winter and is used in industrial process or data center. Yoon check the energy of free cooling system with dry cooler in korea. In this study, the value of the free cooling system with dry cooler is confirmed through using the NPV that is economic evaluation. when temperature degree of the cooled water is 10, in Chuncheon and Seoul the value is the most high. When temperature degree of the cooled water is 20, in Ulsan the value is the most high. As the result, because the using the temperature degree of the cooled water is high in the industrial process, the free cooling system is advantageous in korea.

• 한국통신학회논문지
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• 제31권1B호
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• pp.56-70
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• 2006

본 연구는 최근 IP 주소부족 문제와 더불어 새롭게 도입이 추진되고 있는 IPv6의 경제적 가치를 분석하고자 한다. 일반적으로 IPv6과 같은 플랫폼형태의 신기술은 직접적인 효과보다는 간접적인 효과로 나타나기 때문에 경제적 가치를 정확히 산정하는 것은 매우 불확실하고, 어려운 일이다. 따라서 본 연구에서는 IPv6의 경제적 가치를 정확하고, 엄밀하게 측정하기 보다는, 여러 관점에서 다양한 방법을 적용하여 탐색적인 분석을 시도 하였다. 이를 위해 관련 이해관계 당사자별 손익을 고려한 IPv6 경제적 가치 평가 모형을 개발하고, 국내 인터넷 시장자료와 전문가 예측자료와 같은 정성적 자료와 정량적 자료를 동시에 활용하여 경제적 가치를 산정하였다. 마지막으로, 경제적 가치 산정 결과의 정책적 시사점과 연구의 한계점을 제시하였다.