해양심층수 에너지자원 이용 타당성 분석 연구

오위영,김정협,김현주 한국기술혁신학회 2010 한국기술혁신학회 학술대회 발표논문집 Vol.2010 No.5

UR이 기계산업에 미칠 영향과 대응방안

오위영,김정흠,O, Wi-Yeong,Kim, Jeong-Heum 재료연구소 1994 機械와 材料 Vol.6 No.2

MTRM 작성현황과 향후 추진 방안

오위영,강길모 한국해양환경·에너지학회 2005 한국해양환경공학회 학술대회논문집 Vol.2005 No.11

연구개발 방향 정립을 위한 1MW급 OTEC 플랜트 경제성 분석 연구

오위영(Wee-Yeong Oh),김현주(Hyeon-Ju Kim),김형국(Hyeong-Guk Kim) 한국해양환경·에너지학회 2015 한국해양환경공학회 학술대회논문집 Vol.2015 No.11

신재생에너지의 하나인 해수열에너지의 자원화 기술은 해수자원의 다각적 이용을 위한 핵심기술로서 자원 확보와 환경개선을 위해 국내외에서 새롭게 주목을 받고 있으며, 기술선점을 위한 기술개발 경쟁이 갈수록 치열해지고 있다. 본문에서는 1MW 해수온도차발전 개념설계 결과를 바탕으로 경제적 타당성을 분석하였는데, 그 결과는 다음과 같다. 첫째, 1MW급 온도차발전 플랜트에서 해양심층수 및 표층수를 이용하여 전기를 생산할 경우 현재 국내 전기료 수준에서는 경제성이 미흡한 것으로 분석된다. 둘째, 해수온도차발전의 적지로 평가되고 있는 태평양 도서국에서는 전기의 보급률이 낮고, 전기료도 높은 수준이기 때문에 현재의 생산단가로도 충분한 경제성을 갖출 수 있다. 셋째, 현재의 국내 전기료 수준에서는 경제성이 부족하나 연구개발을 통해 50MW급 이상의 온도차발전 플랜트 상용화에 성공한다면, 탄소배출권 등을 종합적으로 고려할 때 경제성이 확보될 수 있을 것으로 판단된다. 특히, 해수온도차발전은 해수 담수화, 농수산 이용, 해저자원 개발 등과 연계하여 다목적으로 이용하면, 경제적 파급효과는 더욱 커질 것으로 판단되므로, 조기 실용화 및 보급 확산을 위한 연구개발을 신속히 추진할 필요가 있다. Annual power consumption of our country is positioned in the upper percentile in the world, and because the proportion of fossil power generation is high, which ranks the 7th CO₂ emission country. In this regard, government has established and is implementing the National Energy Basic Plan to realize to get out of fossilization in energy supply while focusing on securing the technology for renewable energy as well as its commercialization in order to reduce greenhouse gas. Resource recovery technology for deep seawater thermal energy which is one of renewable energies is newly getting attention domestically as well as in overseas for securing resources and environmental improvement as a core technology for multilateral use of marine resources for low carbon and green growth. Economic feasibility analysis was conducted for the research and development as follows on the use of ocean thermal energy conversion(OTEC). First, in the case of power generation using deep seawater and warm discharge water from OTEC plant of 1MW level, it is judged that the economic feasibility is insufficient but the feasibility will be significantly improved if we consider not only power generation but also certified emission reduction by developing the power plant to the size for commercialization. Second, the economic feasibility for the use of deep seawater as OTEC plant of 50MW level turned out to be very good. Especially, when we consider certified emission reduction, it will be possible to secure sufficient economic feasibility. When we use it in connection with OTEC, agricultural and fishery use, it is judged that economic ripple effect will be significant and therefore it will be necessary to conduct research and development for early commercialization, distribution and diffusion of deep seawater energy.

인공갯벌 조성에 관한 경제적 타당성 분석

남광현,오위영 한국해양과학기술원 2003 Ocean and Polar Research Vol.25 No.3s

The purpose of this paper is to investigate economic feasibility of creating artificial tidal flats using cost-benefit analyses. We assumed that the cost factors are associated with designing, construction and monitoring, and the benefit factors are associated with fisheries production, habitation, prevention of disasters, water purification, aesthetic value and existence value. First, for analyzing economic feasibility, the scenario suggests that a design can be made in a year, construction can be completed in three years and monitoring must be made for 20 years. Assuming the discount rate of 7.5%, economic feasibility analyses showed that B/C was 2.26 and IRR was 14.50. This study indicated there is economic validity of implementing creation of artificial tidal flat. In addition, we carried out a sensitivity analysis at the change of discount rate and restoration rate. The result of sensitivity analysis clearly showed that economic validity is low when discount rate is over 15%, and changes in restoration rate did not significantly effect on the economic validity.

CO₂ 해양격리시스템의 기술.경제적 가능성평가

박세헌,오위영,권문상,Park, Se-Hun,Oh, Wee-Yeong,Kwon, Moon-Sang 한국해양과학기술원 2005 Ocean and Polar Research Vol.27 No.4

The $CO_2$ storage in geologic and oceanic reservoirs is considered to be one of the carbon management strategies for responding to global climate change. Ocean carbon sequestration is purposeful storage acceleration into the ocean of large amounts of carbon that would accumulate in the atmosphere and naturally enter the ocean over a longer timespan. Some technologies for $CO_2$ ocean sequestrations have been developed as a nation project. However, $CO_2$ ocean sequestrations are attractive because they have the advantage of vast capacity sequestration far away from industrial areas, and offer easier monitoring whereas less economic advantage has been indicated as one of the key barriers compared with $CO_2$ geosphere sequestration, which is produced as a byproduct. In this paper, a conceptual design for $CO_2$ ocean sequestration is introduced, and the preliminary examination is described. As a result, the $CO_2$ price, US$ 24/t shows far away from the economics. The causes come from the expensive $CO_2$ recovery cost and the low $CO_2$ price. The expensive $CO_2$ recovery cost is because too much electricity and water are consumed. In order to look for an economic balance point for $CO_2$ ocean sequestration, NPV=0, it is increases the $CO_2$ price. Finally 60.4$ per ton is found to be the balance price.

인공갯벌 조성에 관한 경제적 타당성 분석

남광현,오위영,Nam, Kwang-Hyun,Oh, Wee-Yeong 한국해양과학기술원 2003 Ocean and Polar Research Vol.25 No.4

The purpose of this paper is to investigate economic feasibility of creating artificial tidal flats using cost-benefit analyses. We assumed that the cost factors are associated with designing, construction and monitoring, and the benefit factors are associated with fisheries production, habitation, prevention of disasters, water purification, aesthetic value and existence value. First, for analyzing economic feasibility, the scenario suggests that a design can be made in a year, construction can be completed in three years and monitoring must be made for 20 years. Assuming the discount rate of 7.5%, economic feasibility analyses showed that B/C was 2.26 and IRR was 14.50. This study indicated there is economic validity of implementing creation of artificial tidal flat. In addition, we carried out a sensitivity analysis at the change of discount rate and restoration rate. The result of sensitivity analysis clearly showed that economic validity is low when discount rate is over 15%, and changes in restoration rate did not significantly effect on the economic validity.

해양과학기술(MT)의 현안과 활성화 방안 연구

강길모,오위영,권문상,박세헌,Kang Gil-Mo,OH Wee-Yeong,Kwon Moon-Sang,Park Se-Hun 해양환경안전학회 2006 해양환경안전학회지 Vol.12 No.1

해양은 인류가 앞으로 풀어야 할 숙명적인 문제인 식량문제, 자원문제, 환경문제를 해결할 수 있는 마지막 보루이다. 이러한 점을 감안하여 국내 산 학 연 전문가가 참여하여 추진한 $\ulcorner$해앙과학기술(MT) 개발 계획$\lrcorner$ 이 2004년 7월 28일 대통령을 위원장으로 하는 국가과학기술위원회 심의에 통과됨으로써 우리나라에서도 본격적으로 MT 개발을 추진할 기반을 마련하게 되었다. 또한, 2005년 6월부터 $\ulcorner$MT개발기획$\lrcorner$을 효율적으로 추진하기 위한 후속조치로 해양과학기술 로드맵(MTRM) 수립을 추진하여 2005년 12월에 완료하였다. 본 연구에서는 MT의 국내외 기술개발동향과 현재 직면한 현안문제 및 MTRM수립 결과를 고찰하고, MT R&D 전문기관 설치 운영 및 예산확보 등 MT 활성화 방안을 제시하였다. Marine Technology is the last hope of mankind for resolving predestined issues of food, resources, and environmental problems. facing and realizing this great challenge, domestic industrial, academic and research institutional experts participated in formulating the Marine Technology development plan, and the national science and technology committee chaired by the president passed this important plan thus setting the foundation for activating and promoting MT development. A project to develop Marine Technology Road Map(MTRM) has been carried out since June of 2005 for effective execution of the plan 1his paper reviewed current issues of MT and contents of MTRM, and proposed alternative measures for MT activation and promotion such as the establishment of special institutes for managing MT research and development and the fund raising for MT budget.

심해저 망간단괴 개발사업의 경제적 타당성 재평가

남광현,권석재,오위영 한국해양과학기술원 2004 Ocean and Polar Research Vol.26 No.2

The purpose of this paper is to investigate economic feasibility of manganese nodules in the area obtained by Korea (Clarion-Clipperton Fracture Zone). We assumed that the production scale of manganese nodules were 3.0 MT (million ton(dry)) or 1.5 MT, and estimated the capital costs and operating costs by sectors such as exploration, mining, transportation, and metallurgical process. The capital cost and operating cost evaluation reflects the latest technical practices. First, for analyzing economic feasibility, the scenario suggests that the production of 4 metals can be made for 25 years. It is assumed that the discount rate, equity capital, and tax rate are each 8.0%, 50%, and 27%. 3.0 MT of manganese nodule were mined, economic feasibility analyses showed that IRR was 12.8 and pay-back period was 9.2 years, and when 1.5 MT of manganese nodule were mined, economic feasibility analyses showed that IRR was 4.0 and pay-back period was 11.8 years. This study shows that there exists economic feasibility when 3.0 MT of manganese are produced. In addition, we carried out a sensitivity analysis at the change of cobalt price on mining 1.5 MT. The result of sensitivity analysis shows that economic feasibility goes up as increase of cobalt price (50% up).

CO2 해양격리시스템의 기술·경제적 가능성평가

박세헌,권문상,오위영 한국해양과학기술원 2005 Ocean and Polar Research Vol.27 No.4

The CO2 storage in geologic and oceanic reservoirs is considered to be one of the carbon management strategies for responding to global climate change. Ocean carbon sequestration is purposeful storage acceleration into the ocean of large amounts of carbon that would accumulate in the atmosphere and naturally enter the ocean over a longer timespan. Some technologies for CO2 ocean sequestrations have been developed as a nation project. However, CO2 ocean sequestrations are attractive because they have the advantage of vast capacity sequestration far away from industrial areas, and offer easier monitoring whereas less economic advantage has been indicated as one of the key barriers compared with CO2 geosphere sequestration, which is produced as a byproduct. In this paper, a conceptual design for CO2 ocean sequestration is introduced, and the preliminary examination is described. As a result, the CO2 price, US$ 24/t shows far away from the economics. The causes come from the expensive CO2 recovery cost and the low CO2 price. The expensive CO2 recovery cost is because too much electricity and water are consumed. In order to look for an economic balance point for CO2 ocean sequestration, NPV=0, it is increases the CO2 price. Finally 60.4$ per ton is found to be the balance price.