• 자원ㆍ환경경제연구
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• 제15권2호
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• pp.269-296
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• 2006

본 연구는 신 재생전원설비가 전력공급설비로서의 역할을 키워감에 따라 나타날 수 있는 공급상의 문제를 신 재생에너지원별로 확률적인 분석을 통하여 제기하였다. 각 원별 패턴은 풍속, 일사량, 그리고 월력에 근거한 조수간만의 차이 등에 의해 영향을 받으며 이들은 확률적 분포를 갖는다는 점에 주목하여 피크공급에 대한 각 원별 기여도에 대한 확률적 분석을 시도하였다. 분석의 결과, 통상적인 전력수급계획에서 각 에너지원별 혹 발전원별 설비이용률만을 고려하여 설비계획에 반영하는 기존의 방법론이 갖는 한계를 보여준다.

• 대한공간정보학회지
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• 제22권4호
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• pp.13-19
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• 2014

한반도와 같은 산악지형에서 풍력단지를 조성할 경우, 인근 지형에 의한 차폐영향이 없기 때문에 상대적으로 풍력자원이 우수한 능선을 따라서 풍력터빈을 설치하는 것이 유리하다. 본 연구에서는 산악지형에서의 풍력단지 입지평가를 위하여 SRTM v4.1 3 arc-second 해상도의 수치고도 데이터베이스와 지형형태 분류 프로그램인 LandSerf v2.3을 이용하여 풍력터빈 설치 가능한 능선을 추출하였으며, 강원도에 건설된 강원풍력단지, 태기산풍력단지 및 매봉산풍력단지의 사례분석을 통하여 대부분의 풍력터빈이 상대적으로 풍력자원이 우수한 능선을 따라 배치되었음을 확인함으로써 이 방법의 유효성을 검증하였다.

• 한국컴퓨터산업학회논문지
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• 제5권9호
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• pp.1031-1042
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• 2004

대체에너지원 데이터는 측정값이 시시각각으로 변경되는 특성을 갖기 때문에 시간의 변화에 따라 발생되는 원시 데이터의 양이 상당히 방대하다. 따라서 대체에너지원 데이터의 이력 정보를 체계적으로 저장 및 관리할 수 있는 이력 데이터베이스의 구축과 대체에너지원 예측 시스템에 대한 연구가 필요하다. 이 논문에서는 대체에너지원 데이터의 과거 측정값에 대한 추정 기능의 지원을 통해 시시각각으로 변화하는 데이터를 체계적으로 관리하기 위한 대체에너지원 추정 기법을 제안하였다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2013년도 춘계학술발표대회
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• pp.1044-1045
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• 2013

신재생에너지자원 사용의 확대와 더불어 그 안전성에도 관심이 고조되고 있다. 이에 따라 신재생에너지의 개발과 보급을 위한 데이터를 축적하고 관리, 활용할 수 있는 체계가 필요하다. 본 연구에서는 신재생에너지자원을 보다 효율적으로 활용하기 위한 WebGIS 기반의 시스템을 개발한다. 공간 데이터의 관리, 공간정보 서비스 인프라를 구축하기 위해서 기 구축된 시스템에 OGC의 표준을 적용하고, 평가를 위한 공간정보를 연계하여 신재생에너지자원의 개발 및 보급을 위한 경제성평가 모듈의 신뢰성을 향상시켰다. 이를 통해 신재생에너지 자원평가, 최적지 선정 및 잠재량 등에 대한 정밀한 분석 및 평가가 가능하며, Web기반의 시스템 개발을 통해 신재생에너지 정보의 활용성 증대, 신재생에너지에 대한 인식제고를 위한 도구로써 활용될 수 있다.

• 한국태양에너지학회 논문집
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• 제32권5호
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• pp.94-101
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• 2012

A Dokdo wind resource map has been drawn up for the Green Island Energy Master Plan according to Korea's national vision for 'Low Carbon Green Growth'. The micro-siting software WindSim v5.1,which is based on Computational Flow Analysis, is used with MERRA reanalysis data as synoptic climatology input data, and sensitivity analysis on turbulence model is accompanied. A wind resource assessment has been conducted for the Dokdo wind power dissemination plan, which consists of two 10kW wind turbines to be installed at the Dongdo dock and Dokdo guard building. It is evaluated that the capacity factors at Dongdo dock and Dokdo guard building are about 20% and 30% respectively, and annual and hourly variations of wind power generation have been analyzed, but summertime energy production is predicted to be only 40% of wintertime energy production.

• 한국태양에너지학회 논문집
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• 제39권2호
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• pp.71-80
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• 2019

Daily ahead forecast is necessary for the electricity balance between load and supply due to the variability renewable energy. Numerical weather prediction is usually employed to produce the solar irradiance as well as electric power forecast for more than 12 hours forecast horizon. UM-LDAPS model is the numerical weather prediction operated by Korea Meteorological Administration and it generates the 36 hours forecast of hourly total irradiance 4 times a day. This study attempts to evaluate the model performance against the in situ measurements at 37 ground stations from January to May, 2013. Relative mean bias error, mean absolute error and root mean square error of hourly total irradiance are averaged over all ground stations as being 8.2%, 21.2% and 29.6%, respectively. The behavior of mean bias error appears to be different; positively largest in Chupoongnyeong station but negatively largest in Daegu station. The distinct contrast might be attributed to the limitation of microphysics parameterization for thick and thin clouds in the model.

• 신재생에너지
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• 제20권1호
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• pp.88-94
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• 2024

This study explored the potential and implementation of renewable energy sources in Sri Lanka, focusing on the theoretical potential of solar and wind energy to develop self-reliant energy models. Using advanced climate data from the European Centre for Medium-Range Weather Forecasts and Global Solar/Wind Atlas provided by the World Bank, we assessed the renewable energy potential across Sri Lanka. This study proposes off-grid and minigrid systems as viable solutions for addressing energy poverty in rural regions. Rural villages were classified based on solar and wind resources, via which we proposed four distinct energy self-reliance models: Renewable-Dominant, Solar-Dominant, Wind-Dominant, and Diesel-Dominant. This study evaluates the economic viability of these models considering Sri Lanka's current energy market and technological environment. The outcomes highlight the necessity for employing diversified energy strategies to enhance the efficiency of the national power supply system and maximize the utilization of renewable resources, contributing to Sri Lanka's sustainable development and energy security.

• 한국태양에너지학회 논문집
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• 제39권3호
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• pp.47-57
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• 2019

Clear sky indices were estimated by various ways based on in-situ observation and satellite-derived solar irradiance. In principle, clear sky index defined by clear sky solar irradiance indicates the impacts of cloud on the incoming solar irradiance. However, clear sky index widely used in energy sciences is formulated by extraterrestrial irradiance, which implies the extinction of solar irradiance due to mainly aerosol, water vapor and clouds drops. This study examined the relative difference of clear sky indices and then major characteristics of clear sky irradiance when sky is clear are investigated. Clear sky is defined when clear sky index based on clear sky irradiance is higher than 0.9. In contrast, clear sky index defined by extraterrestrial irradiance is distributed between 0.4 and 0.8. When aerosol optical depth and air mass coefficient are relative larger, solar irradiance is lower due to enhanced extinction, which leads to the lower value of clear sky index defined by extraterrestrial irradiance.

• 국제초고층학회논문집
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• 제7권2호
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• pp.161-170
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• 2018

Rapid urbanization, resource depletion, and limited land are further increasing the need for skyscrapers in city centers; therefore, it is imperative to enhance tall building performance efficiency and energy-generative capability. Potential performance improvements can be explored using parametric multi-objective optimization, aided by evaluation tools, such as computational fluid dynamics and energy analysis software, to visualize and explore skyscrapers' multi-resource, multi-system generative potential. An optimization-centered, software-based design platform can potentially enable the simultaneous exploration of multiple strategies for the decreased consumption and large-scale production of multiple resources. Resource Generative Skyscrapers (RGS) are proposed as a possible solution to further explore and optimize the generative potentials of skyscrapers. RGS can be optimized with waste-energy-harvesting capabilities by capitalizing on passive features of integrated renewable systems. This paper describes various resource-generation technologies suitable for a synergetic integration within the RGS typology, and the software tools that can facilitate exploration of their optimal use.

• 한국태양에너지학회 논문집
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• 제32권6호
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• pp.68-75
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• 2012

Small hydropower is one of the many types of new and renewable energy, which is planning to develop, as the country is abundant in endowed resources. In order to fully utilize small hydropower resources, there is a need for greater precision in quantifying small hydropower resources and establish an environment in which energy sources can be discovered using the small hydropower resource management system. This study has given greater precision to calculate annual electricity generation and capacity of small hydropower plants of Nakdong river system by inquiring into average annual rainfall, basin area and runoff coefficient, which is anticipated to promote small hydropower resources utilization. Small hydropower resource management system was also established by additionally providing base information on quantified small hydropower resources and analysis function and small hydropower generator status, rivers, basin, rainfall gauging station, water level gauging station etc.. Small hydropower resource management system can be used gather basic information for positive applications of small hydropower energy nationwide.