• 한국수소및신에너지학회논문집
• /
• 제28권6호
• /
• pp.675-682
• /
• 2017

New government, the market for stationary fuel cell systems in domestic is expected to expand in line with the policy for expanding new and renewable energy. In order to promote and expand the domestic market for stationary fuel cell systems, it is required to do research and develop for cost reduction and efficiency improvement technologies through the localization of BOP. In this study, the safety performance including the power consumption, flow rate, noise and air-tightness of the domestic fuel booster blower and the foreign fuel booster blower was evaluated and the performance improvement of the domestic blower was confirmed. As a result of the power consumption measurement and the flow rate according to the back pressure of the A company 2nd prototype and B company, the values were 73 W, 27 LPM, and 55 W, 25 LPM. These results are attributed to the improvement of performance through design changes such as CAM angle and diaphragm material.

• 디지털융복합연구
• /
• 제15권9호
• /
• pp.231-239
• /
• 2017

산업의 급격한 발전은 화석에너지의 고갈을 야기하였고, 이러한 이유로 화석연료를 대체하기 위한 에너지로 태양광에너지가 각광받기 시작하였다. 하지만 기술발전에 있어 전체적인 연구방향 및 향후 연구 방향에 대한 논의가 부족하였다. 이에 보다 효과적인 기술개발을 위해 특허 데이터와 논문 데이터를 활용하여 태양광 에너지의 기술 동향을 파악하고 논의를 진행하였다. 분석방법으로는 토픽 모델링과 텍스트 마이닝을 활용하여 1997년도부터 2015년까지의 데이터를 토대로 기술 동향과 연구의 방향성에 대하여 분석한다. LDA알고리즘을 통하여 토픽을 선정하고, 선정된 기술 범주에 포함된 키워드의 증가량을 살펴보고, 태양광 기술의 발전방향에 대하여 분석하였다. 태양광 발전 기술에 대한 연구는 꾸준히 진행될 것으로 예상되며, 특히 고효율화 및 고성능화 기술에 대하여 집중적으로 연구가 이루어질 것으로 분석된다. 향후 연구로는 해외의 특허데이터와 다양한 논문데이터를 추가하여 연구를 진행할 수 있을 것이다.

• 디지털융복합연구
• /
• 제12권3호
• /
• pp.243-248
• /
• 2014

최근 태양광에너지는 실시간 태양의 위치를 추적하여 모듈경사각과 이루는 갓을 산정하여 일사량을 보정하는 부분에서 컴퓨팅과의 결합이 확대되고 있다. 태양광 발전은 태양의 위치에 따라 출력변동이 심하고 출력 예측이 어려워 효율적인 전력 생산을 위해서 신재생에너지를 전력계통에 안정적으로 연계할 수 있는 기술이 필요하다. 본 논문에서는 실증단지 내 발전단지의 실시간 기상자료 예측값을 이용하여 최종적으로 태양광 발전량 예측값을 산정하는 태양광 발전을 위한 발전량 예측 모델을 분석한다. 태양광 발전량은 태양광 발전기별 모듈특성, 온도 등을 감안하여 보정계수를 입력하고 예측 지역의 위치 경사각을 분석하여 발전량 예측 계산 알고리즘을 통해 최종 발전량을 예측한다. 또한, 제안 모델에서는 실시간 기상청 관측자료와 실시간 중기 예측 자료를 입력 자료로 사용하여 단기 예측 모델을 수행한다.

• 한국태양에너지학회 논문집
• /
• 제30권6호
• /
• pp.28-33
• /
• 2010

Solar collectors to be applied are mainly flat-plate or vacuum tube collector which is used for hot water supply of house because of low heat value and low temperature. There are a necessity to expand applicable scope of solar collector into the industrial process heat source and air conditioner for coping with renewable energy policy of government and industrial trend. This study is to analysis the performance of PTC solar collector of concentrating type and flat-plate of non-concentrating. For this, temperature difference and heating value as insolation of air outside is measured from these two collectors mounted on 2-axial solar tracking system. It is investigated that temperature profile obtained from PTC solar collector is uniform and collecting heat per unit area is 6.8kcal/$m^2$ min which is about 3 times with compare to flat-plate collector of 2kcal/$m^2$min. Also the amount of heat to be produced from PTC solar collector is 3 Mcal/$m^2$ which is about 2 times with compare to flat-plate collector of 1.5Mcal/$m^2$ as a result of operating these two collectors during one month. Therefore, it is obtained that heat collecting performance of PTC solar collector is superior to flat-plate.

• 한국산학기술학회논문지
• /
• 제16권5호
• /
• pp.3391-3398
• /
• 2015

현재 대부분의 도서지역에서는 태양광발전을 효율적으로 운용하기 위하여 대용량 연축전지가 많이 사용되고 있지만, 풍력발전의 도입, 축전지 교체로 인하여 리튬이온전지의 도입이 증가하고 있다. 따라서 본 논문에서는 기존에 많이 보급되어 사용되고 있는 연축전지와 리튬이온전지의 장점을 최대한 활용하기 위하여, 연축전지와 리튬이온전지용 하이브리드 BMS 알고리즘을 제시하였다. 즉, 각 전지의 충전상태(state of charge, SOC)를 평가하는 알고리즘과 각 전지의 도입비용과 운용비용에 따른 최적 구성비를 산출하는 하이브리드 운용 알고리즘을 제안하였다. 상기의 알고리즘을 이용하여 다양한 시뮬레이션을 수행한 결과, 기존의 충전상태 평가 방법보다 오차율이 개선되어 정확한 충전상태에 대한 결과가 산출되었고, 각 전지의 도입비용과 운용비용이 최소화되는 조건에서 최적구성비를 구하여, 본 논문에서 제안한 하이브리드 BMS 알고리즘의 유용성을 확인하였다.

• 한국기후변화학회지
• /
• 제9권2호
• /
• pp.197-207
• /
• 2018

The Korean government views coal-fired power plants as the key cause of the fine dust generation, and is developing an energy policy to replace and demolish old coal-fired power plants. According to the Eighth Power Supply Base Plan (2017-2031), the maximum power capacity in 2030 is expected to be 100.5GW, which is 17.9% higher than the current level (85.2GW). The plan aims to reduce the facility size and power generation ratio from nuclear and coal resources to even lower levels than today, and to rapidly expand power generation from new and renewable energy. Despite that, the proportion of coal power generation is still much higher than other resources, and it is expected that the reliance on goal will maintain for next several decades. Under such circumstances, the development, supply, and expansion of clean coal technology (CCT) that is eco-friendly and highly efficient, is crucial to minimize the emission of pollutants such as carbon dioxide and fine dust, as well as maximize the energy efficiency. The Korean government designated the Yong-Dong Thermoelectric Power Plant in Gangneung to develop clean coal power generation, and executed related projects for three years. The current study aims to suggest a plan to develop parts, technologies, testing, evaluation, certification, and commercialization efforts for coal-fired power generation, In addition, the study proposes a strategy to vitalize local economy and connect the development with creation of more jobs.

• 한국정보통신학회논문지
• /
• 제19권3호
• /
• pp.596-606
• /
• 2015

최근 정부가 추진하고 있는 신재생에너지 보급 및 확대 정책으로 스마트그리드의 핵심인 ESS에 관한 투자 및 연구가 선진국을 중심으로 빠르게 확산되고 있다. 미국을 비롯한 유럽 선진국들은 다양한 ESS관련 제도정비 및 개선을 통해 ESS 산업의 활성화를 유도하고 있는 반면, 우리나라의 경우, ESS 도입 및 활성화를 위한 법제도적 기반이 마련되어 있지 않다. 또한, ESS도입에 대한 경제적 효과성에 대한 객관적인 기준이 없어, ESS의 보급 및 활성화가 제대로 이루어지지 않고 있다. 이에 본 연구에서는, ESS의 보급과 활성화를 위해 한국의 전기요금 체계를 기반으로 ESS의 경제성을 효과적으로 분석하기 위한 기법을 제시한다. 이를 위해 ESS의 운영 모형을 정의하고 각 운영 모형별 분석기법을 비교하여 최적의 경제성 분석방법을 제시한다.

• 한국지하수토양환경학회지:지하수토양환경
• /
• 제22권5호
• /
• pp.112-127
• /
• 2017

Groundwater accounts for more than 10% of the total water supply in Korea. However, the contribution of groundwater to public water supply systems has been poorly played role throughout the country except for Jeju Island. Compared with the groundwater uses in foreign countries, the pattern of groundwater use in Korea seems to be very deformed and unreasonable. Currently, the development and use of groundwater in Korea are mostly carried out by the individuals, and public sectors such as central and local governments are not actively involved in such activities. Private groundwater use and management will continue to cause groundwater depletion and pollution problems. It is necessary to actively enhance the role of public authorities in groundwater managements by engaging precise hydrogeological surveys and proper economic evaluation in the development and operation of groundwater sources. Also, in order to solve the problems that public water supply systems overly rely on the surface water sources, it is necessary to take policies that require the water supply companies to secure a variety of water sources.

• 한국신재생에너지학회:학술대회논문집
• /
• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
• /
• pp.460-462
• /
• 2009

This study has analyzed the scale, location, resource potential and feasibility of offshore wind farm scientifically and systematically based on the national wind map and GIS (Geographic Information System). For long-term wind power development, this study pursues siting strategy building, selection of target area and deciding development priority as well as the presenting a basis for assessment that are necessary for policy decision making by making theme layers under GIS environment. According to the analysis after organizing technological development by stages, even if only the most suitable sites are developed among the area of offshore wind farm candidates that can be developed under the current technological standard, it has been evaluated as being able to develop about 3 times of the wind power dissemination target until 2012. It is expected that about 5% of territorial water area can be developed in a short-term future while the southern offshore area possessing relatively favorable wind resource than the western offshore has been identified as the most feasible site. While about 23% of territorial water area has been classified as potential area for offshore wind farm development in a long-term future, even Jeju Island and offshore of Ulsan possessing excellent wind resource have been analyzed as feasible sites. The feasibility assessment of offshore wind farm development established by this study is expected to assist national strategy building for accomplishing the wind power dissemination target.

• The Journal of Asian Finance, Economics and Business
• /
• 제8권1호
• /
• pp.723-732
• /
• 2021

On September 25, 2015, 193 countries of the United Nations (UN) General Assembly, signed the 2030 Agenda to work towards attaining 17 Sustainable Development Goals (SDGs) and its associated 169 targets and 232 indicators. With one of the largest renewable energy programs, India is well-poised to be a role model for low-carbon transformation to other Asian countries. However, bridging the financing gap is critical to ensure that the country meets its SDG targets. Though the SDGs identified by the UN are broad-based and interdependent, for ease of analysis we have grouped them into five themes - people, planet, prosperity, peace, and partnership - based on existing UN models. This paper investigates the financing gap for 'green' projects linked to planet-related SDG targets in India. It builds an argument for utilizing green bonds as an instrument to bridge the gap. After establishing the potential of green bonds in raising the finance to meet India's planet-related SDG targets, we look at the current policy landscape and suggest recommendations for successful execution. The paper concludes that deepening of the corporate fixed income securities market and firming up guidelines in line with India's climate action plans are inevitable before green bonds can be considered a viable financing option.