태양광발전시스템의 수상 및 육상 배치의 최적화를 위한 경제성 분석 연구

제종룡 경상대학교 융합과학기술대학원 2019 국내석사

The purpose of this study is to analyze the change of power generation by location condition of solar power generation, and to study the economical efficiency of land & water state power generation for optimal layout considering increase of power generation efficiency. The main contents of the study are comparing and analyzing the existing PV operation results in Korea, and predicted the efficiency increase of PV power by designing location condition. Assuming solar installation in a specific area, the system configuration was determined, and the power generation of the photovoltaic generation according to the location condition was predicted, and economic analysis and economic analysis of the layout of the solar panel were performed. It will contribute to the expansion of new and renewable energy by using it as basic data for economical analysis for future solar power generation business.

소형 풍력발전시스템에 대한 분산전원으로서의 가능성 분석에 관한 연구

김학균 경상국립대학교 융합과학기술대학원 2023 국내석사

This paper investigates the feasibility of utilizing small wind power generation systems as distributed power sources in apartment houses. Apartment houses, widely used in urban areas, have a significant electricity demand. Therefore, based on wind speed data from the Korea Meteorological Administration in the Gyeongsangnam-do, this study explores suitable apartment houses for implementing small wind power generation systems. This study examines the potential of small wind power systems as a distributed power source by assessing their generation capacity, taking into account the average wind speed from the rooftop of an apartment building and considering IEC regulations. The research findings demonstrate that small wind power generation systems can effectively supply power to apartment houses, making them viable as distributed power sources. By further advancing zero-energy building technologies and providing various incentives, it is possible to expand the adoption of these systems, enabling stable and sustainable power supply while reducing energy costs and minimizing environmental impact.

드론 영상의 입체 텍스처 기법을 활용한 VR 기반 점검이력 관리시스템 개발에 관한 연구 : 풍력터빈을 중심으로 한 점검이력 관리시스템 개발에 관한 연구

한인수 경상국립대학교 융합과학기술대학원 2021 국내석사

This paper is to study the technology of inspection and history management systems for wind power that are continuously increasing around the world. In the past, inspections and analysis of major devices in renewable energy system have been operated in an analog way that identifies problems through photography and passive method. To improve this problem, we conduct a study on VR-based inspection history management system using 3D texturing technique of drone image. The paper describes the current status and prospects of wind power, research and development of wind power blade inspection and history management systems, experiments and reviews in the field, and expected effects and future utilization of this technology. In the future, it is expected that the latest technology for inspection and management of renewable system will be secured and introduced to the site through the development research of this system to reduce maintenance costs and power generation costs.

營農形太陽光 普及에 관한 硏究

김영오 경상국립대학교 융합과학기술대학원 2021 국내석사

본 연구의 목적은 태양광 발전설비를 농지에 공동으로 위치시켜 태양광 발전과 농업생산을 동시에 수행할 수 있는 영농형태양광 발전사업의 보급을 위해 경제성분석을 통한 사업성 있는 최적의 영농형태양광 사업모델을 찾고자 하는데 있다. 영농형태양광 경제성 분석을 위한 프로젝트명을‘영농형태양광 1 MW 발전사업’이라고 하고, 본인의 토지에 설치하는 경우, 토지 임대를 통하여 설치하는경우, 농어촌상생협력기금을 활용하는 경우를 순현재가치(NPV), 내부수익률(IRR), 비용편익비율(B/C Ratio)의 분석방법을 통해 경제성 분석을 하였다.본인의 토지에 영농형태양광을 설치하는 경우에는 순현재가치(NPV)는 71,494천원으로‘0’보다 크고, 내부수익률(IRR)은 5.15%로 기준 할인율인 4.7% 보다 크며, 비용편익비율(B/C Ratio)은 1.037로 사업성 판단 기준인‘1’보다 크므로, 세가지 모든 조건에서 사업성이 있는 걸로 나오고, 토지를 임대하여 영농형태양광을 설치하는 경우에는 순현재가치(NPV)가 –212,481천원으로‘0’보다 작고, 내부수익률(IRR)은 3.31%로 기준 할인율 4.7% 보다 작으며, 비용편익비율(B/C Ratio)은 0.889로 사업성 판단 기준인‘1’보다 작으므로, 세가지 모든 조건에 부합하지 못해 사업성이 없는 걸로 나왔다.또한, 농어촌상생협력기금을 활용하여 영농형태양광을 설치하는 경우에는 자기자본금 2억원을 제외한 나머지 18억원을 상생협력기금에서 지원을 받으므로, 순현재가치(NPV)는 1,618,314천원으로‘0’보다 크고, 내부수익률(IRR)은 78.95%로 기준 할인율인 4.7% 보다 크며, 비용편익비율(B/C Ratio)은 1.847로 사업성 판단기준인‘1’보다 크므로, 세가지 모든 조건에서 사업성이 있는 걸로 나와, 농어촌상생협력기금을 활용한 영농형태양광 사업모델이 영농형태양광의 보급을 위한 최적의 사업모델임을 확인할 수 있다.영농형태양광 발전사업의 확산을 위해 농어촌상생협력기금을 활용한 사업모델을 먼저 한국남동발전을 비롯한 6개 발전공기업을 중심으로 2021년 현재까지 출연된 721억원의 상생협력기금을 적극 활용하여 공기업별 연간 300 kW씩 10년사업을 했을 경우 현재 2.7 MW 대비 667%나 증가한 18 MW를 달성할 수 있을것으로 본다.향후에는 영농형태양광 발전사업의 전국적인 확산을 위해서는 사업 수익성 제고노력과 영농형태양광 기술개발 뿐만 아니라, 인허가 등의 제도정비 및 주민참여형 사업모델 개발 등 다양한 측면에서의 사업화 노력이 필요할 것으로 판단된다. The purpose of this study is to find the best agro-photovoltaic generating business model that can fulfill sunlight generation and agricultural production at the same time through economic analysis. The title of campaign for the economic analysis is 'Agro-Photovoltaic 1 MWProject.’ In case of installing on one’s own land, leased land and using farming and fishing village’s cooperstion fund are analysed by net present value (NPV), internal return rate (IRR), and cost-benefit ratio (B/C Ratio). In case of installing a agro-photovoltaic equipment on one’s own land, NPV would be 71,494,000 won which is greater than ‘0’, IRR would be 5.15% which is bigger than the base discount rate(4.7%) and B/C Ratio would be 1.037 which is larger than business feasibility criteria ‘1’. There is business feasibility in all three conditions. In case of installing a agro-photovoltaic equipment on leased land, NPV would be -212,481,000 won which is less than ‘0’, IRR would be 3.31% which is less than the base discount rate(4.7%), and B/C Ratio would be 0.889 which is less than business feasibility criteria ‘1’. Since it does not meet all three conditions, it is not businessable. In case of setting a agro-photovoltaic equipment up by farming and fishing village’s cooperation fund, about 1.8 billion won excluding equity capital (0.2 billion won) can be supported from the fund. By analysis, NPV would be 1,618,314,000 won which is greater than ‘0’, IRR would be 78.95% which is larger than the base discount rate(4.7%) and B/C Ratio would be 1.847 which is bigger than business feasibility criteria. We can figure out that the business model, utilizing the farming and fishing village’s cooperation fund is the most optimal option.By using the agro-photovoltaic generation project supported from the Rural Win-win Cooperation Fund, higher energy generation could be achieved. If each of six power generation public enterprises including KOEN(Korea South-East Power Co.) produce 300 kW for 10 years while utilizing the fund(about 72.1 billion won), 18 MW can be generated, which is 667% higher than current 2.7 MW. In the future, to spread out the agro-photovoltaic generation projects, numerous efforts need to be made in various ways, including enhancing business profitability, developing agro-photovoltaic technologies, reorganizing and improving the system such as licensing, and developing residentparticipatory business models.

次世代 SOFC(Solid Oxide Fuel Cell) 技術에 관한 硏究

박창학 경상대학교 융합과학기술대학원 2019 국내석사

This paper is to study Solid Oxide Fuel Cell("SOFC") technology which is becoming increasingly more important in recent power development market. It will further discuss the most suitable fuel cell type for South Korea through economic and efficiency analysis by type of fuel cell in operation. Fist of all, the government's new and renewable energy policy outlook, starting with a recent survey on the domestic and foreign fuel cell market trends, is used to determine the feasibility of the fuel cell business. In this paper, I analyzed the characteristics of SOFC development, theoretical study of the system technology and the level of progress in SOFC technology for each generation. Finally, the efficiency and the economics of Polymer Electrolyte Membrane Fuel Cel("PAFC") and SOFC were analyzed based on actual operational data. In particular, this paper will discuss the true value of SOFC through a projected business feasibility study over the next 30 years, taking into account sales including REC market trend and operating costs.

신기후 체제하의 석탄화력 대체연료에 관한 연구

서진호 경상대학교 융합과학기술대학원 2017 국내석사

The efforts of countries to reduce GHG emissions worldwide, the Paris Agreement was signed. As a result, awareness of global climate change is being as more as widespread and detailed practices are being developed in many countries around the world for the detailed GHG mitigation measures. South Korea also submitted about 19.4% reduction plan to the United Nations by cutting 64.5 million tons in 2030 compared to BAU in the power generation sector. Therefore, the power generation industries in Korea have to minimize the generation of greenhouse gases and the emission of substances influenced by the atmospheric environment during the electric power production process. The economic value of the coal-fired power plant to be abolished is estimated to remain at around 5trn won from 2.5trn won. The generation company has known that the amount of carbon dioxide generated during the electricity production process was 204,246 thousand t-CO2 as of 2016. And we have analyzed the characteristics of solid, liquid, gaseous fuel, and wood pellet fuel as alternative fuels and have investigated the possibility as alternative fuels. As a result of testing the feasibility of fuel conversion to coal-fired power plants through the coal power generation test and the co-firing test of wood pellet as an alternative fuel, the environmental and combustibility were confirmed through the co-firing test results within the confinement ratio of 5% or less. And also, as a result of the operation of wood pellet 100% burning, the amount of sulfur oxide, nitrogen oxide, which are a secondary fine particle of the fine dust, was reduced by about 71.3% and 63% respectively. Conclusively, the economic feasibility of wood pellets has been judged to be a suitable fuel for RPS policies such as electricity sales revenue, REC sales, and avoidance of RPS penalties, as compared with a coal power generation.

공공 및 민간 훈련기관의 직업교육훈련 현황 및 발전방향

백영희 경상국립대학교 융합과학기술대학원 2022 국내석사

본 논문은 직업교육훈련에 대한 기본적인 이해를 바탕으로 해외 및 국내의 직업교육훈련 사례를 살펴보고, 우리나라 직업교육훈련을 담당하고 있는 공공 및 민간직업훈련기관에서 실시하고 있는 직업교육훈련 체계와 현황, 그리고 성과에 대해 분석하였으며, 의도적 선택방법으로 대상자를 선정하여 실시한 인터뷰 조사 결과를 분석하여 결과를 도출하고 그에 따른 발전 방향과 비젼을 중심으로 기술하였다. 4차 산업혁명에 따라 급변하는 산업구조변화에 대응하기 위한 직업교육훈련의 방향에 대한 논의와 해법을 다루었으며, 커리큘럼과 교수자의 교수법, 교육훈련의 장소 등을 포함한 직업교육훈련의 패러다임 전환점을 시사하였다. 현장 전문가와 훈련생을 대상으로 현장의 목소리를 듣는 방법을 통해 현장에서 경험하는 직업교육훈련에 대한 긍정평가와 부정평가를 수집하여 분석하였으며, 산업체 수요 대응과 동시에 실업자 해소를 위한 방안으로 민간훈련기관의 활성화 필요성을 제시하였다.

조도계수 개선형 코팅관을 이용한 우수관로 규격 최적화 연구

이재원 경상국립대학교 융합과학기술대학원 2026 국내석사

기후 변화와 도시화의 영향이 증가함에 따라, 충분한 우수(雨水) 배수 능력을 확보하는 것이 중요한 과제로 부각되고 있다. 이에 따라 관 내부의 조도를 감소시켜 유속을 향상시키는 코팅 관로 기술이 주목받고 있다. 본 연구는 매닝 조도계수가 개선된 코팅 관로의 수리학적 효율성, 경제성, 그리고 현장 적용성을 종합적으로 평가하는 것을 목적으로 한다. 매닝 방정식을 활용하여 조도계수를 달리 적용한 수리해석 모델을 구축한 결과, 조도계수가 0.013에서 0.009로 감소할 경우 유속이 최대 1.44배까지 증가하며, 동일 유량 조건에서 관경을 약 20%까지 축소할 수 있는 것으로 나타났다. 이러한 특성은 특히 설치 공간이 제한적인 도심 환경에서 시공성과 유지관리 측면에서 장점을 제공한다. 그러나 실제 공사비를 반영한 경제성 분석 결과, 코팅 비용이 기존 철근콘크리트관 대비 약 4.3배에 달하는 것으로 나타나, 초기 건설비와 생애주기비용(LCC) 모두에서 경제성이 불리한 것으로 평가되었다. 유지관리 주기 연장에 따른 비용 절감 효과 또한 전체 사업비 대비 미미한 수준에 그쳤다. 이러한 경제성 부족의 원인은 고가의 원재료, 복잡한 코팅 공정, 그리고 표준화된 공사비 기준 및 설계 지침의 부재에 기인한다. 따라서 코팅 관로의 실질적인 적용을 위해서는 원재료의 국산화, 공정 자동화, 성능 기반의 표준 단가 체계 구축, 그리고 생애주기비용(LCC) 중심의 공공사업 평가 제도 개선이 필요하다. 결론적으로, 조도계수가 개선된 코팅 관로는 현 단계에서는 경제성이 확보되지 않았으나, 향후 기술 혁신과 정책적 지원이 병행될 경우 지속 가능한 도시 인프라 대안으로서 상당한 잠재력을 지닌 것으로 판단된다. With the increasing impact of climate change and urbanization, securing sufficient stormwater conveyance capacity has become a critical issue. As a result, coated pipe technologies designed to reduce internal roughness and improve flow velocity are gaining attention. This study aims to comprehensively evaluate the hydraulic efficiency, economic feasibility, and field applicability of coated pipes with improved Manning’s roughness coefficients. A hydraulic model was developed by applying varying roughness values using Manning’s equation, and the results indicate that when the roughness coefficient decreases from 0.013 to 0.009, flow velocity increases by up to 1.44 times, enabling approximately 20% pipe diameter reduction under the same discharge conditions. Such characteristics offer advantages in constructability and maintenance, particularly in confined urban installation environments. However, economic analysis incorporating actual construction costs revealed that coating expenses are approximately 4.3 times higher than those of conventional reinforced concrete pipes, resulting in unfavorable outcomes for both initial construction and life-cycle costs (LCC). The cost reduction effect associated with extended maintenance cycles was also marginal relative to the total project cost. This lack of economic feasibility stems from high-priced raw materials, complex coating processes, and the absence of standardized cost criteria and design guidelines. Therefore, the practical adoption of coated pipes requires localization of raw materials, process automation, development of performance-based standardized unit prices, and improvement of public project evaluation systems centered on LCC analysis. In conclusion, although coated pipes with improved roughness coefficients are not economically viable at the current stage, they hold substantial potential as a sustainable urban infrastructure alternative when future technological innovation and policy support are achieved.

수상태양광 친환경(EVA) 부력체에 관한 연구 : 수상태양광 발전설비 태양광 모듈, 구조물 등을 수면으로 플로팅(floating) 하는 친환경 부력체을 중심으로 시험 연구

오국환 경상국립대학교 융합과학기술대학원 2024 국내석사

This study found that the proportion of new and renewable energy power generation facilities to achieve the carbon neutral 2030 national greenhouse gas reduction goal has increased very rapidly in the case of solar power generation facilities over the past five years, leading to ground collapse due to heavy rain due to indiscriminate destruction of forests, farmland, and forests. Meanwhile, floating solar power generation is rapidly emerging as an alternative technology to land-based solar power generation around the world, and there are many advantages to developing and operation floating solar power, but it is a buoyant body that floats solar power modules and structures such as typhoons, tsunami, and wave heights. Research and development is actively underway, and in particular, as damage to buoyancy bodies, which is a vulnerability of floating solar power generation facilities, has been highlighted as a cause of eco-friendly(EVA) buoyancy bodies to improve buoyancy excellence was also achieved in various aspects such as resilience, environmental friendliness, maintenance, and durability

풍력발전단지 입지선정을 위한 발전량 예측에 관한 연구 : 풍력발전단지 입지선정 계획은 풍속이 우수한 지역중심으로

최창용 경상국립대학교 융합과학기술대학원 2021 국내석사

This paper deals with the prediction of generation output essential for verifying the feasibility of installed offshore wind power generators. So it is derived a new probabilistic output expression that combines a wind generator output with a generator output characteristic curve. It also explains how wind speeds measured on the ground can be corrected to wind speeds at the height of the wind generator, as the wind speed change depending on the location. This derived output prediction method is applied to the planned wind farms in Joguri and Dapori areas in southern Geoje Island to predict the output. The results and methods in this study are expected to be useful for profitability evaluation of planning new wind farm.