• Title/Summary/Keyword: Floating PV

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Analytical strategies for floating solar PV policy development in South Korea

  • Lee, Youhyun;Kim, Kyoungmin
    • Membrane and Water Treatment
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    • v.13 no.1
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    • pp.7-14
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    • 2022
  • Using the SWOT-AHP method, this study identifies the priorities in the development of floating solar photovoltaics (PV) and suggests possible strategies. Our study analyzed the priorities in planning future solar PV strategies based on the opinions of 27 experts. Our results indicate that the government should expand support while emphasizing the benefit of floating solar PV in that it causes less environmental damage compared to onshore solar PV. In addition, the government should properly deal with the public-private conflict regarding the installation of floating solar PV. Floating solar PV itself has not reached a mature technological and institutional stage, but could be an option or alternative for saturated onshore solar PV facilities in Korea.

Design and Analysis of State-of-the-Art Technologies for Development of Floating Photovoltaic System (수상태양광 발전시스템 설계 및 요소기술 분석)

  • Jin, Taeseok
    • Journal of the Korean Society of Industry Convergence
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    • v.17 no.4
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    • pp.227-233
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    • 2014
  • Information presented in this study is intended to inform candidates as they prepare to design and structure the floatovoltaics solar power system. A developed floatovoltaics solar power generation results from the combination of PV plant technology and PV floating technology. This floating-based PV system is a new concept for PV development. The PV floating technology opens new opportunities to give value to unused areas so far while preserving valuable land for more adapted activities. Therefore the land-use conflicts are avoided and the environmental impact is minimized. Therefore the technology offers an interesting opportunity to regions facing on drought during summer time without any negative impact to the eco-system. This study describe the basic components of a floatovoltaics solar power system. A typical system consist of floating system and solar modules, a control device, rechargeable batteries, a load or device and the associated electrical connections. The floating system is specifically designed to keep all metallic components above water leaving only 100% recyclable, closed cell foam filled HDPE plastic floats in contact with the water. As the first case that can maximize the power generation efficiency of PV internationally, it is expected that this study will be utilized as a primary guide for future development of floating type PV system.

Effect of the floating body shape and other composition on the hydrodynamic safety of floating photo-voltaic system (수상 태양광 발전 시스템의 부유체 형상과 구성요소가 수력학적 안전성에 미치는 영향)

  • Choi, Ji-Woong;Lee, Gyu-Han;Kim, Jae Un;Heo, Nam Wook;Cha, Yong Hyun;Ha, Hojin
    • Journal of the Korean Society of Visualization
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    • v.19 no.1
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    • pp.18-27
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    • 2021
  • As the photo-voltaic (PV) industry grows, the floating PV has been suggested to resolve current environmental destruction and a lack of installation area. Currently, various floating PV systems have been developed, but there is a lack of studies on how the shape of the floating body and other compositions are affecting structural behavior. In this study, the behavior of the floating PV was investigated at the various length of mooring lines, stiffness of connecting hinges, and size of floating bodies. The shortest mooring lines with the distributed type floating PV showed the least force on the floating body and corresponding motion. A frictionless hinge is safer at the regular and low-height wave, while a stiff hinge is safer at irregular and high-height wave. In addition, due to the bi-axial distribution of the connecting hinge, 45° direction wave was found to be the most dangerous.

Transmission Loss from Voltage Drop in a DC Cable for a Floating Photovoltaic System in a Reservoir (저수지 내 수상태양광의 전압 강하에 의한 직류 송전 손실)

  • Bhang, Byeong Gwan;Woo, Sung Cheol;Lee, Wonbin;Choi, Jin Ho;Shin, SeungWook;Lee, ChulSung;Park, MiLan;Won, Changsub;Ahn, HyungKeun
    • New & Renewable Energy
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    • v.16 no.1
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    • pp.47-57
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    • 2020
  • In Floating PV (Photovoltaic) systems, PV modules are installed on water by utilizing the surface of idle water such as a reservoir and multipurpose dam. A floating PV system, therefore, has the advantage of efficiency in national land use and improved energy yield owing to cooling effect compared to on-land PV systems. Owing to the limitation of installation environment for a floating PV system, the system, however, has the disadvantage of an increase in transmission distance of DC (Direct current) cables. A longer transmission distance of a DC cable results in greater power loss due to a voltage drop. This leads to a decline in economic feasibility for the floating PV system. In this paper, the economic analysis for 10 floating PV systems installed in a reservoir has been conducted in terms of a change in annual power sales according to the variation of transmission losses depending on the factors affecting the voltage drop, such as transmission distance, cross-section area of underwater cable, the presence of joint box, and PV capacity.

Analysis of Grounding Resistance for Zero Energy Town Floating PV System Using Underground Wiring (매설지선 방식을 적용한 에너지 자립마을용 수상 태양광 발전 시스템의 접지저항 분석)

  • Ko, Jae-Woo;Lim, Jong-Log;Kim, David K.;Cha, Hae-Lim;Kim, Si-Han;Lee, Chang-Koo;Ahn, Hyung-Keun
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.29 no.5
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    • pp.303-306
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    • 2016
  • Floating PV system is installed on the water such as artificial lake, reservoir, river for the purposes of zero energy town and/or large scale of PV station. There are electrical gains from cooling effect by water and reflection of water surface. Particularly, floating PV power station with high efficiency solar cell modules receives a lot of attention recently. Floating PV system is installed on the water, which means grounding method to the frame of solar cell and electrical box such as connector band and distribution panelboard should be applied in different way from grounding method of PV system on land. The grounding resistance should be 10[${\Omega}$] in case the voltage is over 400[V] in accordance with Korean Standard. The applicable parameters are the resistivity of water in various circumstances, depth of water, and length of electrode in order to meet 10[${\Omega}$] of grounding resistance. We calculated appropriate length of the electrode on the basis of theoretical equation of grounding resistance and analyzed the relation between each parameters through MATLAB simulation. This paper explains grounding system of floating PV power station and presents considerations on grounding design according to the resistivity of water.

Comparative Study of Effect of Wind and Wave Load on Floating PV: Computational Simulation and Design Method (수상 태양광 발전 부유체에 대한 풍하중과 파랑하중을 통한 전산 해석과 설계적 방법의 비교 연구)

  • Lee, Gyu-Han;Choi, Ji-Woong;Seo, Ji-Hyun;Ha, Hojin
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.18 no.11
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    • pp.9-17
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    • 2019
  • Interest in renewable energy is rapidly growing around the world. One of the most popular renewable energy sources is solar power, and photovoltaic (PV) systems are the most representative route for generating solar energy. However, with the growing adoption of solar power systems, the demand for land on which to install these systems has increased, which has caused environmental degradation. Recently, floating PV systems have been designed to utilize idle water surface areas of dams, rivers, and oceans. Because floating PV systems will be exposed to harsh environmental stresses, the safety of such systems should be secured before installation. In this study, the structural robustness of a floating PV system was analyzed by conducting numerical simulation to investigate whether the system can withstand harsh environmental stresses, such as wind and wave loads. Additionally, conventional wind and wave load predictions based on the design method and the simulation results were compared. The comparison revealed that the design method overestimated wind and wave loads. The total drag of the PV system was significantly overestimated by the conventional design criteria, which would increase the cost of the mooring system. The simulation offers additional advantages in terms of identifying the robustness of the floating PV system because it considers real-world environmental factors.

Policy Agenda Setting of Floating Solar PV - Based on the Co-evolution of Technology and Institutions - (수상태양광 정책의제설정 연구 - 기술과 제도의 공진화 관점 -)

  • Lee, Youhyun;Kim, Kyoung-min
    • Journal of Korean Society on Water Environment
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    • v.37 no.6
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    • pp.493-500
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    • 2021
  • Floating solar photovoltaic (hereinafter PV) power generation is emerging as a proper alternative to overcome various environmental limitations of existing offshore PV generation. However, more government-led policy design and technical and institutional development are still required. Based on the policy agenda setting theory and technological innovation theory, this study contains the research questions concerning the co-evolution of technology and the floating solar PV policy. This study primarily evaluates the technological and institutional development level of floating solar PV policy through a survey of domestic floating solar PV experts. Secondly, we also analyze the kind of policy agenda that should be set a priori. Analyzing the priorities to be considered, the first environmental enhancement needs to be considered from both the technical and institutional aspects. The second candidate task for the policy agenda is residents' conflict and improvement of regulations. Both candidate tasks need to be actively considered in the policy agenda from the institutional point of view. The third is publicity, profit sharing, follow-up monitoring, and cost. Among them, public relations and profit sharing are tasks that need to be considered in the policy agenda from the institutional point of view. On the other hand, the cost of follow-up monitoring should be considered as a policy agenda in terms of technology, system, and common aspects. Finally, there are technical standards. Likewise, technical standards need to be considered in the policy agenda in terms of both technical and institutional commonality.

Development of Element Technique for the Floating PV Generation Structure Using FRP (FRP를 활용한 수상 부유식 태양광발전 구조물의 요소기술 개발)

  • Seo, Su-Hong;Choi, Jin-Woo;Joo, Hyung-Joong;Nam, Jeong-Hun;Yoon, Soon-Jong
    • Composites Research
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    • v.27 no.3
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    • pp.103-108
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    • 2014
  • Fiber reinforced polymer plastic (FRP) structural members are recently available in construction industries due to various material properties such as high specific strength and stiffness, light-weight, and corrosionresistance. The floating PV generation structure can also be an illustration for applying FRP in construction applications. The floating PV generation structure has been recently issued as a representative item for the low carbon and green growth campaign and many related studies have been conducted for the structural safety and commercial viability. Moreover, the floating PV generation structures for the commercial purpose have been constructed. In this paper, the investigation and development processes of elements for the floating PV generation structure are presented during commercialization.

The Electrical Characteristics of The Modules According to The Environment of The Floating Photovoltaic System (수상태양광 발전 시스템의 환경에 따른 모듈의 전기적 특성)

  • Hwang, Soo Hyun;Lee, Dong Yeong;Kwon, O geuk;Lee, Jae Hyeong
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.31 no.5
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    • pp.283-289
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    • 2018
  • In our study, we collected data from a 100 kW floating photovoltaic (PV) system installed in Gyeongnam Hapcheon Dam and observed correlations between the power generation of the floating PV system and the irradiance, water temperature, humidity, ambient temperature, wind speed, and module temperature. Firstly, there was little correlation between the water temperature and power generation. Secondly, the ambient temperature, wind speed, and humidity all showed greater correlations with power generation. Finally, the power generation was very highly correlated with the irradiance and module temperature. In conclusion, the power generation of the floating PV system is related individually to environmental factors.

The Efficiency Analysis of Tracking-Type Floating PV System (추적식 수상 태양광 발전 시스템 성능 분석)

  • Yang, Yoen Won;Jeong, Seon Ok;Shin, Hyun Woo;Lee, Kil Song
    • Current Photovoltaic Research
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    • v.1 no.2
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    • pp.122-125
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    • 2013
  • The Floating Photovoltaic System was installed on the surface of water. There were some researches in this subject. But there was not many studies with experiment on a high waterproof Floating Photovoltaic modules. The aim of this study was to analyze the performance of the Floating Photovoltaic System. For this experiment, a high waterproof Floating Photovoltaic modules were designed and applied to the module capacity of 10 kW Tracking-Type structure. The experiment results indicated the performance of the daily production is 51.6 kW; the production capacity of Floating Photovoltaic System is expected to be 23% higher than that of the ground-mounted photovoltaic system.