• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.10
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• pp.1532-1539
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• 2017

The floating photovoltaic system is a new concept in the renewable energy technology. That is similar to land based photovoltaic technology except floating system. So the system needs buoyant objects, mooring, ect, besides modules and supports, and that is able to withstand in water level changes and wind strength. Therefore the floating photovoltaic system is much different from land photovoltaic system. K-water (Korea Water Resources Corporation) has been operating two floating photovoltaic system that's capacity is 100 kW and 500 kW respectively since in summer 2011 for commercial generation, and have construction project for 2,000 kW in Boryeong multipurpose Dam and other areas. Furthermore K-water was developing a tracking-type floating photovoltaic system at Daecheong multipurpose Dam and developed and installed an ocean floating photovoltaic demonstration plant at Sihwa Lake in October 2013 for R&D. In this paper, we introduce that structure of floating photovoltaic system include buoyant structure, mooring system and auxiliary device. Especially the rope which is in part of mooring should be always maintain tension under any water level. Also we explain about structure design concept to wind load in an every loading condition and a kind of structure materials and PV structure types used in water environment. Especially ocean floating PV system is affected by tidal current and typhoon. So there are considering the elements in design. Finally we compare with floating and land photovoltaic on power amount. As a result of that we verified the floating photovoltaic system is more about 6.6~14.2 % efficiency than a general land photovoltaic system.

• 한국신재생에너지학회:학술대회논문집
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• 2010.06a
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• pp.184.3-184.3
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• 2010

This study suggests a modeling of grid-connected wind turbine generation systems and performs simulation according to increase/decrease of real wind speed. MATLAB & SIMULINK implemented modeling of grid-connected wind turbine generation system. Terminal voltage, grid voltage, and active/reactive power shall be observed following the performance of simulation.

• Proceedings of the KIPE Conference
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• 2011.11a
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• pp.161-162
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• 2011

신재생에너지는 자연계에 존재하는 에너지원으로 이용하는 이상의 속도로 재생되는 에너지원이다. 그 에너지원은 태양, 풍력, 조력 등으로 사실상 고갈되지 않는 에너지원이며 또한 수력, 태양광, 태양열, 조력, 풍력, 지열, 바이오매스 등의 형태로 이용된다. 이들 에너지원은 직접, 또는 간접적으로 이용하는 경우가 있다.

• 한국신재생에너지학회:학술대회논문집
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• 2005.06a
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• pp.132-135
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• 2005

A modular photovoltaic PCS with high-frequency isolation is proposed. The proposed system consists of a SEPIC converter and a full-bridge inverter. Using the power slope versus voltage of the PV array, the MPPT controller is proposed that produces a smooth transition to the maximum power point. The disturbance of the line voltage is detected using a fast sensing technique. Experimental results obtained on a 500W prototype show high performance such as almost unity power factor, $90\%$ power efficiency, $3.6\%$ THD.

• 한국신재생에너지학회:학술대회논문집
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• 2008.05a
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• pp.456-459
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• 2008

The 10t/d pyrolysis demonstration plant for waste tire recycling have been constructed and operated for commissioning of the plant. The plant have the tube reactor with chain conveyer attached disk. The reactor temperature is 500$\sim$600deg.C and pressure is -80$\sim$-100mmHg. Non-condensable gas is used as fuel for pyrolysis heat source.

• 한국신재생에너지학회:학술대회논문집
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• 2005.11a
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• pp.286-298
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• 2005

농산 폐자원으로부터 식품 및 의약품 소재로 쓰이는 xylose, arabinose, cellulose를 생산하였다. 농산 폐자원은 우리나라 실정에 적합한 볏짚과 옥수수 껍질을 선택하였으며, 공정수율은 xylose와 arabinose는 약 15$\sim$20%(w/w), cellulose 는 20%(w/w)로 나타났다. 폐자원을 활용하는 개발된 공정중에는 미생물 유전자 재조합 기술을 응용하여 고역가의 효소생산 system을 개발하여, 생산된 효소를 가수분해 공정 과정에 투입하여 경제성이 높고 친환경적인 기술로 확립하였다. 재조합 미생물과 xylose, arabinose 정제공정은 신뢰 높은 재연성을 나타냈으며 xylose 제조법과 xylitol 발효법은 package 형태로 기술 이전을 준비하고 있다.

• 한국신재생에너지학회:학술대회논문집
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• 2006.11a
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• pp.9-14
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• 2006

Open loop or ground water heat pump systems are the oldest of ground-source systems. Standing column wells can be used as highly efficient ground heat exchanger in geo-thermal heat pump systems, where hydrological and geological conditions are suitable. These systems require some careful considerations for well design, ground water flow, heat exchanger selection etc This paper describes 9round water temperature variations, performances in heat ins and cool ing mode and the results of ground water analysis.

• Proceedings of the KIPE Conference
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• 2019.11a
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• pp.214-215
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• 2019

최근 신재생에너지 시스템의 보급 및 확산에 따라 자가발전시스템에 관한 연구가 활발히 이루어지고 있다. 특히 도시의 빌딩에 에너지를 효율적으로 공급 및 관리하기 위해 다양한 발전원의 하이브리드 시스템의 필요성이 대두되고 있다. 본 논문에서는 태양광(PV, Photovoltaic), 연료전지(FC, Fule Cell), 바나듐 레독스 흐름전지(VRFB, Vanadium Pedox Flow Battery)를 사용하여 도시형에 적합한 빌딩용 신재생에너지 하이브리드 발전/저장 시스템을 제안한다.

• Journal of Electrical Engineering and Technology
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• v.11 no.5
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• pp.1108-1115
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• 2016

• 한국신재생에너지학회:학술대회논문집
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• 2006.06a
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• pp.431-433
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• 2006

Accurate information on the ground surface temperature is essential for design of a borehole heat exchanger and thus ensuring the performance of a ground source heat pump system along with knowledge on thermal diffusivity and conductivity of ground. In this study we analyzed the shallow subsurface temperature monitoring data of 58 Korea Meteorological Administration synoptic stations. As a result, we compiled mean annual ground surface temperature distribution map using multiple regression analysis of the monitoring data.