• 제목/요약/키워드: Photovoltaic effect

검색결과 481건 처리시간 0.031초

태양광-풍력 하이브리드 발전기에서 태양전지모듈과 풍력발전기 이격거리 (Distance Between a Wind Turbine and a Photovoltaic Module in a Wind-Photovoltaic Hybrid Generation System)

  • 우상우;김홍우;김성수
    • 한국태양에너지학회 논문집
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    • 제29권4호
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    • pp.58-64
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    • 2009
  • This aim of the study is to demonstrate the effect of a photovoltaic module installed on a small wind-photovoltaic hybrid generation system. Computational fluid dynamics(CFD) is used to interpret the velocity field around the photovoltaic module and the blade areas of a wind turbine. According to the simulation results, it is obvious that x_velocity and y_velocity varies very significantly with time near the photovoltaic module. This would lead to an increase of periodic wind load caused by flow separation at the edge of the photovoltaic module. This study discusses the flow characteristics in term of velocity and frequency analysis. Moreover we suggest a distance between a photovoltaic module and a wind turbine to avoid partially the negative effect caused by the photovoltaic module.

Correlation Between Lateral Photovoltaic Effect and Conductivity in p-type Silicon Substrates

  • Lee, Seung-Hoon;Shin, Muncheol;Hwang, Seongpil;Park, Sung Heum;Jang, Jae-Won
    • Bulletin of the Korean Chemical Society
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    • 제34권6호
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    • pp.1845-1847
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    • 2013
  • The lateral photovoltaic effect (LPE) can be observed in semiconductors by irradiating a light spot position between electrodes on sample's surface. Because lateral photovoltaic voltage (LPV) is sensitively changed by light spot position, a LPE device has been tried as a position-sensitive detector. This study discusses the correlation between LPV and conductivity in p-type silicon and nano-structured Au deposited p-type silicon (nano-Au silicon), respectively. Conductivity measurement of the sample was carried out using the four-wire method to eliminate contact resistance, and conductivity dependence on LPV was simultaneously measured by changing the light irradiation position. The result showed a strong correlation between conductivity and LPV in the p-type silicon sample. The correlation coefficient was 0.87. The correlation coefficient between LPV and conductivity for the nano-Au silicon sample was 0.41.

목포대학교 기숙사 30[kW]급 태양광발전시스템 발전특성 (Operationg Characteristics of 50kW Utility Interactive Photovoltaic System)

  • 문채주;임정민;정의현;박상진;박귀열
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2008년도 추계학술발표대회 논문집
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    • pp.53-56
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    • 2008
  • A photovoltaic panel is a device that, through the photovoltaic effect, converts luminous energy into electric energy. Photovoltaic generation system used infinity of solar energy, cost of fuel is needless and there in no air pollution or waste occurrence. This paper summarizes the results of these efforts by offering a photovoltaic system structure in 30[kW] large scale applications installed in Mokpo National University dormitory roof. The status of photovoltaic system components, are inter-connection and safety equipment monitoring system will be summarized as this article. This describes configuration of utility interactive photovoltaic system which generated power supply for dormitory. In this paper represent 30[kW] utility photovoltaic system examination result.

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$\beta$-carotene glass의 광기전력효과 (Photovoltaic effect in $\beta$-carotene glass)

  • 김의훈
    • 전기의세계
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    • 제20권4호
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    • pp.23-30
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    • 1971
  • The photovoltaic behaviors ahve been observed with a sandwich-type cell, consisting of a junction between .betha.-carotene and stannic oxide conducting layer to provide a junction electrode. In the stannic oxide and .betha.-carotene junction it was found that its electromotive forse decreased to a value smaller than the original one. This is due to a space charge formation. Photovoltage reached approximately 40mV with an irradiation energy of 250Kcal/M$^{2}$hr. It appeared that a magnitude of the photovoltaic response was proportional to the logarithm of irradiance. The time constant of the photovoltaic effect was shown to be approximately 0.7 sec. The wavelength dependence of the photovoltaic behavior was very anomalous. It is assumed that such an anomalous photoresponse depends on a internal capacitance due to some bubble during process to make a cell.

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표면 Texturization을 가진 Photovoltaic Device 내부의 열 분포 특성에 관한 연구 (A Study of the Thermal Characteristics of a Photovoltaic Device with Surface Texturization)

  • 정지철;문경숙;구상모
    • 한국전기전자재료학회논문지
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    • 제23권7호
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    • pp.509-512
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    • 2010
  • The thermal distribution of 2D and 3D p-n photovoltaic diode structures with and without surface texturing has been studied. By analysis of the numerical simulation results of the I-V characteristics and lattice temperature distributions the effect of different texturing structures on the characteristics of silicon p-n photovoltaic devices has been studied systematically. The efficiency of the device having surface texturing shows more than ~2% enhancement compared to the reference devices which did not have texturing. In addition, the effect of the density of the texturing groove has been studied and it has been confirmed that the texturing structure not only improves the light trapping but also plays an important role in the heat radiation.

밸러스트 수 이동으로 태양을 추적하는 부유식 태양광 발전시스템 개발 (Note on the Development of Ballast Water Shifting System for Solar Tracking of the Floating Photovoltaic Plant)

  • 오정근;김준호;김승섭;김효철;류재문
    • 대한조선학회논문집
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    • 제53권4호
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    • pp.290-299
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    • 2016
  • The most powerful energy resource in nature is solar energy which becomes directly converted to electric power in worldwide. Most of the photovoltaic power plants are commonly installed on sunny side of the ground. Thus the installation of photovoltaic power plant could produce an unexpected adverse effect by sacrificing the productivity from green field or forest. To avoid these adverse effect floating photovoltaic plant has been devised and installed on inland reservoir. The photovoltaic plant could utilize ignored water surface without sacrificing the productivity of the ground. Additionally the photovoltaic efficiency has been reenforced by the cooling effect induced by the circulating air flow from water surface. The floating photovoltaic plant could be furnished solar tracking ability by tilting the system operated with the aid of the ballast system. This report is provided to introduce the design of the floating structure with solar panel which furnished solar tracking ability with the aid of ballast system.

태양전지모듈용 EVA Sheet의 특성 평가 방법 (Characteristic Evaluation Tools of EVA Sheet for Photovoltaic Module Fabrication)

  • 강경찬;이진섭;강기환;허창수;유권종
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2008년도 춘계학술발표대회 논문집
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    • pp.92-97
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    • 2008
  • To survive in outdoor environments, photovoltaic modules rely on packaging materials to provide requisite durability. We analyzed the properties of encapsulant materials that are important for photovoltaic module packaging. The properties of Ethylene Vinyl Acetate(EVA) sheet in photovoltaic encapsulant materials have to meet conditions that are high optical transmittance, good adhesion and high cross-linking rate. The objective of this paper is to understand the property evaluation methods of EVA sheet. Through this research, we could confirm that properties of EVA sheet have an effect on durability and operating efficiency of photovoltaic module.

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매틀랩/시뮬링크 기반 추적식 수상태양광 발전시스템의 모델링에 관한 연구 (A Study on Modeling of Tracking-Type Floating Photovoltaic System based on Matlab/Simulink)

  • 김인수;오승찬;김양모;최영관
    • 전기학회논문지
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    • 제64권5호
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    • pp.805-811
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    • 2015
  • Floating photovoltaic systems have been developed by the construction process such as design, construction, operation and management. Therefore, the power of floating photovoltaic systems has been calculated by using simple formulas and the optimal tracking interval is set by operation experience. But, flow characteristics have a decisive effect on it unlike land based PV systems. In this paper, a tracking floating photovoltaic system is modeled by using Matlab/simulink. The modeling for the floating photovoltaic system is verified through applying the flow characteristics based on actual operating data of 100㎾ class tracking floating photovoltaic.

30kW 고정식 태양광발전시스템의 발전 특성 조사 (Power Survey of 30kW Solar System without tracking mechanism)

  • 문채주;임정민;장영학;소순열;최병천
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 제39회 하계학술대회
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    • pp.1126-1127
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    • 2008
  • A photovoltaic panel is a device that, through the photovoltaic effect, converts luminous energy into electric energy. Photovoltaic generation system used infinity of solar energy, cost of fuel is needless and there in no air pollution or waste occurrence. This paper summarizes the results of these efforts by offering a photovoltaic system structure in 30[kW] large scale applications installed in Mokpo National University dormitory roof. The status of photovoltaic system components, are inter-connection and safety equipment monitoring system will be summarized as this article. This describes configuration of utility interactive photovoltaic system which generated power supply for dormitory. In this paper represent 30[kW] utility photovoltaic system examination result.

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계통연계형 태양광 인버터의 냉각장치 위치에 따른 주요발열부 온도특성 해석 (Temperature Characteristics Analysis of Major Heating Region According to Cooling Device Location of Grid-Connected Photovoltaic Inverter)

  • 김민석;김용재
    • 한국전자통신학회논문지
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    • 제9권7호
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    • pp.799-804
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    • 2014
  • 무한정한 발전자원과 무공해성 등의 장점을 가진 태양광 발전 시스템은 직류전력을 생산하기 때문에 계통의 연계송전이 가능한 교류전력으로 변환시켜주기 위해서는 태양광 인버터의 사용이 필요하다. 외부에 옥외형 구조로 노출되어 설치되는 소용량의 태양광 인버터는 태양이 강하게 내리쬐는 낮 시간 및 여름철과 같이 외부 환경의 온도가 상승함에 따라 에너지 손실이 발생하고 효율이 감소하게 된다. 태양광 발전 산업의 범위가 확대됨에 따라 태양광 인버터 또한, 상당한 에너지 손실 문제를 야기하므로 이에 따른 대책이 필요하다. 따라서 본 논문에서는 온도조건에 구애받지 않도록 태양광 인버터 외함에 열전소자를 부착한 냉각장치를 설치하고 냉각효과의 극대화를 위해 두 개의 냉각장치를 사용하여 위치 조절에 따른 냉각효과를 비교분석하고자 한다.