• Title/Summary/Keyword: Photovoltaic effect

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

  • Woo, Sang-Woo;Kim, Hong-Woo;Kim, Sung-Soo
    • Journal of the Korean Solar Energy Society
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    • v.29 no.4
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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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    • v.34 no.6
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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.

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

  • Moon, Chae-Joo;Lim, Joung-Min;Cheang, Eui-Heang;Park, Sang-Jin;Park, Gui-Yeol
    • 한국태양에너지학회:학술대회논문집
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    • 2008.11a
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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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Photovoltaic effect in $\beta$-carotene glass ($\beta$-carotene glass의 광기전력효과)

  • 김의훈
    • 전기의세계
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    • v.20 no.4
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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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A Study of the Thermal Characteristics of a Photovoltaic Device with Surface Texturization (표면 Texturization을 가진 Photovoltaic Device 내부의 열 분포 특성에 관한 연구)

  • Jung, Ji-Chul;Moon, Kyoung-Sook;Koo, Sang-Mo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.23 no.7
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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.

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

  • Oh, Jungkeun;Kim, Jun-Ho;Kim, Seung-Sup;Kim, Hyochul;Lew, Jae-Moon
    • Journal of the Society of Naval Architects of Korea
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    • v.53 no.4
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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.

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

  • Kang, Kyung-Chan;Lee, Jin-Seob;Kang, Gi-Hwan;Huh, Chang-Su;Yu, Gwon-Jong
    • 한국태양에너지학회:학술대회논문집
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    • 2008.04a
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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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A Study on Modeling of Tracking-Type Floating Photovoltaic System based on Matlab/Simulink (매틀랩/시뮬링크 기반 추적식 수상태양광 발전시스템의 모델링에 관한 연구)

  • Kim, In-Soo;Oh, Sung-Chan;Kim, Yang-Mo;Choi, Young-Kwan
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.5
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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.

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

  • Moon, Chae-Joo;Lim, Joung-Min;Chang, Young-Hak;So, Soon-Youl;Choi, Byung-Chun
    • Proceedings of the KIEE Conference
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    • 2008.07a
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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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Temperature Characteristics Analysis of Major Heating Region According to Cooling Device Location of Grid-Connected Photovoltaic Inverter (계통연계형 태양광 인버터의 냉각장치 위치에 따른 주요발열부 온도특성 해석)

  • Kim, Min-Seok;Kim, Yong-Jae
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.7
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    • pp.799-804
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    • 2014
  • To combine to the power transmission, photovoltaic inverter is demanded, because the photovoltaic system is generated direct current power. However, photovoltaic inverter is sensitive to high temperature. In the temperature rising such as at noon and on summer, efficiency of machine is decreased due to the loss increment. Because this problem causes national energy loss according to the expanding the photovoltaic industry, countermeasure is demanded. There, in this paper, we installed a cooling system using a thermoelement regardless of the temperature. Also, we analyze the cooling effect according to the position of two fans which improve the effect maximize.