• Title/Summary/Keyword: Photovoltaic effect

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The Development of Photovoltaic Resources Map Concerning Topographical Effect on Gangwon Region (지형효과를 고려한 강원지역의 태양광 발전지도 개발)

  • Jee, Joon-Bum;Zo, Il-Sung;Lee, Kyu-Tae;Lee, Won-Hak
    • Journal of the Korean Solar Energy Society
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    • v.31 no.2
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    • pp.37-46
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    • 2011
  • The GWNU (Gangnung-Wonju national university) solar radiation model was developed with radiative transfer theory by Iqbal and it is applied the NREL (National Research Energy Laboratory). Input data were collected and accomplished from the model prediction data from RDAPS (Regional Data Assimilated Prediction Model), satellite data and ground observations. And GWNU solar model calculates not only horizontal surface but also complicated terrain surface. Also, We collected the statistical data related on photovoltaic power generation of the Korean Peninsula and analyzed about photovoltaic power efficiency of the Gangwon region. Finally, the solar energy resource and photovoltaic generation possibility map established up with 4 km, 1 km and 180 m resolution on Gangwon region based on actual equipment from Shinan solar plant,statistical data for photovoltaic and complicated topographical effect.

Performance Parameters of a Bifacial PV Device and Accurate Measurement Method for the Parameters (양면형 태양광발전 소자의 성능변수 및 이에 대한 정확한 측정방법)

  • Ahn, Seungkyu;Ahn, SeJin;Eo, Young Joo;Yoo, Jinsu;Park, Joo Hyung;Kim, Kihwan;Cho, Ara;Cho, Jun-Sik;Yun, Jae-Ho;Shin, Donghyup;Jung, Inyoung;Gwak, Jihye
    • Current Photovoltaic Research
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    • v.5 no.3
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    • pp.89-94
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    • 2017
  • We have examined the issues on the measurement of bifacial photovoltaic(PV) devices that should be considered in order to ensure a measurement accuracy beyond a certain level and the comparability between the bifacial PV devices. Based on the results of various experiments and previous studies, solutions for these measurement issues are suggested. The most significant technical issues in the performance measurement of the bifacial PV devices are 1) elimination of the effect due to the light reflection on the sample holder surface and 2) the measurement of the expected power generation gain in outdoor operation. The effect due to the light reflection on the sample holder surface can be eliminated by using an anti-reflective sample holder. In case of a reflective sample holder, if the bifacial device have a linear characteristic with respect to the irradiance of incident light, it has been confirmed (through some previous studies and additional experiment) that exact measurement results can be obtained by the correction of the measurement data. In addition, it was also confirmed that the expected power generation gain in the outdoor operation can be obtained by three different methods along with the basic concepts of the bifaciality coefficient, the albedo, and the effective front irradiance.

Photovoltaic Effect of Adsorbed Metallophthalocyanine on Zinc Oxide (프탈로시아닌이 흡착된 산화아연의 광기전력효과에 관한 연구)

  • Soun-Ok Heur;Young-Soon Kim
    • Journal of the Korean Chemical Society
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    • v.37 no.4
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    • pp.416-422
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    • 1993
  • As a result of adsorbing phthalocyanine (metal free, ${\alpha}\;and\;{\beta}$-Cu) on zinc oxide in aqueous solution using nonionic surfactant, all of the added dye was adsorbed and Na salt of sulfonated phthalocyanine showed the Langmuir monolayer adsorption. To analyze the effect of adsorption on zinc oxide, photovoltage was measured using surface photovoltmeter. The high photovoltaic effect was observed at intrinsic wavelength of zinc oxide and wavelength of adsorbed phthalocyanine dye. Metal free phthalocyanine, ${\alpha}$-copper phthalocyanine and ${\beta}$-copper phthalocyanine showed the highest photovoltaic effect when the percentage of coverage (${\theta}_{BET}$) for zinc oxide is about 80, while sulfonated phthalocyanine showed the highest photovoltaic effect when the percentage of coverage for zinc oxide is about 30.

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A Study on the Photovoltaic Array Optimal Arrangement Considering Power Output (출력을 고려한 태양전지 어레이 최적 배치에 관한 연구)

  • Choi, Hong-Kyoo;Choi, Dae-Won;Yoo, Hai-Chool;Choi, Shin-Gwon;Kim, Young-Kyu
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.12
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    • pp.96-105
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    • 2009
  • Photovoltaic array distance will be calculated that can have maximum output through the rearrangement of photovoltaic array by comparing and analyzing the power output decrease from the shadows of photovoltaic arrays according to the consideration of incidence angle that is not suitable to the situation of our country among the causes of power output decrease by sampling photovoltaic power generation plants. When relocate simulation result photovoltaic array 1 line, when relocate about 2.8[%], photovoltaic array 3 lines when relocate about 1.2[%], photovoltaic array 2 lines, output of about 5.0[%] improved. Also, gained space gains of photovoltaic array party 1.29[m] when relocate photovoltaic array party 0.82[m], 3 lines when relocate photovoltaic array party 0.39[m], 2 lines when relocate 1 line. As gains occur on photovoltaic array clearance, time that receive effect of shade was slowed down gradually and showed result that elevation of output shows finally.

Distribution of Photovoltaic Energy Including Topography Effect (지형 효과를 고려한 지표면 태양광 분포)

  • Jee, Joon-Bum;Zo, Il-Sung;Lee, Kyu-Tae;Choi, Young-Jean
    • Journal of the Korean earth science society
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    • v.32 no.2
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    • pp.190-199
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    • 2011
  • A photovoltaic energy map that included a topography effect on the Korean peninsula was developed using the Gangneung-Wonju National University (GWNU) solar radiation model. The satellites data (MODIS, OMI and MTSAT-1R) and output data from the Regional Data Assimilation Prediction System (RDAPS) model by the Korea Meteorological Administration (KMA) were used as input data for the GWNU model. Photovoltaic energy distributions were calculated by applying high resolution Digital Elevation Model (DEM) to the topography effect. The distributions of monthly accumulated solar energy indicated that differences caused by the topography effect are more important in winter than in summer because of the dependency on the solar altitude angle. The topography effect on photovoltaic energy is two times larger with 1 km resolution than with 4 km resolution. Therefore, an accurate calculation of the solar energy on the surface requires high-resolution topological data as well as high quality input data.

Operating Characteristics of 50kW Utility Interactive Photovoltaic System (조선대학교 기숙사전원용 50kW 태양광발전시스템 발전특성)

  • Park, Jeong-Min;Kim, Ji-Hun;Choi, Youn-Ok;Kim, Dae-Gon;Jang, Yong-He
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.720-722
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    • 2005
  • A photovoltaic panel is a device that, through the photovoltaic effect, converts luminous energy into electric energy. Photovoltaic generation system uses infinity of solar energy, cost of fuel is needless and there is no all pollution or waste occurrence. This paper summarizes the results of these efforts by offering a photovoltaic system structure in 50kW large scale applications installed In Chosun University dormitory roof. The status of PV 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 50kw utility PV system examination result

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Supply Method of Photovoltaic Equipment for Detached Houses Using Payback Period Analysis (투자비회수기간 분석에 의한 단독주택용 PV설비 보급방안)

  • Kang, Seok-Hwa;Kim, Jae-Yeob
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2014.05a
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    • pp.154-155
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    • 2014
  • Small photovoltaic equipment spreads to the detached house owing to the support of government. This study analyzed the payback period of small photovoltaic equipment, and presented a plan of spreading PV equipment by electricity consumption according to the results. The results of payback period analysis showed that a household of 500kWh or above in the average monthly electricity consumption could produce an economic effect without the subsidies of government, and a household of 300kWh or above could secure economical efficiency in case of receiving the subsidies of government and municipality. However, it was shown that the economic effect was not large in case of a household of less than 250kWh. Therefore, the analysis showed that it would be necessary to be supported by additional subsidies or to develop a new supporting policy with regard to a household of less than 250kWh.

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The Effect of Remodeling Replacement of Photovoltaic Power Generation System in Fish Farm : Analysis of Energy Saving Effect through Simulation (수조식 양식장의 태양광발전시스템 리모델링 교체 효과: 시뮬레이션을 통한 에너지절감효과 분석)

  • Choi, Hyunseok;Na, Jonghyuk;Lee, Hyunyoung;Noh, Jayeop
    • Current Photovoltaic Research
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    • v.9 no.1
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    • pp.11-16
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    • 2021
  • In the past, marine pollution caused by radioactivity and wastewater discharge caused mass destruction. As an alternative, the land farming system became common and operational. In recent years, safety and environmental problems caused by declining population due to aging of fishermen and underdeveloped facilities have always been lurking, so improvement is urgently needed. As part of the new renewable energy 3020 plan announced by the government in 2017, a new model was proposed to improve the environment as well as save energy when the roof of a water tank farm was remodeled into a solar power system. Study, when the existing roof was remodeled and replaced with a water tank farm in Busan as an empirical model, the energy saving rate was analyzed by comparing the actual electricity consumption and power generation.

Fabrication of an Optical Hydrogen Sensor Based on 3C-SiC Photovoltaic Effect and Its Characteristics (3C-SiC 광기전 특성 기반 광학식 수소센서의 제작과 그 특성)

  • Kim, Kang-San;Chung, Gwiy-Sang
    • Journal of Sensor Science and Technology
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    • v.21 no.4
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    • pp.283-286
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    • 2012
  • This paper presents the optical hydrogen sensor based on transparent 3C-SiC membrane and photovoltaic effect. Gasochromic materials of Pd and Pd/$WO_3$ were deposited by sputter on 3C-SiC membrane for gas sensing area. Gasochromic materials change to transparency by exposure to hydrogen. The variations of light intensity by hydrogen generate the photovoltaic of P-N junction between N-type 3C-SiC and P-type Si. Single layer of Pd shows higher photovoltaic compared with Pd/$WO_3$. However, phase transition from ${\alpha}$ to ${\beta}$ is shown at 6 %. Pd/$WO_3$ structure show the more linear response to hydrogen range of 2 % ~10 %. Also, almost 2 times fast response and recovery characteristics are shown at Pd/$WO_3$. These fast performances are come from the fact that Pd promoted the chemical reaction between hydrogen and $WO_3$.

Isoindigo Based Small Molecules for High-Performance Solution-Processed Organic Photovoltaic Devices

  • Elsawy, W.;Lee, C.L.;Cho, S.;Oh, S.H.;Moon, S.H.;Elbarbary, A.;Lee, Jae-Suk
    • Proceedings of the Korean Vacuum Society Conference
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    • 2013.08a
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    • pp.245.2-245.2
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    • 2013
  • Solution processed organic photovoltaic devices have relatively less attention compared to polymer photovoltaic devices even though they have high possibility to be developed because they have both advantages of polymer and organic, such as solution processable, no synthetic batch dependence of photovoltaic performance, high purity and high charge carrier mobility as well as relatively high efficiency (~7%). In addition, solution processed organic photovoltaic devices have an advantage of easiness to study the relationship between the molecular structure and photovoltaic performance due to its simple structure. In this work, five isoindigo based low band gap donor-acceptor-donor (D-A-D) small molecules with different electron donating strength were synthesized for investigating the relationship between the molecular structure and photovoltaic performance, especially, investigating the effects of different electron donating effect of donor group in isoindigo backbone to photovoltaic device performance. The variation of electron donating strength of donor group strongly affected the optical, thermal, electrochemical and photovoltaic device performances of isoindigo organic materials. The highest power conversion efficiency of ~3.2% was realized in bulk heterojuction photovoltaic device consisted of the ID3T as donor and PC70BM as acceptor. This work demonstrates the great potential of isoindigo moieties as electron deficient units as well as guideline for synthesis of donor-acceptor-donor (D-A-D) small molecules for realizing highly efficient solution processed organic photovoltaic devices.

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