The Experts below are selected from a list of 46161 Experts worldwide ranked by ideXlab platform
Hideyuki Takakura - One of the best experts on this subject based on the ideXlab platform.
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estimation of irradiance and outdoor performance of photovoltaic Modules by meteorological data
Solar Energy Materials and Solar Cells, 2011Co-Authors: Naoyasu Katsumata, Takashi Minemoto, Yasuhito Nakada, Hideyuki TakakuraAbstract:Abstract Three environmental factors of irradiance, solar spectral distribution and Module Temperature greatly affect the performances of photovoltaic (PV) Modules. If the environmental factors can be estimated by basic meteorological data (BMD) announced by an official organization in various areas, the performances of PV Modules can be estimated easily. In this study, a relationship between the environmental factors and the BMD was analyzed. The performances of Si-based (crystalline Si and thin-film Si) PV Modules were estimated by the relationship. As a result, errors between the estimation and actual performances in the crystalline Si and thin-film PV Modules were within 1.88% and 0.58% in Kusatsu city, Japan (34°58′N, 135°57′E). This methodology can be useful for rating the performance of PV Modules at various areas.
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difference in the outdoor performance of bulk and thin film silicon based photovoltaic Modules
Solar Energy Materials and Solar Cells, 2009Co-Authors: Takashi Minemoto, Shunichi Fukushige, Hideyuki TakakuraAbstract:Differences in the outdoor performances of bulk (multi- and single-crystalline Si) and thin-film (amorphous Si(a-Si), a-Si/micro-crystalline Si and a-Si/a-SiGe/a-SiGe) photovoltaic (PV) Modules are analyzed. The influence of Module Temperature and solar spectrum distribution on the PV output is clarified. The PV outputs almost only depend on Module Temperature in bulk-type Si PV Modules while that depend both Module Temperature and spectrum distribution in thin-film ones. Also, the PV outputs of the bulk-type Si PV Modules at most frequent condition at outdoor are lower than that at the standard test condition; in contrast, it was the other way round for thin-film ones.
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analysis of the Temperature history of amorphous silicon photovoltaic Module outdoors
Solar Energy Materials and Solar Cells, 2009Co-Authors: Shunichi Fukushige, Takashi Minemoto, Kyoko Ichida, Hideyuki TakakuraAbstract:To analyze the effects of the Module Temperature and irradiance on photovoltaic (PV) Modules outdoors, contour graphs were made for the performance ratio (PR) of single-crystalline Si (sc-Si) and amorphous Si (a-Si) PV Modules. The result shows that the PR of the sc-Si PV Module decreases with increase in Module Temperature. In contrast, the PR of the a-Si PV Module shows unique Temperature dependence influenced by Temperature history. Dependence of environmental factors of the PR of the a-Si PV Module was analyzed in almost the same Temperature seasons, i.e., Spring and Fall. The PR in Fall was higher than that in Spring. The result shows that the recovered performance in summer may continue for Fall. The contour graph of remainder of PR in Fall and Spring was made. The environmental condition that the PR in Fall was higher was clarified.
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seasonal variation analysis of the outdoor performance of amorphous si photovoltaic Modules using the contour map
Solar Energy Materials and Solar Cells, 2009Co-Authors: Yasuhito Nakada, Takashi Minemoto, Shunichi Fukushige, Hideyuki TakakuraAbstract:Abstract The effects of Module Temperature ( T mod ) and spectral irradiance distribution on the outdoor performance of amorphous Si (a-Si) photovoltaic (PV) Modules were investigated using contour maps. Compared to PV Modules based on crystalline Si, such as single-crystalline Si (sc-Si) and multicrystalline Si, a-Si PV Modules exhibit complex behavior with seasonal variation. In this study, we statistically analyzed the outdoor performance of a-Si and sc-Si PV Modules. The influence of environmental factors on outdoor performance of a-Si PV Modules was analyzed for two seasons, spring and autumn, in which the data periods had nearly the same average T mod and integrated irradiation. The outdoor performance of the a-Si PV Module depends on both Temperature history and light-induced degradation.
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impact of spectral irradiance distribution and Temperature on the outdoor performance of amorphous si photovoltaic Modules
Solar Energy Materials and Solar Cells, 2007Co-Authors: Takashi Minemoto, Shingo Nagae, Hideyuki TakakuraAbstract:Performance of photovoltaic (PV) Modules is evaluated under the standard test condition, which rarely meets actual outdoor conditions. Environmental conditions greatly affect the output energy of PV Modules. The impact of environmental factors, especially solar spectrum distribution and Module Temperature, on the outdoor performance of amorphous Si (a-Si) and multicrystalline Si (mc-Si) PV Modules is characterized. The results show that the output energy of a-Si Modules mainly depends on spectrum distribution and is higher under blue-rich spectrum. In contrast, the output energy of mc-Si Module is sensitive to Module Temperature but not to spectrum distribution.
Takashi Minemoto - One of the best experts on this subject based on the ideXlab platform.
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estimation of irradiance and outdoor performance of photovoltaic Modules by meteorological data
Solar Energy Materials and Solar Cells, 2011Co-Authors: Naoyasu Katsumata, Takashi Minemoto, Yasuhito Nakada, Hideyuki TakakuraAbstract:Abstract Three environmental factors of irradiance, solar spectral distribution and Module Temperature greatly affect the performances of photovoltaic (PV) Modules. If the environmental factors can be estimated by basic meteorological data (BMD) announced by an official organization in various areas, the performances of PV Modules can be estimated easily. In this study, a relationship between the environmental factors and the BMD was analyzed. The performances of Si-based (crystalline Si and thin-film Si) PV Modules were estimated by the relationship. As a result, errors between the estimation and actual performances in the crystalline Si and thin-film PV Modules were within 1.88% and 0.58% in Kusatsu city, Japan (34°58′N, 135°57′E). This methodology can be useful for rating the performance of PV Modules at various areas.
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difference in the outdoor performance of bulk and thin film silicon based photovoltaic Modules
Solar Energy Materials and Solar Cells, 2009Co-Authors: Takashi Minemoto, Shunichi Fukushige, Hideyuki TakakuraAbstract:Differences in the outdoor performances of bulk (multi- and single-crystalline Si) and thin-film (amorphous Si(a-Si), a-Si/micro-crystalline Si and a-Si/a-SiGe/a-SiGe) photovoltaic (PV) Modules are analyzed. The influence of Module Temperature and solar spectrum distribution on the PV output is clarified. The PV outputs almost only depend on Module Temperature in bulk-type Si PV Modules while that depend both Module Temperature and spectrum distribution in thin-film ones. Also, the PV outputs of the bulk-type Si PV Modules at most frequent condition at outdoor are lower than that at the standard test condition; in contrast, it was the other way round for thin-film ones.
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analysis of the Temperature history of amorphous silicon photovoltaic Module outdoors
Solar Energy Materials and Solar Cells, 2009Co-Authors: Shunichi Fukushige, Takashi Minemoto, Kyoko Ichida, Hideyuki TakakuraAbstract:To analyze the effects of the Module Temperature and irradiance on photovoltaic (PV) Modules outdoors, contour graphs were made for the performance ratio (PR) of single-crystalline Si (sc-Si) and amorphous Si (a-Si) PV Modules. The result shows that the PR of the sc-Si PV Module decreases with increase in Module Temperature. In contrast, the PR of the a-Si PV Module shows unique Temperature dependence influenced by Temperature history. Dependence of environmental factors of the PR of the a-Si PV Module was analyzed in almost the same Temperature seasons, i.e., Spring and Fall. The PR in Fall was higher than that in Spring. The result shows that the recovered performance in summer may continue for Fall. The contour graph of remainder of PR in Fall and Spring was made. The environmental condition that the PR in Fall was higher was clarified.
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seasonal variation analysis of the outdoor performance of amorphous si photovoltaic Modules using the contour map
Solar Energy Materials and Solar Cells, 2009Co-Authors: Yasuhito Nakada, Takashi Minemoto, Shunichi Fukushige, Hideyuki TakakuraAbstract:Abstract The effects of Module Temperature ( T mod ) and spectral irradiance distribution on the outdoor performance of amorphous Si (a-Si) photovoltaic (PV) Modules were investigated using contour maps. Compared to PV Modules based on crystalline Si, such as single-crystalline Si (sc-Si) and multicrystalline Si, a-Si PV Modules exhibit complex behavior with seasonal variation. In this study, we statistically analyzed the outdoor performance of a-Si and sc-Si PV Modules. The influence of environmental factors on outdoor performance of a-Si PV Modules was analyzed for two seasons, spring and autumn, in which the data periods had nearly the same average T mod and integrated irradiation. The outdoor performance of the a-Si PV Module depends on both Temperature history and light-induced degradation.
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impact of spectral irradiance distribution and Temperature on the outdoor performance of amorphous si photovoltaic Modules
Solar Energy Materials and Solar Cells, 2007Co-Authors: Takashi Minemoto, Shingo Nagae, Hideyuki TakakuraAbstract:Performance of photovoltaic (PV) Modules is evaluated under the standard test condition, which rarely meets actual outdoor conditions. Environmental conditions greatly affect the output energy of PV Modules. The impact of environmental factors, especially solar spectrum distribution and Module Temperature, on the outdoor performance of amorphous Si (a-Si) and multicrystalline Si (mc-Si) PV Modules is characterized. The results show that the output energy of a-Si Modules mainly depends on spectrum distribution and is higher under blue-rich spectrum. In contrast, the output energy of mc-Si Module is sensitive to Module Temperature but not to spectrum distribution.
Manoj Kumar - One of the best experts on this subject based on the ideXlab platform.
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real time analysis of low concentration photovoltaic systems a review towards development of sustainable energy technology
Renewable & Sustainable Energy Reviews, 2013Co-Authors: Pankaj Yadav, Brijesh Tripathi, Siddharth Rathod, Manoj KumarAbstract:Abstract This article explores the potential of 1 kW P low-concentration photovoltaic (LCPV) system for commercial purposes. Real-time analysis of in-house developed LCPV system shows better performance than the flat panel PV systems. Under actual test conditions (ATC), the open-circuit voltage ( V OC ) decreases with Temperature coefficient of voltage ≈−0.061 V/K. The dynamic resistance is found to have a positive coefficient of Module Temperature i.e., dr d / dT ≈0.49 Ω/K. The annual energy generation of 1 kW P LCPV power plant is envisaged as 1747.2 kW h/kW P while the annual average daily final yield, reference yield and array yield were 3.76, 5.09 and 4.29 h/day, respectively. The annual average daily performance ratio and capacity factor are 72% and 14%, respectively. The annual average daily system losses and capture losses are 0.57 and 0.80 h/day correspondingly.
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Estimation of steady state and dynamic parameters of low concentration photovoltaic system
Solar Energy Materials and Solar Cells, 2013Co-Authors: Pankaj Yadav, Brijesh Tripathi, Makarand M. Lokhande, Manoj KumarAbstract:Abstract The estimation of steady state and dynamic parameters is indispensable to extract maximum power from solar photovoltaic system. This article aims to extract steady state and dynamic parameters for a low-concentration photovoltaic system under actual test conditions. A theoretical model is reported to estimate dynamic resistance under varying concentration and Temperature for low-concentration photovoltaic system. When the concentration ratio is changed from 1 sun to 5.17 suns the maximum power delivered by low-concentration photovoltaic system increased by threefold. The results show that the higher solar PV Module Temperature has negative impact on the open circuit voltage for a given concentration with negative Temperature coefficient of ≈−0.021 V/K. The observed dynamic resistance was in the range of 17.99 to 24.84 Ω for the low-concentration photovoltaic system under actual test conditions.
Shunichi Fukushige - One of the best experts on this subject based on the ideXlab platform.
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difference in the outdoor performance of bulk and thin film silicon based photovoltaic Modules
Solar Energy Materials and Solar Cells, 2009Co-Authors: Takashi Minemoto, Shunichi Fukushige, Hideyuki TakakuraAbstract:Differences in the outdoor performances of bulk (multi- and single-crystalline Si) and thin-film (amorphous Si(a-Si), a-Si/micro-crystalline Si and a-Si/a-SiGe/a-SiGe) photovoltaic (PV) Modules are analyzed. The influence of Module Temperature and solar spectrum distribution on the PV output is clarified. The PV outputs almost only depend on Module Temperature in bulk-type Si PV Modules while that depend both Module Temperature and spectrum distribution in thin-film ones. Also, the PV outputs of the bulk-type Si PV Modules at most frequent condition at outdoor are lower than that at the standard test condition; in contrast, it was the other way round for thin-film ones.
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analysis of the Temperature history of amorphous silicon photovoltaic Module outdoors
Solar Energy Materials and Solar Cells, 2009Co-Authors: Shunichi Fukushige, Takashi Minemoto, Kyoko Ichida, Hideyuki TakakuraAbstract:To analyze the effects of the Module Temperature and irradiance on photovoltaic (PV) Modules outdoors, contour graphs were made for the performance ratio (PR) of single-crystalline Si (sc-Si) and amorphous Si (a-Si) PV Modules. The result shows that the PR of the sc-Si PV Module decreases with increase in Module Temperature. In contrast, the PR of the a-Si PV Module shows unique Temperature dependence influenced by Temperature history. Dependence of environmental factors of the PR of the a-Si PV Module was analyzed in almost the same Temperature seasons, i.e., Spring and Fall. The PR in Fall was higher than that in Spring. The result shows that the recovered performance in summer may continue for Fall. The contour graph of remainder of PR in Fall and Spring was made. The environmental condition that the PR in Fall was higher was clarified.
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seasonal variation analysis of the outdoor performance of amorphous si photovoltaic Modules using the contour map
Solar Energy Materials and Solar Cells, 2009Co-Authors: Yasuhito Nakada, Takashi Minemoto, Shunichi Fukushige, Hideyuki TakakuraAbstract:Abstract The effects of Module Temperature ( T mod ) and spectral irradiance distribution on the outdoor performance of amorphous Si (a-Si) photovoltaic (PV) Modules were investigated using contour maps. Compared to PV Modules based on crystalline Si, such as single-crystalline Si (sc-Si) and multicrystalline Si, a-Si PV Modules exhibit complex behavior with seasonal variation. In this study, we statistically analyzed the outdoor performance of a-Si and sc-Si PV Modules. The influence of environmental factors on outdoor performance of a-Si PV Modules was analyzed for two seasons, spring and autumn, in which the data periods had nearly the same average T mod and integrated irradiation. The outdoor performance of the a-Si PV Module depends on both Temperature history and light-induced degradation.
Bill Marion - One of the best experts on this subject based on the ideXlab platform.
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current voltage curve translation by bilinear interpolation
Progress in Photovoltaics, 2004Co-Authors: Bill Marion, Silvia Rummel, A AnderbergAbstract:By means of bilinear interpolation and four reference current-voltage (I-V) curves, an I-V curve of a photovoltaic (PV) Module is translated to desired conditions of irradiance and PV Module Temperature. The four reference I-V curves are measured at two irradiance and two PV Module Temperature levels and contain all the essential PV Module characteristic information for performing the bilinear interpolation. The interpolation is performed first with respect to open-circuit voltage to account for PV Module Temperature, and second with respect to short-circuit current to account for irradiance. The translation results over a wide range of irradiances and PV Module Temperatures agree closely with measured values for a group of PV Modules representing seven different technologies. Root-mean-square errors were 1.5% or less for the I-V curve parameters of maximum power, voltage at maximum power, current at maximum power, short-circuit current, and open-circuit voltage. The translation is applicable for determining the performance of a PV Module for a specified test condition, or for PV system performance modeling.
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a method for modeling the current voltage curve of a pv Module for outdoor conditions
Progress in Photovoltaics, 2002Co-Authors: Bill MarionAbstract:A method has been developed for modeling the current-voltage curve of a photovoltaic (PV) Module for outdoor conditions. An indoor characterization procedure determines a PV Module's Temperature and irradiance correction factors, which are used in conjunction with equations to translate a reference curve to outdoor conditions of PV Module Temperature and irradiance. A PV technology's spectral response characteristics are accommodated in the equation for irradiance. The modeled and measured energy is compared for a one-year period for seven PV Modules of different technologies. The results validate the method's use for modeling the hourly performance of PV Modules, and for modeling daily energy production for PV Module energy rating purposes.
