Design and implementation of RELab system to study the solar and wind energy

Cotfas, Petru A.; Cotfas, Daniel T.

doi:10.1016/j.measurement.2016.06.060

Cited by 20 publications

(10 citation statements)

References 23 publications

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“…The I-V characteristics of the photovoltaic cells were measured using the SolarLab system developed by the authors [27] (see Figure 2).…”

Section: Experimental Set-upmentioning

confidence: 99%

“…The SolarLab software is used to control the measurement system, to make the data acquisition, and it has modules implemented to determine the important parameters of the photovoltaic cells using different methods developed by researchers [10,27]. The software application was created in the graphical programming language LabVIEW, and its interface is presented in Figure 3…”

Section: Experimental Set-upmentioning

confidence: 99%

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Study of Temperature Coefficients for Parameters of Photovoltaic Cells

Cotfas

Machidon

2018

International Journal of Photoenergy

115

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The temperature is one of the most important factors which affect the performance of the photovoltaic cells and panels along with the irradiance. The current voltage characteristics, I-V, are measured at different temperatures from 25°C to 87°C and at different illumination levels from 400 to 1000 W/m2, because there are locations where the upper limit of the photovoltaic cells working temperature exceeds 80°C. This study reports the influence of the temperature and the irradiance on the important parameters of four commercial photovoltaic cell types: monocrystalline silicon—mSi, polycrystalline silicon—pSi, amorphous silicon—aSi, and multijunction InGaP/InGaAs/Ge (Emcore). The absolute and normalized temperature coefficients are determined and compared with their values from the related literature. The variation of the absolute temperature coefficient function of the irradiance and its significance to accurately determine the important parameters of the photovoltaic cells are also presented. The analysis is made on different types of photovoltaics cells in order to understand the effects of technology on temperature coefficients. The comparison between the open-circuit voltage and short-circuit current was also performed, calculated using the temperature coefficients, determined, and measured, in various conditions. The measurements are realized using the SolarLab system, and the photovoltaic cell parameters are determined and compared using the LabVIEW software created for SolarLab system.

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“…The I-V characteristics of the photovoltaic cells were measured using the SolarLab system developed by the authors [27] (see Figure 2).…”

Section: Experimental Set-upmentioning

confidence: 99%

Section: Experimental Set-upmentioning

confidence: 99%

Study of Temperature Coefficients for Parameters of Photovoltaic Cells

Cotfas

Machidon

2018

International Journal of Photoenergy

115

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“…X-ray diffraction is an analytic technique which offers structural and chemical information about the crystallography of a range of various materials [25], such as the crystallographic structure of the material, structural analysis of the material, surface analysis of the material, analysis of thin layers, and transformation due to the influence of temperature (see Figures 4 and 5) [25][26][27]. Graphics data processing was made by the representation of data acquired using a D8 DISCOVER diffractometer, Bruker AXS GmbH.…”

Section: Experimental Setup and Methodologymentioning

confidence: 99%

“…International Journal of Photoenergy photovoltaic cells' efficiency [13][14][15][16][17][18][19][20][21]. Measurements made on the photovoltaic solar cell were realised in laboratory conditions on the NI-ELVIS platform produced by National Instruments (see Figure 6) [26,27].…”

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confidence: 99%

Determination of Technological Features of a Solar Photovoltaic Cell Made of Monocrystalline Silicon P⁺PNN⁺

Fluieraru

Predușcă

Andrei

et al. 2019

International Journal of Photoenergy

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The development in the field of semiconductor materials and electronic devices has a great impact on systems with renewable energy sources. Determination of the functional parameters of photovoltaic solar cells is essential for the subsequent usage of these semiconductor devices. Research was made on type P+PNN+ monocrystalline silicon wafers. Crystallographic measurements of the photovoltaic solar cell were made by means of FESEM-FIB Auriga Workstation. Initial data were selected from the study of models found in the specialized literature. The experimental results were compared to classical mathematical models. Measurements made on the photovoltaic solar cell were realised in laboratory conditions on the NI-ELVIS platform produced by National Instruments.

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“…The influence of the irradiance level on the temperature coefficients is also estimated, and the results are compared to previous literature. The tests are performed under single cells or small modules using the custom laboratory equipment described in a previous paper, 27 which can use an artificial light source or natural sunlight. A comparison among the values determined for β by referring to the same type of cells reveals that there is a significant coherence.…”

Section: State Of the Artmentioning

confidence: 99%

Temperature coefficients of degraded crystalline silicon photovoltaic modules at outdoor conditions

Piliougine

Oukaja

Sidrach‐de‐Cardona

et al. 2021

Progress in Photovoltaics

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The temperature effect on photovoltaic modules is usually quantified by means of some coefficients relating the variations of the open‐circuit voltage, of the short‐circuit current, and of the maximum power to temperature changes. In this paper, comprehensive experimental guidelines to estimate the temperature coefficients when measurements are performed outdoors are given. In addition, a correction procedure is applied to the short‐circuit current to cancel out the influence of the fluctuations in the irradiance level. The experimental results shown in this paper refer to several single‐crystalline silicon modules that have been operating for 21 years. Consequently, the estimated values of the temperature coefficients also account for module ageing processes. The coefficients of determination achieved in the case of the temperature coefficients of the open‐circuit voltage and the maximum power are very close to one. Results concerning the temperature coefficients of the short‐circuit current are also suitable if they are previously corrected.

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Design and implementation of RELab system to study the solar and wind energy

Cited by 20 publications

References 23 publications

Study of Temperature Coefficients for Parameters of Photovoltaic Cells

Study of Temperature Coefficients for Parameters of Photovoltaic Cells

Determination of Technological Features of a Solar Photovoltaic Cell Made of Monocrystalline Silicon P⁺PNN⁺

Temperature coefficients of degraded crystalline silicon photovoltaic modules at outdoor conditions

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Design and implementation of RELab system to study the solar and wind energy

Cited by 20 publications

References 23 publications

Study of Temperature Coefficients for Parameters of Photovoltaic Cells

Study of Temperature Coefficients for Parameters of Photovoltaic Cells

Determination of Technological Features of a Solar Photovoltaic Cell Made of Monocrystalline Silicon P+PNN+

Temperature coefficients of degraded crystalline silicon photovoltaic modules at outdoor conditions

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Determination of Technological Features of a Solar Photovoltaic Cell Made of Monocrystalline Silicon P⁺PNN⁺