scholarly journals Prediction of Solar Irradiance Based on Artificial Neural Networks

Inventions ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 45 ◽  
Author(s):  
Waleed I. Hameed ◽  
Baha A. Sawadi ◽  
Safa J. Al-Kamil ◽  
Mohammed S. Al-Radhi ◽  
Yasir I. A. Al-Yasir ◽  
...  
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Solar Irradiance ◽  
Open Circuit Voltage ◽  
Low Cost ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Pv Module ◽  
Artificial Neural

Prediction of solar irradiance plays an essential role in many energy systems. The objective of this paper is to present a low-cost solar irradiance meter based on artificial neural networks (ANN). A photovoltaic (PV) mathematical model of 50 watts and 36 cells was used to extract the short-circuit current and the open-circuit voltage of the PV module. The obtained data was used to train the ANN to predict solar irradiance for horizontal surfaces. The strategy was to measure the open-circuit voltage and the short-circuit current of the PV module and then feed it to the ANN as inputs to get the irradiance. The experimental and simulation results showed that the proposed method could be utilized to achieve the value of solar irradiance with acceptable approximation. As a result, this method presents a low-cost instrument that can be used instead of an expensive pyranometer.

scholarly journals Comparative Study of the Electrical Characteristics of Different Photovoltaic Modules in Outdoor Environment

2019 ◽  
Vol 9 (5) ◽  
pp. 4600-4604
Author(s):  
A. R. Jatoi ◽  
S. R. Samo ◽  
A. Q. Jakhrani
Keyword(s):  
Thin Film ◽  
Power Output ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Outdoor Environment ◽  
Electrical Characteristics ◽  
Pv Module ◽  
Yearly Average

The electrical characteristics of photovoltaic (PV) modules are affected by solar radiation and module temperature in outdoor environment. It was found that polycrystalline gained a yearly 0.50°C more average module temperature than monocrystalline. Non-crystalline amorphous modules got a yearly 0.83°C more average temperature than thin film modules. The attainment and release of module temperature was related with material properties of PV module technologies. The amorphous module gave 5.7%, 2.7% and 15.0% more yearly average open-circuit voltage than polycrystalline, monocrystalline and thin film modules. Besides that, the thin film modules gave 6.5% and 1.7%, 9.3% and 4.0%, and 11.3% and 8.8% more yearly average normalized short-circuit current and power output than polycrystalline, monocrystalline and thin film modules respectively. It was shown that the maximum annual average open-circuit voltage was given by amorphous modules and maximum short-circuit current and power output by thin film modules during the study period.

scholarly journals Performance of Solar Module with Presence of Two Types of Reflectors in Concentrator System

2019 ◽  
pp. 50-57
Keyword(s):  
Fossil Fuels ◽  
Open Circuit Voltage ◽  
Tracking System ◽  
Short Circuit ◽  
Average Daily Gain ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Solar Module ◽  
Pv Module ◽  
Daily Gain

Any work to improve the performance of the solar modules could add to their economic competitiveness against fossil fuels. In the present work the performance of PV solar module was improved by using V-Trough concentrator system (CPV) which moved by two axis tracking system. The concentrator consists of two flat reflectors of area 2 m2 for each one with geometric concentration ratio of 2X. To optimize the performance of the V-Trough CPV systems, two types of reflector material, Aluminum and mirror (glass coated by silver nitrate) were used. The results indicated that the temperature of PV reference module was higher than the ambient temperature by 27oC but there is too small difference in temperature between the tracking PV module with the reference which ranged to 2oC, while the temperature of the CPV system was higher than reference by 37oC. The temperature of the PV module under mirror reflectors was lower than module combined with Aluminum reflectors by 3oC. As a result of arising of the temperature of CPV system in compare with PV reference module, the open circuit voltage was droop by 0.7 V, 0.5 V for PV module under mirror and Aluminum reflectors respectively. The reflectors increased the short circuit current values by 2.1 A, 2.6 A for PV module combined with mirror and Aluminum reflectors respectively. Accordingly the performance (as an average daily gain of output power) of the PV solar module was improved by using V-Trough CPV system, 44%, 34% by using Aluminum and mirror reflectors respectively.

scholarly journals Chosen Aspects Of Investigations Of Solar Cells With The Laser Beam Induced Current Technique

2015 ◽  
Vol 22 (2) ◽  
pp. 241-250
Author(s):  
Łukasz Bartłomiej Chrobak ◽  
Wiesław Ryszard Madej ◽  
Mirosław Andrzej Maliński
Keyword(s):  
Solar Cells ◽  
Spectral Dependence ◽  
Open Circuit Voltage ◽  
Low Cost ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Spatial Distributions ◽  
Induced Current ◽  
Crystal Silicon

Abstract This paper presents maps of spatial distributions of the short circuit current Isc(x,y) and the open circuit voltage Uoc(x,y) of the investigated low cost solar cells. Visible differences in values of these parameters were explained by differences in the serial and shunt resistances determined for different points of solar cells from measurements of I–V characteristics. The spectral dependence of the photo voltage of solar cell is also shown, discussed and interpreted in the model of amorphous and crystal silicon.

scholarly journals Sun Irradiance Trappers For Solar PV Module To Operate On Maximum Power: An Experimental Study

2021 ◽  
Vol 12 (5) ◽  
pp. 1112-1121
Author(s):  
Ankur Kumar Gupta, Et. al.
Keyword(s):  
Experimental Study ◽  
Power Efficiency ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Sheet Thickness ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Maximum Output ◽  
Solar Pv ◽  
Pv Module

In this paper, an experimental investigation carries out on poly-crystalline photovoltaic (PV) system for performance enhancement with the help of a thin acrylic sheet (thickness- 2 mm). There are three types of systems used under this experimental setup as (i) PV module under normal conditions/ without sheet (ii) PV module under the triangular shape of the transparent sheet (iii) PV module under rectangular shape transparent sheet. The performance analysis of all three systems has been monitored in terms of open-circuit voltage, short circuit current, power, efficiency. Simultaneously, a statistical measurement approach of sun irradiation with constant temperature is carried out during the single day experimental study. The performance of the (Triangular shaped transparent sheet) TSTS configuration found superior which provide 22.064 Watt power at 12 am, whereas (Rectangular shaped transparent sheet) RSTS configuration provide 20.4 W at the same time. The TSTS configuration provides 1.12A short circuit current at 12 am, whereas RSTS configuration provides 1.02A short circuit current at the same time. The TSTS configuration provides 8.92% better value. The TSTS configuration provides 20V open-circuit voltage at 12 am, whereas RSTS configuration provides 19.8V open-circuit voltage at the same time. The TSTS configuration provides 1% higher value. So that the TSTS configuration provides the maximum output of the solar PV panel.

scholarly journals Fabrication and Optoelectrical Properties of IZO/Cu2OHeterostructure Solar Cells by Thermal Oxidation

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Cheng-Chiang Chen ◽  
Lung-Chien Chen ◽  
Yi-Hsuan Lee
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Low Cost ◽  
Short Circuit ◽  
Maximum Output Power ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Maximum Output ◽  
Indium Zinc Oxide

Indium zinc oxide (IZO)/cupper oxide (Cu2O) is a nontoxic nature and an attractive all-oxide candidate for low-cost photovoltaic (PV) applications. The present paper reports on the fabrication of IZO/Cu2O heterostructure solar cells which the Cu2O layers were prepared by oxidation of Cu thin films deposited on glass substrate. The measured parameters of cells were the short-circuit current (Isc), the open-circuit voltage (Voc), the maximum output power (Pm), the fill factor (FF), and the efficiency (η), which had values of 0.11 mA, 0.136 V, 5.05 μW, 0.338, and 0.56%, respectively, under AM 1.5 illumination.

scholarly journals Fabrication of Affordable and Sustainable Solar Cells Using NiO/TiO2 P-N Heterojunction

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Kingsley O. Ukoba ◽  
Freddie L. Inambao ◽  
Andrew C. Eloka-Eboka
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Spray Pyrolysis Technique ◽  
Low Cost ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Heterojunction Solar Cells

The need for affordable, clean, efficient, and sustainable solar cells informed this study. Metal oxide TiO2/NiO heterojunction solar cells were fabricated using the spray pyrolysis technique. The optoelectronic properties of the heterojunction were determined. The fabricated solar cells exhibit a short-circuit current of 16.8 mA, open-circuit voltage of 350 mV, fill factor of 0.39, and conversion efficiency of 2.30% under 100 mW/cm2 illumination. This study will help advance the course for the development of low-cost, environmentally friendly, and sustainable solar cell materials from metal oxides.

Online current-sensorless estimator for PV open circuit voltage and short circuit current

Solar Energy ◽  
2021 ◽  
Vol 213 ◽  
pp. 198-210
Author(s):  
Ahsan Nadeem ◽  
Hadeed Ahmed Sher ◽  
Ali Faisal Murtaza ◽  
Nisar Ahmed
Keyword(s):  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Current Sensorless

IMPROVING STABILITY OF CHLOROPHYLL AS NATURAL DYE FOR DYE-SENSITIZED SOLAR CELLS

2017 ◽  
Vol 80 (1) ◽  
Author(s):  
Zainal Arifin ◽  
Sudjito Soeparman ◽  
Denny Widhiyanuriyawan ◽  
Suyitno Suyitno ◽  
Argatya Tara Setyaji
Keyword(s):  
Current Density ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Natural Dyes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Natural dyes have attracted much researcher’s attention due to their low-cost production, simple synthesis processes and high natural abundance. However the dye-sensitized solar cells (DSSCs) based natural dyes have higher tendency to degradation. This article reports on the enhancement of performance and stability of dye-sensitized solar cells (DSSCs) using natural dyes. The natural dyes were extracted from papaya leaves by ethanol solvent at a temperature of 50 °C. Then the extracted dyes were isolated and modified into Mg-chlorophyll using column chromatography. Mg-chlorophyll was then synthesized into Fe-chlorophyll to improve stability. The natural dyes were characterized using ultraviolet-visible spectrometry, Fourier transform infrared spectroscopy, and cyclic voltammetry. The performance of DSSCs was tested using a solar simulator. The results showed the open-circuit voltage, the short-circuit current density, and the efficiency of the extracted papaya leaves-based DSSCs to be 325 mV, 0.36 mA/cm2, and 0.07%, respectively. Furthermore, the DSSCs with purified chlorophyll provide high open-circuit voltage of 425 mV and short-circuit current density of 0.45 mA/cm2. The use of Fe-chlorophyll for sensitizing the DSSCs increases the efficiency up to 2.5 times and the stability up to two times. The DSSCs with Fe-chlorophyll dyes provide open-circuit voltage, short-circuit current density, and efficiency of 500 mV, 0.62 mA/cm2, and 0.16%, respectively. Further studies to improve the current density and stability of natural dye-based DSSCs along with an improvement in the anchor between dyes and semiconducting layers are required.

scholarly journals Direct AFM-based nanoscale mapping and tomography of open-circuit voltages for photovoltaics

2018 ◽  
Vol 9 ◽  
pp. 1802-1808 ◽  
Author(s):  
Katherine Atamanuk ◽  
Justin Luria ◽  
Bryan D Huey
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Three Dimensional ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Photovoltaic Properties ◽  
Order Of Magnitude ◽  
Individual Grains

The nanoscale optoelectronic properties of materials can be especially important for polycrystalline photovoltaics including many sensor and solar cell designs. For thin film solar cells such as CdTe, the open-circuit voltage and short-circuit current are especially critical performance indicators, often varying between and even within individual grains. A new method for directly mapping the open-circuit voltage leverages photo-conducting AFM, along with an additional proportional-integral-derivative feedback loop configured to maintain open-circuit conditions while scanning. Alternating with short-circuit current mapping efficiently provides complementary insight into the highly microstructurally sensitive local and ensemble photovoltaic performance. Furthermore, direct open-circuit voltage mapping is compatible with tomographic AFM, which additionally leverages gradual nanoscale milling by the AFM probe essentially for serial sectioning. The two-dimensional and three-dimensional results for CdTe solar cells during in situ illumination reveal local to mesoscale contributions to PV performance based on the order of magnitude variations in photovoltaic properties with distinct grains, at grain boundaries, and for sub-granular planar defects.

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