Papers by Keyword: Photovoltaic Module

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Authors: Keh Moh Lin, Yang Hsien Lee, Wen Yeong Huang, Po Chun Hsu, Chin Yang Huang, Zhu Fu Hsieh
Abstract: To find out the important factors which decisively affect the soldering quality of photovoltaic modules, solar cells were soldered under different conditions (different temperatures, PbSn vs. SnAgCu solder, manual vs. semi-automatic). Experimental results show that the soldering quality of PbSn under 350°C in the semi-automatic soldering process was quite stable while the soldering quality of lead-free solder was generally unacceptable in the manual or semi-automatic process under different temperatures. This result indicates that the soldering process with lead-free solder still needs to be further improved. It was also found that most cracks were formed on the interface between the solder and the silver paste and then expanded outwards.
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Authors: Peng Yang, Chu Yan Shen, Wang Wang Shi
Abstract: Photovoltaic module is an important part of photovoltaic power generation, so the quality and reliability of Photovoltaic modules directly determine the whole (PV) power system’s stability. Design a JN5139 as control core based on the solar Photovoltaic modules of WSN sensor node. This paper firstly analyzes the sun batteries testing principle, then from two aspects of hardware and software this sensor node in detail, including hardware JN5139 timing acquisition by the output of solar cell piece voltage, current and bypass the diode loop current, judge battery slice of actual work; Software from main program respectively, AD son conversion program, etc are introduced. With the data of experiment collecting, the node is analyzed and evaluated.
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Authors: A.O. Adelaja, S.J. Ojolo
Abstract: The photovoltaic (pv) forced convection solar dryer comprises the solar collector, dryer and pv assemblies. It is designed for a continuous operation throughout the day. The direct solar irradiation is utilized during sunshine hours and it automatically switches power supply to the battery during cloud covers and non-insolation periods. The inclusion of a heat reservoir enables heat transfer to continue during this period. In this study, thermal and dryer analyses were done. Experimental investigations were carried out to evaluate the performance of the system by drying plantain chips. The useful power collected was found to be, 391.50W, collector efficiency, 65.6%, dryer efficiency, 39.6%, average drying rate during insolation, 0.0169kg/hr and total drying time was 23 hours. The maximum temperature attained was 55oC. The average drying non insolation period was 0.0112kg/hr. The capital cost is less than $350.
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Authors: Eva Paraskevadaki, S. Papathanassiou, Georgios Vokas
Abstract: Photovoltaic system performance is influenced by a variety of factors such as irradiance, temperature, shading, degradation, mismatch losses, soiling, etc. Especially shading, complete or partial, can have a significant contribution to the reduction of power output, depending mainly on the PV array configuration, the shading pattern and the existence of bypass diodes incorporated in the PV module design. In order to obtain the maximum power from a PV generator, it is of great importance to evaluate the complex effects of shading on the P-V and I-V curves.
391
Authors: Y. Baradey, Mohammad Nurul Alam Hawlader, M. Idres, S.I. Ihsan
Abstract: Photovoltaic systems have become recently the most attractive and promising technology compared with other solar energy conversion devices. Solar energy reaches the earth’s surface in wavelengths between 0.300 and 2.50 μm. Silicon based photovoltaic systems convert only the wavelength between 0.35 to 0.82 μm of solar energy to electricity. The rest of incident solar radiation will be converted to heat, which will increase the operating temperature of the device and decrease the output power and efficiency. Maintaining the operating temperature of the PV systems at low and desired value was the main emphasis of different researches through the last decades. In this research, a special transparent glass cover (STGC) was used in order to cool down the photovoltaic module and, therefore, increase the output power and the efficiency of the module. The result showed that STGC led to 2.75% improvement in open circuit voltage, 9.6% increase in short circuit current, 26.4% increase in the output power, and 3% increase in the efficiency of the module.
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Authors: Jin Chuan Teo, Rodney H.G. Tan, V.H. Mok
Abstract: This paper presents the investigation of partial shading characteristics of mono-crystalline and poly-crystalline photovoltaic module connected in series. Simulink models are developed to assist the investigation to determine the ideality factor for mono-crystalline and poly-crystalline photovoltaic module. Commercially available mono-crystalline and poly-crystalline photovoltaic module are used to extract measurable parameters for the model to study the behaviour of I-V curve. Measurements have been conducted for the investigation including mono-crystalline only, poly-crystalline only, both unshaded, mono-crystalline shaded and poly-crystalline shaded. This paper contributes to the understanding of partial shading characteristics of different materials presence in photovoltaic string.
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Authors: Vladimir Sokolovsky, Victor Meerovich, Shaul Goren, Lidia Chubraeva, Istvan Vajda
Abstract: It was experimentally shown that joint application of a solar station and a superconducting flywheel (a kinetic energy storage device) can solve the main problem of renewable energy sources: to provide uninterrupted and controlled power supplying. The storage device changes its operation mode (stand-by, charging, discharging) practically without any delay and its use leads to an increase of the transient stability of a power system.
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Authors: Cătălin Alexandru
Abstract: The paper presents the modeling and simulation of the mechatronic tracking system used for a photovoltaic module. The mechanical model of the sun tracker is developed by using the MBS environment ADAMS, while the DFC software EASY5 is used for the control system design. The study is approached in concurrent engineering concept, integrating the mechanical and control models at the virtual prototype level. The main task of the design refers to the energetic efficiency, by maximizing the energetic gain (i.e. the solar input), and minimizing the energy consumption for performing the tracking. The design of the motion law is focused on determining the optimal actuating times, considering the energetic efficiency as design objective for the optimization.
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Authors: Monica Alina Ionită, Cătălin Alexandru
Abstract: Increasing the conversion efficiency of the solar energy into electricity is one of the most addressed topics in the field of renewable energy systems. In this paper, the pseudo-azimuthal tracking mechanism for a PV platform it was selected for presentation. The study is focused on the optimization of the mechanical device model of the tracking mechanism (developed with the MBS software environment ADAMS of MSC). The optimization is based on the parametrization of the model by using the design points that define the locations of the geometric constraints (i.e. the joints). The objective of the optimization is to minimize the motor force developed by the driving source, which is a linear actuator. In addition, a design constraint is used to limit (restrict) the value of the pressure angle. The optimization study leads to the minimization of the energetic consumption during tracking, with positive effect on the energy balance of the photovoltaic system with sun tracker.
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Authors: Ye Feng Liu, Qiang Su, Hua Zhang, Cao Ping Cai
Abstract: Hydrogen fuel produced by photovoltaic-eletrolyzer system is a solution to solve problem of global warming, air pollution and fossil fuel crisis. The efficiency of photovoltaic-electrolyzer system can be promoted by the optimal matching between photovoltaic modules and electrolyzer. Based on experimental test and mathematical model, a certain series–parallel connection of photovoltaic cells is determined to match with electrolyzer. The aim is to match the voltage and the maximum power output of the photovoltaic modules to the operating voltage of the electrolyzer. So some auxiliaries such as DC-DC converter, maximum power point (MPP) tracking unit can be omitted. Therefore, the cost and resistances in the circuit are greatly reduced.
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