scholarly journals Understanding the energy yield of photovoltaic modules in different climates by linear performance loss analysis of the module performance ratio

2017 ◽  
Vol 11 (5) ◽  
pp. 558-565 ◽  
Author(s):  
Markus Schweiger ◽  
Werner Herrmann ◽  
Andreas Gerber ◽  
Uwe Rau
Keyword(s):  
Performance Ratio ◽  
Energy Yield ◽  
Photovoltaic Modules ◽  
Loss Analysis ◽  
Performance Loss ◽  
Module Performance ◽  
Different Climates

scholarly journals Thermal and electrical energy yield analysis of a directly water cooled photovoltaic module

2016 ◽  
Vol 20 (1) ◽  
pp. 155-163
Author(s):  
Busiso Mtunzi ◽  
Edson Meyer ◽  
Simon Michael
Keyword(s):  
High Performance ◽  
Electrical Power ◽  
Electrical Energy ◽  
Performance Ratio ◽  
Photovoltaic Module ◽  
Energy Yield ◽  
Photovoltaic Modules ◽  
Utility Company ◽  
Electrical Power Output ◽  
Font Color

Electrical energy of photovoltaic modules drops by 0.5% for each degree increase in temperature. Direct water cooling of photovoltaic modules was found to give improved electrical and thermal yield. A prototype was put in place to analyse the field data for a period of a year. The results showed an initial high performance ratio and electrical power output. The monthly energy saving efficiency of the directly water cooled module was found to be approximately 61%. The solar utilisation of the naturally cooled photovoltaic module was found to be 8.79% and for the directly water cooled module its solar utilisation was 47.93%. Implementation of such systems on households may reduce the load from the utility company, bring about huge savings on electricity bills and help in reducing carbon emissions. <br><br><font color="red"><b> This article has been retracted. Link to the retraction <u><a href="http://dx.doi.org/10.2298/TSCI160407082E">10.2298/TSCI160407082E</a><u></b></font>

scholarly journals A Simple Mismatch Mitigating Partial Power Processing Converter for Solar PV Modules

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2308
Author(s):  
Kamran Ali Khan Niazi ◽  
Yongheng Yang ◽  
Tamas Kerekes ◽  
Dezso Sera
Keyword(s):  
Experimental Tests ◽  
Energy Yield ◽  
Power Electronic ◽  
Solar Pv ◽  
Partial Shading ◽  
Loss Analysis ◽  
Pv Systems ◽  
Pv Module ◽  
Pv Modules ◽  
In Series

Partial shading affects the energy harvested from photovoltaic (PV) modules, leading to a mismatch in PV systems and causing energy losses. For this purpose, differential power processing (DPP) converters are the emerging power electronic-based topologies used to address the mismatch issues. Normally, PV modules are connected in series and DPP converters are used to extract the power from these PV modules by only processing the fraction of power called mismatched power. In this work, a switched-capacitor-inductor (SCL)-based DPP converter is presented, which mitigates the non-ideal conditions in solar PV systems. A proposed SCL-based DPP technique utilizes a simple control strategy to extract the maximum power from the partially shaded PV modules by only processing a fraction of the power. Furthermore, an operational principle and loss analysis for the proposed converter is presented. The proposed topology is examined and compared with the traditional bypass diode technique through simulations and experimental tests. The efficiency of the proposed DPP is validated by the experiment and simulation. The results demonstrate the performance in terms of higher energy yield without bypassing the low-producing PV module by using a simple control. The results indicate that achieved efficiency is higher than 98% under severe mismatch (higher than 50%).

Correlation of UV Fluorescence Images With Performance Loss of Field-Retrieved Photovoltaic Modules

2021 ◽  
pp. 1-10
Author(s):  
Fang Li ◽  
Viswa Sai Pavan Buddha ◽  
Eric J. Schneller ◽  
Nafis Iqbal ◽  
Dylan J. Colvin ◽  
...  
Keyword(s):  
Photovoltaic Modules ◽  
Uv Fluorescence ◽  
Performance Loss ◽  
Fluorescence Images

scholarly journals A study on the reliability and performance of solar powered street lighting systems

2017 ◽  
Vol 5 (2) ◽  
pp. 110 ◽  
Author(s):  
Adebayo Fashina ◽  
Salifu Azeko ◽  
Joseph Asare ◽  
Chukwuemeka Ani ◽  
Vitalis Anye ◽  
...  
Keyword(s):  
Performance Indicators ◽  
Performance Ratio ◽  
Energy Yield ◽  
Street Lighting ◽  
Technical Performance ◽  
Humid Environment ◽  
Total Failure ◽  
Lighting Systems ◽  
And Performance ◽  
Solar Powered

This paper presents the results of a study on the reliability and performance of the solar-powered street lighting systems installed at the African University of Science and Technology (AUST) in Nigeria, a hot and humid environment. The technical performance of the systems was studied using the following performance indicators: system energy yield, capture loss, as well as the system performance ratio while the reliability of the systems was examined using a model developed from the findings from the maintenance and fault diagnosis of the systems. The model was used to predict the total failure and survival probability of the systems using the Weibull distribution. The performance evaluation during the monitored period (February 2012 to January 2015) indicated that the performance ratios of the systems vary from 70% to 89% and the energy yields of the systems ranging from 2.87 h/day to 5.57 h/day. The results from the reliability analysis also showed that when the stress concentration factor around the notch between the cable terminals in the charge controller increases, the charge controller will become overheated, which in turn affected other components of the systems. The implications of this study are also discussed for the design and development of future solar-powered street lighting systems.

scholarly journals Outdoor Performance Test of Bifacial n-Type Silicon Photovoltaic Modules

2019 ◽  
Vol 11 (22) ◽  
pp. 6234 ◽  
Author(s):  
Hyeonwook Park ◽  
Sungho Chang ◽  
Sanghwan Park ◽  
Woo Kyoung Kim
Keyword(s):  
Tilt Angle ◽  
Performance Test ◽  
Power Production ◽  
Energy Yield ◽  
Concrete Floor ◽  
Photovoltaic Modules ◽  
Pv Module ◽  
Pv Modules ◽  
Solar Tracker ◽  
One Year

The outdoor performance of n-type bifacial Si photovoltaic (PV) modules and string systems was evaluated for two different albedo (ground reflection) conditions, i.e., 21% and 79%. Both monofacial and bifacial silicon PV modules were prepared using n-type bifacial Si passivated emitter rear totally diffused cells with multi-wire busbar incorporated with a white and transparent back-sheet, respectively. In the first set of tests, the power production of the bifacial PV string system was compared with the monofacial PV string system installed on a grey concrete floor with an albedo of ~21% for approximately one year (June 2016–May 2017). In the second test, the gain of the bifacial PV string system installed on the white membrane floor with an albedo of ~79% was evaluated for approximately ten months (November 2016–August 2017). During the second test, the power production by an equivalent monofacial module installed on a horizontal solar tracker was also monitored. The gain was estimated by comparing the energy yield of the bifacial PV module with that of the monofacial module. For the 1.5 kW PV string systems with a 30° tilt angle to the south and 21% ground albedo, the year-wide average bifacial gain was determined to be 10.5%. An increase of the ground albedo to 79% improved the bifacial gain to 33.3%. During the same period, the horizontal single-axis tracker yielded an energy gain of 15.8%.

scholarly journals Loss Analysis in Perovskite Photovoltaic Modules

Solar RRL ◽  
2019 ◽  
Vol 3 (12) ◽  
pp. 1900338 ◽  
Author(s):  
Lucija Rakocevic ◽  
Laura E. Mundt ◽  
Robert Gehlhaar ◽  
Tamara Merckx ◽  
Tom Aernouts ◽  
...  
Keyword(s):  
Photovoltaic Modules ◽  
Loss Analysis ◽  
Perovskite Photovoltaic

scholarly journals Design of a low-cost measuring and plotting device for photovoltaic modules

2019 ◽  
Vol 52 (9-10) ◽  
pp. 1308-1318
Author(s):  
Sudipta Basu Pal ◽  
Abhijit Das ◽  
Konika Das (Bhattacharya) ◽  
Dipankar Mukherjee
Keyword(s):  
Heat Dissipation ◽  
Low Cost ◽  
Climatic Conditions ◽  
Performance Ratio ◽  
Photovoltaic Module ◽  
Eastern Region ◽  
Testing Apparatus ◽  
Photovoltaic Modules ◽  
Test Kit ◽  
Capacitive Loading

The photovoltaic module testing apparatus being used presently for photovoltaic measurements acts principally on the method of photovoltaic module loading with resistive, capacitive, and electronic elements. In this work, a new method is described using a supercapacitor as the load to the photovoltaic module. This technique of characterization has proved to generate reliable V–I characteristics as validated by statistical and mathematical analyses in this article. Heat dissipation affecting the functioning of the photovoltaic modules is a common occurrence with resistive and capacitive loading techniques. It is reduced significantly in this method using supercapacitors, and curve tracing time is extremely modest and easily controllable. In effect, a low-cost, portable, and reliable I–V plotter is developed, which is operational from an embedded systems platform integrated with smart sensors. This I–V tracer has been used for the performance assessment of solar modules ranging from 10 to 100 Wp under varying climatic conditions in the eastern region of India. This test kit so developed in the photovoltaic engineering laboratory at Indian Institute of Engineering Science and Technology, Shibpur, is estimated to be useful for practicing engineers and photovoltaic scientists and in particular for photovoltaic module manufacturers. The performance parameters such as fill factor and performance ratio of photovoltaic modules measured by the device have been found to have almost identical values as the measurements from a reference commercial testing apparatus. The data pertaining to peak wattage as measured by the designed plotter have been found to be closely converging with an industry-friendly YOKOGAWA Power Meter (WT 330). Such peak values of power as measured and claimed by the datasheets will help reduce the uncertainties in measurement, leading to increased confidence of photovoltaic module manufacturers and investors. With this backdrop, the necessary work for scaling up of the low-cost I–V plotter has been taken up for assessing the performance of higher wattage photovoltaic modules.

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