Ageing of Standard PV Module when Integrated in a V-trough Concentration System

AbstractConcentration photovoltaic (CPV) systems are seen as a shortcut to achieve lower photovoltaic (PV) electricity costs/kWh. Within the available CPV configurations, V-trough systems are likely to succeed in the short term since they are less demanding in terms of tracking accuracy and due to their ability to make use of standard PV modules, a well-known and developed technology. However, silicon standard modules were initially designed to operate under 1 sun conditions, facing some challenges when integrated in CPV systems. The present work aims to demonstrate that such application is efficient up to a few suns and also to analyze possible accelerated modules degradation rates. For such analysis we have used a prototype based on the DoubleSun® technology: a 1.9x concentration V-trough system, integrating 2-axis tracking system and making use of conventional silicon modules.

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An empirical correlation of ambient temperature impact on PV module considering natural convection

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v19.i2.pp627-634 ◽

2020 ◽

Vol 19 (2) ◽

pp. 627

Author(s):

Kamil Jadu Ali ◽

Ahmed Hasan Mohammad ◽

Ghanim Thiab Hasan

Keyword(s):

Natural Convection ◽

Solar Radiation ◽

Ambient Temperature ◽

Analytical Model ◽

Incident Angle ◽

Tracking System ◽

Empirical Correlations ◽

Pv Module ◽

Pv Modules ◽

Temperature Impact

<p><span>In this paper, the effect of the ambient temperature on the PV modules for different angles of inclinations and different intensities of the solar radiation on the surface of the PV module is considered by using empirical correlations for natural convection. An analytical model based on the energy balance equilibrium between the PV module and the environment conditions has been used. Also an expression for calculating the electric power of silicon PV modules in a function of the ambient temperature, the intensity of the solar radiation, the incident angle of the solar radiation to the surface of the PV module and the efficiency of the PV modules at STC conditions have been used. By comparing the obtained both results, it can be seen that the largest deviation between the power values obtained by the analytical model and expression is about (5 %). The results obtained indicates that in the case of a small number of PV modules corresponding to the required number for an average household, it is more economical to invest additional resources in increasing the PV module's surface area than in case of the PV module with sun tracking system. </span></p>

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Performansi aktual modul photovoltaik dengan pengarah matahari

Jurnal Teknik Mesin Indonesia ◽

10.36289/jtmi.v12i2.80 ◽

2018 ◽

Vol 12 (2) ◽

pp. 98 ◽

Cited By ~ 1

Author(s):

Jalaluddin . ◽

Baharuddin Mire

Keyword(s):

Solar Radiation ◽

Local Time ◽

Performance Characteristic ◽

Electrical Energy ◽

Photovoltaic Module ◽

Experiment Data ◽

Actual Performance ◽

Pv Module ◽

Solar Tracking ◽

Pv Modules

Actual performance of photovoltaic module with solar tracking is presented. Solar radiation can be converted into electrical energy using photovoltaic (PV) modules. Performance of polycristalline silicon PV modules with and without solar tracking are investigated experimentally. The PV module with dimension 698 x 518 x 25 mm has maximum power and voltage is 45 Watt and 18 Volt respectively. Based on the experiment data, it is concluded that the performance of PV module with solar tracking increases in the morning and afternoon compared with that of fixed PV module. It increases about 18 % in the morning from 10:00 to 12:00 and in the afternoon from 13:30 to 14:00 (local time). This study also shows the daily performance characteristic of the two PV modules. Using PV module with solar tracking provides a better performance than fixed PV module.

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Modeling and experimental investigation of dust effect on glass cover PV module with fixed and tracking system under semi-arid climate

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2021.111219 ◽

2021 ◽

Vol 230 ◽

pp. 111219

Author(s):

Alae Azouzoute ◽

Charaf Hajjaj ◽

Houssain Zitouni ◽

Massaab El Ydrissi ◽

Oumaima Mertah ◽

...

Keyword(s):

Experimental Investigation ◽

Tracking System ◽

Arid Climate ◽

Glass Cover ◽

Pv Module ◽

Dust Effect ◽

Semi Arid

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

Energies ◽

10.3390/en14082308 ◽

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%).

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Assessment of uncertainties and variations in PV modules degradation rates and lifetime predictions using physical models

Solar Energy ◽

10.1016/j.solener.2021.01.071 ◽

2021 ◽

Vol 218 ◽

pp. 354-367

Author(s):

Ismail Kaaya ◽

Julián Ascencio-Vásquez ◽

Karl-Anders Weiss ◽

Marko Topič

Keyword(s):

Physical Models ◽

Degradation Rates ◽

Pv Modules

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A Study of Optimal Specifications for Light Shelves with Photovoltaic Modules to Improve Indoor Comfort and Save Building Energy

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18052574 ◽

2021 ◽

Vol 18 (5) ◽

pp. 2574

Author(s):

Heangwoo Lee ◽

Xiaolong Zhao ◽

Janghoo Seo

Keyword(s):

Energy Savings ◽

Building Energy ◽

Energy Performance ◽

Building Energy Efficiency ◽

Efficiency Change ◽

Photovoltaic Modules ◽

Heating And Cooling ◽

Pv Module ◽

Pv Modules ◽

Indoor Comfort

Recent studies on light shelves found that building energy efficiency could be maximized by applying photovoltaic (PV) modules to light shelf reflectors. Although PV modules generate a substantial amount of heat and change the consumption of indoor heating and cooling energy, performance evaluations carried out thus far have not considered these factors. This study validated the effectiveness of PV module light shelves and determined optimal specifications while considering heating and cooling energy savings. A full-scale testbed was built to evaluate performance according to light shelf variables. The uniformity ratio was found to improve according to the light shelf angle value and decreased as the PV module installation area increased. It was determined that PV modules should be considered in the design of light shelves as their daylighting and concentration efficiency change according to their angles. PV modules installed on light shelves were also found to change the indoor cooling and heating environment; the degree of such change increased as the area of the PV module increased. Lastly, light shelf specifications for reducing building energy, including heating and cooling energy, were not found to apply to PV modules since PV modules on light shelf reflectors increase building energy consumption.

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An Improved Generalized Method for Evaluation of Parameters, Modeling, and Simulation of Photovoltaic Modules

International Journal of Photoenergy ◽

10.1155/2017/2532109 ◽

2017 ◽

Vol 2017 ◽

pp. 1-19 ◽

Cited By ~ 8

Author(s):

Vandana Jha ◽

Uday Shankar Triar

Keyword(s):

Modeling And Simulation ◽

Standard Test ◽

Unknown Parameters ◽

Photovoltaic Modules ◽

Pv Module ◽

Test Conditions ◽

Pv Modules ◽

Evaluation Of Parameters ◽

Output Characteristics ◽

Matlab Programming

This paper proposes an improved generalized method for evaluation of parameters, modeling, and simulation of photovoltaic modules. A new concept “Level of Improvement” has been proposed for evaluating unknown parameters of the nonlinear I-V equation of the single-diode model of PV module at any environmental condition, taking the manufacturer-specified data at Standard Test Conditions as inputs. The main contribution of the new concept is the improvement in the accuracy of values of evaluated parameters up to various levels and is based on mathematical equations of PV modules. The proposed evaluating method is implemented by MATLAB programming and, for demonstration, by using the values of parameters of the I-V equation obtained from programming results, a PV module model is build with MATLAB. The parameters evaluated by the proposed technique are validated with the datasheet values of six different commercially available PV modules (thin film, monocrystalline, and polycrystalline) at Standard Test Conditions and Nominal Operating Cell Temperature Conditions. The module output characteristics generated by the proposed method are validated with experimental data of FS-270 PV module. The effects of variation of ideality factor and resistances on output characteristics are also studied. The superiority of the proposed technique is proved.

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Study on the Influence of Mounting Dimensions of PV Array on Module Temperature in Open-Joint Photovoltaic Ventilated Double-Skin Façades

Sustainability ◽

10.3390/su13095027 ◽

2021 ◽

Vol 13 (9) ◽

pp. 5027

Author(s):

Wenjie Zhang ◽

Tongdan Gong ◽

Shengbing Ma ◽

Jianwei Zhou ◽

Yingbo Zhao

Keyword(s):

Heat Dissipation ◽

Temperature Drop ◽

Vertical Direction ◽

Wind Pressure ◽

Pv Array ◽

Pv Module ◽

Pv Modules ◽

Double Skin ◽

Open Joint ◽

Double Skin Facades

In building integrated photovoltaics (PV), it is important to solve the heat dissipation problem of PV modules. In this paper, the computational fluid dynamics (CFD) method is used to simulate the flow field around the open-joint photovoltaic ventilated double-skin façades (OJ-PV-DSF) to study the influence of the mounting dimensions (MD) of a PV array on the module temperature. The typical summer afternoon meteorological parameters, such as the total radiation (715.4 W/m2), the outdoor temperature (33.1 °C), and the wind speed (2.0 m/s), etc., are taken as input parameters. With the DO (discrete ordinates) model and the RNG (renormalization-group) k − ε model, a steady state calculation is carried out to simulate the flow of air in and around the cavity under the coupling of hot pressure and wind pressure, thereby obtaining the temperature distribution of the PV array and the wall. In addition, the simulation results are compared with the onsite experimental data and thermal imaging to verify the accuracy of the CFD model. Then three MD of the open joints are discussed. The results show that when the a value (represents the distance between PV modules and wall) changes from 0.05 to 0.15, the temperature drop of the PV module is the most obvious, reaching 2.0 K. When the b value (representing the distance between two adjacent PV modules in the vertical direction) changes from 0 to 0.1, the temperature drop of the PV module is most obvious, reaching 1 K. When the c value (represents the distance between two adjacent PV modules in the horizontal direction) changes from 0 to 0.1, the temperature of the PV module is lowered by 0.8 K. Thus, a = 0.1–0.15, b = 0.1 and c = 0.1 are recommended for engineering applications to effectively reduce the module temperature.

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High Precision Optical Tracking System Based on near Infrared Trinocular Stereo Vision

Sensors ◽

10.3390/s21072528 ◽

2021 ◽

Vol 21 (7) ◽

pp. 2528

Author(s):

Songlin Bi ◽

Yonggang Gu ◽

Jiaqi Zou ◽

Lianpo Wang ◽

Chao Zhai ◽

...

Keyword(s):

High Precision ◽

Stereo Vision ◽

Near Infrared ◽

Nearest Neighbor ◽

Tracking System ◽

Optical Tracking ◽

Tracking Accuracy ◽

Optical Tracking System ◽

Dynamic Tracking ◽

Trinocular Stereo

A high precision optical tracking system (OTS) based on near infrared (NIR) trinocular stereo vision (TSV) is presented in this paper. Compared with the traditional OTS on the basis of binocular stereo vision (BSV), hardware and software are improved. In the hardware aspect, a NIR TSV platform is built, and a new active tool is designed. Imaging markers of the tool are uniform and complete with large measurement angle (>60°). In the software aspect, the deployment of extra camera brings high computational complexity. To reduce the computational burden, a fast nearest neighbor feature point extraction algorithm (FNNF) is proposed. The proposed method increases the speed of feature points extraction by hundreds of times over the traditional pixel-by-pixel searching method. The modified NIR multi-camera calibration method and 3D reconstruction algorithm further improve the tracking accuracy. Experimental results show that the calibration accuracy of the NIR camera can reach 0.02%, positioning accuracy of markers can reach 0.0240 mm, and dynamic tracking accuracy can reach 0.0938 mm. OTS can be adopted in high-precision dynamic tracking.

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Effect of Unglazed Transpired Collector on the Performance of a Polycrystalline Silicon Photovoltaic Module

Journal of Solar Energy Engineering ◽

10.1115/1.2212438 ◽

2006 ◽

Vol 128 (3) ◽

pp. 349-353 ◽

Cited By ~ 19

Author(s):

A. T. Naveed ◽

E. C. Kang ◽

E. J. Lee

Keyword(s):

Polycrystalline Silicon ◽

Electrical Power ◽

Heating System ◽

Photovoltaic Module ◽

Forced Ventilation ◽

Pv System ◽

Pv Module ◽

Pv Modules ◽

Typical Day ◽

Electrical Output

The electrical power generated by a polycrystalline silicon photovoltaic (PV) module mounted on an unglazed transpired solar collector (UTC) has been studied and compared to that of a PV module without UTC for a quantitative analysis of electrical output and its role in reducing the simple payback periods of photovoltaic electrical systems. A 75W polycrystalline silicon PV module was fixed on an UTC in front of the ventilation fan, and effectiveness of cooling by means of the forced ventilation at the rate of 160CFM was monitored. The temperature reduction under forced ventilation was in the range of 3-9°C with a 5% recovery in the electrical output power on a typical day of the month of February 2005. The simulated and measured electrical power outputs are in reasonable agreement with root-mean-square error of 2.40. The life cycle assessment of a hypothetical PV system located at Daejeon, South Korea and consisting of 3kW PV modules fixed on a 50m2 UTC shows that with a possible reduction of 3-9°C in the operating temperatures, the system requires three 75W fewer PV modules. The simple payback period of PV system is reduced from 23yearsto15years when integrated into an UTC air heating system.

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