scholarly journals Influence of Solar Position Calculation Methods Applied to Horizontal Single-Axis Solar Trackers on Energy Generation

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3826
Author(s):  
Karen Barbosa de Melo ◽  
Hugo Soeiro Moreira ◽  
Marcelo Gradella Villalva
Keyword(s):  
Energy Generation ◽  
Energy Conversion Efficiency ◽  
Photovoltaic Systems ◽  
Critical Factors ◽  
Calculation Methods ◽  
Photovoltaic Panels ◽  
Solar Tracking ◽  
Photovoltaic Plants ◽  
Solar Position ◽  
Tracking Strategy

Photovoltaic systems have been explored as a solution to meet the growing demand for electricity from a clean and renewable source. However, the low energy conversion efficiency of photovoltaic panels is one of the critical factors that hinder the competitiveness of this energy source concerning the others. An effective way to improve the efficiency of photovoltaic systems is by using solar trackers. The tracking strategy most used in photovoltaic plants employs algorithms to calculate the Sun position. This work presents energy generation estimation applying six algorithms in horizontal single-axis solar tracking: the Solar Position Algorithm (SPA) and Grena 1–5 algorithms. The aim is to evaluate the influence of these algorithms on energy generation. For all simulated locations, comparing to an ideal scenario, the SPA presented the best energy generation results. However, the other algorithms showed negligible differences between themselves, which allows us to conclude that any of the algorithms can be used without implying significant energy losses. Thus, Grena 1–2 can be highlighted for easier implementation.

Open-loop solar tracking strategy for high concentrating photovoltaic systems using variable tracking frequency

2016 ◽  
Vol 117 ◽  
pp. 142-149 ◽  
Author(s):  
Zhe Mi ◽  
Jikun Chen ◽  
Nuofu Chen ◽  
Yiming Bai ◽  
Rui Fu ◽  
...  
Keyword(s):  
Open Loop ◽  
Photovoltaic Systems ◽  
Solar Tracking ◽  
Tracking Strategy

scholarly journals New Omnidirectional Sensor Based on Open-Source Software and Hardware for Tracking and Backtracking of Dual-Axis Solar Trackers in Photovoltaic Plants

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 726
Author(s):  
Francisco J. Gómez-Uceda ◽  
José Ramirez-Faz ◽  
Marta Varo-Martinez ◽  
Luis Manuel Fernández-Ahumada
Keyword(s):  
Open Source Software ◽  
Energy Production ◽  
Scientific Community ◽  
Radiative Capture ◽  
Low Cost ◽  
Free Software ◽  
Solar Tracking ◽  
Software And Hardware ◽  
Celestial Sphere ◽  
Photovoltaic Plants

In this work, an omnidirectional sensor that enables identification of the direction of the celestial sphere with maximum solar irradiance is presented. The sensor, based on instantaneous measurements, functions as a position server for dual-axis solar trackers in photovoltaic plants. The proposed device has been developed with free software and hardware, which makes it a pioneering solution because it is open and accessible as well as capable of being improved by the scientific community, thereby contributing to the rapid advancement of technology. In addition, the device includes an algorithm developed ex professo that makes it possible to predetermine the regions of the celestial sphere for which, according to the geometric characteristics of the PV plant, there would be shading between the panels. In this way, solar trackers do not have to locate the Sun’s position at all times according to astronomical models, while taking into account factors such as shadows or cloudiness that also affect levels of incident irradiance on solar collectors. Therefore, with this device, it is possible to provide photovoltaic plants with dual-axis solar tracking with a low-cost device that helps to optimise the trajectory of the trackers and, consequently, their radiative capture and energy production.

scholarly journals Comparison of Solar Tracking and Solar Fix Mode on the Efficiency Electric Energy Generation Based on Microcontroller

2020 ◽  
Vol 537 ◽  
pp. 012030
Author(s):  
Dean Corio ◽  
Alvino Ramadian ◽  
Rheyuniarto Sahlendar Asthan ◽  
Mia Maria Ulfah
Keyword(s):  
Electric Energy ◽  
Energy Generation ◽  
Solar Tracking

Solar Tracking Device Based on Electronic Compass and Accelerometer

2014 ◽  
Vol 981 ◽  
pp. 522-525 ◽  
Author(s):  
Zhong Ran Zhang ◽  
Yuan Ma ◽  
Bo Jiao ◽  
Tong Liang Liu
Keyword(s):  
Elevation Angle ◽  
Least Square Method ◽  
Least Square ◽  
Stable Operation ◽  
Solar Tracking ◽  
High Flexibility ◽  
Tracking Device ◽  
Solar Position ◽  
Electronic Compass ◽  
The Magnetic Field

A solar tracking device was designed in this paper. First, In order to determine the initial direction of the mechanism and the east, HMC5883L was used for measuring the magnetic field of earth. Then, the mechanism began to operate according to the solar position which was confirmed though the astronomical calculation. Finally, the azimuth and the elevation angle of solar were measured and corrected by HMC5883L and MPU6050 respectively. HMC5883L was calibrated by the ellipse fitting, which was obtained though the least square method. The horizontal error of HMC5883L was compensated. The experimental study was performed. And the results show that the solar tracking device has the characteristics of stable operation, high flexibility and low requirement of installation precision.

Analiza kapaciteta i uslova izgradnje fotonaponskih sistema na krovovima školskih objekata u Srbiji

2020 ◽  
Vol 22 (1-2) ◽  
pp. 21-28
Author(s):  
Iva Batić ◽  
◽  
Željko Đurišić
Keyword(s):  
Electricity Consumption ◽  
Plant Production ◽  
Electricity Production ◽  
School Buildings ◽  
Photovoltaic Systems ◽  
Photovoltaic Panels ◽  
Passive Construction ◽  
Production And Consumption ◽  
Roof Area ◽  
Installed Capacity

School and school gym buildings represent a relevant potential for construction of photovoltaic panels, to be integrated into roofs of these buildings. Given that roof structures are passive, construction of photovoltaic systems does not interfere with the building functionality, does not it in any way adversely affect the environment. Installation of photovoltaic systems on building roofs brings the production and consumption of electricity closest possible, therefore such systems ensure significant reduction in power losses in transmission and distribution grids. In addition to locally produced electricity, construction of photovoltaic systems on the school buildings’ roofs produces an educational effect as well. By installing a measuring and acquisition system which would include the measuring data on the photovoltaic power plant production parameters and school electricity consumption into school labs, technology would be closer to students, as well as possibilities to meet the demand for electricity from this basic renewable energy source. This paper presents the results of evaluations of the available roof surfaces of school buildings in Serbia for the photovoltaic panels installation. For each category of school building, an estimate of possible annual production per unit of average roof area was made. Summarizing all the results, estimates of possible installed capacity and annual electricity production for different scenarios are given.

scholarly journals Photovoltaic greenhouses: evaluation of shading effect and its influence on agricultural performances

2014 ◽  
Vol 45 (4) ◽  
pp. 168 ◽  
Author(s):  
Sergio Castellano
Keyword(s):  
Energy Efficiency ◽  
Rural Areas ◽  
Threshold Value ◽  
Plant Production ◽  
Photovoltaic Systems ◽  
Scientific Evaluation ◽  
Shading Effect ◽  
Photovoltaic Panels ◽  
Pv Modules ◽  
San Rafael

During the last years, European government remuneration polices promoted the realisation of photovoltaic systems integrated with the structures instead of on ground photovoltaic (PV) plants. In this context, in rural areas, greenhouses covered with PV modules have been developed. In order to interdict the building of greenhouses with an amount of opaque panels on covering not coherent with the plant production, local laws assigned a threshold value, usually between 25% and 50%, of the projection on the soil of the roof. These ranges seem not to be based on scientific evaluation about the agricultural performances required to the building but only on empirical assessments. Purpose of this paper is to contribute to better understand the effect of different configurations of PV panels on the covering of a monospan duo-pitched roof greenhouse in terms of shading effect and energy efficiency during different periods of the year. At this aim, daylighting and insolation analysis were performed by means of the software Autodesk<sup>®</sup> Ecotect<sup>®</sup> Analysis (Autodesk, Inc., San Rafael, CA, USA) on greenhouse model with different covering ratio of polycrystalline photovoltaic panels on the roof.

scholarly journals Sensorless iterative solar tracking in multiple on-grid photovoltaic generators with improved tracking strategy

2011 ◽  
pp. 818-823
Author(s):  
Guilherme F. Cittolin ◽  
Jéssica V. Mazuroski ◽  
Rafael C. Gonçalves ◽  
Marcel G. Kroetz ◽  
Carlo A.Z. Pece ◽  
...  
Keyword(s):  
Solar Tracking ◽  
Photovoltaic Generators ◽  
Tracking Strategy

scholarly journals Photovoltaic systems – types of installations, materials, monitoring and modeling - review

2020 ◽  
pp. 40-49 ◽  
Author(s):  
Angelika Anduła ◽  
Dariusz Heim
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Residential Buildings ◽  
Future Research ◽  
Photovoltaic Systems ◽  
Zero Energy ◽  
Thermal Systems ◽  
Photovoltaic Panels ◽  
Common Solution

Photovoltaic systems have become a common solution for, both small residential buildings as well as large service buildings. When buildings are being designed, it is important to focus on the aspect of the object’s energy efficiency as lowering the energy consumption of a given facility is crucial. The article discusses the use of photovoltaic panels such as so-called BAPV (Building Applied Photovoltaics) and BIPV (Building Installed Photovoltaics) installations as well as photovoltaic thermal systems (PV/T), which generate both electricity and heat. The role of PV installation in so-called zero energy buildings and proposals for future research and solutions are also discussed.

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