Design of a sun tracker for the automatic measurement of spectral irradiance and construction of an irradiance database in the 330–1100nm range

Cañada, J.; Utrillas, M. P.; Martínez‐Lozano, J. A.; Pedrós, R.; Gómez-Amo, José Luís; Maj, A.

doi:10.1016/j.renene.2006.11.001

Cited by 29 publications

(9 citation statements)

References 37 publications

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“…Incidence angle of the sun h can be calculated with the following formula: 47 h ¼ cos À1 ð½sin ðdÞ sin ð/Þ cos ðbÞÞ À ½sin ðdÞ cos ð/Þ sin ðbÞ þ½cos ðdÞ cos ð/Þ cos ðbÞ cos ðxÞ þ½cos ðdÞ sinð/Þ cosðbÞ cosðxÞ þ ½cos ðdÞ sinðbÞ sinðcÞ sinðxÞ:…”

Section: The Theoretical Approaching For Solar Radiation Calculatunclassified

The analysis on the impact of the roof angle on electricity energy generation of photovoltaic panels in Kahramanmaras, Turkey—A case study for all seasons

Yılmaz

Özçalık

Dinçer

2015

Journal of Renewable and Sustainable Energy

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Photovoltaic (PV) panels absorb solar energy most when solar radiation perpendicularly reaches on upon surface. This leads to the notion of optimal roof angle. Optical and geometrical properties of the panels are of vital importance in order to obtain maximum energy from the Sun. Therefore, this study focuses on the horizontal roof angle which has a crucial impact on the performance of PV panels. Total solar radiation, optimal roof angle and effects of different angles on PV panels in Kahramanmaras province of Turkey on different days are numerically and experimentally analyzed and discussed. Additionally, roof angle influences the amount of solar radiation reaching on the surface and varies depending on the geographic location and seasons. 7.9% more energy can be generated in the proposed systems where roof angle can be daily adjusted. This greatly influences the amount of solar energy when optimal roof angles are calculated annually depending on the seasons in a region. However, it is quite costly and challenging to adjust the roof angle as far as a building is concerned. V C 2015 AIP Publishing LLC.

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Section: The Theoretical Approaching For Solar Radiation Calculatunclassified

The analysis on the impact of the roof angle on electricity energy generation of photovoltaic panels in Kahramanmaras, Turkey—A case study for all seasons

Yılmaz

Özçalık

Dinçer

2015

Journal of Renewable and Sustainable Energy

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“…A solar tracking system usually returns to its initial rest position after sunset, and starts to track the sun after the sun rises above the horizon. Canada et al [11] designed an automatic global and direct solar spectral irradiance system using remote cosine sensors. This system returned to its rest position at the end of each measurement cycle [11].…”

Section: Sunrise and Sunset Timesmentioning

confidence: 99%

“…Canada et al [11] designed an automatic global and direct solar spectral irradiance system using remote cosine sensors. This system returned to its rest position at the end of each measurement cycle [11]. The sunrise and sunset times can be calculated from [12]:…”

Section: Sunrise and Sunset Timesmentioning

confidence: 99%

Development of an embedded solar tracker for the enhancement of solar energy utilization

Lee

Chen

et al. 2011

Int. J. Energy Res.

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SUMMARYAn embedded two-axis solar tracking system using Laboratory Virtual Instrumentation Engineering Workbench to write the operation and control algorithms was developed for enhancing solar energy utilization. The system consists of a real-time processor, two motion-control modules, two step drives, two step motors, feedback devices, and other accessories needed for functional stability. The real-time processor allows the solar tracker to be used as a stand-alone, real-time system that can operate automatically without any external control. The system combines two different solar tracking methods: the optical method and the astronomical method. Cadmium Sulfide (CdS) sensors are employed to continuously generate feedback signals to the controller, ensuring high-precision solar tracking even under adverse conditions. The CdS sensor is a resistor whose electric resistance decreases with increasing incident light intensity. A database of solar altitude, azimuth, and sunrise and sunset times is provided by this solar tracking system. Other solar trackers operating in an astronomical method may access and use this database over the Internet. Solar position and sunrise and sunset times in the database were compared with those of the Astronomical Applications Department of the U.S. Naval Observatory. The differences were found to be negligible.

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“…The use of sun trackers schemes in conjunction with MPPT control strategies has been demonstrated very useful in order to get higher efficiency in photovoltaic plants [12][13][14][15][16][17]. The basis of sun tracker equipment is to hold the PV array in the best position regarding the sun location during the sunny time.…”

Section: Sun Tracker Equipmentmentioning

confidence: 99%

On the use of sun trackers to improve maximum power point tracking controllers applied to photovoltaic systems

Jaen

Pou

Capella

et al. 2009

2009 Compatability and Power Electronics

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Abstract-Nowadays power supply systems based on photovoltaic cells have two main drawbacks, even the primary energy is free and renewable. They are: production cost and efficiency. In order to increase their efficiency, it should be interesting that the energy transfer between cells and load was done at maximum level. In this paper the use of a sun tracker system is presented as an additional improvement applied to a photovoltaic installation that works under a maximum power point tracking (MPPT) control technique. A 50W-prototype has been assembled. Some experimental results are also included in order to validate the whole system.

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Design of a sun tracker for the automatic measurement of spectral irradiance and construction of an irradiance database in the 330–1100nm range

Cited by 29 publications

References 37 publications

The analysis on the impact of the roof angle on electricity energy generation of photovoltaic panels in Kahramanmaras, Turkey—A case study for all seasons

The analysis on the impact of the roof angle on electricity energy generation of photovoltaic panels in Kahramanmaras, Turkey—A case study for all seasons

Development of an embedded solar tracker for the enhancement of solar energy utilization

On the use of sun trackers to improve maximum power point tracking controllers applied to photovoltaic systems

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