Sun Tracking Systems: A Review

Lee, Chia-Yen; Chou, Po-Cheng; Chiang, Che‐Ming; Lin, Chiu-Feng

doi:10.3390/s90503875

Cited by 238 publications

(114 citation statements)

References 46 publications

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“…The tolerance of the system was examined in the Section 3.3. The angular acceptance along EW direction was˘0.5˝so that we can use typical Sun tracking system whose tolerance is lower than˘0.2˝ [28]. Very high acceptance angle along NS-direction allows replacement of a Sun tracking system with a seasonal tilting solar system as a cost-effective solution [29].…”

Section: Discussionmentioning

confidence: 99%

A Large Scale Daylighting System Based on a Stepped Thickness Waveguide

Shin

2016

Energies

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This paper presents a study on the use of optical fiber and a solar concentrator for a building daylighting system. Daylighting is essential for improving indoor environments and reducing electric lighting power consumption in office buildings. Traditionally, optical fiber daylighting systems were implemented only on a small scale. More complicated technologies are required for more amounts of daylight over further distance via a smaller light guider. The proposed solar lighting system with optical fiber is composed of an array of linear Fresnel lenses and a stepped thickness waveguide. The linear Fresnel lenses collect light into the stepped thickness waveguide. The stepped-thickness waveguide is an optical component which redirects focused sunlight from the vertical direction to the horizontal direction, and it guides light to the attached optical fiber. Simulation models were developed using commercial optical simulation tools (LightTools™). The optical efficiency and angular tolerance of the system are analyzed. The overall system cost is also estimated. Some considerations on the economic expansion of the system in terms of efficiency and estimated annual average energy saving are discussed. The results show that the presented optical fiber daylighting system is a strong candidate for low-price and highly efficient solution for solar energy application to building energy savings.

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Section: Discussionmentioning

confidence: 99%

A Large Scale Daylighting System Based on a Stepped Thickness Waveguide

Shin

2016

Energies

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“…This is a difficult task because the position of the sun is always changing, and this led us to use a sun tracking system. The required accuracy of the sun tracking system is determined by the solar concentrating collector's angle of tolerance [18][19][20][21]. The tolerance of the system is the acceptable angular deviation of the sunlight direction from the two main axes of the system within the allowable efficiency loss.…”

Section: Tolerance Of the Systemmentioning

confidence: 99%

A Concentrator Photovoltaic System Based on a Combination of Prism-Compound Parabolic Concentrators

Shin

2016

Energies

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Abstract:We present a cost-effective concentrating photovoltaic system composed of a prism and a compound parabolic concentrator (P-CPC). In this approach, the primary collector consists of a prism, a solid compound parabolic concentrator (CPC), and a slab waveguide. The prism, which is placed on the input aperture of CPC, directs the incoming sunlight beam to be parallel with the main axes of parabolic rims of CPC. Then, the sunlight is reflected at the parabolic rims and concentrated at the focal point of these parabolas. A slab waveguide is coupled at the output aperture of the CPC to collect focused sunlight beams and to guide them to the solar cell. The optical system was modeled and simulated with commercial ray tracing software (LightTools™). Simulation results show that the optical efficiency of a P-CPC can achieve up to 89%. when the concentration ratio of the P-CPC is fixed at 50. We also determine an optimal geometric structure of P-CPC based on simulation. Because of the simplicity of the P-CPC structure, a lower-cost mass production process is possible. A simulation based on optimal structure of P-CPC was performed and the results also shown that P-CPC has high angular tolerance for input sunlight. The high tolerance of the input angle of sunlight allows P-CPC solar concentrator utilize a single sun tracking system instead of a highly precise dual suntracking system as cost effective solution.

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“…Since the fixedtype solar array can't acquire the optimum solar power, the transformation potency of solar power is restricted. several students have projected totally different ways for chase the sun [3][4][5][6][7][8][9]. many various source of illumination sensors, candlepower sensors, intelligent vision techniques, and CCD equipments were applied to reckon the absorbed time of the sun radiation in everyday for measurement the quantity of solar power.…”

Section: Mechatronic System Designmentioning

confidence: 99%