The dome-shaped Fresnel-Köhler concentrator

Zamora, Pablo; Benı́tez, Pablo; Li, Y.; Miñano, Juan C.; Mendes-Lopes, João; Araki, Kiyomichi

doi:10.1063/1.4753836

Cited by 9 publications

(6 citation statements)

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“…The optical efficiency is about 0.85 and the electrical efficiency is up to 32.7%. They also designed a dome-shaped FK concentrator [76,77]. Comparing to normal FK concentrator, dome-shaped FK concentrator has higher concentrationacceptance product and thus it has better optical performance.…”

Section: Transmission-type Two Elements Combinationmentioning

confidence: 99%

“…However, for CPV system, energy distribution uniformity of focus becomes a very important design objective because uniformity has a significant effect on the photoelectric conversion efficiency of solar cell. Meanwhile, inhomogeneous distribution makes it difficult to cool the solar cell [20,21,47,55,56,[71][72][73][74][75][76][77][78]85,86]. For CPV/T system, there are two ways for utilization.…”

Section: Applicationmentioning

confidence: 99%

“…Generally, multi-element combination structures are usually designed to achieve high power concentration so that GCR is ranged from hundreds to thousands. Consequently, acceptance angle of this type of concentrator is relatively small, so that tracking mechanism is required, as introduced in references [50][51][52][53]57,66,[71][72][73][74][75][76][77][78]81,82]. The allowed tracking error angles of these concentrators are generally less than 1°, some even as small as 0.1°, which requires high-precision photoelectrical tracking devices.…”

Section: Applicationmentioning

confidence: 99%

“…Hence, as described in references [20,21,47,55,85,[88][89][90][91], the reflectors near the receiver is mostly flat surface which does not change the order of light transmission. Also, TIR concentrators can be used as homogenizer for CPV system [73][74][75][76][77].…”

Section: Applicationmentioning

confidence: 99%

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A Review on Solar Concentrators with Multi-surface and Multi-element Combinations

Zheng

Liu

2019

Journal of Daylighting

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Solar concentrator always plays an important role in solar energy collection as it could enhance the energy density effectively. Various structures of solar concentrators have been researched in recent years, among which multi-surface (MS) and multi-element (ME) combinations are the two typical structures. MS concentrator is an improved structure for single surface concentrator. It is usually designed to increase the acceptance angle, enhance the light intercepting efficiency, homogenize the energy distribution, etc. ME concentrator is generally consist of two or more optical elements, in which MS concentrators are usually used as assistant optical components. ME concentrator always has larger tolerance on tracking error so that it is much easier to track the sun. It could be applied in high power concentration. The combination on optical elements of MS and ME solar concentrators was diagramed and theirs advantages and disadvantages were evaluated. Nowadays, solar applications are becoming more and more diverse and concomitantly, the researching methods are also improving. The computer-aided methods including numerical computation and optical simulation are the dominant method in nowadays, which makes it easier to analyze various structures of solar concentrators and their complex applications. Besides, solar applications are not limited in CT and CPV, but in many other fields such as solar daylighting, solar-pumped laser, solar cooling, solar desalination etc. It has been believed that more and more innovative designs on solar concentrator will be proposed in the future.

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Section: Transmission-type Two Elements Combinationmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

See 2 more Smart Citations

A Review on Solar Concentrators with Multi-surface and Multi-element Combinations

Zheng

Liu

2019

Journal of Daylighting

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“…For further details see [4] and [9]. Recently, an FK concentrator with a dome-shaped Fresnel lens has been designed and manufactured [17,18] (see Fig. 3).…”

Section: The Fk Concentratormentioning

confidence: 99%

Free-form optics for Fresnel-lens-based photovoltaic concentrators

Miñano¹,

Benı́tez²,

Zamora³

et al. 2013

Opt. Express

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Abstract:The Concentrated Photovoltaics (CPV) promise relies upon the use of high-efficiency triple-junction solar cells (with proven efficiencies of over 44%) and upon high-performance optics that allow for high concentration concurrent with relaxed manufacturing tolerances (all key elements for low-cost mass production). Additionally, uniform illumination is highly desirable for efficiency and reliability reasons. All of these features have to be achieved with inexpensive optics containing only a few (in general no more than 2) optical elements. In this paper we show that the degrees of freedom using free-forms allow the introduction of multiple functionalities required for CPV with just 2 optical elements, one of which is a Fresnel lens.

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