Hybrid lighting-CPV, a new efficient concept combining illumination with CPV

Núñez, Rubén Orlando; Antón, Ignacio; Sala, Gabriel

doi:10.1063/1.4753873

Cited by 3 publications

(3 citation statements)

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“…The above data can be further improved by using more optimized Fresnel lenses. , The optical efficiency and flux distribution of a Fresnel lens are best in a range of f = 1.3–2.0, where f is the ratio of focal length/lens diameter. The H 2 production rates under 39 suns using Fresnel lenses with f = 1 from Figure b and with f = 1.6 are shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

Integrated Photo-Electrocatalytic (PEC) Systems for Water Splitting to Hydrogen and Oxygen under Concentrated Sunlight: Effect of Internal Parameters on Performance

et al. 2020

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The development of stable integrated photo-electrocatalytic (PEC) systems for hydrogen production from water is poised to reduce global CO 2 emission. While some PEC systems have reached efficiencies as high as 18%, most demonstrated limited stability, and a non-negligible fraction of these are based on either H 2 production or current measurements, without evidence of O 2 production shedding doubts on the overall requirement of a catalytic cycle. In this work, we focus on a system that works under concentrated sunlight composed of a triple junction, a 3 J InGaP/GaAs/Ge photovoltaic cell with its front side covered with a poly(methyl methacrylate) sheet and its backside protected by metallic Ni foil. The hydroxylated Ni metal, in the alkaline environment used, acts as the oxygen evolution catalyst, in addition to protection from corrosion. It does also act as a heatdissipating material, which is crucial for cell stability under concentrated sunlight. The complete system is stable, producing stoichiometric amounts of H 2 and O 2 , and the reaction is therefore catalytic. Under concentrated light, we have studied the effect of changing the area of the Ni foil (effectively the amount of oxygen evolution catalyst) while keeping the "light-receiving front-cell area" constant. This dimensionless ratio is found to determine the reaction rate, below a ratio (Ni area to cell area) of about 1. Meanwhile, above this number, the reaction rate showed marginal changes; it is desired to have this ratio as large as possible in order to decrease the current density and therefore increase the lifetime of the complete system. A compilation of the most stable and most active similar systems is also given and discussed, in particular, in view of the very small number of available work reporting both H 2 and O 2 measurements. The solar-to-hydrogen efficiencies in this work are found to be 14% at 1−15 suns and 12% at 39 suns.

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Section: Resultsmentioning

confidence: 99%

Integrated Photo-Electrocatalytic (PEC) Systems for Water Splitting to Hydrogen and Oxygen under Concentrated Sunlight: Effect of Internal Parameters on Performance

et al. 2020

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“…A Hybrid Lighting-CPV which combines CPV module with lighting guides is presented by Núñez R et al [79] in 2012. It consists of a hybrid CPV module where a small part of the receiver area is used to inject light in optical guides.…”

Section: Fig 39mentioning

confidence: 99%

“…Artistic impression of an adaptation of optical fiber in CPV bi-concentration parquet of lenses [79] .…”

Section: Fig 41mentioning

confidence: 99%

Building integrated solar concentrating systems: A review

Xuan

Akram

et al. 2020

Applied Energy

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In the building sector, concerns towards the vast energy consumption has promoted the development of renewable energy technologies. In this regards, the solar concentration devices show a promising concept for building applications. However, the solar concentrators for application in buildings have many restrictions, which are different from the traditional solar concentrators. The main objective of this paper is to present a concise review on the building integrated concentrating devices, that have their own characteristics and multiple functions. This paper made a classification based on device's functions, i.e. building integrated concentrated photovoltaic systems (BICPV), building integrated concentrating solar thermal (BICST) and building integrated concentrating solar daylighting (BICSD) and the combination of functions, i.e. BICPV/T, BICPV/D, BICST/D and BICPV/T/D. At the same time, this paper presented an elaborate introduction of the demands, types and applications of the building integrated concentrating devices and prospects/ directions/ policies about these technologies around the world. The review would provide important information for the actual engineering of building integrated concentrating devices.

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Optical Fiber Daylighting System Featuring Alignment-Free

Vu¹,

Shin

2016

IJEPE

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We present a cost-effective optical fiber daylighting system composed of prism and compound parabolic concentrator (P-CPC). Our simulation results demonstrate an optical efficiency of up to 89% when the concentration ratio of the P-CPC is fixed at 100. We have also used a simulation to determine an optimal geometric structure of P-CPCs. Because of the simplicity of the P-CPC structure, a lower-cost mass production process is possible. Our quest for an optimal structure has also shown that P-CPC has high tolerance for input angle of sunlight. The high tolerance allows replacing a highly dual precise active sun-tracking system with a single sun-tracking system as a cost-effective solution. Therefore, our results provide an important breakthrough for the commercialization of optical fiber daylighting systems that are faced with challenges related to high cost.

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Hybrid lighting-CPV, a new efficient concept combining illumination with CPV

Cited by 3 publications

References 0 publications

Integrated Photo-Electrocatalytic (PEC) Systems for Water Splitting to Hydrogen and Oxygen under Concentrated Sunlight: Effect of Internal Parameters on Performance

Integrated Photo-Electrocatalytic (PEC) Systems for Water Splitting to Hydrogen and Oxygen under Concentrated Sunlight: Effect of Internal Parameters on Performance

Building integrated solar concentrating systems: A review

Optical Fiber Daylighting System Featuring Alignment-Free

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