Selective spectral filtration with nanoparticles for concentrating solar collectors

DeJarnette, Drew; Otanicar, Todd; Brekke, Nick; Hari, Parameswar; Roberts, Kenneth P.

doi:10.1117/1.jpe.5.057008

Cited by 16 publications

(9 citation statements)

References 43 publications

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“…The model used to calculate filter optical properties was based on individual nanoparticles properties using the radiative transport equation (RTE). The RTE can model the transfer of energy from a photon as it moves through a particular medium [19,[21][22][23]. Absorbance of light in the fluid was calculated by solving the integral equation…”

Section: Modelingmentioning

confidence: 99%

“…Optimization of the fluid filter requires several simulations of varying nanoparticle aspect ratio to determine which particle combination provides the highest filter efficiency. Previous results have shown theoretical models of nanoparticle types and the effect of filter optimization [19,24]. Here, experimental results were compared to theoretical models to perform optimizations that more closely represent a real system.…”

Section: Nanoparticle Optical Propertiesmentioning

confidence: 99%

“…Nanoparticles used as color filters include both size and shape controlled colloidal nanoparticles along with planar metamaterials which utilize geometric coupling analogous to Bragg diffraction [16,17]. However, while tunable filters using a colloidal nanoparticle fluid matrix have been researched [18][19][20], they have not been readily utilized in the industry or experimentally demonstrated with any high degree of spectral filtration.…”

Section: Introductionmentioning

confidence: 99%

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Nanoparticle enhanced spectral filtration of insolation from trough concentrators

DeJarnette

Tunkara

Brekke

et al. 2016

Solar Energy Materials and Solar Cells

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A nanoparticle fluid filter consisting of gold nanoparticles and indium tin oxide nanocrystals was fabricated and the optical properties were assessed. Results were integrated against the AM 1.5 solar spectrum to determine solar weighted efficiency of the filter for light energies transmitted above the bandgap to a photovoltaic cell for direct electrical generation while absorbing light below the bandgap that is converted to heat for thermal storage or processing. Temperature dependent bandgaps for both GaAs and cSi were used for optimization of the filter design. GaAs is preferred based upon its higher IR reflectivity, lower temperature coefficient, and greater high-temperature efficiency. However, cSi is significantly cheaper than current and projected GaAs costs. It was found that the experimental filter efficiency was 62% for GaAs and 56% for cSi which was within 6% of previous theoretical predictions.

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Section: Modelingmentioning

confidence: 99%

Section: Nanoparticle Optical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanoparticle enhanced spectral filtration of insolation from trough concentrators

DeJarnette

Tunkara

Brekke

et al. 2016

Solar Energy Materials and Solar Cells

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“…• Creating stable nanoparticle optical properties at higher temperatures; thermalization of the nanoparticles changes their geometry, aspect ratio or shell size, which consequently alters their optical properties [49].…”

Section: Emerging Spectral Splitting Methodsmentioning

confidence: 99%

“…Nanorods with tunable aspect ratios and triangular nanoplates with tunable thickness and diameter can be used in such cases [49].…”

Section: Emerging Spectral Splitting Methodsmentioning

confidence: 99%

Spectral light management for solar energy conversion systems

2016

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Due to the inherent broadband nature of the solar radiation, combined with the narrow spectral sensitivity range of direct solar to electricity devices, there is a massive opportunity to manipulate the solar spectrum to increase the functionality and efficiency of solar energy conversion devices. Spectral splitting or manipulation facilitates the efficient combination of both high-temperature solar thermal systems, which can absorb over the entire solar spectrum to create heat, and photovoltaic cells, which only convert a range of wavelengths to electricity. It has only recently been possible, with the development of nanofabrication techniques, to integrate micro-and nano-photonic structures as spectrum splitters/manipulators into solar energy conversion devices. In this paper, we summarize the recent developments in beam splitting techniques, and highlight some relevant applications including combined PV-thermal collectors and efficient algae production, and suggest paths for future development in this field.

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Experimental investigation of a concentrating PV/T collector with Cu9S5 nanofluid spectral splitting filter

Zhu

et al. 2016

Applied Energy

184

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Selective spectral filtration with nanoparticles for concentrating solar collectors

Cited by 16 publications

References 43 publications

Nanoparticle enhanced spectral filtration of insolation from trough concentrators

Nanoparticle enhanced spectral filtration of insolation from trough concentrators

Spectral light management for solar energy conversion systems

Experimental investigation of a concentrating PV/T collector with Cu9S5 nanofluid spectral splitting filter

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