Multilayer angular optical filter as a smart window

Aly, Arafa H.; Ahmed, Ashour M.; Abukhadra, Mostafa R.

doi:10.1007/s12648-019-01438-2

Cited by 8 publications

(7 citation statements)

References 50 publications

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“…It can be used only for low-temperature applications. In 2020, Arafa et al proposed an optical filter structure to control the propagation of light through it depending on the incident angle 26 . Besides, this structure can't record high (for winter) and low (for summer) transmitted infra-red light at the same time.…”

Section: Novel Smart Window Using Photonic Crystal For Energy Savingmentioning

confidence: 99%

Novel smart window using photonic crystal for energy saving

Zaky

Aly

2022

Sci Rep

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Smart windows are emerging as an effective way of minimizing energy consumption in buildings. They attracted the major relevance for minimizing energy consumption in buildings. More research studies are needed to design smart windows with operating wide range and don’t require additional energy to operate. We suggest a novel smart window structure using photonic crystal to regulate the solar radiation intensity by preventing it from penetrating the buildings in summer. For the first time, the suggested smart window photonic crystal at room temperature is proposed. The suggested smart window can block about 400 nm of near-infrared. This smart window model doesn’t require additional heat or electric input to operate.

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Section: Novel Smart Window Using Photonic Crystal For Energy Savingmentioning

confidence: 99%

Novel smart window using photonic crystal for energy saving

Zaky

Aly

2022

Sci Rep

Self Cite

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“…Greenhouse technology stands to benefit from recent innovations in closely related fields such as photovoltaics (PV) and energy‐efficient buildings, such as luminescent solar concentrators (LSCs), [ 4–6 ] semi‐transparent organic semiconductors, [ 7–9 ] smart windows, [ 10–13 ] and self‐cleaning windows. [ 14,15 ] Additionally, several adaptations could also be derived from developments in technologies like photon upconversion [ 16–19 ] or quantum dots (QDs), [ 20–24 ] which are commonly applied in diverse fields like bioimaging, biosensing, optical devices, or display technology.…”

Section: Introductionmentioning

confidence: 99%

“…In the past few years, with increasing focus on sustainable development goals and the energy transition, new materials, technologies and developments have emerged that might enable further fine-tuning of the incident sunlight in greenhouses, in terms of both intensity and spectrum. [3] Greenhouse technology stands to benefit from recent innovations in closely related fields such as photovoltaics (PV) and energy-efficient buildings, such as luminescent solar concentrators (LSCs), [4][5][6] semi-transparent organic semiconductors, [7][8][9] smart windows, [10][11][12][13] and self-cleaning windows. [14,15] Additionally, several adaptations could also be derived from developments in technologies like photon upconversion [16][17][18][19]…”

Section: Introductionmentioning

confidence: 99%

Technology and Materials for Passive Manipulation of the Solar Spectrum in Greenhouses

Mishra

Stanghellini

Hemming

2023

Advanced Sustainable Systems

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Greenhouse horticulture grows increasingly important due to its ability to provide a controlled microclimate which is optimizable for highly efficient crop growth and resource use, although it may come at a significant energy and investment cost. One of the most crucial inputs in any greenhouse is sunlight, giving free energy and light for greenhouse crop growth. However, it is enormously variable, both geographically and seasonally. This review discusses materials and technologies usable in greenhouse cover and screen materials which can passively manipulate the incident sunlight to transmit a light spectrum that is ideal for crop growth, thereby improving the yield, and for greenhouse microclimate management, thereby reducing the energy usage of greenhouses. The current status of spectrum‐manipulating technology in greenhouses, developments over the last few years, some potential innovations adaptable from diverse fields to greenhouse horticulture, and the associated challenges, are discussed.

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“…Moreover, most research studies discussed above are based on studies on static normal sunlight and have overlooked the variation of sunlight incident angles during different seasons. To be exact, the oblique sunlight is different from normal sunlight, at least in the following three aspects: solar radiation intensity, input power density, and reflectance of glass . In consideration of the incident light with different angles, constructing the surface morphology of a smart windows may be an effective strategy to modulate the solar transmission.…”

Section: Introductionmentioning

confidence: 99%

“…To be exact, the oblique sunlight is different from normal sunlight, at least in the following three aspects: solar radiation intensity, 24 input power density, 25 and reflectance of glass. 26 In consideration of the incident light with different angles, constructing the surface morphology of a smart windows may be an effective strategy to modulate the solar transmission. For example, 3D-printed VO 2 /W-doped VO 2 nanoparticles have successfully regulated the solar irradiation adaptively with the solar elevation angle.…”

Section: Introductionmentioning

confidence: 99%

Deformable Thermo-Responsive Smart Windows Based on a Shape Memory Polymer for Adaptive Solar Modulations

Zhou

Meng

et al. 2021

ACS Appl. Mater. Interfaces

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Thermo-responsive smart windows that control solar transmission are expected to be the promising solution to excessive building energy consumption and overheating of solar cell devices. The two performance indices, namely, the luminous transmission (T lum ) and the solar modulation (ΔT sol ), are often intrinsically limited by conventional thermo-responsive materials, which restrict their applications in smart windows. Alternatively, constructing a deformable surface morphology of smart windows can be an effective strategy to modulate the solar transmission.Here, we report a new category of thermo-responsive smart windows with a deformable surface morphology, which can be custom designed to achieve both desirable ΔT sol and T lum according to the sunlight incident angles of actual applications. This design is based on a thermo-responsive shape memory polymer and an optical coating, which is termed the butterfly-wing-like smart window (BSW). The BSW reversibly transforms from a temporary shape of flat topography to a predefined original shape of tilted configuration upon heating. It is demonstrated that the BSW has a high ΔT sol of 32.6% and an excellent T lum(average) of 64.5%. This work provides a new design strategy and mechanism for thermo-responsive smart windows.

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Multilayer angular optical filter as a smart window

Cited by 8 publications

References 50 publications

Novel smart window using photonic crystal for energy saving

Novel smart window using photonic crystal for energy saving

Technology and Materials for Passive Manipulation of the Solar Spectrum in Greenhouses

Deformable Thermo-Responsive Smart Windows Based on a Shape Memory Polymer for Adaptive Solar Modulations

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