Solar radiation manipulations and their role in greenhouse claddings: Fresnel lenses, NIR- and UV-blocking materials

Lamnatou, Chr.; Chemisana, Daniel

doi:10.1016/j.rser.2012.09.041

Cited by 81 publications

(57 citation statements)

References 72 publications

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“…Moreover, the plants in the greenhouse covered with diffused film were healthy compared to the clear film greenhouse during summer season. Lamnatou and Chemisana also observed the same results that diffused light have the ability to penetrate deeper into a plant canopy in comparison to the direct light [38,39]. The seasonal variation of solar radiation, affect variations in the crop response.…”

Section: Effect Of Cladding Materials On Biometric Response Of Dutch mentioning

confidence: 65%

“…The PAR is essential for photosynthesis which is favourable to plants growth. Thus, greenhouse cladding films which diffuse the incoming solar radiation can offer several advantages and provide better micro climate (Chou and Lee [36], Kondratyev [37], Lamnatou and Chemisana [38,39], Espí et al [40]). Soil temperature in the greenhouses cladded with clear and diffused film at 25 cm depth during winter season ranged from 19 to 21°C and 18 to 21°C respectively.…”

Section: Micro Climate Behavior Of Greenhouse Cladded With Uv Stabilimentioning

confidence: 99%

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Estimation of Crop Coefficient and Water Requirement of Dutch Roses (Rosa hybrida) under Greenhouse and Open Field Conditions

Singh¹,

Tiwari²,

Dt³

2016

Irrigat Drainage Sys Eng

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Section: Effect Of Cladding Materials On Biometric Response Of Dutch mentioning

confidence: 65%

Section: Micro Climate Behavior Of Greenhouse Cladded With Uv Stabilimentioning

confidence: 99%

Estimation of Crop Coefficient and Water Requirement of Dutch Roses (Rosa hybrida) under Greenhouse and Open Field Conditions

Singh¹,

Tiwari²,

Dt³

2016

Irrigat Drainage Sys Eng

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“…Considerable interest is evinced in recent years in the design of near-infrared absorbing organic azo dyes. They find manifold applications in the high technology areas such as dye sensitized solar cells (DSSCs) [15], laser optical storage systems [16], clear coatings [17], organic photovoltaics [18], greenhouse claddings [19], molecular switches [20], NIR-active materials [21], colorimetric sensors [22], mesomorphic [23], solvatochromic [24][25][26], and electrochemical materials [27] and surface relief grating (SRG)-forming azo polymer films [28], laser-printing systems, laser filters, photography, photonics, and in telecommunication devices operating at wavelengths in the NIR region [29].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Optical Properties of Near-Infrared (NIR) Absorbing Azo Dyes

Patil¹,

Chaudhary²

2020

Chemistry and Technology of Natural and Synthetic Dyes and Pigments

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This chapter provides a general overview and information on near-infrared (NIR) absorbing azo dyes. In this work, we have developed an efficient and simple protocol for the synthesis of novel A-π-D-π-A NIR azo dyes. The near-infrared absorbing azo dyes were synthesized by using 2-hydroxy-1,4 naphthoquinone (Lawsone) and different substituted aromatic primary amines. Furthermore, author developed push-pull chromophores of A-π-D-π-A type containing an electron-withdrawing azo core, phenazine moieties, and a hydroxyl group as electron donor. The benzo[a]quinoxalino[2,3-i]phenazin-5-ol moiety was introduced to make the system planer as well as to increase the π-conjugation. The optical properties of these dyes were studied in N,N-dimethylformamide (DMF).

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“…In a previous work, we had evaluated the performance of fluorescent PMMA thin-film LSCs for greenhouse applications [13]. These films absorb the greenyellow range of visible solar spectra (which is not absorbed by chlorophylls) and fluoresce it as red light which is necessary for the photosynthesis process [14]. These films were found to be promising photoselective claddings to increase the irradiance level for the photosynthesis process in greenhouses.…”

Section: Introductionmentioning

confidence: 99%

Red photoluminescent PMMA nanohybrid films for modifying the spectral distribution of solar radiation inside greenhouses

et al. 2016

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a b s t r a c tLuminescent solar concentrator (LSC) films based on Polymethylmethacrylate (PMMA) nanohybrids were prepared using free radical polymerization of MMA incorporated with oxide nanoparticles; SiO 2 , ZnO and TiO 2 . The effect of nano-oxide type was studied by Fourier transform infrared spectroscopy (FT-IR), UV eVis absorption and fluorescence spectroscopy measurements. The performance of LSC nanohybrid films was evaluated and optimized for photoselective greenhouse cladding applications in order to increase the plant productivity by changing the solar spectrum. It was found that ZnO nanohybrid LSC film had offered the best spectral properties for photosynthetic active radiation besides their excellent resistance to photo and thermal degradation especially in hot countries like KSA. Regarding thermal efficiency, the highest infrared (IR) efficiency has been found for silica nanohybrid LSC film, which reached about 83%. This result is promising to improve thermal efficiency in greenhouse claddings in cold regions and thermal covering systems like solar dryers and solar desalination systems.

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Solar radiation manipulations and their role in greenhouse claddings: Fresnel lenses, NIR- and UV-blocking materials

Cited by 81 publications

References 72 publications

Estimation of Crop Coefficient and Water Requirement of Dutch Roses (Rosa hybrida) under Greenhouse and Open Field Conditions

Estimation of Crop Coefficient and Water Requirement of Dutch Roses (Rosa hybrida) under Greenhouse and Open Field Conditions

Synthesis and Optical Properties of Near-Infrared (NIR) Absorbing Azo Dyes

Red photoluminescent PMMA nanohybrid films for modifying the spectral distribution of solar radiation inside greenhouses

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