Thermotropic glass with active dimming control for solar shading and daylighting

Inoue, Takashi; Ichinose, Masayuki; Ichikawa, Naoyoshi

doi:10.1016/j.enbuild.2007.03.006

Cited by 20 publications

(7 citation statements)

References 3 publications

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“…Different kinds of TT smart windows have been reported, and they can be categorized according to their switching mechanism. 13,14 These mechanisms include phase separation, 10,12,15,16 aggregation, 17 changes in the particle size, 18 and phase transition 19−21 of the constituents. Among the various TT candidates, hydrogels working on the basis of phase separation exhibited the best performance in terms of optical switching characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…For energy conservation, immense effort had been channeled into the development of smart windows with different modes of activation, such as photochromic, gasochromic, electrochromic, thermochromic, and thermotropic (TT) − smart windows. Among them, the TT system is incredibly attractive because solar energy itself can be used as a promoter against solar shielding.…”

Section: Introductionmentioning

confidence: 99%

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A Dual-Responsive Nanocomposite toward Climate-Adaptable Solar Modulation for Energy-Saving Smart Windows

Lee

Cai

et al. 2017

ACS Appl. Mater. Interfaces

116

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In this work, a novel fully autonomous photothermotropic material made by hybridization of the poly(N-isopropylacrylamide) (PNIPAM) hydrogel and antimony-tin oxide (ATO) is presented. In this photothermotropic system, the near-infrared (NIR)-absorbing ATO acts as nanoheater to induce the optical switching of the hydrogel. Such a new passive smart window is characterized by excellent NIR shielding, a photothermally activated switching mechanism, enhanced response speed, and solar modulation ability. Systems with 0, 5, 10, and 15 atom % Sb-doped ATO in PNIPAM were investigated, and it was found that a PNIPAM/ATO nanocomposite is able to be photothermally activated. The 10 atom % Sb-doped PNIPAM/ATO exhibits the best response speed and solar modulation ability. Different film thicknesses and ATO contents will affect the response rate and solar modulation ability. Structural stability tests at 15 cycles under continuous exposure to solar irradiation at 1 sun intensity demonstrated the performance stability of such a photothermotropic system. We conclude that such a novel photothermotropic hybrid can be used as a new generation of autonomous passive smart windows for climate-adaptable solar modulation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Dual-Responsive Nanocomposite toward Climate-Adaptable Solar Modulation for Energy-Saving Smart Windows

Lee

Cai

et al. 2017

ACS Appl. Mater. Interfaces

116

View full text Add to dashboard Cite

show abstract

“…A number of previous studies have considered the interrelation between day light performance and thermal performance such as R. Sullivan et al (1992) [1] and C. A. Johnson et al (1999) [2] and more recently Ochoa et al (2012) [3], Tsikaloudak et al (2012) [4], Aldawoud (2013) [5], Lee and Tavil (2007) [6], Inoue et al (2008) [7], Athienitis and Tzempelikos (2002) [8].…”

Section: Introductionmentioning

confidence: 99%

A New Dynamic Climate-Based Daylight Metric for Sustainable Building Design in Hot Climates

Mahmoud¹,

Mashaly²,

Rashed³

et al. 2016

MESE

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Daylight performance metrics are moving away from the traditional daylight factor and average illuminance to more climatic-based metrics such as Daylight Autonomy (DA) and Useful Daylight Index (UDI). These metrics offer a better measure of the daylight performance throughout the year and incorporate the varying weather conditions and as such are dubbed climatic-based metrics. However, in hot climates where the ratio of direct to diffuse is highest, achieving these metrics may result in overheating the spaces. Achieving acceptable climatic-based metrics for the space may result in unacceptable heat gains. The Day light Autonomy and the Useful Daylight Index do not account for the total amount of lux-hours achieved throughout the year. The solution thus far has been to run coupled-energy and daylight simulations and in order to assess the effect of achieving certain climatic-based metrics on the heat gain and thermal performance of the space. In this paper a new metric is proposed that takes into account the total amount of lux-hours achieved throughout the year and the irradiation for different time step into a single measure. Details about the measure and sample test cases are presented.

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“…Termokromik camların bağımsız olarak kontrolü zordur[42]. Termokromik camın değişik durumlarda görünümleri[43].…”

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Cam Yüzey Kaplama Teknolojileri

Karasu

Saricaoğlu

2018

El-Cezeri Fen Ve Mühendislik Dergisi

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Cam, keşfedildiği dönemden günümüze dek çok farklı uygulama alanlarına sahip olmuş ve her geçen gün gelişen teknoloji sayesinde ilerleme kaydetmiştir. Cam yüzeylere uygulanan kaplama yöntemleri sayesinde, üretilen cam malzemeler mevcut özelliklerinin ötesinde daha fazla işlevsellik edinmişler, böylece, dış ortam koşullarına karşı (ısı, ışık, zararlı ışınlar, basınç) daha yüksek dayanım sergilemeye başlamışlardır. Bu çalışmada da, cam yüzey kaplamaları hakkında kısa bir tanımlama yapılmış, kaplama teknolojilerinin geçmişten günümüze tarihsel gelişiminden bahsedilmiş, örneklerle cam yüzeyine uygulanan kaplama yöntemlerinden söz edilmiş, kaplama çeşitleri üzerinde durulmuş ve yüzey kaplama teknolojilerindeki son gelişmelere değinilmiştir.

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Thermotropic glass with active dimming control for solar shading and daylighting

Cited by 20 publications

References 3 publications

A Dual-Responsive Nanocomposite toward Climate-Adaptable Solar Modulation for Energy-Saving Smart Windows

A Dual-Responsive Nanocomposite toward Climate-Adaptable Solar Modulation for Energy-Saving Smart Windows

A New Dynamic Climate-Based Daylight Metric for Sustainable Building Design in Hot Climates

Cam Yüzey Kaplama Teknolojileri

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