Measured overall heat transfer coefficient of a suspended particle device switchable glazing

Ghosh, Aritra; Norton, Brian; Duffy, Aidan

doi:10.1016/j.apenergy.2015.09.019

Cited by 95 publications

(55 citation statements)

References 48 publications

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“…The variation of spectral transmission with wavelength of an SPD glazing in transparent and opaque states, measured in a laboratory using AvaSpec-ULS2048L Star Line Versatile Fiber-optic spectrometer [22][23][24] as shown in Fig. 3.…”

Section: Measurements and Resultsmentioning

confidence: 99%

“…Horizontal plane global solar radiation, horizontal plane diffuse solar radiation, vertical plane global solar radiation was measured using Kipp and Zonen pyranometers [21][22][23][24][25]. 5 min interval data were recorded using delta T type data logger.…”

Section: Measurements and Resultsmentioning

confidence: 99%

“…1. An SPD glazing will have intermediate transparency, for the particular example chosen, between 5-55% when the applied AC voltage is set between 0 and 100 V [24,25]. The daylighting and thermal performance of an SPD glazing showed that SPD glazing is superior over other glazing applications in building [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Effect of sky conditions on light transmission through a suspended particle device switchable glazing

Ghosh¹,

Norton²,

Duffy³

2017

Solar Energy Materials and Solar Cells

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. (2017) Effect of sky conditions on light transmission through a suspended particle device switchable glazing. Solar Energy Materials and Solar Cells, Volume 160, February 2017, Pages 134-140. doi:10.1016/ j.solmat.2016 ABSTRACTA suspended particle device (SPD) switchable glazing changes its state from opaque to transparent in the presence of a power supply. SPD glazing's near normal transmission varies with incident angle and clearness index. Due to a lower diffuse component, higher glazing transmission ensues at higher clearness indices. Transmittance values for different azimuthal incident angle for a SPD glazing for its "transparent" and "opaque" states have been determined. In Dublin, below 0.5 clearness index, isotropic diffuse transmittance was prevailed while transmission of direct insolation was dominant above 0.5 clearness index. For south facing vertical plane SPD glazing transmittance in its transparent and opaque states are 0.25 and 0.025 respectively while clearness index is below 0.5.

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Section: Measurements and Resultsmentioning

confidence: 99%

Section: Measurements and Resultsmentioning

confidence: 99%

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Effect of sky conditions on light transmission through a suspended particle device switchable glazing

Ghosh¹,

Norton²,

Duffy³

2017

Solar Energy Materials and Solar Cells

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“…2. All illuminance sensors had a 350 350-820 nm sensitivity spectral range with a spectral response curve adapted to human eye sensitivity [25,26,50]. Data were recorded at 1 min intervals.…”

Section: Wherementioning

confidence: 99%

“…Comfort Working space [13] 500 Comfortable Office work [14] 500 Comfortable Office work [15] 840-2146 (morning) 840-2146 (morning) Comfortable Office work [4,5,15] 782-1278 (afternoon) 782-1278 (afternoon) Comfortable 700-1800 700-1800 Comfortable Computer work [16] 100-2000 100-2000 Useful Daylight Illuminance Any types of work [12] Switchable glazing includes electrochromic (EC) [17][18][19], gasochromic [20], thermochromic [21], thermotropic [22,23], liquid crystal (LC) [24], suspended particle device (SPD) [25][26][27][28] and phase change materials (PCM) [29]. These glazing can be electrically, thermally, or chemically actuated.…”

Section: Introductionmentioning

confidence: 99%

Daylight characteristics of a polymer dispersed liquid crystal switchable glazing

Ghosh

Norton²,

Mallick

2018

Solar Energy Materials and Solar Cells

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Smart Thermally Switchable Liquid Crystal Window

Jiang

Zhou

Wang

et al. 2021

Advanced Photonics Research

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Global warming, due to the consumption of fossil energy, is one of the biggest challenges in recent days. Air conditioning (cooling and heating) of office and residential buildings is one of the largest energy consumptions. One way to reduce the energy consumption is to use switchable architectural windows, which can control radiant energy flow. Herein, a smart thermally switchable window with transmittance sensitive to ambient temperature is reported. This smart window is based on a liquid crystal (LC) whose orientation varies with temperature. At temperatures lower than a low threshold temperature, such as in winter, the LC orients perpendicular to the window substrate, and the window is transparent and lets sunlight pass it to warm interiors of buildings. At temperatures higher than a high threshold temperature, such as in summer, the LC orients parallel to the substrate. The window becomes absorbing and blocks sunlight, resulting in a reduction of the solar heating. When temperature varies between these two thresholds, the window has gray‐level transmittances. It does not use electricity and is very energy‐saving, and has an immense potential in applications of smart architectural and vehicle windows.

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Measured overall heat transfer coefficient of a suspended particle device switchable glazing

Cited by 95 publications

References 48 publications

Effect of sky conditions on light transmission through a suspended particle device switchable glazing

Effect of sky conditions on light transmission through a suspended particle device switchable glazing

Daylight characteristics of a polymer dispersed liquid crystal switchable glazing

Smart Thermally Switchable Liquid Crystal Window

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