Optical and Thermal Switching of Liquid Crystals for Self‐Shading Windows

Oh, Seung-Won; Kim, Sang‐Hyeok; Baek, Jong‐Min; Yoon, Tae Hoon

doi:10.1002/adsu.201700164

Cited by 43 publications

(30 citation statements)

References 27 publications

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“…Thanks to the self-alignment of LCs, the device can be fabricated simply by injection of the LC mixture into an empty cell without alignment treatments, UV curing, formation of structures, or integration of devices. In the SmA* phase, LCs are vertically self-aligned, as demonstrated by polarized microscope and conoscopic images in Figure 3, because of the natural property of LCs in the SmA* phase and the homeotropic boundary condition [13][14][15]. The initial focal conic state in N* can be obtained with homeotropic boundary conditions of LC cell.…”

Section: Resultsmentioning

confidence: 92%

43‐4: Self‐Shading with Optically‐ and Thermally‐Switchable Liquid Crystals

Kim

Baek

et al. 2018

Symp Digest of Tech Papers

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Self-shading by optical or thermal switching between transparent and opaque states is achieved by liquid crystals doped with push-pull azobenzene and can be used for energysaving smart windows. The self-shading light shutter is transparent during cool weather or under weak sunlight, which could save the energy used for heating and lighting, and can be switched from the transparent to opaque states during warm weather or under strong sunlight, saving energy used for cooling.

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Section: Resultsmentioning

confidence: 92%

43‐4: Self‐Shading with Optically‐ and Thermally‐Switchable Liquid Crystals

Kim

Baek

et al. 2018

Symp Digest of Tech Papers

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“…Therefore, these two aspects are also the key points of energy-saving renovation. The main materials, equipment and technology used in residential buildings in the province are not significantly different from those in developed areas or even abroad [14], and the main gap lies in the design standards. Therefore, the transformation of envelope structure is one of the key points of building energy-saving transformation.…”

Section: Research On Current Energy Consumption Characteristics Of Hementioning

confidence: 99%

Heat consumption analysis and energy-saving renovation of building heating in high sunshine heating area

Zhan

Zhang

2020

THERM SCI

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In order to explore the effect and influence of energy-saving renovation on buildings in high sunshine heating area, the method of visit survey is used. The main scope of reconstruction includes: building windows, walls, door joints, pipe network, insulation measures, etc. The heat consumption of buildings, the comprehensive effect of improvement, and the satisfaction of residents are studied. The results show that after the energy-saving renovation of buildings and equipment in the heating area, compared with before the renovation, the residents' awareness of saving heating has been greatly improved and the waste has been significantly reduced. With the decrease of heating economic expenditure, people are more satisfied with energy-saving renovation. Both heating companies and individual users have been relatively large expenditure reduction. To sum up, it is very important to improve the energy efficiency of buildings in high sunshine heating area. After the energy-saving renovation of the building, not only the awareness of saving is improved, but also the consumption of resources are reduced, so that more people can enjoy the warmth. A win-win situation in the cost of users and heating companies is achieved. This study has a positive effect on the follow-up research of building energy-saving renovation in heating area.

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“…The built environment is a large consumer of electricity, with 76% being spent in residential and commercial buildings [1], around half of this on electricity for heating/cooling and lighting [2]. One way to reduce the amount of energy spent on heating and cooling is by controlling the amount of incoming sunlight using "smart windows" [3,4] which can change their transmissivity in response to stimuli, including heat [5][6][7], electricity [4,8,9] and light [10][11][12]. In addition, using excess sunlight to generate electricity can even result in energy-generating windows [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Dual Thermal-/Electrical-Responsive Luminescent ‘Smart’ Window

et al. 2020

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As buildings are a large energy user, it is important to not only reduce their consumption, but also have them generate their own electricity. Here, we describe a smart window that could reduce electricity consumption, normally used for air conditioning and lighting, by absorbing excess solar radiation with dichroic fluorescent dye molecules aligned in a switchable liquid crystal host and guiding the re-emitted light energy to the edges of the device, where it can be used to generate electricity via attached photovoltaic cells. The liquid crystals are responsive both to temperature changes and applied electrical fields. At higher temperatures, transmission decreases due to increased disorder in the liquid crystals, while the application of an electrical field increases transmission by effectively realigning the dyes for minimal absorption. Using alternative configurations, a window with a transparent rest state was also produced, in which transmission can be decreased by applying an electrical field; the thermal response remains identical.

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Optical and Thermal Switching of Liquid Crystals for Self‐Shading Windows

Cited by 43 publications

References 27 publications

43‐4: Self‐Shading with Optically‐ and Thermally‐Switchable Liquid Crystals

43‐4: Self‐Shading with Optically‐ and Thermally‐Switchable Liquid Crystals

Heat consumption analysis and energy-saving renovation of building heating in high sunshine heating area

Dual Thermal-/Electrical-Responsive Luminescent ‘Smart’ Window

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