Effect of atmospheric transmittance on performance of adaptive SPD-vacuum switchable glazing

Ghosh, Aritra; Norton, Brian; Duffy, Aidan

doi:10.1016/j.solmat.2016.12.022

Cited by 36 publications

(17 citation statements)

References 37 publications

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“…Windows are one of the weakest components in a building. It allows external heat to come inside (enhance the air condition load), internal heat to outside (enhance heating load) and offer visual connection to building interior to exterior [172][173][174][175][176][177][178][179][180][181][182][183][184][185]. Building window systems are affected by an overall heat transfer coefficient (U-value) and solar energy transmittance (g-value) [186][187][188][189].…”

Section: Perspective and Discussionmentioning

confidence: 99%

Status of BIPV and BAPV System for Less Energy-Hungry Building in India—A Review

et al. 2020

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The photovoltaic (PV) system is one of the most promising technologies that generate benevolent electricity. Therefore, fossil fuel-generated electric power plants, that emit an enormous amount of greenhouse gases, can be replaced by the PV power plant. However, due to its lower efficiency than a traditional power plant, and to generate equal amount of power, a large land area is required for the PV power plant. Also, transmission and distribution losses are intricate issues for PV power plants. Therefore, the inclusion of PV into a building is one of the holistic approaches which reduce the necessity for such large land areas. Building-integrated and building attached/applied are the two types where PV can be included in the building. Building applied/attached PV(BAPV) indicates that the PV system is added/attached or applied to a building, whereas, building integrated PV (BIPV) illustrates the concept of replacing the traditional building envelop, such as window, wall, roof by PV. In India, applying PV on a building is growing due to India’s solar mission target for 2022. In 2015, through Jawaharlal Nehru National Solar Mission, India targeted to achieve 100 GW PV power of which 40 GW will be acquired from roof-integrated PV by 2022. By the end of December 2019, India achieved 33.7 GW total installed PV power. Also, green/zero energy/and sustainable buildings are gaining significance in India due to rapid urbanization. However, BIPV system is rarely used in India which is likely due to a lack of government support and public awareness. This work reviewed the status of BIPV/BAPV system in India. The BIPV window system can probably be the suitable BIPV product for Indian context to reduce the building’s HVAC load.

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Section: Perspective and Discussionmentioning

confidence: 99%

Status of BIPV and BAPV System for Less Energy-Hungry Building in India—A Review

et al. 2020

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“…These glazing can be electrically, thermally, or chemically actuated. Electrical actuation of switchable glazings EC, SPD, and LC gives control of the switchability of glazing [30][31][32][33][34]. EC glazing changes its transparency from transparent to opaque state in the presence of direct current power supply.…”

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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“…Electrically actuated switchable material filled double glazings in such large façade applications offer better control when compared with non-electrically activated switchable glazing. In additions, electrically actuated switchable glazings  offer more than one transmittance and intermittence transmittance by applying variable power [6][7][8][9];  can control glare [7][8][9][10];  provide daylight where spectrum has a positive influence on occupant comfort [8][9][10];  can be powered by connected with PV [11][12][13][14][15];  addition with vacuum glazing [16][17][18] electrically activated glazing can form a low heat loss switchable glazing [19][20][21][22][23][24][25];…”

Section: Introductionmentioning

confidence: 99%

“…Theoretically, the relation between glazing transmission and clearness index was investigated for selected European locations and surface orientations by Waide and Norton [53]. Experimentally correlations between SPD glazing [54], vacuum glazing [17] and SPD-vacuum glazing [19] with clearness index had also been investigated.…”

Section: Introductionmentioning

confidence: 99%

Influence of atmospheric clearness on PDLC switchable glazing transmission

Ghosh

Norton²,

Mallick

2018

Energy and Buildings

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1 Highlights: Correlation between PDLC glazing transmittance and sky clearness index has been calculated.  Transmitted solar energy and SHGC were evaluated for different clearness index.  Single glazing transmittance was recommended for different azimuthal orientation of vertical plane PDLC glazing. ACCEPTED MANUSCRIPTA C C E P T E D M A N U S C R I P T Abstract:Electrically activated switchable polymer dispersed liquid crystal (PDLC) is suitable for adaptive windows. A particular type requires 20V to become 71% transparent while in the absence of power it is 27% transparent. Glazing transmission changes with light incident angle. As the clearness of a sky changes the fraction changes alter of direct insolation (that has an azimuthally changing incident) and diffuse insolation (that has a largely constant incident). Thus, the effective overall incident angle determining the glazing transmittance also changes. In this work for the first time, the variation of

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Effect of atmospheric transmittance on performance of adaptive SPD-vacuum switchable glazing

Cited by 36 publications

References 37 publications

Status of BIPV and BAPV System for Less Energy-Hungry Building in India—A Review

Status of BIPV and BAPV System for Less Energy-Hungry Building in India—A Review

Daylight characteristics of a polymer dispersed liquid crystal switchable glazing

Influence of atmospheric clearness on PDLC switchable glazing transmission

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