Glazing systems with Parallel Slats Transparent Insulation Material (PS-TIM): Evaluation of building energy and daylight performance

Sun, Yanyi; Liang, Runqi; Wu, Yupeng; Wilson, Robin; Rutherford, Peter

doi:10.1016/j.enbuild.2017.10.026

Cited by 33 publications

(24 citation statements)

References 24 publications

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“…Useful daylight illuminance (UDI) was used to evaluate the daylight performance affected by the two types of GC windows and reference double glazing (DG) under the five tested climatic conditions. UDI is one of the metrics used to quantify the daylighting availability through window systems and has been extensively used in previous research (Nabil and Mardaljevic 2006;Berardi and Anaraki 2015;Sun et al 2018). UDI is expressed as the fraction of time when the indoor horizontal daylight illuminance at a specific position falls into a given illuminance range (bins); the bins were defined by splitting the analysed period into lower and upper limits.…”

Section: The Impact Of Gc Windows On the Building's Daylight Performancementioning

confidence: 99%

“…Many efforts have been made to improve the building performance of window systems, and these are mainly in two directions: (1) for increased thermal resistance, such as using inert gases as cavity fill, multiple glass panes, low emissivity coatings, vacuum glazing and aerogel glazing; and (2) controlling solar radiation and daylight entering the room by introducing tinted coatings, reflective coatings, shading devices and switchable glazing (e.g. electrochromic (EC), thermochromic (TC) and gasochromic (GC)) (Sun et al 2018;Zhang et al 2016;Peng et al 2015;Liang et al 2018). Amongst all the technologies that control solar radiation, switchable glazing shows advantages as their thermal and/or optical properties are variable, which makes them capable of reacting to environmental changes.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Mg-Y coated gasochromic smart windows for building applications

et al. 2018

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In the purpose of improving indoor comfort and achieving building energy conservation, significant efforts have been made to improve the performance of window systems. Smart windows have been increasingly considered as an efficient technology with adjustable control of their thermal and/or optical properties in response to instant changes of the environment. This paper explores the potential of using a durable Mg-Y based switchable mirror gasochromic (GC) material for building window applications. The selected Mg-Y based GC window provides a degree of flexibility to reflect the undesirable incident solar radiation rather than the other types of GC windows, which absorb the solar heat that might eventually go into the indoor space through convective, conductive and radiative heat transfer. Building simulations were carried out for a typical office with Mg-Y GC window applied using EnergyPlus. The characterization of the selected gasochromic smart window and its impact on building performance was comprehensively studied under 5 diverse climates in China. In addition, various control strategies in response to different environmental conditions or indoor comfort criteria are also considered. The results indicated that Mg-Y based films with excessively low transmittance at the reflective state are not beneficial from the perspective of building energy conservation, while potentially developed Mg-Y windows with relative higher transmittance and larger transmittance modulation can yield energy conservation of up to 27% when compared with standard double glazing. Overall, the work presented in this paper may be seen as offering potential advice and guidance on further development of switchable mirror GC material that seek to be applied into building windows for amplifying improvements in energy efficiency and occupant comfort.

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Section: The Impact Of Gc Windows On the Building's Daylight Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Mg-Y coated gasochromic smart windows for building applications

et al. 2018

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“…Nevertheless, it should be noted that the concrete thermal mass that the authors used did affect the level of natural illumination through the DSF. Without losing the daylight benefits of DSF, Sun et al [20,21] investigated a DSF integrated with parallel slat…”

Section: Background and Related Studiesmentioning

confidence: 99%

Phase change material blind system for double skin façade integration: System development and thermal performance evaluation

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Kokogiannakis

et al. 2019

Applied Energy

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“…Daylighting performance is a key factor to be considered when designing window systems for buildings that are required to satisfy demands of low energy consumption and high occupancy comfort [81]. Useful daylighting illuminance (UDI) is a metric which is used to evaluate the daylighting performance of window systems and has been extensively used in previous research [81][82][83]. The concept of UDI refers to a climatedata based range of illuminance and it could be divided into three bins which are <100 lux, 100-2000 lux and >2000 lux.…”

Section: Equationmentioning

confidence: 99%

Optical aspects and energy performance of switchable ethylene-tetrafluoroethylene (ETFE) foil cushions

et al. 2018

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A pneumatic multilayer foil construction with a kinetic shading mechanism has the potential to be an effective response to dynamic climatic factors, such as solar radiation, and therefore moderate the energy consumption of buildings. A parametric study was carried out on a switchable ethylene-tetrafluoroethylene (ETFE) foil cushion with the purpose of investigating the optical performance of an adaptive building envelope and its impact on building energy performance regarding heating, cooling and lighting. Ray-tracing techniques were used to investigate the effects of surface curvature, frit layout and frit properties, on the optical performance of the cushion in open and closed mode. A range of incidence angles for solar radiation were simulated. The results of the simulation showed an angle dependent optical behaviour for both modes. The influence of the dynamic shading mechanism on building energy performance was further evaluated by integrating the optical data obtained for the ETFE foil cushions in a comprehensive energy simulation of a generic atrium building using EnergyPlus. Results suggested that switchable ETFE foil cushions have a higher potential to reduce cooling and heating loads in different climatic regions, compared to conventional glazing solutions (i.e. uncoated double-glazing and reflective double-glazing), while providing good conditions of natural daylighting. Annual energy savings of up to 44.9% were predicted for the switchable ETFE foil cushion in comparison to reflective double glazing. As such, this study provides additional insight into the optical behaviour of multilayer foil constructions and the factors of design and environment that potentially have a major impact on buildings energy performance.

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Glazing systems with Parallel Slats Transparent Insulation Material (PS-TIM): Evaluation of building energy and daylight performance

Cited by 33 publications

References 24 publications

Investigation of Mg-Y coated gasochromic smart windows for building applications

Investigation of Mg-Y coated gasochromic smart windows for building applications

Phase change material blind system for double skin façade integration: System development and thermal performance evaluation

Optical aspects and energy performance of switchable ethylene-tetrafluoroethylene (ETFE) foil cushions

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