Responsive glazing systems: Characterisation methods and winter performance

Bianco, Lorenza; Cascone, Ylenia; Goia, Francesco; Perino, Marco; Serra, Valentina

doi:10.1016/j.solener.2017.06.029

Cited by 25 publications

(25 citation statements)

References 27 publications

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“…The complete description of materials, technologies and experimental test rig was presented in Bianco et al (2017 that were pre-calibrated in the laboratory. Heat flux meters and pyranometers were used to measure the heat and solar fluxes for each glazing (see Figure 3 in Bianco et al (2017) for the position of the sensors).…”

Section: Methods and Parametersmentioning

confidence: 99%

“…Heat flux meters and pyranometers were used to measure the heat and solar fluxes for each glazing (see Figure 3 in Bianco et al (2017) for the position of the sensors). The TGU, TGU_TT and TGU_TT+PCM technologies were tested simultaneously; however, the TGU_TT+PCM was alternately monitored with the PCM in the inner and outer cavity by rotating the prototype.…”

Section: Methods and Parametersmentioning

confidence: 99%

“…The PCM is tested in both the inner and the outer cavity of the glazing, alternately. In this paper, the summer performance of these responsive glazing systems is reported, complementing the assessment of their performance under winter conditions, which was previously presented in another paper (Bianco et al, 2017). Two additional systems were also tested in parallel for reference purposes: a triple glazing unit with a thermotropic layer only, and a reference triple glazing unit.…”

Section: Introductionmentioning

confidence: 90%

“…In addition, seasonal control of the direction of the heat flux released during the night-time discharging phase (mostly towards the indoor or outdoor environment) would be desirable (Goia et al, 2014b). To address this, a novel technology that combines a PCM-filled triple glazing unit with a thermotropic layer was proposed (Bianco et al, 2017;Goia et al, 2014a). The use of a thermotropic layer can offer better control of the charging phase of the PCM.…”

Section: Introductionmentioning

confidence: 99%

“…A comprehensive description of this technology and a detailed analysis of its performance during the winter seasons is presented in Bianco et al, (2017). In syntheses, the following key issues emerged during this study:…”

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confidence: 99%

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Responsive glazing systems: Characterisation methods, summer performance and implications on thermal comfort

et al. 2017

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Abstract:In recent years, there have been several experimental and numerical researches on transparent envelope components that integrate phase change materials (PCMs). To address some of the drawbacks of these systems, new prototypes were created and their summer performance was monitored under Cfa climatic conditions (Turin, Italy). The proposed glazing system comprises a triple glazing unit with a thermotropic layer placed on the outer side, acting as a switchable shading system capable of regulating the phase transition of the PCM. The PCM is tested in both the inner and the outer cavity of the glazing, alternately. In this paper, the summer performance of these responsive glazing systems is reported, complementing the assessment of their performance under winter conditions, which was previously presented in another paper (Bianco et al., 2017). Two additional systems were also tested in parallel for reference purposes: a triple glazing unit with a thermotropic layer only, and a reference triple glazing unit. Direct solar transmission was assessed, and the correlation between glazing temperature and solar transmission coefficient of the thermotropic layer, when coupled with the triple glazing unit, was derived. The solar transmission as a function of the external surface temperature of the PCM glazing units was also evaluated. The energy performance was assessed by means of a long-term evaluation in addition to daily analyses during cloudy and sunny days. The capability of the aforementioned technologies to improve indoor thermal comfort was investigated, with the effect of the transmitted solar radiation impinging on the occupants also taken into account. The results highlight that the integration of a thermotropic layer in a triple glazing unit allows the cooling load through the transparent component to be reduced by one third when compared to a traditional triple glazing unit. The overall energy performance was found to be primarily affected by the position of the PCM; not only during winter season, but especially in summer, the PCM completed the phase transition only when placed in the outermost cavity. The thermal comfort conditions were improved, when evaluated in terms of traditional PMV, regardless of the position of the PCM layer. However, when the influence of the direct solar radiation impinging on the occupants was taken into account, the solution with the PCM layer located in the inner cavity presented a better performance.

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Section: Methods and Parametersmentioning

confidence: 99%

Section: Methods and Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%