Experimental analysis of the energy performance of a full-scale PCM glazing prototype

Goia, Francesco; Perino, Marco; Serra, Valentina

doi:10.1016/j.solener.2013.12.002

Cited by 138 publications

(79 citation statements)

References 46 publications

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“…The insertion of a PCM layer in place of an empty (air-filled) cavity does not substantially impair the good thermal resistance performance of the 31 system, and results in an increase in the (equivalent) thermal transmittance of approximately 10%. A relevant increase in the thermal transmittance was previously verified for a case of a double glazing unit filled with PCM (Goia et al, 2014b). However, in the case of a triple glazed layout, it seems that having just one of the two cavities filled with air (and coupled to a low-emissivity coating) is enough to assure a satisfactory thermal resistance to the assembly.…”

Section: Conventional Metricsmentioning

confidence: 89%

“…Another way to achieve dynamic behaviour of glazing systems is by introducing a phase change material (PCM) within the gap of a double (Goia et al, 2014b;Gowreesunker et al, 2013) or triple glazing unit (S. , or within more-complex glazing components (Grynning et al, 2015(Grynning et al, , 2013. PCMs in glazing systems notably increase their inertial behaviour, smoothing the indoor surface temperature and providing peak load shifting.…”

Section: Introductionmentioning

confidence: 99%

“…The performance of PCM-enhanced glazing components was investigated by several experimental (Goia et al, 2014bGowreesunker et al, 2013;S. Li et al, 2016) and numerical (Goia, 2012;Ismail et al, 2008;Zhong et al, 2015) studies.…”

Section: Introductionmentioning

confidence: 99%

“…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).…”

Section: Introductionmentioning

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: Conventional Metricsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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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“…and from experimental analyses [18]. With this set-up, the absorptance appears to be the dominant feature in 267 both the visible and infrared (IR) range.…”

Section: Table 2 264mentioning

confidence: 98%

Spectral and angular solar properties of a PCM-filled double glazing unit

Goia

Zinzi

Carnielo

et al. 2015

Energy and Buildings

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105

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Investigations on thermal and optical performances of a glazing roof with PCM layer

Liu

et al. 2017

Int J Energy Res

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Summary The thermal and optical performances of a roof in a building containing phase change material (PCM) were investigated in this paper. The glazing roof model consists of two layers of glass and one layer of PCM. The purpose of filling the roof structure with PCM is to utilize the solar energy efficiently. The effectiveness of thermal and optical performances of the roof PCM system was determined by analyzing the heat flux and temperature at the indoor surface with different absorption coefficients and refractive index of PCM in solid and liquid states. The results show that the absorption coefficients and refractive index of solid and liquid PCMs have both effects on thermal performance in the roof PCM system. Of all the thermal performances, the effect on internal temperature, temperature lag, and total transmitted energy is smaller and the effect on solar transmittance and transmitted solar energy is bigger. The absorption coefficients have the opposite effect with the refractive index on interior temperature lag. Considering the indoor daylight, increasing the refractive index and absorption coefficient of liquid PCM is a better method to better the thermal performance of a roof PCM system. Copyright © 2017 John Wiley & Sons, Ltd.

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Experimental analysis of the energy performance of a full-scale PCM glazing prototype

Cited by 138 publications

References 46 publications

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

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

Spectral and angular solar properties of a PCM-filled double glazing unit

Investigations on thermal and optical performances of a glazing roof with PCM layer

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