Modeling of the effect of nano-enhanced phase  change material on the performance of a large-scale wallboard

Benefitting from the characteristics of a high latent heat capacity and stable phase change behavior, phase change materials have widely received concerns in the field of thermodynamic management. Ba(OH)2·8H2O is an ideal phase change material (PCM) in the mid-to-low temperature range, but its large-scale application is still limited by severe supercooling during the nucleation process. In this paper, the experimental analysis and comparison are performed via an Edisonian approach, where Ba(OH)2·8H2O is adopted as an original substrate; BaCO3, CaCl2, NaCl, KH2PO4, and NaOH are selected as nucleating agents; and graphite is used as a heat-conducting agent. The results show that Ba(OH)2·8H2O containing 1.2% BaCO3 and 0.2% graphite powder has the best performance. Compared with pure Ba(OH)2·8H2O, the supercooling degree is reduced to less than 1 °C, the phase change latent heat duration is extended, and the thermal conductivity is significantly improved. Therefore, this study not only provides a reference for the application of Ba(OH)2·8H2O, but can also be used as a guidance for other material modifications.

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Large-scale, low-cost, broadband and tunable perfect optical absorber based on phase-change material

Nanoscale ◽

10.1039/c9nr07602f ◽

2020 ◽

Vol 12 (9) ◽

pp. 5374-5379 ◽

Cited By ~ 12

Author(s):

Nanli Mou ◽

Xiaolong Liu ◽

Tao Wei ◽

Hongxing Dong ◽

Qiong He ◽

...

Keyword(s):

Phase Change ◽

Phase Change Material ◽

Large Scale ◽

Low Cost ◽

Metamaterial Absorber ◽

Near Ir ◽

Tunable Metamaterial ◽

Change Material

We experimentally demonstrate a large-scale, low-cost, broadband, and tunable metamaterial absorber using phase change material. Based on two distinct resonance mechanisms, the device exhibits high absorptivity for both visible and near-IR lights.

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A large scale perfect absorber and optical switch based on phase change material (Ge2Sb2Te5) thin film

Science China Materials ◽

10.1007/s40843-016-0129-7 ◽

2016 ◽

Vol 59 (3) ◽

pp. 165-172 ◽

Cited By ~ 11

Author(s):

Xinglin Wen ◽

Qihua Xiong

Keyword(s):

Thin Film ◽

Phase Change ◽

Phase Change Material ◽

Large Scale ◽

Optical Switch ◽

Perfect Absorber ◽

Change Material

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Flexural behaviour of fibre-reinforced polymer–aluminium sandwich curtain walls

Journal of Sandwich Structures & Materials ◽

10.1177/1099636216681193 ◽

2017 ◽

Vol 20 (7) ◽

pp. 783-810

Author(s):

Yang Liu ◽

JS Kuang ◽

BYB Chan

Keyword(s):

Phase Change ◽

Phase Change Material ◽

Large Scale ◽

Foam Core ◽

Flexural Behaviour ◽

Curtain Wall ◽

Material Layer ◽

Reinforced Polymer ◽

Fibre Reinforced Polymer ◽

Change Material

A new type of fibre-reinforced polymer–aluminium sandwich curtain wall panel, which consists of layers of aluminium plate, fibre-reinforced polymer plate, foam core and gypsum board, was proposed to achieve high strength and stiffness, efficient energy saving and good fire resistance for the modern curtain wall systems in buildings. An experimental study was conducted to investigate the flexural behaviour of the fibre-reinforced polymer–aluminium composite curtain wall panels. Three groups of large-scale specimens with different thickness of foam core with and without a phase change material layer were tested under uniformly distributed loads. The test results showed that due to the asymmetric arrangement of sandwich layers, the loading directions had a significant effect on the flexural behaviour of the panels with and without a phase change material layer. It was also shown that with the increase of the foam core thickness, the flexural behaviour of panels was significantly improved. In addition, the phase change material layer had little effect on the flexural behaviour of the sandwich panels under and beyond the serviceability conditions, but significantly reduced the serviceability strength.

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