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Wood Composite as an Energy Efficient Building Material: Guided Sunlight Transmittance and Effective Thermal Insulation

Advanced energy materials, 2016-11, Vol.6 (22), p.np-n/a [Peer Reviewed Journal]

2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim ;Copyright © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim ;ISSN: 1614-6832 ;EISSN: 1614-6840 ;DOI: 10.1002/aenm.201601122

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  • Title:
    Wood Composite as an Energy Efficient Building Material: Guided Sunlight Transmittance and Effective Thermal Insulation
  • Author: Li, Tian ; Zhu, Mingwei ; Yang, Zhi ; Song, Jianwei ; Dai, Jiaqi ; Yao, Yonggang ; Luo, Wei ; Pastel, Glenn ; Yang, Bao ; Hu, Liangbing
  • Subjects: Building materials ; Construction materials ; Daylight ; directional scattering ; energy efficient building ; Energy management ; Glass ; light management ; sunlight harvesting ; Thermal conductivity ; Thermal insulation ; Wood ; Wood composites
  • Is Part Of: Advanced energy materials, 2016-11, Vol.6 (22), p.np-n/a
  • Description: Among many other requirements, energy efficient building materials require effective daylight harvesting and thermal insulation to reduce electricity usage and weatherization cost. The most commonly used daylight harvesting material, glass, has limited light management capability and poor thermal insulation. For the first time, transparent wood is introduced as a building material with the following advantages compared with glass: (1) high optical transparency over the visible wavelength range (>85%); (2) broadband optical haze (>95%), which can create a uniform and consistent daylight distribution over the day without glare effect; (3) unique light guiding effect with a large forward to back scattering ratio of 9 for a 0.5 cm thick transparent wood; (4) excellent thermal insulation with a thermal conductivity around 0.32 W m−1 K−1 along the wood growth direction and 0.15 W m−1 K−1 in the cross plane, much lower than that of glass (≈1 W m−1 K−1); (5) high impact energy absorption that eliminates the safety issues often presented by glass; and (6) simple, scalable fabrication with reliable performance. The demonstrated transparent wood composite exhibits great promise as a future building material, especially as a replacement of glass toward energy efficient building with sustainable materials. As light/thermal management building material, transparent wood can provide uniform, consistent, and efficient indoor lighting with effective thermal insulation. Resulting from the wood's naturally gown microstructures, the transparent wood composite exhibits unique sunlight guiding effect, anisotropic thermal conductivity, and high impact energy absorption capability, exhibiting great promise toward sustainable energy efficient building materials.
  • Publisher: Weinheim: Blackwell Publishing Ltd
  • Language: English
  • Identifier: ISSN: 1614-6832
    EISSN: 1614-6840
    DOI: 10.1002/aenm.201601122
  • Source: Alma/SFX Local Collection
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