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Experimental Investigation on Thermal Conductivity of Straw Boards Based on the Temperature Control Box—Heat Flux Meter Method

Author

Listed:
  • Kuo Sun

    (School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

  • Chaorong Zheng

    (School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
    Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China)

  • Yue Wu

    (School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
    Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China)

  • Wenyuan Zhang

    (School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
    Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China)

Abstract

Straw boards are the environmentally-friendly and sustainable materials used for building envelopes. To validate a novel alternative test method of thermal conductivity ( λ ), temperature control box–heat flux meter method (TCB-HFM), and better understand the thermal properties of straw boards, experimental investigation on two types of straw boards using such a method was carried out. Moreover, the control test via the conventional guarded hot plate method (GHP) was conducted to provide a benchmark. Results show that the fluctuation amplitudes of the temperature difference and heat flux density for the TCB-HFM during the steady state are much smaller than a generally acceptable limitation of 5%, and a 5.9% deviation of λ between the two test methods is in a reasonable range. It is indicated that the TCB-HFM can be regarded as an alternative test method to conduct investigations on the thermal properties of materials. Furthermore, the correlation between density and λ is explored and expressed by a linear fitting formula with the determination coefficient (R 2 ) of 0.9193, and the formula is verified to have the feasibility to predict the λ of different types of straw bio-based materials.

Suggested Citation

  • Kuo Sun & Chaorong Zheng & Yue Wu & Wenyuan Zhang, 2023. "Experimental Investigation on Thermal Conductivity of Straw Boards Based on the Temperature Control Box—Heat Flux Meter Method," Sustainability, MDPI, vol. 15(14), pages 1-15, July.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:14:p:10960-:d:1192875
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    References listed on IDEAS

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    1. Stefano Cascone & Gianpiero Evola & Antonio Gagliano & Gaetano Sciuto & Chiara Baroetto Parisi, 2019. "Laboratory and In-Situ Measurements for Thermal and Acoustic Performance of Straw Bales," Sustainability, MDPI, vol. 11(20), pages 1-19, October.
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