Non-homogeneous Thermal Properties of Bamboo

Huang, Puxi; Chang, Wen‐Shao; Shea, Andrew; Ansell, Martin P.; Lawrence, Michael B.

doi:10.1007/978-94-007-7811-5_59

Cited by 14 publications

(12 citation statements)

References 3 publications

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“…Numeric approximations were made using the estimated thermal conductivity value and diffusivity value given by the Hot Disk analyser software and the measured density of the sample. The specific heat capacity for Moso bamboo composites was estimated at 1.80 ± 0.38 J/kg K which is in agreement with the specific heat capacity of Moso bamboo [8], and with 1.75 ± 0.38 J/kg K for Guadua bamboo composites (for which no value is available in literature).…”

Section: Density and Volumetric Compositionsupporting

confidence: 81%

“…Huang et al [8] have examined the thermal properties of bamboo culm, and ascribe fluctuations in conductivity as a function of radial location to changes in the culm microstructure (viz. spatial variation in the morphology of vascular bundles and proportion of parenchyma).…”

Section: Characteristics Of Bamboo: Thermal Propertiesmentioning

confidence: 99%

“…relative insulator); the consequent increase in thermal conductivity is expected. While the strong positive correlation between thermal conductivity and density for wood and engineered wood products is well known [11][12][13][14]20], recent studies on bamboo and engineered bamboo products have also shown similar trends [8][9][10].…”

Section: Thermal Conductivity Of Different Engineered Bamboo Compositesmentioning

confidence: 99%

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Thermal conductivity of engineered bamboo composites

Shah

Bock

Mulligan³

et al. 2015

J Mater Sci

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Here we characterise the thermal properties of engineered bamboo panels produced in Canada, China, and Colombia. Specimens are processed from either Moso or Guadua bamboo into multi-layered panels for use as cladding, flooring or walling. We utilise the transient plane source method to measure their thermal properties and confirm a linear relationship between density and thermal conductivity. Furthermore, we predict the thermal conductivity of a three-phase composite material, as these engineered bamboo products can be described, using micromechanical analysis. This provides important insights on density-thermal conductivity relations in bamboo, and for the first time, enables us to determine the fundamental thermal properties of the bamboo cell wall. Moreover, the density-conductivity relations in bamboo and engineered bamboo products are compared to wood and other engineered wood products. We find that bamboo composites present specific characteristics, for example lower conductivities-particularly at high density-than equivalent timber products. These characteristics are potentially of great interest for low-energy building design. This manuscript fills a gap in existing knowledge on the thermal transport properties of engineered bamboo products, which is critical for both material development and building design.

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Section: Density and Volumetric Compositionsupporting

confidence: 81%

Section: Characteristics Of Bamboo: Thermal Propertiesmentioning

confidence: 99%

Section: Thermal Conductivity Of Different Engineered Bamboo Compositesmentioning

confidence: 99%

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Thermal conductivity of engineered bamboo composites

Shah

Bock

Mulligan³

et al. 2015

J Mater Sci

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“…Bamboo's tissue is inhomogeneous; it varies along and across the culm. Most of the studies [10,28,29] that estimate thermal properties of bamboo both along and across the culm take small pieces of bamboo culms since the analysis equipment imposes such specific geometries on the specimens to be analyzed. Even though these works provide insight into the thermal properties of bamboo, they lack practical use when inspecting numerous samples whose geometries are mostly cylindrical.…”

Section: Estimation Of Thermo-physical Properties Of Bamboo Using Expmentioning

confidence: 99%

Non-Destructive Infrared Evaluation of Thermo-Physical Parameters in Bamboo Specimens

Ospina-Borras¹,

Benítez-Restrepo²,

Florez-Ospina³

2017

Applied Sciences

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Abstract:The estimation of heat conduction properties has considerable importance in the characterization of bamboo with respect to its potential use as an alternative construction material. Even though traditional methods such as hot plates have successfully measured thermal parameters, like thermal diffusivity and conductivity in bamboo samples, it is still necessary to transform the cylindrical bamboo specimen into a piece with special geometry and size. This requirement makes this method impractical in applications where several bamboo specimens need to be measured in their original cylindrical shape. This paper presents the estimation of thermo-physical parameters k and ρc p in Guadua angustifolia kunth (Guadua a.k.) bamboo through nonlinear least square optimization and infrared thermography. A sensitivity analysis was carried out to determine how the temperature on the bamboo surface is affected by changes in the convection coefficient h, thermal conductivity k, and volumetric heat capacity ρc p . In spite of the nonlinearity and high correlation in the parameters of the inverse heat conduction problem (IHCP), the estimation of such parameters is robust and consistent with those reported in the literature.

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“…However, the corresponding data in the radial (R) and tangential (T) directions of the Moso bamboo culm are not yet known. ThD measurements in the case of bamboo are challenging because of the heterogenous character of this material both from the anatomical and thermal properties point of view (Huang et al 2014;Huang et al 2015).…”

Section: Eq 1;mentioning

confidence: 99%

Thermal diffusivity measurement of Phyllostachys edulis (Moso bamboo) by the flash method

et al. 2017

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Thermal diffusivity (ThD) of Phyllostachys edulis (Moso bamboo) has been determined in three directions of the cylindrical coordinate system of the culm. A flash tube and an infrared camera system was utilised for this purpose. The results, calculated by the MATLAB programme, serve as a database for numerical simulation studies concerning the heat and moisture transfer behaviour of Moso bamboo. The porosity and complexity of cellular structure and interconnectivity are the essential parametres influencing the ThD of Moso bamboo.

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Non-homogeneous Thermal Properties of Bamboo

Cited by 14 publications

References 3 publications

Thermal conductivity of engineered bamboo composites

Thermal conductivity of engineered bamboo composites

Non-Destructive Infrared Evaluation of Thermo-Physical Parameters in Bamboo Specimens

Thermal diffusivity measurement of Phyllostachys edulis (Moso bamboo) by the flash method

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