Non-destructive infrared evaluation of thermo-physical parameters in bamboo specimens

Juan Felipe Florez-Ospina, Juan Esteban Ospina-Borras, Hernán Darío Benitez-Restrepo

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

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 ρcρ 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 ρcρ. 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.

Original languageEnglish
Article number1253
JournalApplied Sciences (Switzerland)
Volume7
Issue number12
DOIs
StatePublished - 02 Dec 2017

Keywords

  • Guadua a.k
  • Heat transfer coefficient
  • Infrared thermography
  • Inverse heat conduction problem
  • Thermo-physical properties

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