Determination of thermal conductivity of baled agricultural biomass

Written by esba

Modeling of transport phenomena in materials with porous bed features requires thermophysical properties, such as porosity, permeability and thermal conductivity be known.

The paper presents experimental data obtained in the course of the investigation focused on the analysis of the stagnant thermal conductivity of biomass. Experiments were conducted using a custom-designed and constructed experimental setup and implementing the original experimental procedure. Results obtained enabled stagnant thermal conductivity of biomass to be determined for different biomass porosity values.

Analysis of the experimental data enabled functional dependence of stagnant thermal conductivity on porosity to be determined, with porosity varied in a range 0.50–0.85. Results obtained indicate that reduced bed porosity, down to the value of 0.65, causes stagnant thermal conductivity of the bed to be reduced. Further porosity reduction, below the value of 0.65, results in increased stagnant thermal conductivity of the bed.

The experimental procedure developed shall be useful for gathering experimental data on different materials planned to be analyzed when examining transport phenomena occurring during the combustion of biomass bales. In addition, data to be acquired shall be helpful in modeling the transport phenomena associated with combustion in porous beds.


  1. Erić, A.
  2. Komatina, M.
  3. Nemoda, S.
  4. Dakić, D.
  5. Repić, B.


About the author


The European Straw Building Association is an independent European association, devoid of any profit making motive. The object of the Association is to promote and develop the use of straw, as a sustainable way of building in all the senses of the term “sustainable”: renewable, ecological, healthy, energy and climate efficient, social and economic.
The Association is a federation composed of organisations and people particularly concerned with the use of straw in buildings.