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Investigation of Thermal Conductivity Variation of Biomass Products with Moisture

The aim of this paper is to investigate the thermal conductivity of various biomass products and investigate the thermal conductivity when moisture is added. In this study, the biomass used was seeds from Bermuda grass and a mix of wildflowers (e.g. Lupine, flax, Coreopsis and Shasta daisy).

Thermal diffusivity is calculated with a transient, one-dimensional conduction experiment. The experiments on aluminum is performed to test the experimental test setup to ensure the accuracy of the technique. Before obtaining the biomass thermal conductivity tests, the actual thermal conductivity values are obtained with the C-Therm TCi Thermal Conductivity Analyzer and the tests are carried out and compared with these values. Next, moisture is infused into biomass samples by addition of water from 10% to 30% with increments of 5%. An increase in thermal conductivity with moisture is observed for both biomass samples and the results are presented. In our tests, the moisture increased the thermal conductivity about 78% for Bermuda grass seed and 122% for Wild Flower seed.\

This paper highlights application of the C-Therm TCi Thermal Conductivity Analyzer.

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