Thermal properties of selected bee products

Božiková, Monika and Hlaváč, Peter and Vozárová, Vlasta and Hlaváčová, Zuzana and Kubík, Ľubomír and Kotoulek, Peter and Brindza, Ján (2018) Thermal properties of selected bee products. Progress in Agricultural Engineering Sciences, 14 (s1). pp. 37-44. ISSN 1786-335X

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Abstract

Knowledge of bee products’ physical properties has a decisive importance for the monitoring of their quality. Thermophysical parameters are very important properties. Thermal conductivity and thermal diffusivity of selected bee products (honey, bee pollen and perga) were measured by two different methods. For identification of thermal conductivity and thermal diffusivity transient methods were used: Hot Wire (HW) and Dynamic Plane Source (DPS) method with an instrument Isomet 2104. The principle of measuring process is based on the analysis of timetemperature relation. In the first series of measurements thermal conductivity and diffusivity at constant laboratory temperature of 20 °C were measured. The second series was focused on identification of the changes in the thermophysical parameters during temperature stabilisation in the temperature range of 5–25 °C. For samples with constant temperature standard deviations and probable errors in % were calculated. For relations of thermal parameters to temperature graphical dependencies were obtained. Two different thermophysical methods were used for improvement of data reliability and data statistics.

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