Investigating on total emissivity of pistachio kernel using thermal imaging technique

Thermal imaging (TI) is an important technique to determine the temperature of agricultural materials and also to manage some of agricultural engineering operations. The goal of this research was determining the total emissivity of pistachio kernel, as a necessity for non-contact thermometry, and investigating the influence of surface temperature and moisture content of pistachio kernel on that. Thermal imaging camera and contact thermometer were used for these purposes. There was obtained 0.95 as the total emissivity of pistachio kernel in 4.5% moisture content. The results show that the total emissivity of pistachio kernel will be increased by increasing of temperature and decreasing of moisture content.

Non-contact thermometry; Emissivity; Thermal Imaging Technique; Pistachio; Temperature; Moisture Content.