รจเรข ลำยอง. Physical Characteristics and Thermal Properties of Straw Mushroom. Master's Degree(Food Engineering). King Mongkut's University of Technology Thonburi. : King Mongkut's University of Technology Thonburi, 2005.
Physical Characteristics and Thermal Properties of Straw Mushroom
Abstract:
Physical characteristics of straw mushroom (Volvariella Volvacea) with an initial moisture content of 90.19 percent wet basis were investigated
in this study. The average length, width, thickness and sphericity of whole straw mushroom were 31.40 mm, 29.59 mm, 28.21 mm and 94.65
percent, respectively. Mean values for solid and bulk density were 696.51 and 339.82 kg/m3, respectively. In addition, the effects of moisture
content (30-90 percent wet basis) and temperature (50-90 ํC) on the specific heat, thermal conductivity and thermal diffusivity of straw mushroom
were studied. Specific heat was measured by a differential scanning calorimeter (DSC) while the bulk thermal conductivity was measured by a line
heat source probe apparatus. Bulk thermal diffusivity was then calculated from the experimental results of the specific heat, bulk thermal conductivity
and bulk density. It was found that specific heat, bulk thermal conductivity and bulk thermal diffusivity increased with an increase in both the moisture
content and temperature with the range of interest. The average values of specific heat, bulk thermal conductivity and bulk thermal diffusivity varied
in the ranges of 2.2835 - 4.0591 kJ/kg ํC, 0.2116 - 0.6682 W/m ํC and 1.0642 10-7 - 1.9620 10-7 m2/s, respectively. Finally, the empirical equations
of those thermal properties were expressed as a function of moisture content and temperature.