Thermal Conductivity Measurement of Bulk Solids

Abstract

The coefficient of thermal conductivity of particulates and powders is of great importance in process engineering. The prediction of thermal properties of powders using empirical equations is still difficult due to the wide range of specific attributes. This article describes a new measurement methodology for a laboratory device that can be used to determine the thermal conductivity of bulk solids. The presented results show that the created device is highly applicable in industrial practice. It is possible to examine the coefficient of thermal conductivity depending on the sample temperature, the granulometry results and the morphological composition, the moisture content, the degree of consolidation, and other variables that may enter into the entire process and affect it significantly.

Experimental Measurement of Bulk Thermal Conductivity of Activated Carbon with Adsorbed Natural Gas for ANG Energy Storage Tank Design Application

“…The correct measurement and characterization of the thermal conductivity of bulk materials such as activated carbon can pose a number of problems. For example, the loss of heat input power, resulting in the generation of heat for heating the activated carbon samples, can be very difficult to quantify [38]. The bulk thermal conductivity for the tests did not dramatically increase with increased power to the test section heater.…”

The effect of particle size, temperature and residence time on the yields and reactivity of olive stones from torrefaction

“…This shows that the torrefaction process at temperatures below 300 • C does not contain any risks related to material self-heating, thermal runaway and fire ignition at large-scale plant. In general, it is expected that the difference in thermal conductivity values of both torrefied biomass samples are small due to the similar cross-grain fiber orientation in non-treated olive residues and wood [109]. Thus, the first peak of torrefied biomass from treatment below 270 The residence time of torrefied olive stones had a negligible influence on the CO 2 reactivity leading to the peak temperature shift from 940 to 975 • C when the residence time was increased from 30 to 120 min.…”

Concept of Underground Gas Storage in the Limestone Rocks in Slovenia

“…Data obtained from geological mapping and the geological inventory of the core wells,confirming act and limestone dolomites, are presented in Table 1. After all needed geological data were obtained, rock mass parameters were determined on the basis of the generalized Hoek-Brown failure criterion [11,12]. The computer program RocLab was applied [13].…”