Comparison of different materials and types of packing for use in heat accumulators

Abstract

Comparisons are made between different materials (basalt, quartzite, quartz, dolomite, gravel, pebbles, carborundum, heat-resistant glass, high-temperature ceramics, steel, and aluminum) and different types of packings (granulated materials, spherical particles, Raschig rings, and twisted rings) for their possible use as packings in heat accumulators. It is found that within the chosen temperature range nearly all of the above materials have roughly the same average volumetric heat capacity as the granulated basalt currently used in heat accumulators and, based on existing specifications, can also be recommended for use as such packings.