4800

"Most of these materials are available commercially as refractory tile, brick, and mortar. Properties will depend on form, purity, and mixture. Temperatures given should be considered as high limits.

^For density in kg/m3, multiply value in lb/ft3 by 16.02. For specific heat in J/kg K, multiply value in Btu/lbm °F by 4184. For thermal conductivity in W/m K, multiply value in Btu/ft hr °F by 1.73.

cSublimes.

^Dissociates.

"Most of these materials are available commercially as refractory tile, brick, and mortar. Properties will depend on form, purity, and mixture. Temperatures given should be considered as high limits.

^For density in kg/m3, multiply value in lb/ft3 by 16.02. For specific heat in J/kg K, multiply value in Btu/lbm °F by 4184. For thermal conductivity in W/m K, multiply value in Btu/ft hr °F by 1.73.

cSublimes.

^Dissociates.

used. This will occur when the cycle times are short and the thermal resistance to heat transfer is large. In those cases there exists insufficient time for the particles to get heated and cooled. Additional equations for determining the rise and fall in temperatures, and graphs giving temperature histories for the flow streams and the storage material, may be found in Rohsenow and Hartnett.5

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