Engineering, 01.04.2020 00:25, topgunholley

Thermal energy storage systems commonly involve a packed bed of solid spheres, through which a hot gas flows if the system is being charged, or a cold gas if it is being discharged. In a charging process, heat transfer from the hot gas increases thermal energy stored within the colder spheres; during discharge, the stored energy decreases as heat is transferred from the warmer spheres to the cooler gas.
Consider a packed bed of 75-mm-diameter aluminum spheres (? = 2700 kg/m3, and c = 950J/kg

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Thermal energy storage systems commonly involve a packed bed of solid spheres, through which a hot g...