Heat flux is a measure of the rate at which heat energy is transferred through a surface. It is a critical parameter in designing and optimizing various industrial systems, including heat exchangers, thermal energy storage systems, and building insulation. Heat transfer rates in PCMs are usually limiting, different improvement methods were used previously, such as fins or improved thermal conductivities. Here, the influence of fin geometries, PCM thermal. . The present disclosure relates to an energy storage device according to the preamble of claim 1 and to a method for reducing temperature variability in an energy storage device.
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