Thermal energy torage cn be based on sensible heat storage,latent heat storage and thermochemicla heat storage.Although the latter tow have advantages in large volumetric energy density,their price and their handling,however,is a drawback which brings sensible heat storage,primarily n water,to an advantage,With small warm water stores new developments arose form application to solar energy.A great number of differently structured stores are in the mrket.New ways of testing these stores have bene developed in order to provide an objective comparison.
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