American Electric Power System Electric Thermal Storage Program: an Evaluation of the Impact on the Transmission and Distribution Systems

Based on the results of the performed experimental studies of thermal operation conditions and dynamic characteristics of electro-thermal storages (ETS), data on the behavior of the following thermal parameters of heat storage units made of magnesite and chamotte has been obtained: temperature change of heated air in channels of heat storage units and that in the outlet from ETS, temperature change in the bulk of thermal insulation and that on the surface of housing, for one cycle of heat charging and heat emission of ETS. Information obtained in the course of experiments has been analyzed. The suggestion has been made to compensate relatively low heating rate of chamotte storage units by application of metal plates installed between adjacent storage units which made it possible to improve the dynamics of ETS heat charging. Growth of wall temperature of air channels of chamotte heat storage units, in the end of ETS charging cycle, amounted to, approx. 10 % (50 °C) compared to the design option without metal plates. It has to be noted that, in the heat emission mode of ETS, cooling rate of chamotte heat storage units is substantially higher than that of magnesite units.

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American Electric Power System Electric Thermal Storage Program: an Evaluation of the Impact on the Transmission and Distribution Systems

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