CPC F01K 3/004 (2013.01) [F01D 15/10 (2013.01); F01K 3/186 (2013.01); F01K 13/02 (2013.01); F02C 6/14 (2013.01)] | 20 Claims |
1. A method comprising:
operating a pumped-heat energy storage (“PHES”) system in a charge mode to convert electricity into stored thermal energy in a hot thermal storage (“HTS”) medium by transferring heat from a working fluid to a warm HTS medium, resulting in the hot HTS medium, wherein the PHES system is further operable in a generation mode to convert at least a portion of the stored thermal energy into electricity; and
heating the hot HTS medium with an electric heater including, at least partially, during operation of the PHES system in the charge, idle, or generation mode.
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