Heat exchange system with a joint active fluid motion device for the charging mode and for the discharging mode and method for exchanging heat by using the heat exchange system

A heat exchange system, comprising:

• at least one heat exchange chamber with heat exchange chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber,
• a charging unit for charging a heat transfer fluid, and
• a discharging unit for discharging the heat transfer fluid,
• wherein the heat exchange chamber, charging unit, and discharging unit form a closed loop system for the heat transfer fluid,
• wherein the heat exchange chamber boundaries comprise at least one first opening for guiding in an inflow of the heat transfer fluid into the heat exchange chamber interior during a charging mode, at least one second opening for guiding out an outflow of the heat transfer fluid out of the heat exchange chamber interior during the charging mode and guiding in an inflow of the heat transfer fluid into the heat exchange chamber interior during a discharging mode, and a third opening for guiding out an outflow of the heat transfer fluid during the discharging mode;
• wherein at least one heat storage material is arranged in the heat exchange chamber interior such that a heat exchange flow of the heat transfer fluid through the heat exchange chamber interior causes a heat exchange between the heat storage material and the heat transfer fluid;
• wherein the heat exchange system can be operated in the charging mode with a heat transfer from the heat transfer fluid to the heat storage material and the discharging mode with a heat transfer from the heat storage material to the heat transfer fluid;
• wherein the heat exchange system is equipped with at least one joint active fluid motion device with which the heat exchange flow of the heat transfer fluid through the heat exchange chamber interior during the charging mode and during the discharging mode is caused,
• wherein the heat exchange system is configured such that the at least one joint active fluid motion device receives the heat transfer fluid from the at least one second opening and provides the heat transfer fluid to the at least one first opening during the charging mode,
• wherein the at least one joint active fluid motion device receives the heat transfer fluid from the third opening and provides the heat transfer fluid to the at least one second opening during the discharging mode,
• wherein the charging unit comprises at least one electrical heating device which is selected from the group consisting of resistance heater, inductive heater, emitter of electromagnetic radiation and heat pump,
• wherein the discharging unit discharges the heat transfer fluid of the outflow from heat for production of electricity, and
• wherein the discharging unit comprises at least one water/steam cycle for driving a turbine of a steam power plant.