Method for loading and discharging a thermal chemical heat storage medium, wherein, during the loading of the heat storage medium , a heat flow (Q1) is transmitted to the heat storage medium and at the same time a reaction medium is released from the heat storage medium , and wherein during the discharging of the heat storage medium the reaction medium released during loading is supplied to the heat storage medium and a heat flow (Q2) released in this process is discharged from the heat storage medium , wherein for loading and discharging the heat storage medium is conveyed back and forth between two reservoir vessels , characterized by the method steps of: - providing the unladen heat storage medium in a first reservoir vessel ; - conveying the unladen heat storage medium along a first conveying section , in the form of a mechanical screw conveyor, from the first reservoir vessel to a second reservoir vessel , and - loading the unladen heat storage medium along the first conveying section , in the form of a mechanical screw conveyor, by supplying the heat flow (Q1) by means of an electrical heating device , with simultaneous complete removal of the reaction medium from the now laden heat storage medium ; - filling the second reservoir vessel with the heat storage medium laden along the first conveying section , in the form of a mechanical screw conveyor; - conveying the laden heat storage medium along a second conveying section , in the form of a mechanical screw conveyor, from the second reservoir vessel back to the first reservoir vessel , and - discharging the laden heat storage medium along the second conveying section , in the form of a mechanical screw conveyor, by supplying the reaction medium removed during loading, with simultaneous release and discharge of the heat flow (Q2) by means of a heat transfer medium; - filling the first reservoir vessel with the heat storage medium unladen along the second conveying section , in the form of a mechanical screw conveyor. - providing the unladen heat storage medium in a first reservoir vessel ; - conveying the unladen heat storage medium along a first conveying section , in the form of a mechanical screw conveyor, from the first reservoir vessel to a second reservoir vessel , and - loading the unladen heat storage medium along the first conveying section , in the form of a mechanical screw conveyor, by supplying the heat flow (Q1) by means of an electrical heating device , with simultaneous complete removal of the reaction medium from the now laden heat storage medium ; - filling the second reservoir vessel with the heat storage medium laden along the first conveying section , in the form of a mechanical screw conveyor; - conveying the laden heat storage medium along a second conveying section , in the form of a mechanical screw conveyor, from the second reservoir vessel back to the first reservoir vessel , and - discharging the laden heat storage medium along the second conveying section , in the form of a mechanical screw conveyor, by supplying the reaction medium removed during loading, with simultaneous release and discharge of the heat flow (Q2) by means of a heat transfer medium; - filling the first reservoir vessel with the heat storage medium unladen along the second conveying section , in the form of a mechanical screw conveyor. <EOS>