Method for operating a heat exchanger, arrangement with a heat exchanger, and system with a corresponding arrangement

An arrangement having a heat exchanger, wherein the arrangement has means configured

• to carry out a first operating mode in first time periods and to carry out a second operating mode in second time periods that alternate with the first time periods,
• in the first operating mode, to form a first fluid flow at a first temperature level, to feed it into the heat exchanger in a first region at the first temperature level, and to cool it partially or completely in the heat exchanger,
• in the first operating mode, to form a second fluid flow at a second temperature level, to feed it into the heat exchanger in a second region at the second temperature level, and to heat it partially or completely in the heat exchanger,
• in the second operating mode, to halt the feeding of the first fluid flow and of the second fluid flow into the heat exchanger partially or completely, and
• the arrangement comprises a heating device which is arranged outside the heat exchanger and is configured to supply heat, which is provided by means of the heating device, to the first region either in the second time period or in a third time period which lies between at least one of the second time periods and the subsequent first time period,
• wherein
• the arrangement comprises a gas chamber which is arranged outside the heat exchanger and in which the first region is arranged, and the arrangement is configured to transfer the heat provided by means of the heating device to the second region via the gas chamber.