Abstract: A heat exchanger including a first module and a second module for heat exchange between a first fluid medium and a second fluid medium. The first fluid medium is conducted through a closed channel system separate from the second fluid medium, with the closed channel system flowed around by the gaseous second fluid medium. The first module and the second module are wetted by a third fluid medium, with a first wetting apparatus wetting the first module being actuatable independently of a second wetting apparatus wetting the second module. A first blocking element is provided for the first wetting apparatus. A second blocking element is provided for the second wetting apparatus. A monitoring system is provided by means of which the period of use of each blocking element can be detected so that the blocking elements can be switched in based on the data on the period of use.

Abstract: A heat exchanger including at least one first module and one second module for the heat exchange between a first fluid medium and a second fluid medium, wherein the first fluid medium can be conducted through a closed channel system separate from the second fluid medium, with the closed channel system being able to be flowed around by the second fluid medium and with the second fluid medium being gaseous. A first wetting apparatus is provided for the first module and a second wetting apparatus is provided for the second module by means of which the first module and the second module can be wetted by a third fluid medium, with the first wetting apparatus for the first module being able to be actuated independently of the wetting apparatus for the second module.

Abstract: A heat exchanger including at least one first module and one second module for the heat exchange between a first fluid medium and a second fluid medium, wherein the first fluid medium can be conducted through a closed channel system separate from the second fluid medium, with the closed channel system being able to be flowed around by the second fluid medium and with the second fluid medium being gaseous. A first wetting apparatus is provided for the first module and a second wetting apparatus is provided for the second module by means of which the first module and the second module can be wetted by a third fluid medium, with the first wetting apparatus for the first module being able to be actuated independently of the wetting apparatus for the second module.