Heat exchanger arrangement and method for the operation of same

A heat exchanger arrangement is presented having at least one heat exchanger module (2), which includes a plurality of microchannel heat transfer elements (6.1, 6.2) and a plurality of heat exchange ribs (7.1, 7.2) which are connected to the microchannel heat transfer elements in a thermally conductive manner and which form air channels, and having a ventilation apparatus to generate an airflow (12′) in the air channels. The heat exchanger arrangement additionally includes a wetting apparatus to wet the microchannel transfer elements and/or the heat exchange ribs with liquid (10′). The heat exchanger arrangement is furthermore characterized in that the heat exchanger module or modules is/are arranged at an angle (α) with respect to the vertical.