Abstract: A wind turbine with a tower and a nacelle with a nacelle housing is provided. The nacelle is placed on the tower. Further provided is a cooling flap, which is configured to close an opening in or on the area of the wind turbine to be cooled. At least one temperature-dependent passive actuator is configured to activate and open the cooling flap as a function of temperature, so as to enable a heat compensation in the area to be cooled by means of the opening. The temperature-dependent passive actuator can change its shape and/or its length without any external electrical energy as a function of temperature.

Abstract: A labyrinth seal device for an air passage, wherein the air passage is preferably an air outlet or an air inlet, for cooling air of a cooling system of a generator of a wind power installation the labyrinth seal device having a first labyrinth seal wall and a second labyrinth seal wall arranged spaced apart from the first labyrinth seal wall, wherein the first and second labyrinth seal walls form a labyrinthine sealing section which is configured to seal the generator with respect to dirt and/or water from a surrounding area and to guide cooling air from the generator into the surrounding area, wherein there is arranged within the sealing section an air directing device which is configured to direct the cooling air in flow-optimized manner out of the generator into the surrounding area.

Abstract: Thus provided is a wind turbine. The wind turbine has a nacelle with a first end and a second end, at least one air inlet and one nacelle housing with a nacelle interior. A first heat source in the form of an electric generator is provided, wherein the generator generates electrical energy and a first heat loss. A second heat source in the form of at least one electrical device is provided for converting the electrical energy generated by the generator in the nacelle interior, wherein the electrical devices generate a second heat loss, and are arranged in the nacelle housing. A cooling system with a liquid cooling system and an air cooling system for the first and second heat source is provided. An air treatment unit is provided in the nacelle interior, which has a droplet separator and a recirculating chiller. The droplet separator is designed to free the air flowing in through the air inlet of liquid droplets.