A wind turbine, with 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, wherein the generator generates electrical energy and a first heat loss, a second heat source in the form of at least one electrical device (400, 500) for converting the electrical energy generated by the generator in the nacelle interior, wherein the electrical devices (400, 500) 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 (400, 500), wherein an air treatment unit (600, 700) is provided in the nacelle interior, which has a droplet separator and a recirculating chiller, wherein the droplet separator is designed to free the air flowing in through the air inlet of liquid droplets, wherein the air cooling system has a fan or a fan set in the form of multiple fans in a single housing in the nacelle interior, wherein the fan or the fan set generates an air flow in the direction of air flow within the nacelle, which flows around the recirculating chiller, wherein the liquid cooling system has a coolant, and is coupled at least with the second heat source, and designed to cool the second heat source, wherein the liquid cooling system is coupled with the recirculating chiller, which serves as a heat exchanger, wherein the air flow cools the recirculating chiller in the direction of air flow, which in turn cools the coolant, wherein the air flow flows around the first and second heat source (300, 400, 500), and thus cools the first and second heat source (300, 400, 500). 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, wherein the generator generates electrical energy and a first heat loss, a second heat source in the form of at least one electrical device (400, 500) for converting the electrical energy generated by the generator in the nacelle interior, wherein the electrical devices (400, 500) 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 (400, 500), wherein an air treatment unit (600, 700) is provided in the nacelle interior, which has a droplet separator and a recirculating chiller, wherein the droplet separator is designed to free the air flowing in through the air inlet of liquid droplets, wherein the air cooling system has a fan or a fan set in the form of multiple fans in a single housing in the nacelle interior, wherein the fan or the fan set generates an air flow in the direction of air flow within the nacelle, which flows around the recirculating chiller, wherein the liquid cooling system has a coolant, and is coupled at least with the second heat source, and designed to cool the second heat source, wherein the liquid cooling system is coupled with the recirculating chiller, which serves as a heat exchanger, wherein the air flow cools the recirculating chiller in the direction of air flow, which in turn cools the coolant, wherein the air flow flows around the first and second heat source (300, 400, 500), and thus cools the first and second heat source (300, 400, 500).