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 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 , wherein an air treatment unit 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 (1210-1240) or a fan set (910-940) in the form of multiple fans in a single housing in the nacelle interior , wherein the fan (1210-940) or the fan set (1210-940) generates an air flow in the direction of air flow (L) 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 (L) flows around the first and second heat source , and thus cools the first and second heat source . 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 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 , wherein an air treatment unit 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 (1210-1240) or a fan set (910-940) in the form of multiple fans in a single housing in the nacelle interior , wherein the fan (1210-940) or the fan set (1210-940) generates an air flow in the direction of air flow (L) 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 (L) flows around the first and second heat source , and thus cools the first and second heat source . <EOS>