Abstract: The invention relates to a method for determining the energy production to be expected for a wind power installation for a forecast time period, which may be an expected annual energy production. The installation has installation components. In the method, at least one of the installation components is selected as a thermally relevant component and chronologically distributed wind speed values are specified for the forecast time period. An expected power output level of the installation is determined for one of the wind speed values. In the power output level determining step, a component temperature which is assigned to this wind speed value is taken into account by the at least one thermally relevant component. The expected power output level of the installation, which is determined for the wind speed value, is used to determine the energy production of the installation which is to be expected for the forecast time period.

Abstract: A generator, in particular a generator for a wind power installation, the generator having: an air supply duct and a separate exhaust air chamber, in particular two or a plurality of exhaust air chambers, which are fluidically connected to the upstream air supply duct, a stator segment having a stator active unit and a rotor segment which is disposed so as to be rotatable relative to the stator segment about a rotation axis and has a rotor active unit, the rotor active unit and the stator active unit being disposed so as to be mutually spaced apart by an air gap by way of which the exhaust air chamber is fluidically connected to the upstream air supply duct, wherein an air-conveying device is disposed downstream of the exhaust air chamber that is configured for cooling the rotor active unit and the stator active unit, the air-conveying device for cooling the rotor active unit and the stator active unit supplying cooling air to the air gap by way of the air supply duct, and discharging from the air gap cooling

Abstract: The invention relates to a method for determining the energy production to be expected for a wind power installation for a forecast time period, which may be an expected annual energy production. The installation has installation components. In the method, at least one of the installation components is selected as a thermally relevant component and chronologically distributed wind speed values are specified for the forecast time period. An expected power output level of the installation is determined for one of the wind speed values. In the power output level determining step, a component temperature which is assigned to this wind speed value is taken into account by the at least one thermally relevant component. The expected power output level of the installation, which is determined for the wind speed value, is used to determine the energy production of the installation which is to be expected for the forecast time period.

Abstract: A method for controlling a gearless wind turbine, wherein the wind turbine comprises a generator having a stator and a rotor and an air gap therebetween which has an air gap thickness, wherein the generator is designed as an internal rotor, with the stator as an outer part and the rotor as an inner part, or the generator is designed as an external rotor, with the rotor as an outer part and the stator as an inner part, said method comprising the following steps: detecting a temperature of the outer part as an outer part temperature, detecting a temperature of the inner part as an inner part temperature, calculating a temperature difference as the difference between the outer part temperature and the inner part temperature, and controlling the generator according to the temperature difference such that a reduction in the air gap thickness by thermal expansion of the generator is counteracted.

Abstract: A method for controlling a gearless wind turbine, wherein the wind turbine comprises a generator having a stator and a rotor and an air gap therebetween which has an air gap thickness, wherein the generator is designed as an internal rotor, with the stator as an outer part and the rotor as an inner part, or the generator is designed as an external rotor, with the rotor as an outer part and the stator as an inner part, said method comprising the following steps: detecting a temperature of the outer part as an outer part temperature, detecting a temperature of the inner part as an inner part temperature, calculating a temperature difference as the difference between the outer part temperature and the inner part temperature, and controlling the generator according to the temperature difference such that a reduction in the air gap thickness by thermal expansion of the generator is counteracted.

Abstract: A wind turbine having a nacelle, with at least one liquid circuit with a coolant, a cooling section for cooling a component of the wind turbine using the coolant, a cooler for cooling the coolant, a piping system for conveying the coolant and an expansion tank for obtaining an operating pressure of the liquid circuit, wherein the expansion tank establishes a pressure in the liquid circuit using static pressure of a liquid column.

Abstract: A wind turbine having a nacelle, with at least one liquid circuit with a coolant, a cooling section for cooling a component of the wind turbine using the coolant, a cooler for cooling the coolant, a piping system for conveying the coolant and an expansion tank for obtaining an operating pressure of the liquid circuit, wherein the expansion tank establishes a pressure in the liquid circuit using static pressure of a liquid column.

Abstract: A wind power installation in which conduits through which a cooling medium flows are passed from the interior of the wind power installation through the tower wall or through the foundation outwardly, and the cooling conduits in the heat exchanger bear externally against the tower or are arranged there and are arranged between the tower wall and a cover of the wall of the cooling system.