US 12,066,008 B2
Device for controlling humidity in wind turbines
Mikkel Aggersbjerg Kristensen, Herning (DK)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Appl. No. 17/299,967
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Oct. 31, 2019, PCT No. PCT/EP2019/079817
§ 371(c)(1), (2) Date Jun. 4, 2021,
PCT Pub. No. WO2020/120011, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 18212368 (EP), filed on Dec. 13, 2018.
Prior Publication US 2022/0018332 A1, Jan. 20, 2022
Int. Cl. F03D 7/02 (2006.01)
CPC F03D 7/0232 (2013.01) [F05B 2240/3052 (2020.08); F05B 2240/3062 (2020.08); F05B 2260/64 (2013.01); F05B 2270/605 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A wind turbine comprising:
at least one rotor blade;
at least one aerodynamic device for influencing an airflow flowing from a leading edge section of the at least one rotor blade to a trailing edge section of the at least one rotor blade, wherein the at least one aerodynamic device is mounted at a surface of the at least one rotor blade;
a pneumatic actuator of the at least one aerodynamic device for actuating the at least one aerodynamic device at least between a first protruded configuration and a second retracted configuration;
a pressure supply system for operating the pneumatic actuator by means of a pressurized gas;
wherein the pressure supply system comprises:
a pressure generator for pressurizing the pressurized gas;
a pressure supply line connecting the pressure generator and the pneumatic actuator for providing the pressurized gas to the pneumatic actuator, the pressure supply line comprising a pressure reservoir;
a return line connecting the pressure generator and the pneumatic actuator for returning the pressurized gas to the pressure generator, the return line comprising a return reservoir having a negative relative pressure; and
a regeneration line directly connected to the return line for connecting a source of gas to the return line;
wherein the regeneration line includes a check valve configured for opening and putting in communication the source of gas to the return line whenever the negative relative pressure in the return reservoir decreases up to a predefined threshold value.