Wind turbine tower for storing hydrogen and energy

A wind turbine tower system for storing hydrogen and energy, comprising:

• a wind turbine assembly comprising a rotor, a generator linked to the rotor, and a nacelle housing the generator;
• a tower connected at an upper end to the nacelle, the tower comprising a wall with a circular cross section;
• and
• an in-tower hydrogen storage comprising a top end cap within the tower sealably attached to the wall a first distance from the upper end of the tower and a bottom end cap within the tower sealably attached to the wall a second distance greater than the first distance from the upper end of the tower, the top end cap, the bottom end cap, and inner surfaces of the wall between the top and bottom end caps defining a gas storage volume for storing hydrogen.

A wind turbine tower assembly for storing compressed gas, comprising:

• a wind turbine assembly comprising a rotor, a generator linked to the rotor, and a nacelle housing the generator;
• a structural foundation;
• and
• a tubular tower having a first end mounted to the foundation and a second end supporting the nacelle;
• an in-tower storage provided within the tower configured for storing a pressurized gas and defined in part by inner surfaces of the tower, wherein the in-tower storage comprises an upper end cap proximal to the second end of the tower and sealed about its circumference to an inner surface of the tower wall and wherein the in-tower storage further comprises a lower end cap proximal to the first end of the tower and sealed about its circumference to an inner surface of the tower wall;
• and
• an electrical transmission line connected to the generator, and wherein the in-tower storage further comprises an elongate transmission line guide extending through and between the end caps, a gas tight seal provided between the guide and each of the caps.