A wind turbine has a nacelle which houses operative components such as a transformer or converter which in use generate unwanted heat, the nacelle including an external nacelle cover (20) to form the outer nacelle enclosure, and provided with a panel (24) which overlies a bottom cover (22) region forming therewith a conduit for directing external air to one or more of the heat generating operative components for cooling purposes.

The disclosure relates to a mounting frame, an energy storage unit, a pitch system, a wind turbine and a method. The mounting frame for mounting accumulators in a hub includes: a base having a predetermined thickness, wherein the base includes a mounting surface in a thickness direction of the base; and two or more accumulator mounting elements disposed on the mounting surface at intervals, wherein each accumulator mounting element includes a supporting assembly and a holding assembly connected to the supporting assembly, the supporting assembly is connected to the mounting surface and extends in the thickness direction, and the holding assembly is adapted to clamp and fix the accumulator such that all the accumulators in the hub are mounted to the mounting frame.

An annular seal member comprising a seal body comprising a locating portion locatable against a wall element of an offshore structure, an inner surface, an outer surface and a lip portion that defines an open mouth of the seal member for receiving an elongate element therethrough; wherein the seal body is locatable against the wall element such that when a static pressure acting on the outer surface of the seal body exceeds a static pressure acting on the inner surface of the seal body a net positive pressure is exerted on the outer surface which at least partly deforms inwardly to provide a portion of the seal body for sealing against an outer surface of the elongate element. An offshore structure.

A wind energy generation system includes a tower, a nacelle provided in an upper portion of the tower to be rotatable around a central axis of the tower, a hub provided in front of the nacelle to be rotatable around an axis orthogonal to the central axis, and one or more blades provided on the hub. An oil receiving portion is provided on an outer wall of the tower to protrude outward from the outer wall and encircle the outer wall around the central axis. One or more opening portions that guide the oil received by the oil receiving portion into the tower are provided at a portion of the outer wall of the tower at which the oil receiving portion is provided. In the wind energy generation system, outflow of oil to the outside from the generation system can be inhibited.

A wind energy generation system includes a tower, a nacelle provided in an upper portion of the tower to be rotatable around a central axis of the tower, a hub provided in front of the nacelle to be rotatable around an axis orthogonal to the central axis, and one or more blades provided on the hub. An oil receiving portion is provided on an outer wall of the tower to protrude outward from the outer wall and encircle the outer wall around the central axis. One or more opening portions that guide the oil received by the oil receiving portion into the tower are provided at a portion of the outer wall of the tower at which the oil receiving portion is provided. In the wind energy generation system, outflow of oil to the outside from the generation system can be inhibited.

An electrical system for a wind turbine having a reduced uptower footprint and method for achieving the same are provided. Accordingly, the electrical system includes a plurality of electrical subsystems having a plurality of electrical subsystem assemblies. At least one electrical subsystem assembly is integrated with the generator housing. Additionally, the electrical subsystem assembly is coupled between the stator or the rotor of the generator and the generator output connection. The electrical system incorporating the electrical subsystem assembly with the generator housing has a reduced uptower footprint relative to a nominal design of an electrical system.

A monopile comprising a body (1) having a hollow interior, a toe (9) at a distal end for insertion into a soil (19) during monopile installation, and a proximal end region (2) for supporting a structure (7), such as a wind turbine tower, once the monopile has been installed. The body (1) further comprises a door aperture (12) provided in the body (1) for accessing the interior of the body (1). The door aperture (12) is configured to receive a door assembly (6,18) once the monopile (1) has been installed.

A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least one auxiliary unit. The auxiliary unit accommodates at least one operative component, e.g. a converter, a transformer, an electrolysis cell, or a battery. An operative component having a similar function is accommodated in another auxiliary unit which thereby facilitate shared operation, and easy and fast maintenance or replacement of the operative component.

A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least two auxiliary units. To increase flexibility and improve assembly and maintenance procedures of the wind turbine, the auxiliary unit comprises at least two auxiliary units each accommodating at least one wind turbine component, e.g. a converter or a transformer. The auxiliary units are attached individually to the same wall of the main unit, e.g. to a side wall or a rear wall.

A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least two auxiliary units. To increase flexibility and improve assembly and maintenance procedures of the wind turbine, the auxiliary unit comprises at least two auxiliary units each accommodating at least one wind turbine component, e.g. a converter or a transformer. The auxiliary units are attached individually to the same wall of the main unit, e.g. to a side wall or a rear wall.