Abstract: A power plant includes a structure and a vehicle having at least one wing including a first wing part and a second wing part. The vehicle is arranged to be secured to the structure by at least one tether. The vehicle is arranged to move in a predetermined trajectory by a fluid stream passing the wing. The vehicle includes at least one turbine connected to a nacelle having a generator. At least the first wing part is arranged at a first angle relative to a horizontal center line of the wing. The nacelle is arranged to be attached to a surface of the wing facing the direction in which the first wing part is angled.

Abstract: The invention relates to a submersible power plan. The submersible power plant is submerged in a fluid. The power plant includes a structure and a vehicle where the vehicle has at least one wing. The vehicle is arranged to be secured to the structure by at least one tether. The vehicle is arranged to move in a predetermined trajectory by a fluid stream passing the vehicle. The tether includes an upper tether part and a lower tether part. The upper tether part has an average density higher than the fluid, has a hydrodynamic cross section and is arranged to be connected to the vehicle. The lower tether part has an average density lower than the fluid, has a non-hydrodynamic cross section and is arranged to be connected to the structure.

Abstract: The invention relates to a method for controlling the operation of a submersible power plant (1) and a submersible power plant (1). The submersible power plant (1) comprises a structure (2) and a vehicle (3). The vehicle (3) comprises at least one wing (4). The vehicle (3) is arranged to be secured to the structure (2) by means of at least one tether (5). The vehicle (3) is arranged to move in a predetermined trajectory by means of a fluid stream passing the vehicle (3). The vehicle (3) is arranged to change the angle of attack of the at least one wing (4). The method comprises: I: determining if the speed of the fluid passing the vehicle (3) is higher than a predetermined value; or II: determining if the speed of the fluid passing the vehicle (3) is lower than the predetermined value. The vehicle (3) changes the angle of attack for different situations depending on if the speed is higher or lower than the predetermined trajectory.

Abstract: The present invention relates to a tether for connecting a moving device submerged in liquid to a support structure, e.g. a submersible power plant comprising a stream-driven vehicle provided with at least one turbine for generation of electrical energy. The tether extends in a main direction, and at least a tether portion of the tether comprises a tensile force bearing portion extending in the main direction of the tether, wherein the tether portion is arranged to strive to self-align in relation to a relative flow direction of the liquid during use.

Abstract: The invention relates to a method for controlling the operation of a submersible power plant (1) and a submersible power plant (1). The submersible power plant (1) comprises a structure (2) and a vehicle (3). The vehicle (3) comprises at least one wing (4). The vehicle (3) is arranged to be secured to the structure (2) by means of at least one tether (5). The vehicle (3) is arranged to move in a predetermined trajectory by means of a fluid stream passing the vehicle (3). The vehicle (3) is arranged to change the angle of attack of the at least one wing (4). The method comprises: I: determining if the speed of the fluid passing the vehicle (3) is higher than a predetermined value; or II: determining if the speed of the fluid passing the vehicle (3) is lower than the predetermined value. The vehicle (3) changes the angle of attack for different situations depending on if the speed is higher or lower than the predetermined trajectory.

Abstract: The arrangement comprises a fluid bearing comprising a first fluid bearing element located in a bearing housing and a piston located in a pump housing. The bearing housing comprises a bearing housing opening. The pump housing comprises a pump housing opening. The first fluid bearing element is connected to the piston by means of a connection means extending from the first fluid bearing element through the bearing housing opening to the piston through the pump housing opening. The piston is arranged to reciprocate in the pump housing. The pump housing is connected to a fluid reservoir by means of a first inlet. The bearing housing comprises a first outlet for allowing fluid to exit the bearing housing. The arrangement further comprises a fluid transport means fluidly connecting the pump housing and the bearing housing.

Abstract: A power plant includes a structure and a vehicle having at least one wing including a first wing part and a second wing part. The vehicle is arranged to be secured to the structure by at least one tether. The vehicle is arranged to move in a predetermined trajectory by a fluid stream passing the wing. The vehicle includes at least one turbine connected to a nacelle having a generator. At least the first wing part is arranged at a first angle relative to a horizontal centre line of the wing. The nacelle is arranged to be attached to a surface of the wing facing the direction in which the first wing part is angled.

Abstract: The invention relates to a power plant for producing electrical power. The power plant comprises a vehicle comprising at least one wing arranged to be secured to a structure by means of at least one tether. The vehicle is arranged to move with a varying speed over a predetermined trajectory by means of a fluid stream passing the wing. The power plant comprises an element arranged to change or allow change of the distance between the vehicle and the structure continuously over or during parts of the predetermined trajectory, thereby reducing the variation in speed of the vehicle over the predetermined trajectory and/or allowing electrical power to be generated from the variation in distance by means of a transducer arranged to be attached to the power plant. The advantage of the invention is that an increased efficiency is obtainable for the power plant.

Abstract: The arrangement comprises a fluid bearing comprising a first fluid bearing element located in a bearing housing and a piston located in a pump housing. The bearing housing comprises a bearing housing opening. The pump housing comprises a pump housing opening. The first fluid bearing element is connected to the piston by means of a connection means extending from the first fluid bearing element through the bearing housing opening to the piston through the pump housing opening. The piston is arranged to reciprocate in the pump housing. The pump housing is connected to a fluid reservoir by means of a first inlet. The bearing housing comprises a first outlet for allowing fluid to exit the bearing housing. The arrangement further comprises a fluid transport means fluidly connecting the pump housing and the bearing housing.

Abstract: The present invention relates to a tether for connecting a moving device submerged in liquid to a support structure, e.g. a submersible power plant comprising a stream-driven vehicle provided with at least one turbine for generation of electrical energy. The tether extends in a main direction, and at least a tether portion of the tether comprises a tensile force bearing portion extending in the main direction of the tether, wherein the tether portion is arranged to strive to self-align in relation to a relative flow direction of the liquid during use.