Circular propulsion jet compressor-engine, through a circular combustion chambers propellants spheroidal geometry set, generates a tangential push the turning radius and therefore resulting angular momentum about the shaft of the circle in rotation. This impulse is the consequence of the principle of action-reaction, the violent expansion that occurs inside the combustion chamber, when burning mixtures of fuel and oxidizer at high pressure, or by merging a small mass of H.sub.2, encapsulated and simultaneously subjected to very high pressure, constant electromagnetic fields and high-frequency electric fields and high peak intensity. The high pressure on the oxidant or H.sub.2, is achieved using the force resulting from the centripetal acceleration shaft rotating about a significant mass of a piston, solid or liquid and alternatively or cyclically. The gases and vapors produced are cooled inside the engine. In the combustion reaction, water vapor is condensed and water obtained by, pollution is retained inside the engine.

A pitch bearing for coupling a rotor blade to a hub of a wind turbine includes an outer race configured to be coupled to the hub, an inner race rotatable relative to the outer race and configured to be coupled to the rotor blade, and a first plurality of line contact rolling elements. The outer race defines a first outer raceway wall and the inner race defines a first inner raceway wall. The first plurality of line contact rolling elements is disposed between the first inner and outer raceway walls. Each of the plurality of line contact rolling elements defines a predetermined contact angle. The predetermined contact angle is defined as an angle between a reference line extending perpendicular to a longitudinal axis of one of the plurality of line contact rolling elements and a reference line extending parallel to a horizontal plane of the pitch bearing. Further, the predetermined contact angle includes angles between 0 degrees () and 90.

Provided is a wind turbine, including a hub, a shaft which is connected to the hub, a bearing housing, in which the shaft is supported rotatable, a fluid bearing which supports the shaft in the bearing housing, wherein the fluid bearing is arranged at a proximal end of the shaft, wherein the proximal end of the shaft is positioned proximal to the hub, and a roller bearing which also supports the shaft in the bearing housing, wherein the roller bearing is arranged at a distal end of the shaft, and wherein the distal end of the shaft is positioned distal to the hub. One advantage of the wind turbine is that compared to roller bearings, the fluid bearing provides a bearing type with high load capacity and scalability to even large wind turbines.

Provided is a thrust bearing for a wind turbine including a thrust collar rotatable around a longitudinal axis of the thrust bearing and having a thrust surface transversally oriented with respect to longitudinal axis, a support structure fixed with respect to the longitudinal axis of the thrust bearing, a bearing pad contacting the thrust surface of the thrust collar and movable on a pad seat provided on the support structure, a spring element interposed between the bearing pad and the support structure.

A wind turbine, including a support structure and a thrust bearing having a bearing pad which includes a piston and which is movably connected to the support structure, a spring element which is configured to resiliently support the bearing pad relative to the support structure, wherein a pad portion of the bearing pad and/or the bearing pad itself is configured to tilt and to move translationally relative to the support structure, and wherein a gap is provided between the piston and the support structure. The piston limits the movement of the bearing pad. Thus, reliable and well defined movement limits are provided. Furthermore, a broad spectrum of spring parameters is available since the movement may be restricted by the piston and not necessarily be the spring element.

Methods are provided to prepare a low sulfur fuel from hydrocarbon sources, such as light tight oil and high sulfur fuel oil, often less desired by conventional refiners, who split crude into a wide range of differing products and may prefer presence of wide ranges (C3 or C5 to C20 or higher) of hydrocarbons. These fuels can be produced by separating feeds into untreated and treated streams, and then recombining them. Such fuels can also be formulated by combinations of light, middle and heavy range constituents in a selected manner as claimed. Not only low in sulfur, the fuels of this invention are also low in nitrogen and essentially metals free. Fuel use applications include on-board large marine transport vessels but also on-shore for large land based combustion gas turbines, boilers, fired heaters and transport vehicles and trains.

A drive train of a wind turbine is disclosed as having a rotatable hub, a gearbox, a rotatable rotor shaft extending between the rotatable hub and the gearbox, and a main bearing assembly supporting the rotatable rotor shaft, the main bearing assembly having a main bearing housing enclosing one or more compound bearings, each of the one or more compound bearings having at least two axial thrust bearings and a radial bearing.

Methods are provided to prepare a low sulfur fuel from hydrocarbon sources, such as light tight oil and high sulfur fuel oil, often less desired by conventional refiners, who split crude into a wide range of differing products and may prefer presence of wide ranges (C3 or C5 to C20 or higher) of hydrocarbons. These fuels can be produced by separating feeds into untreated and treated streams, and then recombining them. Such fuels can also be formulated by combinations of light, middle and heavy range constituents in a selected manner as claimed. Not only low in sulfur, the fuels of this invention are also low in nitrogen and essentially metals free. Fuel use applications include on-board large marine transport vessels but also on-shore for large land based combustion gas turbines, boilers, fired heaters and transport vehicles and trains.

A thrust bearing wear pad includes a rigid support plate adapted to be mounted on a collar and under a thrust flange in a hydro power turbine system. Multiple lignum vitae wood blocks are fixed to the top of the support plate and act as a wear surface on the wear pad.

A thrust bearing wear pad includes a rigid support plate adapted to be mounted on a collar and under a thrust flange in a hydro power turbine system. Multiple lignum vitae wood blocks are fixed to the top of the support plate and act as a wear surface on the wear pad.