Abstract: Operation of an energy storage system comprising a thermodynamic cycle including first and second thermal reservoirs and a turbomachinery as energy converter for two-way conversion between electrical energy and thermal energy. For controlling the temperature in the system, the compression ratio of the turbomachinery is adjusted in real-time during charging on the basis of temperature measurements downstream of the compression and/or during discharging on the basis of temperature measurements downstream of the expansion.

Abstract: Two adjacent pipe flanges are secured by a plurality of clamp units, where each clamp unit, in order to receive the adjacent flanges in its receptacle, is thermally expanded.

Abstract: Thermal energy storage system with phase change material and method of its operation An energy storage system (100) comprises a hot thermal energy storage medium (5?) and a cold thermal energy storage medium (4?), which are interconnected in a thermo-dynamic gas flow circuit. An energy converter with a motor/generator system (1A, 1B) is functionally connected to a compressor/expander system (2) for converting between electrical energy and thermal energy of the gaseous working fluid in the thermodynamic fluid circuit. A latent thermal energy storage working fluid is thermally connected to the gas flow circuit through heat exchanger (8) for providing a limit for the temperature in the cold TES medium (4?).

Abstract: A method of operating an energy storage system (100), the system (100) comprising a thermodynamic cycle including a first thermal energy storage container (5) and an energy converter (1, 2, 3) for converting between electrical energy and thermal energy of the working fluid in the thermodynamic fluid cycle. For controlling the thermocline in the system without large thermal energy loss, it is pushed only partially out of the first thermal energy storage container (5).

Abstract: A method of operating an energy storage system (100), the system (100) comprising a thermodynamic cycle including a first thermal energy storage container (5) and an energy converter (1, 2, 3) for converting between electrical energy and thermal energy of the working fluid in the thermodynamic fluid cycle. For controlling the thermocline in the system without large thermal energy loss, it is pushed only partially out of the first thermal energy storage container (5).

Abstract: Thermal energy storage system with phase change material and method of its operation An energy storage system (100) comprises a hot thermal energy storage medium (5?) and a cold thermal energy storage medium (4?), which are interconnected in a thermo-dynamic gas flow circuit. An energy converter with a motor/generator system (1A, 1B) is functionally connected to a compressor/expander system (2) for converting between electrical energy and thermal energy of the gaseous working fluid in the thermodynamic fluid circuit. A latent thermal energy storage working fluid is thermally connected to the gas flow circuit through heat exchanger (8) for providing a limit for the temperature in the cold TES medium (4?).

Abstract: A hydrogen production plant is provided in which an electrolysis system splits water into hydrogen and oxygen gas. The hydrogen gas is accumulated under pressure in a buffer container that also contains the electrolysis system, which is operated under the same pressure. For controlling pressure between the oxygen and hydrogen gas, an expansion vessel is provided with a flexible part separating the hydrogen gas and the oxygen gas. The movement of the flexible part is recorded by a sensor system, for example a camera, the signals of which are used by an automated control system for regulating oxygen flow out of the electrolysis system.

Abstract: The application relates to a floatable foundation structure for an offshore structure including at least one floating body arrangement and at least one mass arrangement. The mass arrangement is connected to the floating body arrangement by at least one holding rope in a coupling state. Further, in the coupling state for coupling the floating body arrangement to the mass arrangement, a coupling section of the holding rope is arcuately guided around a contact section of the mass arrangement.

Abstract: An offshore structure (1) with tubular braces (110) that are joined by joints (125) at nodes (120). The tubular braces (110) may be made of steel. The joint (125) is formed by means of casted concrete or grout in a receiving joint volume (150) in one or both of the braces (110). Also disclosed is a a keel structure formed by braces (110) and joints (125) as outlined and a combination of a wind turbine and such offshore structure (1).

Abstract: An offshore floating structure is provided including a floater with positive buoyancy and a keel with negative buoyancy, as well as active and passive suspenders connecting nodes of the keel and the floater with each other. When the keel at the offshore site is lowered by making the active suspenders longer, the passive suspenders, which have a fixed length and are held taut, causes the keel to rotate about the vertical during lowering.

Abstract: Operation of an energy storage system comprising a thermodynamic cycle including first and second thermal reservoirs and a turbomachinery as energy converter for two-way conversion between electrical energy and thermal energy. For controlling the temperature in the system, the compression ratio of the turbomachinery is adjusted in real-time during charging on the basis of temperature measurements downstream of the compression and/or during discharging on the basis of temperature measurements downstream of the expansion.

Abstract: The application relates to a floatable foundation structure for an offshore structure including at least one floating body arrangement and at least one mass arrangement. The mass arrangement is connected to the floating body arrangement by at least one holding rope in a coupling state. Further, in the coupling state for coupling the floating body arrangement to the mass arrangement, a coupling section of the holding rope is arcuately guided around a contact section of the mass arrangement.

Abstract: A protection system for a threaded fastener is provided. The system includes a threaded fastener, a sleeve and either two end caps, or one end cap and one threaded hole in a component. To avoid exposure to severely corrosive environments the sleeve and either the two end caps, or the one end cap and the one threaded hole, together form an enclosure around the threaded fastener. The enclosure forms a cavity which is completely sealed from the environment. Furthermore, methods are described for mounting, inspection and maintenance of such protection system.

Abstract: Various embodiments of the present disclosure are directed to offshore frame construction. In one example embodiment, an offshore frame construction is disclosed including structural members and a structural joint connecting the structural members. The structural joint includes a fork part, an ear part, and a pin, where the fork part and the ear part includes a bore, and the pin is inserted into the bore. The pin has a non-corroding surface that is a cladding or bushing welded or shrunk or glued or otherwise affixed to the pin which consists of a different material, or the non-corroding surface is continuous with the pin and the pin consists of the non-corroding material. In some specific embodiments, the bore includes a sliding surface, which is fitted with a liner acting as a bearing, and the bearing is an elastomeric bearing.

Abstract: Provided is a floating wind turbine including a hull, a wind turbine mounted on top of the hull and a counterweight suspended below the hull by a counterweight suspension is described. Also, a method for the installation is described. The counterweight includes one or more counterweight buoyancy tanks. When the internal volume of the buoyancy tanks is filled with air, the total buoyancy of the counterweight is close to or greater than its weight. Hereby it is capable of floating in a towing/maintenance position with moderate or no support in the vertical direction from the hull or other vessels. During towing, the hull substantially has the character of a barge, substantially relying on a large waterplane area and shallow draft to maintain stability.

Abstract: A method for manufacturing a component for a wind turbine is provided. In a first step, a fiber material is laid onto a mold surface. In a further step, an uncured foam material is provided on top of the fiber material. Thereafter, the uncured foam material is cured to form a core member. Then, a resin impregnating the fiber material is cured to form the component. Thus, a core member for a component of a wind turbine can be provided easily.

Abstract: A charging system with a least one high temperature thermal energy exchange system is provided. The high temperature thermal energy exchange system includes at least one heat exchange chamber with chamber boundaries which surround at least one chamber interior of the heat exchange chamber, wherein the chamber boundaries include at least one inlet opening for guiding in an inflow of at least one heat transfer fluid into the chamber interior and at least one outlet opening for guiding out an outflow of the heat transfer fluid out of the chamber interior. At least one heat storage material is arranged in the heat exchange chamber interior such that a heat exchange flow of the heat transfer fluid through the heat exchange chamber interior causes a heat exchange between the heat storage material and the heat transfer fluid.

Abstract: In a method for exhaust gas aftertreatment, in which an exhaust gas to be aftertreated, which is produced during combustion of a fuel, is treated with a reducing agent. A constituent of the fuel is hereby also used as a constituent of the reducing agent, with the constituent of the fuel which is also used as a constituent of the reducing agent being hydrogen. The hydrogen is produced from water, and the reducing agent is a mixture of hydrogen and ammonia.

Abstract: A protection system for a threaded fastener is provided. The system includes a threaded fastener, a sleeve and either two end caps, or one end cap and one threaded hole in a component. To avoid exposure to severely corrosive environments the sleeve and either the two end caps, or the one end cap and the one threaded hole, together form an enclosure around the threaded fastener. The enclosure forms a cavity which is completely sealed from the environment. Furthermore, methods are described for mounting, inspection and maintenance of such protection system.

Abstract: A thermal energy storage is provided comprising a housing, a thermal energy storage structure arranged within the housing, the thermal energy storage structure comprising thermal energy storage elements and a plurality of dividing elements, the plurality of dividing elements being arranged such that the thermal energy storage elements are divided into a plurality of layers, a fluid inlet, the fluid inlet being in fluid communication with the housing and adapted to receive a working fluid and provide a flow of working fluid towards the housing, and a convection reducing structure arranged adjacent the thermal energy storage structure at a side of the thermal energy storage structure that faces the fluid inlet. Furthermore, a method of storing thermal energy and a steam power plant for producing electrical energy are described.