Abstract: An electric arrangement comprising a casing; a heat generating electric component arranged inside the casing; and a heat exchanger comprising a three dimensional lattice cell structure, the three dimensional lattice cell structure being arranged to conduct a dielectric cooling fluid from the casing at an exterior side of the casing for heat exchange with an ambient fluid, and back towards the casing for cooling of the electric component. A panel for a heat exchanger and a heat exchanger comprising a plurality of panels are also provided.

Abstract: A method for producing pressboard for electrical insulation, said method including, in any order: a) mechanically compressing at least one pressboard precursor suitable for electrical insulation, and b) emitting electromagnetic waves towards the pressboard precursor(s). The mechanical compression of the pressboard precursor includes sequentially passing the pressboard precursor through a plurality of compression stations, each compression station including at least one pair of rollers together compressing the pressboard precursor as it passes a gap between the respective pair or rollers, wherein the gap is smaller for each station in the sequence.

Abstract: An airflow generator including a ducted fan and a plurality of air multipliers for discharging air along a first axis, each air multiplier including an inlet and an outlet, said ducted fan being fluidly connected to the inlets (8) of the air multipliers, wherein the air multipliers are differently sized to provide airflows of different cross-sectional size, and are positioned such that smaller ones of the air multipliers provide airflows reinforcing a respective sub-portion of the airflows provided by larger air multipliers, and wherein the air multipliers are distributed along the first axis.

Abstract: The disclosure relates to a cooling arrangement for cooling a transformer in a transformer tank, the cooling arrangement includes a transformer tank, to be at least partially filled with an electrically insulating fluid when in use, a transformer having windings, at least one heat exchanger, and a fluid discharge device arranged in the transformer tank, fluidly connected to the at least one heat exchanger, and a pump in fluid communication with the at least one heat exchanger (18) and with the fluid discharge device. The fluid discharge device includes at least one Coand? effect fluid flow multiplier configured to discharge the cooled fluid along a discharge axis towards one or more of the windings of the at least one phase leg of the transformer.

Abstract: A transformer arrangement comprising an airflow generator and a transformer provided with an oil-to-air external heat exchanger, the airflow generator being configured to discharge air towards the oil-to-air heat exchanger. The airflow generator comprises an electrically powered ducted fan, a fluid conduit, an air multiplier for discharging air along a first axis, and an airflow redistribution device axially displaced from the air multiplier along a first axis, downstream of the air multiplier. The airflow redistribution device is configured to redirect airflow from regions of higher speed airflow discharged from the air multiplier to regions of lower speed airflow discharged from the air multiplier, thereby promoting a more even distribution of airflow speeds downstream of the airflow redistribution device.

Abstract: A cooling arrangement for cooling at least one OAEHE in a transformer. The cooling arrangement comprises at least one impeller-motor device, at least one fluid pipe and a first fluid discharge device. The first fluid discharge device comprises a fluid inlet arranged to receive a fluid from the at least one fluid pipe, and at least one fluid outlet arranged to direct the fluid towards the OAEHE, wherein the at least one impeller-motor device is adapted to supply the fluid to the inlet of the first fluid discharge device via the at least one fluid pipe and cause the fluid to flow through the at least one fluid outlet of the first fluid discharge device in a direction of the at least one OAEHE. The cooling arrangement further comprises a second fluid discharge device adapted to disturb the fluid that flows through the at least one fluid outlet of the first fluid discharge device.

Abstract: A cooling arrangement for cooling at least one OAEHE in a transformer. The cooling arrangement includes at least one impeller-motor device, at least one fluid pipe at least one fluid discharge device. The at least one impeller-motor device is adapted to supply a fluid to the inlet of the at least one fluid discharge device via the at least one fluid pipe and cause the fluid to flow through the at least one fluid discharge device and be discharged through the at least one fluid outlet of the at least one fluid discharge device. The cooling arrangement further comprises includes a funnel. The at least one impeller-motor device is located in a housing at a distance of at least 3 meters from the at least one fluid discharge device.

Abstract: A press plate for compressing at least one pressboard precursor, wherein the press plate includes, at least one fluid permeable barrier layer, wherein the at least one barrier layer prevents fibers to pass through the barrier layer, and wherein the at least one barrier layer has a first surface arranged to face a pressboard precursor to be compressed; a rigid press layer, the rigid press layer including passages for fluid transport; and heating means for heating the pressboard precursor(s), a system for compressing at least one pressboard precursor and a method for compressing at least one pressboard precursor.

Abstract: An electric arrangement comprising a casing; a heat generating electric component arranged inside the casing; and a heat exchanger comprising a three dimensional lattice cell structure, the three dimensional lattice cell structure being arranged to conduct a dielectric cooling fluid from the casing at an exterior side of the casing for heat exchange with an ambient fluid, and back towards the casing for cooling of the electric component. A panel for a heat exchanger and a heat exchanger comprising a plurality of panels are also provided.

Abstract: A heat exchanger comprising a primary side; a secondary side; at least one primary structure on the primary side defining at least one primary space on the primary side; and at least one secondary structure on the secondary side defining at least one secondary space on the secondary side; wherein one or more of the at least one primary structure and one or more of the at least one secondary structure delimit a coolant volume separated from the at least one primary space and separated from the at least one secondary space; wherein one or more of the at least one primary structure and/or one or more of the at least one secondary structure comprises a three dimensional lattice body.

Abstract: A heat exchanger comprising a primary side; a secondary side; at least one primary structure on the primary side defining at least one primary space on the primary side; and at least one secondary structure on the secondary side defining at least one secondary space on the secondary side; wherein one or more of the at least one primary structure and one or more of the at least one secondary structure delimit a coolant volume separated from the at least one primary space and separated from the at least one secondary space; wherein one or more of the at least one primary structure and/or one or more of the at least one secondary structure comprises a three dimensional lattice body.

Abstract: A glass furnace for continuous operation, including a melting tank for containing a glass melt, and at least one magnetic actuator configured to generate a time-varying magnetic field suitable for moving a stirring body immersed in the glass melt.

Abstract: A glass furnace for continuous operation, including a melting tank for containing a glass melt, and at least one magnetic actuator configured to generate a time-varying magnetic field suitable for moving a stirring body immersed in the glass melt.

Abstract: An apparatus for electromagnetic stirring of the steel melt in an electrical arc furnace includes two electromagnetic stirrer units, a current supply, and a control unit. The two stirrers are mounted on an outer bottom surface of the electrical arc furnace at opposites sides of a central position of the bottom surface, the current supply is operatively connected to the two electromagnetic stirrer units, and the control unit is operatively connected to the current supply to control the operation of the two electromagnetic stirrer units.

Abstract: An apparatus for crystallization of silicon includes a crucible for containing silicon, a heating and heat dissipating arrangement provided for melting the silicon contained in the crucible and for subsequently solidifying the molten silicon, and an electromagnetic stirring device provided for stirring the molten silicon in the crucible during the solidification of the molten silicon. A control arrangement is provided for controlling the heating and heat dissipating arrangement to solidify the molten silicon at a specified solidification rate and for controlling the electromagnetic stirring device to stir the molten silicon in response to the specified solidification rate of the molten silicon such that the ratio of a speed of the molten silicon and the specified solidification rate is above a first threshold value.

Abstract: An apparatus for crystallization of silicon includes a crucible for containing silicon, a heating and heat dissipating arrangement provided for melting the silicon contained in the crucible and for subsequently solidifying the molten silicon, and an electromagnetic stirring device provided for stirring the molten silicon in the crucible during the solidification of the molten silicon. A control arrangement is provided for controlling the heating and heat dissipating arrangement to solidify the molten silicon at a specified solidification rate and for controlling the electromagnetic stirring device to stir the molten silicon in response to the specified solidification rate of the molten silicon such that the ratio of a speed of the molten silicon and the specified solidification rate is above a first threshold value.

Abstract: An apparatus for electromagnetic stirring of the steel melt in an electrical arc furnace includes two electromagnetic stirrer units, a current supply, and a control unit. The two stirrers are mounted on an outer bottom surface of the electrical arc furnace at opposites sides of a central position of the bottom surface, the current supply is operatively connected to the two electromagnetic stirrer units, and the control unit is operatively connected to the current supply to control the operation of the two electromagnetic stirrer units.

Abstract: An apparatus for crystallization of silicon includes a crucible for containing silicon, a heating and heat dissipating arrangement provided for melting the silicon contained in the crucible and for subsequently solidifying the molten silicon, and an electromagnetic stirring device provided for stirring the molten silicon in the crucible during the solidification of the molten silicon. A control arrangement is provided for controlling the heating and heat dissipating arrangement to solidify the molten silicon at a specified solidification rate and for controlling the electromagnetic stirring device to stir the molten silicon in response to the specified solidification rate of the molten silicon such that the ratio of a speed of the molten silicon and the specified solidification rate is above a first threshold value.

Abstract: An apparatus for crystallization of silicon includes a crucible for containing silicon, a heating and heat dissipating arrangement provided for melting the silicon contained in the crucible and for subsequently solidifying the molten silicon, and an electromagnetic stirring device provided for stirring the molten silicon in the crucible during the solidification of the molten silicon. A control arrangement is provided for controlling the heating and heat dissipating arrangement to solidify the molten silicon at a specified solidification rate and for controlling the electromagnetic stirring device to stir the molten silicon in response to the specified solidification rate of the molten silicon such that the ratio of a speed of the molten silicon and the specified solidification rate is above a first threshold value.