Abstract: A processing arrangement for the fault situation of a local electric power transmission grid comprises a generator-specific element arranged to monitor the fault situation of a data communication bus and the statuses of the switches of the electric power transmission network and to compare the status data concerning the same switch. In case of a fault situation the generators change into droop control only if there are no other possibilities to continue with the normal adjustment of the generator.

Abstract: A hydraulic actuator (1) comprising a body (2), in which a control arm (5) and a lift means (6) provided with a piston surface (22) are arranged, which lift means is arranged to follow the reference movement of the control arm (5), and an inlet port (3) and an outlet port (4) for hydraulic medium. The body (2) encloses a pressure chamber (10) delimited by the piston surface (22) of the lift means (6), and the movement of the control arm (5) provides a flow connection between the inlet port (3) and the pressure chamber (10) in order to move the lift means (6), and the movement of the control arm (5) in the opposite direction provides a flow connection between the pressure chamber (10) and the outlet port (4) in order to move the lift means (6) in the opposite direction.

Abstract: The invention relates to a scrubber unit arrangement for cleaning exhaust gas. The arrangement comprises a scrubber unit for receiving a flow of exhaust gas, a pump means for supplying a scrubbing medium to the scrubber unit from a source of scrubbing medium, and means for discharging scrubbing medium from the scrubber unit. In order to provide an energy efficient scrubbing process, the scrubber unit arrangement further comprises a turbine unit, which is arranged to receive discharged scrubbing medium from the scrubber unit. Scrubbed exhaust gas is separately discharged from the scrubber unit.

Abstract: A turbine unit of a turbocompressor comprises a turbine wheel having blades and a flow channel for directing exhaust gas onto the turbine wheel. The turbine unit additionally comprises injection means for injecting carbon build-up preventing substance into the flow channel.

Abstract: A fuel cell system arrangement is disclosed for controlling an Oxygen-to-Carbon (O/C) relationship by providing water to an anode side fuel recirculation, pumping the provided water to facilitate a water flow, and evaporating water from the facilitated water flow for generating pressurized steam having at least the motive pressure for a steam jet-ejector. The at least one steam jet-ejector can inject at least part of the steam to the fuel cell system, and entrain part of an essentially low pressure anode exhaust gas stream in the anode side gas recirculation and compress the gas mixture to an intermediate pressure of the fuel feed-in stream for controlling the Oxygen-to-Carbon (O/C) relationship in the fuel side of the fuel cell system.

Abstract: A control arrangement for a gas exchange valve in a piston engine adapted between the camshaft of the engine and the valve mechanism, which control arrangement comprises a body part and a chamber arranged therein, into which chamber a connection for hydraulic medium opens and in which a piston device is arranged in force transmission connection with the camshaft and the valve mechanism. The connection for hydraulic medium opens to a space in the chamber, which space increases as the piston device moves in the opening direction of the valve, whereby hydraulic medium is arranged to flow into the space, when the valve is being opened, and out of the space, when the valve is being closed.

Abstract: The present invention relates to a preheating arrangement in a fuel cell apparatus, the fuel cell apparatus comprising at least a fuel cell unit having an anode side and a cathode side with an electrolyte therebetween, the fuel cell apparatus having at least a fuel inlet to the anode side and an oxygen-containing air inlet to the cathode side as well as a sulphur removal unit and a fuel modifying unit and an afterburner for combustion the exhaust gases from the anode and/or cathode side. According to the invention, the afterburner is provided with a separate fuel inlet channel for introducing fuel to the afterburner during the start-up phase of the fuel cell apparatus and that at least a part of the exhaust gases formed in the combustion of the separately fed fuel is arranged to be directed from the afterburner for heating at least the sulphur removal unit and/or the fuel modifying unit during the start-up phase.

Abstract: A method and an apparatus for testing the piston (2) of an injection pump of a pressure medium, the piston comprising a longitudinal groove (2b) that begins from its frontal face (2a) and extends on its side, and a screw-shaped guide edge (2c) that abuts on the envelope surface of the piston. According to the invention, the piston (2) is inserted, with its frontal face (2a) first, into a testing cylinder (1), wherein the clearance between the piston (2) and the testing cylinder (2) is tight and wherein a specific testing pressure is exerted on the envelope surface of the piston, in a limited area, from the vicinity of the said guide edge (2c) to a selected measurement point. The piston (2) is moved in the testing cylinder (1), so that the said measurement point moves, following the guide edge (2c). Changes in the testing pressure are monitored to observe any failures in the piston (2) and the said guide edge (2c).

Abstract: Method for treating a crank pin of a crank shaft. In the method hardness of the crank pin surface is measured and when the hardness is over a predetermined limit value, depth of the hard spot is measured. Heat treatment parameters are determined at least on the basis of the depth measurement and the hard spot is heat treated. During the heat treatment the hard spot is heated by an induction heating device.

Abstract: Exemplary systems and methods for adjusting current values in a fuel cell system for producing electricity with fuel cells, include drawing major part of the current from at least one serial connection. An adjusting circuit adjusts current values by drawing or supplying current of at least one stack of individual fuel cell stacks or current of at least one group of the groups of stacks within the serial connection. The adjusting circuit is integrated with the at least one stack of individual fuel cell stacks or with the at least one group of the groups of stacks. Compensation current of the at least one stack or group is a small percentage of a major part of the current in the serial connection of stacks.

Abstract: A turbocharging arrangement for an internal combustion engine, the arrangement having a turbocharger with a turbine and a compressor connected to a common shaft in a rotationally fixed manner, an electric motor, and coupling means for coupling the electric motor to the shaft of the turbocharger. The coupling means is arranged to steplessly adjust the torque transmitted between the electric motor and the turbocharger. A method for operating a turbocharged internal combustion engine is also provided.

Abstract: A method of operating a fuel cell apparatus that comprises at least first and second groups of fuel cell stacks includes heating cathode gas supplied from a cathode gas inlet to cathode parts of the first group of fuel cell stacks by passing the cathode gas in heat exchange relationship with cathode exhaust gas being removed from at least one group of fuel cell stacks, and supplying cathode gas to the cathode parts of the second group of fuel cell stacks from a location upstream of a location at which the cathode gas being supplied to the cathode parts of the first group of fuel cell stacks is heated.

Abstract: A method for operating an LNG fuelled marine vessel having a propulsion system, a power plant and an LNG storage tank, whereby LNG is supplied as a gas fuel from the LNG storage tank to the power plant. The marine vessel deploys a fixed LNG storage tank and a removable LNG storage tank on board the marine vessel. In order to facilitate bunkering, the removable LNG storage tank is removed and replaced by another removable LNG storage tank at a bunkering facility.

Abstract: The invention relates to a barge arrangement comprising a barge unit with a first end (11) and a second end (12) and a tug unit provided with a propulsion unit, which barge unit is adapted to receive the tug unit at one end. In order to achieve an efficient vessel combination for loading, transport and unloading of cargo the barge unit (102) is adapted to receive a first tug unit (2) at its second end (12) in order to be pushed by the first tug unit (2) with the first end (11) of the barge unit (1) in a forward direction (F) of motion. Further, the barge unit (101) is adapted to receive a second tug unit (3) at its second end (12) in order to be pulled by the second tug unit (3) with the second end (12) of the barge unit (1) in the forward direction (F) of motion.

Abstract: The invention relates to a fuel injection arrangement for piston engine comprising at least one fuel injector by means of which fuel may be injected into a combustion chamber of the engine, the fuel injector comprising at least one fuel injection valve arranged to meter the fuel into the combustion chamber, the fuel injection arrangement further comprising an intensifier piston arrangement comprising a piston space and a piston member therein having a first area which is arranged to be effected by a work fluid and which first area at least partially borders a first work space of the intensifier piston arrangement; and the piston member having a second area which at least partially borders a second work space of the intensifier piston arrangement, the second work space being arranged in flow connection with the at least one injection valve of the injector.

Abstract: The invention relates to a method and an arrangement in connection with a piston engine provided with a turbocompressor. In the method, combustion air from the engine is pressurized by the compressor of the turbocompressor, pressurized combustion air is humidified, fuel is combusted in the cylinder of the engine by means of combustion air and the exhaust gases generated during the combustion are conveyed by means of combustion air to the turbine of the turbocompressor. A partial flow is separated from the pressurized combustion air flow, conveyed past the engine and combined with the exhaust gas flow going to the turbine.

Abstract: A dampening element for a vibration damper and a vibration damper. The dampening element comprises a body part having flow openings, a dampening part arranged to abut against the body part, the dampening part having openings aligning with the flow openings of the body part. In addition, a cover part is arranged against the dampening part, the cover part being movable in relation to the dampening part for changing the cross-sectional flow area of the openings of the dampening part.

Abstract: A fuel injector valve (1) of a piston engine, which comprises a fuel chamber (3) for the fuel to be injected, a valve needle (9) for guiding the fuel injection from the fuel chamber (3) into the cylinder (4) of the engine, a spring (10) for pressing the valve needle (9) towards the closed position, and a piezoelectric actuator (11) for guiding the valve needle (9). Additionally, the injector valve (1) comprises a drawbar (22), which is loosely coupled to the valve needle (9), a second drawbar (23), which is attached to the piezoelectric actuator (11) and loosely coupled to the drawbar (22), and that the injector valve (1) comprises a second spring (24) fitted in connection with the drawbar (22) for pressing the valve needle (9) towards the closed position and a third spring (25) fitted in connection with the second drawbar (23) for pressing the valve needle (9) towards the closed position.

Abstract: (Means) A seal ring in which an apex part of the key part is formed so that the cross-section profile regarding the apex part forms a reversed V-shape toward the outside in the radial direction; the summit T of the reversed V-shape is formed as the middle center T of the apex part; a step part on the front surface side of the key part and a step part on the back surface side of the key part are formed so that the width of the seal ring in the axis direction of the ship propulsion shaft becomes thinner in the transition area from the key part toward the heel part; the inner diameter of the key part at the step part on the back surface side of the key part is greater than the inner diameter of the key part at the step part on the front surface side of the key part; a lip tip of the lip part forms a V-shape protruding inward in the radial direction and a spring groove having a semicircular cross-section in which a ringed spring is formed in the lip part; the center regarding the spring groove is arranged so as t

Abstract: A method is disclosed for producing electricity in high temperature fuel cell systems. Gas is circulated at anode sides of the fuel cells. A gas composition at anode sides is determined for providing composition information, and desired temperature conditions are arranged for producing electricity with fuel cells. Rated power of the fuel cell system is controlled by an auxiliary water feed to the fuel cell system by utilizing the composition information, by performing controlled gas recirculation at anode sides by utilizing the composition information by changing the gas recirculation, when a desire arises, and by performing controlled gas feed in to the fuel cell system by utilizing the composition information by changing the gas feed, when a need arises, to change the rated power of the fuel cell system to keep electricity production conditions substantially optimal for the gas used as fuel in the high temperature fuel cell system.