Abstract: The present disclosure relates to a vent fuel handling assembly and method of operation for a gas engine power plant, which can include a vent fuel recovery piping provided with at least one recovery piping for recovering vent fuel source, a vessel connected to the vent fuel recovery piping for storing the fuel recovered via the at least one inlet opening, and a compressor connected to the vessel at the inlet side of the compressor via a discharge piping so as to subject underpressure to the vessel and discharge gas from the vessel. The compressor is connected to the gas engine at the outlet side of the compressor via the discharge piping so as to feed the recovered gas to the engine for combustion therein.

Abstract: When an internal combustion engine is driven at a low rate below a certain threshold value, exemplary embodiments as disclosed herein allow and restrict a reductant flow to an injector in repeating allowing cycles and restricting cycles. During the allowing cycles the controller is set to keep the reductant flow as close as possible a determined low point setpoint value. During the restricted cycles the reductant flow is prevented.

Abstract: A method and apparatus for determining crush height of a plain bearing shell, including a light source for forming illuminating light to the plain bearing shell; a sensor device configured to capture an image; at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to: capture a first image of the plain bearing shell in a first mode, wherein no external compression stress in a circumference direction of the plain bearing shell is formed; generate plain bearing data based on the first captured image; maintain housing reference data including at least diameter information of a bore for receiving the plain bearing shell; and determine crush height of the plain bearing shell based on the plain bearing data and the housing reference data.

Abstract: An exemplary bilobe or multilobe tank for storing liquefied natural gas includes at least two tank sections, each tank section having a curved upper surface and curved bottom surface, the tank sections being joined to each other so that the tank has an undulating upper surface and an undulating lower surface. Each tank section is connected to an adjacent tank section with at least one connecting duct so that a horizontal flow path is formed between the lowermost points of the adjacent tank sections or between the uppermost points of the adjacent tank sections.

Abstract: The present invention relates to a fuel tank arrangement of a marine vessel including a fuel tank for Liquefied Natural Gas, the fuel tank having a shell, a heat insulation in connection therewith, connections for a pipeline for bunkering LNG to the fuel tank, a pipeline for taking boil-off gas from the fuel tank and a pipeline for taking LNG from the fuel tank, and a deep well pump for pumping LNG from the tank to the pipeline, wherein at least one recess is extending inwardly from the shell and being arranged on top of the fuel tank, the deep well pump being installed in the at least one recess.

Abstract: A water lead-through module is disclosed for discharging water into the sea through a hull of a marine vessel provided with a flow tube having a first end and a second end. The flow tube is of first grade steel, having an attachment flange part at the first end of the flow tube, and an outlet flange part at the second end of the flow tube extending radially outwards. A planar transition plate of a second grade steel has an outer periphery and includes an opening defining an inner periphery which conforms with an outer periphery of the outlet flange part, and wherein the transition plate is arranged axially flush with, rigidly connected to, by welding, the outlet flange part of the flow tube.

Abstract: A computer implemented method for providing marine vessel data of a marine vessel with a plurality of sensor devices includes receiving a first sensor data item with first sensor data of a first sensor device of the plurality of sensor devices, associated with a first local timestamp generated based on a local clock; receiving a second sensor data item including second sensor data of a second sensor device of the plurality of sensor devices, associated with a second local timestamp generated based on the local clock and a first universal timestamp generated based on a universal clock; determining time correction value based on the second sensor data item's second local timestamp and the universal timestamp; and generating time information for the first sensor data of the first sensor device using the first local timestamp and the time correction value.

Abstract: An acoustic attenuator for damping pressure vibrations in an exhaust system of an engine, the acoustic attenuator having a body which is provided with a gas inlet and a gas outlet at opposite ends thereof, and a gas passage duct arranged between the inlet and the outlet inside the body, where in the body encloses a first resonator chamber and a second resonator chamber. The body is provided with a common inlet communicating with the first and the second resonator chambers, and the resonator chambers are arranged to extend from the common inlet towards the opposite ends of the body.

Abstract: A liquefied gas fuel feeding system can include a liquefied gas container configured to store liquefied gas and gaseous gas in cryogenic circumstances, a first fuel passage opening into an ullage space of the gas, a second fuel passage opening into a bottom section of the gas and provided with a controllable pump, at least two fuel delivery passages each configured to convey gas to a single gas consumer of at least two gas consumers, and a valve assembly configured to connect alternatively the first fuel passage or the second fuel passage to each one of the at least two fuel delivery passages.

Abstract: An exemplary tank arrangement for storing liquefied natural gas includes a multilobe tank having at least three tank sections arranged in a row in a lateral direction, wherein each tank section is supported against a support surface with a first support allowing movement of the tank relative to the support surface in the longitudinal direction and with a second support, at least one of the second supports preventing movement of the tank relative to the support surface in the longitudinal direction. One tank section has a third support, which allows movement of the tank relative to the support surface in the longitudinal direction and prevents movement in the lateral direction. The first and second supports allow shrinkage and expansion of the tank in the lateral direction.

Abstract: An electric power plant includes at least one electric machine operable as a generator when rotated by a piston engine. The electric power plant includes a control system for interrupting the fuel supply of the piston engine in response to a need to interrupt power supply from the electric machine, and for reactivating the fuel supply in response to a need to reactivate the power supply. The control system is configured to keep the electric machine connected to voltage when the fuel supply of the piston engine is interrupted so as to operate the electric machine as an electric motor for rotating the piston engine. As the electric machine and the piston engine are rotating when the power supply from the electric machine is interrupted, the reactivation of the power supply can be fast.

Abstract: A fuel tank arrangement in a marine vessel has a tank container, a first fuel line having a first fuel line port opening into the tank container so as to provide a flow path exclusively for a first fuel, a second fuel line having a second fuel line port opening into the tank container so as to provide a flow path exclusively for a second fuel. The first fuel line port and/or the second fuel line port is provided with a plug or alike to close the flow path from the tank container into the fuel line.

Abstract: A gaseous fuel feeding system having a fuel supply line enclosed by a barrier wall system such that the fuel supply line includes a primary flow channel for the fuel and a secondary flow channel around the primary flow channel inside the barrier wall system, and a valve having a first fluid passage and a second fluid passage arranged to extend through the valve. The valve is coupled between the first and the second fuel supply line sections, such that the primary flow channel in the first fuel supply line section is in controllable flow connection with the primary flow channel in the second fuel supply line section via the first fluid passage of the valve. The secondary flow channel is in continuous flow connection with the secondary flow channel in the second fuel supply line section via the second fluid passage of the valve.

Abstract: A marine vessel includes at least one gas fuel consumer is arranged at a first horizontal level in the vessel, and at least one gas tank for the gas fuel consumer is arranged at a second horizontal level in the vessel, which second horizontal level is different from the first horizontal level. The vessel is provided with a fluid passing shaft for providing a confined vertically extending shaft between a gas consumer at a first horizontal level in the vessel and at least one gas fuel tank arranged at a second horizontal level in the vessel.

Abstract: A method of operating a marine vessel hybrid propulsion system having a propulsion shaft and a propeller, an internal combustion piston engine in force transmission connection with the propulsion shaft, and an electric motor-generator in force transmission connection with the propulsion shaft and/or with the piston engine. The internal combustion piston engine can be started by applying electric power from an on-board power source to the electric motor-generator and rotating the internal combustion piston engine by the electric motor-generator and rotational speed of the internal combustion piston engine is accelerated to a predetermined limit rotational speed without attempting to start the internal combustion piston engine, and only after the rotational speed of the internal combustion piston engine reaches the predetermined limit rotational speed, the internal combustion piston engine is started.

Abstract: An LNG tank is a single-shell LNG tank having one shell and at least one pipe extending from the LNG tank to a tank connection space of the LNG tank. The shell of the LNG tank is substantially surrounded by insulation. The LNG tank has at least one bellow connection surrounding at least part of the length of the at least one pipe for connecting the at least one pipe extending from the LNG tank to the tank connection space. A system for connecting at least one pipe between an LNG tank and a tank connection space thereof is also provided. At least one pipe extends from the LNG tank to the tank connection space and which LNG tank is a single-shell tank having one shell. The at least one pipe is connected between the LNG tank and the tank connection space by at least one bellow connection.

Abstract: A fuel tank arrangement of a marine vessel is disclosed, having an LNG-fuel tank formed of an inner shell, an outer shell, an insulation therebetween and a tank connection space provided at an end of the LNG-fuel tank, the inner shell having an end part at an end of the inner shell facing the tank connection space. A collar is fastened to the end part of the inner shell and extends conically outwardly from the inner shell. The collar has an outer rim to which an additional shell extending in an axial direction away from the inner shell is fastened, and the additional shell has an end rim opposite the collar to which an end cover of the tank connection space is fastened.

Abstract: An exemplary method for a marine vessel having a propeller mounted to a rotatable shaft for converting rotative shaft power transferred from the shaft to the propeller into thrust to propel the marine vessel across water, includes obtaining measurement values that are descriptive of the shaft power, the thrust and speed through water of the marine vessel; separately estimating at least one of first excess shaft power caused by fouling of the propeller and second excess shaft power caused by fouling of the hull of the marine vessel; and issuing an indication of propeller cleaning in dependence of the first excess shaft power and hull cleaning in dependence of the second excess shaft power.

Abstract: An exemplary method is disclosed for estimating operational efficiency of a marine vessel with a propeller mounted to a rotatable shaft for converting rotative shaft power transferred from the shaft to the propeller into thrust to propel the marine vessel across water, the method including obtaining a respective time series of values for operating parameters of the marine vessel; constructing a multi-dimensional power matrix for a first time period based on operating parameter values within a respective sub-series thereof that represents a first time period; computing, for one or more propulsion parameters, fouling values based on information stored in the power matrix and information stored in a base matrix, of a reference fouling level; and creating indications concerning operating status of the marine vessel in dependence of the fouling values.

Abstract: The heat insulation structure for a component of an exhaust system of a piston engine is arrangeable around the component such that an air space is formed between the component and the heat insulation structure, and includes an outer shell layer a middle shell layer that is arranged inside the outer shell layer, and a first inner shell layer that is arranged inside the middle shell layer. A first air gap is arranged between the outer shell layer and the middle shell layer, a first insulation layer is arranged between the middle shell layer and the first inner shell layer, and the outer shell layer is provided with venting apertures for natural ventilation of the first air gap.