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: A fuel injection unit for assembly to a cylinder head and for injecting first and second fuel to a cylinder of an internal combustion piston engine includes a first fuel feeding section, a second fuel feeding section, a pressure accumulator in the first fuel feeding section, and a flow fuse arranged in the first fuel feeding section between the pressure accumulator and a fuel injection valve of the first fuel feeding section. The fuel injection valve includes a fuel handling section and control section, and the control section is a hydraulic control section fluidly separated from the fuel handling section.

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.

Abstract: The charge air cooler arrangement for a piston engine includes an air cooler housing, a charge air cooler, which is arranged inside the air cooler housing, and an air duct that is connected to the air cooler housing for introducing charge air into the charge air cooler. The air duct is configured to protrude into the air cooler housing and to be attached to the charge air cooler.

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: 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 method of controlling an operation of an inlet valve system arranged in connection with each cylinder of an internal combustion piston engine, includes monitoring at least one parameter relating to engine load conditions, controlling using a primary control procedure an opening and closing timing of an inlet valve in response to the at least one parameter, and feeding charge air into the cylinder when the inlet valve is open. In a secondary control procedure a parameter relating to engine load conditions is measured and the closing timing of the inlet valve of the inlet valve system is controlled in response to the at least parameter independently from and with higher priority than the primary control procedure.

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 ultrasonic quality control as disclosed can inspect a quality of a piece and classify the piece automatically. The piece can be scanned, and an image formed from the scanning. A reference piece is also scanned, and a reference image is formed. A negative image of the reference image is formed, and an indication image is created by utilizing the image and the negative image. The indication image is filtered by utilizing several image filters, each image filter filtering all data of the indication image except an image filter specific indication level data. Further several indication levels data are provided from the image filter specific indication level data, and the piece can be classified utilizing the several indication levels data.

Abstract: The disclosure relates to a gas valve unit having an enclosure provided with an inlet and an outlet, with an inner pipe arranged to extend from the inlet to the outlet via the enclosure forming a gas tight piping inside the enclosure, and an outer pipe arranged to open into the enclosure via an at least one opening. Walls of the inner pipe and the outer pipe form a space there between as a first volume, and the enclosure forms a space inside as a second volume, the first and second volumes being arrangeable in flow communication with each other via an opening in connection with the outer pipe. At least one blocking unit selectively blocks the at least one opening in connection with the outer pipe and the flow communication between the first volume and the second volume.

Abstract: The disclosure relates to a gas valve unit having an enclosure provided with an inlet and an outlet, with an inner pipe arranged to extend from the inlet to the outlet via the enclosure forming a gas tight piping inside the enclosure, and an outer pipe arranged to open into the enclosure via an at least one opening. Walls of the inner pipe and the outer pipe form a space there between as a first volume, and the enclosure forms a space inside as a second volume, the first and second volumes being arrangeable in flow communication with each other via an opening in connection with the outer pipe. At least one blocking unit selectively blocks the at least one opening in connection with the outer pipe and the flow communication between the first volume and the second volume.

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: An exemplary tank arrangement for storing liquefied natural gas includes a multilobe tank having a gas-tight shell, wherein the arrangement includes a gas-tight and heat-insulated partition wall arranged within the shell for dividing the tank into a gas storage space, which is configured to hold liquefied natural gas, and a tank connection space, which is configured to enclose tank connections and valves associated with them.

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: 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: The method controls timing of a discharge event of a centrifugal separator, during which discharge event at least part of a heavier liquid and/or sludge or solids separated from a lighter liquid is discharged from the separator through at least one discharge opening. The discharge opening is opened and/or closed hydraulically. The method comprises the steps of waiting for a scheduled discharge time, measuring the pressure of the liquid used for opening and/or closing the discharge opening, comparing the measured pressure to a predetermined limit value, and, in the case the pressure is below the limit value, delaying the discharge event.

Abstract: The present disclosure relates to a turbocharged internal combustion engine which will flush dirt periodically from the heat exchange surfaces of the LT-charge air cooler by using water condensed on the heat exchange surfaces for the flushing.