Wartsila Finland Oy | Date: 2013-03-08
An arrangement is disclosed for connecting at least one double-walled pipe of stainless steel to a LNG tank having an inner shell of stainless steel and an outer shell spaced at a distance from the inner shell, the inner and outer shells defining an isolation space therebetween. The at least one double-walled pipe includes a common outer wall and at least one inner pipe. The outer wall of the pipe is connected to the inner shell of the tank in such a way that the outer wall and/or a pipe fitting of cold resistant material between the inner shell and the outer wall is arranged to compensate for changes in the length of the outer wall of the pipe and/or of the pipe fitting due to temperature differences between the outer wall of the pipe and the inner shell of the tank.
Wartsila Finland Oy | Date: 2012-08-31
An arrangement for high temperature fuel cell system for substantially reducing the amount of purge gas in an emergency shut-down situation. The arrangement includes a known volume for containing a pneumatic actuation pressure, the known volume including at least one discharge route for designed discharge rate, at least one pressure source providing pressure capable of performing the pneumatic actuation, at least one purge gas source having a gas overpressure capable of displacing residual reactants in the fuel cell system. Purge gas is discharged through the discharge route causing pressure decline in the known volume, accomplishing a designed time delay in state change of at least one pneumatically actuated valve, to reduce or close down completely emergency shutdown actuated flow of the purge gas into the fuel cell system piping after the designed time delay.
Wartsila Finland Oy | Date: 2012-04-27
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.
Wartsila Finland Oy | Date: 2012-01-24
A pipe connector comprising a connector body, a first fitting connectable to a first double wall pipe, the first fitting comprising a first portion connectable to an inner flow space and a second portion connectable to an outer flow space of the first double wall pipe, a second fitting connectable to a second pipe, a third fitting comprising a first portion and a second portion, which first portion is connectable to the third pipe, and a flow channel arranged in the connector body for interconnecting the first portion of the first fitting, the second fitting and the first portion of the third fitting. The pipe connector comprises a leak channel arranged in flow connection with the second portion of the first fitting, a leakage outlet for discharging fluid from the leak channel, a discharge channel extending from the second portion of the third fitting to the leakage outlet and providing a continuous flow connection therebetween, and a closure member having a first position, in which fluid flow from the leak channel to the leakage outlet is prevented, and a second position, in which fluid flow from the leak channel to the leakage outlet is allowed. The closure member is arranged to move from the first position to the second position when fluid pressure in the leak channel rises above a certain limit.
Wartsila Finland Oy | Date: 2012-02-01
An exhaust gas receiver that is connectable to an internal combustion engine for receiving exhaust gases from the engine, the exhaust gas receiver comprising a receiver chamber, at least one exhaust inlet, at least one exhaust outlet, and a reducing agent duct, at least a portion of the reducing agent duct being arranged inside the receiver chamber for heating the reducing agent before the reducing agent is mixed with the exhaust gases. The invention also concerns an internal combustion engine and a method for selective catalytic reduction.