In a Rankine cycle system, a part of a liquid-phase heat medium that boils in a heat medium passage of an engine changes to a gas-phase heat medium. The gas-phase heat medium is superheated by a superheater that superheats by heat exchange with exhaust gas of the engine to be superheated steam. The superheated steam that passes through the superheater is blown to a turbine to rotate the turbine, and thereafter is condensed in a condenser. The turbine is connected to an output shaft of the engine by a power transmission pathway, and the power transmission pathway is provided with a clutch mechanism. A turbine outlet valve is provided between the turbine and the condenser, and an ECU closes the turbine outlet valve when the power transmission pathway is disconnected by an action of the clutch mechanism.

In a Rankine cycle system, a part of a liquid-phase heat medium that boils in a heat medium passage of an engine changes to a gas-phase heat medium. The gas-phase heat medium is superheated by a superheater that superheats by heat exchange with exhaust gas of the engine to be superheated steam. The superheated steam that passes through the superheater is blown to a turbine to rotate the turbine, and thereafter is condensed in a condenser. The turbine is connected to an output shaft of the engine by a power transmission pathway, and the power transmission pathway is provided with a clutch mechanism. A turbine outlet valve is provided between the turbine and the condenser, and an ECU closes the turbine outlet valve when the power transmission pathway is disconnected by an action of the clutch mechanism.

The invention relates to a method, system, and computer program product for controlling a waste heat recovery system associated with a vehicle powertrain, the powertrain comprising a combustion engine and a gearbox connected to the combustion engine, the waste heat recovery system comprising a working fluid circuit; an evaporator; an expander; a condenser; a reservoir for a working fluid and a pump arranged to pump the working fluid through the circuit, wherein the evaporator is arranged for heat exchange between the working fluid and at least one heat source, wherein the waste heat recovery system further comprises a cooling circuit arranged in connection to the condenser, and wherein the expander is mechanically coupled to the powertrain. The method comprises the steps of determining the pressure and temperature of the working fluid upstream of the expander; and controlling the rotational speed of the expander based on the determined pressure and temperature.

A waste-heat recovery system may include a waste-heat recovery circuit in which a working fluid is circulatable and which has a high pressure region and a low pressure region. The system may also include a conveying device configured to drive the working fluid, a steam generator configured to evaporate the working fluid, an expansion machine configured to expand the working fluid via mechanical work, at least one condenser configured to condense the working fluid, a container arranged downstream of the at least one condenser, and a divider arranged in a container interior of the container which may divide the container interior into a first sub-chamber and a second sub-chamber. The second sub-chamber may be Tillable with a coolant, which is introducible into the at least one condenser fluidically separately from the working fluid via a fluid line, such that the working fluid is condensable via thermal interaction with the coolant.

Provided is a method for controlling a waste heat recovery system associated with a powertrain of a vehicle, the powertrain comprising a combustion engine and a gearbox connected to the combustion engine, the waste heat recovery system comprising a working fluid circuit; an evaporator; an expander; a condenser; a reservoir for a working fluid and a pump arranged to pump the working fluid through the circuit, wherein the evaporator is arranged for heat exchange between the working fluid and at least one heat source, wherein the waste heat recovery system further comprises a cooling circuit arranged in connection to the condenser, and wherein the expander is mechanically connected to the powertrain. The method comprises the steps of: predicting a downhill slope which will require braking of the vehicle; reducing the temperature of the evaporator to a predetermined temperature; and turning off the pump and thus the waste heat recovery system.

A power generation system includes a reactor operable to produce a flow of hydrogen and a flow of steam in response to the receipt of a flow of reactant mixture. A combustor is operable to produce a flow of combustion gas in response to the receipt of the flow of hydrogen and a first portion of the flow of steam, a turbine is operable to produce rotation of a first shaft in response to the receipt of the flow of combustion gas, and a steam turbine is operable to produce rotation of a second shaft in response to the receipt of a second portion of the flow of steam.

A power generation system includes a reactor operable to produce a flow of hydrogen and a flow of steam in response to the receipt of a flow of reactant mixture. A combustor is operable to produce a flow of combustion gas in response to the receipt of the flow of hydrogen and a first portion of the flow of steam, a turbine is operable to produce rotation of a first shaft in response to the receipt of the flow of combustion gas, and a steam turbine is operable to produce rotation of a second shaft in response to the receipt of a second portion of the flow of steam.

An internal combustion engine system with heat recovery includes an internal combustion engine with a waste heat passage, an electric motor, a heat recovery assembly including a working fluid circulation circuit with a working fluid, a first heat source which is adapted to be heated by the waste heat passage and adapted to heat the working fluid, and an expander engine, which is operated by the heated working fluid, and a splitting device, which is connected to the electric motor and is adapted to be connected to a drivetrain of a vehicle and which splitting device is further connected to the expander engine, so that the expander engine is enabled to drive the drivetrain and/or the electric motor. The internal combustion engine system further includes at least a second heat source for providing heat to the heat recovery assembly. A vehicle including such an internal combustion engine system is also provided.

An internal combustion engine system with heat recovery includes an internal combustion engine with a waste heat passage, an electric motor, a heat recovery assembly including a working fluid circulation circuit with a working fluid, a first heat source which is adapted to be heated by the waste heat passage and adapted to heat the working fluid, and an expander engine, which is operated by the heated working fluid, and a splitting device, which is connected to the electric motor and is adapted to be connected to a drivetrain of a vehicle and which splitting device is further connected to the expander engine, so that the expander engine is enabled to drive the drivetrain and/or the electric motor. The internal combustion engine system further includes at least a second heat source for providing heat to the heat recovery assembly. A vehicle including such an internal combustion engine system is also provided.

The purpose of the present invention is to provide a furnace wall in which a throat section with a smaller channel diameter than other regions can be formed using all peripheral wall tubes. Provided is a furnace wall comprising: a plurality of peripheral wall tubes (142), which are disposed so as to form a cylindrical shape when aligned in one direction and through the interior of which cooling water flows; and fins (140) that connect neighboring peripheral wall tubes (142) in an airtight manner. In a throat section in which the diameter of a horizontal cross-section of the cylindrical shape is reduced in comparison to other regions, the peripheral wall tubes (142) are disposed so as to be in mutual contact and the fins (140) are disposed on the inner circumferential sides of the cylindrical shapes.