The invention relates to a piston type axial expander (4) comprising: an intake cylinder head (10) for vapor under pressure comprising a vapor intake opening (100), an expansion zone comprising a plurality of cylinders (110), wherein a piston (111) sliding in each respective cylinder is connected to a shaft (40) by an inclined plate (20), each piston being parallel to said shaft. a plurality of poppet valves (12) arranged orthogonally to the shaft (40) in the intake cylinder head (10) allowing alternating intake of vapor into said cylinders (110), each valve (12) being controlled by a cam (21) arranged on the shaft (40), a lift mechanism (13) for each valve cooperating with the cam, a return mechanism for each valve.

The intake cylinder head (10) comprises: an enclosed and lubricated central zone (10A) comprising the cam and the lift and return mechanisms of the valves, a peripheral zone (10B) in which the intake opening (100) leads, extending around the central zone (10A).

An engine comprising: a sealed and rigid case containing a liquid and a work mixture of gas and steam from the liquid, a heat source able to heat the liquid, a cold source able to cool the work mixture, a movable device positioned within the case, which can move between a first position where the movable device minimize the contact between the work mixture and the cold source, and maximize the contact between the liquid and the work mixture, and a second position where the movable device maximize the contact between the work mixture and the cold source, and minimize the contact between the liquid and the work mixture, an actuator able to move the movable device from the first position to the second position and vice versa.

A fluid working machine has at least one working chamber of cyclically varying volume and low and high pressure valves to regulate the flow of working fluid into and out of the working chamber, from low and high pressure manifolds. The low and high pressure valves are actuated by electronically controlled valve actuation means which, when actuated, applies forces to the low and high pressure valve members to open and/or close the respective valves. The low and high pressure valve members are independently moveable and, although the low pressure valve member typically begins to move quickly in response to a shared valve control signal, the high pressure valve member typically moves only after a change in the pressure within the working chamber. The electronically controlled valve actuation means may be a shared electronically controlled valve actuator, such as a solenoid within a magnetic circuit which directs magnetic flux through both low pressure and high pressure valve armatures which are connected to the respective valve members.

A fluid working machine has at least one working chamber of cyclically varying volume and low and high pressure valves to regulate the flow of working fluid into and out of the working chamber, from low and high pressure manifolds. The low and high pressure valves are actuated by electronically controlled valve actuation means which, when actuated, applies forces to the low and high pressure valve members to open and/or close the respective valves. The low and high pressure valve members are independently moveable and, although the low pressure valve member typically begins to move quickly in response to a shared valve control signal, the high pressure valve member typically moves only after a change in the pressure within the working chamber. The electronically controlled valve actuation means may be a shared electronically controlled valve actuator, such as a solenoid within a magnetic circuit which directs magnetic flux through both low pressure and high pressure valve armatures which are connected to the respective valve members.

This invention presents a method for conversion of heat to electrical power through absorption of heat from any types of fluids with temperatures both higher and lower than 0° C. Heat can be absorbed from fossil or renewable energy resources. The mechanism in this invention uses fluid internal energy and enthalpy difference to generate power, where a reciprocating piston-cylinder system provides the required force to rotate a turbine for power generation.

This invention presents a method for conversion of heat to electrical power through absorption of heat from any types of fluids with temperatures both higher and lower than 0° C. Heat can be absorbed from fossil or renewable energy resources. The mechanism in this invention uses fluid internal energy and enthalpy difference to generate power, where a reciprocating piston-cylinder system provides the required force to rotate a turbine for power generation.

An engine comprising: a sealed and rigid case containing a liquid and a work mixture of gas and steam from the liquid, a heat source able to heat the liquid, a cold source able to cool the work mixture, a movable device positioned within the case, which can move between a first position where the movable device minimize the contact between the work mixture and the cold source, and maximize the contact between the liquid and the work mixture, and a second position where the movable device maximize the contact between the work mixture and the cold source, and minimize the contact between the liquid and the work mixture, an actuator able to move the movable device from the first position to the second position and vice versa.

An engine comprising: a sealed and rigid case containing a liquid and a work mixture of gas and steam from the liquid, a heat source able to heat the liquid, a cold source able to cool the work mixture, a movable device positioned within the case, which can move between a first position where the movable device minimize the contact between the work mixture and the cold source, and maximize the contact between the liquid and the work mixture, and a second position where the movable device maximize the contact between the work mixture and the cold source, and minimize the contact between the liquid and the work mixture, an actuator able to move the movable device from the first position to the second position and vice versa.

An active chamber engine, includes at least one piston (2) slidingly mounted in a cylinder (1) and operating according to a three-phase thermodynamic cycle including an isobaric and isothermal transfer, a polytropic expansion with work and an exhaust at ambient pressure, which is preferably supplied with compressed air contained in a high-pressure storage tank (12), in which the volume of the cylinder (1) swept by the piston is divided into an active chamber (CA) and an expansion chamber (CD), and in which the compressed air is used to move the intake valve (9) in order to open and then close the intake duct, making it possible to supply the active chamber of the engine, the compressed air having been used for the actions then being reused in the engine to produce additional work.

An active chamber engine, includes at least one piston (2) slidingly mounted in a cylinder (1) and operating according to a three-phase thermodynamic cycle including an isobaric and isothermal transfer, a polytropic expansion with work and an exhaust at ambient pressure, which is preferably supplied with compressed air contained in a high-pressure storage tank (12), in which the volume of the cylinder (1) swept by the piston is divided into an active chamber (CA) and an expansion chamber (CD), and in which the compressed air is used to move the intake valve (9) in order to open and then close the intake duct, making it possible to supply the active chamber of the engine, the compressed air having been used for the actions then being reused in the engine to produce additional work.