The invention relates to a hydrogen compressor (10) with metal hydride comprising: a pressure chamber (20), comprising an inner space, defined by a first inner surface (21); a shell (70) with a thickness E, the shell (70) comprising a first outer surface (71) facing the first inner surface (21), the shell (70) comprising an insulating material with first thermal conductivity; and a hydrogen storage element (50), contained in the shell (70), comprising a storage material suitable for storing or releasing hydrogen as a function of a temperature that is imposed on same, and having a second thermal conductivity higher than the first thermal conductivity.

The invention relates to a hydrogen compressor (10) with metal hydride comprising: a pressure chamber (20), comprising an inner space, defined by a first inner surface (21); a shell (70) with a thickness E, the shell (70) comprising a first outer surface (71) facing the first inner surface (21), the shell (70) comprising an insulating material with first thermal conductivity; and a hydrogen storage element (50), contained in the shell (70), comprising a storage material suitable for storing or releasing hydrogen as a function of a temperature that is imposed on same, and having a second thermal conductivity higher than the first thermal conductivity.

A fluid ejection device may include a first channel having a first end and a second end, a first drop ejector along the first channel, a second channel having a first end and a second end, a second drop ejector along the second channel, a third channel extending between and connecting the first end of the first channel and the first end of the second channel, a fourth channel extending between and connecting the second end of the first channel and the second end of the second channel and a fifth channel extending between and connecting the third channel and the fourth channel.

A fluid ejection device may include a first channel having a first end and a second end, a first drop ejector along the first channel, a second channel having a first end and a second end, a second drop ejector along the second channel, a third channel extending between and connecting the first end of the first channel and the first end of the second channel, a fourth channel extending between and connecting the second end of the first channel and the second end of the second channel and a fifth channel extending between and connecting the third channel and the fourth channel.

A heat engine with a dynamically controllable hydraulic outlet driven by a high-pressure pump and a gas turbine that include a pressure vessel (1), a lid (1.1), a movable partition (2), a gas working space (4), a liquid working space (5), and a recuperator (7), wherein a sealing (1.4) is disposed between the pressure vessel (1) and the lid (1.1), wherein in the inner space of the pressure vessel (1) the partition (2) is movably attached to a folded membrane (3) which is attached to the lid (1.1), wherein the partition (2) divides the inner space of the pressure vessel (1) into the gas working space (4) and the liquid working space (5), and shaped parts (1.8) are arranged within the pressure vessel, which define an external gas channel (10) which is led between a shell of the pressure vessel (1) and the shaped parts.

A heat engine with a dynamically controllable hydraulic outlet driven by a high-pressure pump and a gas turbine that include a pressure vessel (1), a lid (1.1), a movable partition (2), a gas working space (4), a liquid working space (5), and a recuperator (7), wherein a sealing (1.4) is disposed between the pressure vessel (1) and the lid (1.1), wherein in the inner space of the pressure vessel (1) the partition (2) is movably attached to a folded membrane (3) which is attached to the lid (1.1), wherein the partition (2) divides the inner space of the pressure vessel (1) into the gas working space (4) and the liquid working space (5), and shaped parts (1.8) are arranged within the pressure vessel, which define an external gas channel (10) which is led between a shell of the pressure vessel (1) and the shaped parts.

A microfabricated gas flow structure includes an array of vertical gas flow channels in a side-by-side parallel flow arrangement. Adjacent gas flow channels are separated by a thin wall having a thickness which can be an order of magnitude or more less than the channel width, offering exceptionally high area efficiency for the array. Channel walls can be formed from a dielectric material to provide the walls with sufficient integrity at nanoscale thicknesses and to provide thermal insulative properties in the lateral direction, thereby controlling power losses when the gas flow structure is employed as a Knudsen pump. The gas flow structure can be microfabricated as a monolithic structure from an SOI wafer, with the gas flow channels formed in the device layer and the heat sink formed from the handle layer.

A microfabricated gas flow structure includes an array of vertical gas flow channels in a side-by-side parallel flow arrangement. Adjacent gas flow channels are separated by a thin wall having a thickness which can be an order of magnitude or more less than the channel width, offering exceptionally high area efficiency for the array. Channel walls can be formed from a dielectric material to provide the walls with sufficient integrity at nanoscale thicknesses and to provide thermal insulative properties in the lateral direction, thereby controlling power losses when the gas flow structure is employed as a Knudsen pump. The gas flow structure can be microfabricated as a monolithic structure from an SOI wafer, with the gas flow channels formed in the device layer and the heat sink formed from the handle layer.

A cryogenic pump includes a drive assembly and a pressurization assembly operatively coupled to each other. The drive assembly includes a housing having sidewall and piston slidably disposed therein, the sidewall and a first surface of piston defining expansion chamber. A fuel supply valve is provided in fluid communication with supply of liquid cryogenic fuel and configured to selectively provide liquid cryogenic fuel into expansion chamber. A heating element extends at least partially into expansion chamber to heat and facilitate vaporization of liquid cryogenic fuel, thereby increasing pressure within expansion chamber and causing movement of piston in first direction. The pressurization assembly includes barrel defining bore and a plunger slidably disposed therein to define pressurization chamber for receiving liquid cryogenic fuel. The plunger is driven by the piston such that the movement of piston in first direction causes movement of plunger to pressurize cryogenic fuel within pressurization chamber.

A cryogenic pump includes a drive assembly and a pressurization assembly operatively coupled to each other. The drive assembly includes a housing having sidewall and piston slidably disposed therein, the sidewall and a first surface of piston defining expansion chamber. A fuel supply valve is provided in fluid communication with supply of liquid cryogenic fuel and configured to selectively provide liquid cryogenic fuel into expansion chamber. A heating element extends at least partially into expansion chamber to heat and facilitate vaporization of liquid cryogenic fuel, thereby increasing pressure within expansion chamber and causing movement of piston in first direction. The pressurization assembly includes barrel defining bore and a plunger slidably disposed therein to define pressurization chamber for receiving liquid cryogenic fuel. The plunger is driven by the piston such that the movement of piston in first direction causes movement of plunger to pressurize cryogenic fuel within pressurization chamber.