The multi-temperature double-acting piston includes a peripheral sealing ring, a lower hot crown and/or an upper hot crown, and moves in translation in a cold cylinder of a heat engine which includes a lower cylinder head and an upper cylinder head, the piston including a central piston pin the lower piston rod of which passes through the lower cylinder head so as to be connected to a power transmission housed in a transmission casing, and the upper piston rod of which passes through the upper cylinder head so as to open out into a piston cooling and lubricating chamber, a lubricating-cooling gallery provided in the pin putting the chamber in communication with the casing via an internal piston volume.

Reciprocating heat engine with hot cylinder head and cold cylinder includes a cooled cylinder casing which receives a cold cylinder covered with a lubricant film and in which a piston connected to power transmission moves in translation to form a variable-volume hot chamber with a hot cylinder head which is held applied but free to expand on the cylinder casing by cylinder head applying unit, while a hot crown is interposed between the chamber and the piston and is held applied but free to expand on the piston by crown applying unit, the piston including a cooled piston sealing ring which has a piston sealing unit.

A thermal power station and method for generating includes (a) at least one thermal energy storage having a housing, a storage chamber and a fluid inlet port fluidically connected to the storage chamber and a fluid outlet port connected to the storage chamber, and (b) a Brayton cycle heat engine including gas turbine, a cooler and a compressor connected with each other by a closed cycle containing a second working fluid, (c) the Brayton cycle heat engine further includes a control unit arranged for operating the Brayton cycle heat engine according to a Brayton cycle, (d) the gas turbine is thermally coupled to the at least one thermal energy storage by a first heat exchanger and a first working fluid, the first working fluid being different, and (e) the gas turbine is connected to a generator for producing electrical power by the thermal energy from the thermal energy storage.

An improved method and system of carbon sequestration of a pyrolysis piston engine power system is provided. The system includes a pyrolysis piston engine for generating power and exhaust gas and a water cooling and separation unit which receives the exhaust gas and cools and removes water from the exhaust gas to create C02 gas supply. The system also includes a mixing pressure vessel which receives at least a portion of the C02 gas supply from the water cooling and separation unit and mixes the C02 gas supply with oxygen to create a working fluid to be provided to the piston engine and an oxygen generator for providing oxygen to the mixing pressure vessel. The system also includes a pyrolysis interface for inputting byproducts from a pyrolysis system, wherein the pyrolysis interface comprises a pyrolysis gas interface and a pyrolysis gas/oil interface.

The regenerative cooling system (100) is provided for a regenerative heat engine (1) and comprises a cooling chamber (79) which surrounds a gas expander (78), leaving open a gas circulation space (80) between said chamber (79) and said expander (78), a working gas (81) expelled from the gas expander (78) circulating in said space (80) before returning to a regenerative heat exchanger (5) where it is cooled, a large portion of the heat of said gas (81) being reintroduced into the thermodynamic cycle of the regenerative heat engine (1).

The fluid-cushion sealing device (100) for a piston (101) moving in a cylinder (102) and defining with the latter a chamber to be sealed (104) includes: a continuous perforated ring (105) through the radial thickness of which passes a calibrated opening (111) and which is sealingly accommodated in a ring groove (109) provided in the piston (101) so as to define, with said groove (109), a pressure distribution chamber (119) connected to a pressurized fluid source (112), while an axially blind counter-pressure recess (115) is provided recessed on an external cylindrical ring surface (107) which faces the cylinder (102) and which the continuous perforated ring (105) comprises, the calibrated opening (111) leading into said recess (115).

Various systems and methods are provided for a turbocharger system. In one example, system for use with a power generator having a rotary machine including a combustor comprises: a heat exchanger positioned to receive exhaust gases from the combustor; and a turbocharger system, comprising: a low pressure turbocharger including a low pressure turbine adapted to receive gas flow from the heat exchanger and a low pressure compressor adapted to supply compressed air to the heat exchanger; a high pressure turbocharger including a high pressure turbine adapted to receive gas flow from the heat exchanger and a high pressure compressor adapted to receive gas flow from the low pressure compressor and supply compressed air to the rotary machine; and a second combustor adapted to inject exhaust gases into a flow path arranged between the heat exchanger and an inlet to each of the high pressure turbine and the low pressure turbine.

An improved method and system of carbon sequestration of a pyrolysis piston engine power system is provided. The system includes a pyrolysis piston engine for generating power and exhaust gas and a water cooling and separation unit which receives the exhaust gas and cools and removes water from the exhaust gas to create C02 gas supply. The system also includes a mixing pressure vessel which receives at least a portion of the C02 gas supply from the water cooling and separation unit and mixes the C02 gas supply with oxygen to create a working fluid to be provided to the piston engine and an oxygen generator for providing oxygen to the mixing pressure vessel. The system also includes a pyrolysis interface for inputting byproducts from a pyrolysis system, wherein the pyrolysis interface comprises a pyrolysis gas interface and a pyrolysis gas/oil interface.

Various systems and methods are provided for a turbocharger system. In one example, system for use with a power generator having a rotary machine including a combustor comprises: a heat exchanger positioned to receive exhaust gases from the combustor; and a turbocharger system, comprising: a low pressure turbocharger including a low pressure turbine adapted to receive gas flow from the heat exchanger and a low pressure compressor adapted to supply compressed air to the heat exchanger; a high pressure turbocharger including a high pressure turbine adapted to receive gas flow from the heat exchanger and a high pressure compressor adapted to receive gas flow from the low pressure compressor and supply compressed air to the rotary machine; and a second combustor adapted to inject exhaust gases into a flow path arranged between the heat exchanger and an inlet to each of the high pressure turbine and the low pressure turbine.

To provide refrigeration below 200 K, a Brayton cycle engine contains a light reciprocating piston. The refrigerator includes a compressor, a gas-balanced reciprocating engine having a cold rotary valve, a counterflow heat exchanger, a gas storage volume with valves that can adjust system pressures, a variable speed engine and a control system that controls gas pressure, engine speed, and the speed of the piston. The engine is connected to a load such as a cryopanel, for pumping water vapor, through insulated transfer lines.