There is provided a rotary heat pump capable of realizing further miniaturization, compared with a current status. As means of solution, a rotary heat pump includes: a rotary drive section including: a rotary shaft; a stationary gear; a rotor that has a rotor gear engaged with the stationary gear and that makes an eccentric rotation; a rotary housing along a peritrochoid curve defined by the eccentric rotation of the rotor; and a first side housing and a second side housing that cover one end side and the other end side of the rotary housing and that fix the stationary gear; a heat exchange fin provided in each of a compression region that is demarcated by the rotor and the rotary housing and that has a smallest planar area and an expansion region that has the largest planar area; and a heat insulation portion formed in a boundary portion between the compression region and the expansion region.

There is provided a rotary heat pump capable of realizing further miniaturization, compared with a current status. As means of solution, a rotary heat pump includes: a rotary drive section including: a rotary shaft; a stationary gear; a rotor that has a rotor gear engaged with the stationary gear and that makes an eccentric rotation; a rotary housing along a peritrochoid curve defined by the eccentric rotation of the rotor; and a first side housing and a second side housing that cover one end side and the other end side of the rotary housing and that fix the stationary gear; a heat exchange fin provided in each of a compression region that is demarcated by the rotor and the rotary housing and that has a smallest planar area and an expansion region that has the largest planar area; and a heat insulation portion formed in a boundary portion between the compression region and the expansion region.

Systems and methods for a heat engine system are described. In one embodiment, a system comprises a heat engine compressor, a heat exchanger, and a heat engine expander. The system comprises a partial state condenser in fluid communication with the heat engine expander. The partial state condenser includes a sense reservoir to hold the working fluid, a reservoir sensor to sense an electrical property of the working fluid, and a reservoir valve. The reservoir valve is in fluid communication with the sense reservoir, the heat engine compressor, and a heat engine condenser. The system comprises a processor to execute instructions to determine a specific energy of working fluid based on the electrical property of the working fluid and control the reservoir valve based on the specific energy to maintain a two-phase saturated state point within the partial state condenser based on the electrical property.

Systems and methods for a heat engine system are described. In one embodiment, a system comprises a heat engine compressor, a heat exchanger, and a heat engine expander. The system comprises a partial state condenser in fluid communication with the heat engine expander. The partial state condenser includes a sense reservoir to hold the working fluid, a reservoir sensor to sense an electrical property of the working fluid, and a reservoir valve. The reservoir valve is in fluid communication with the sense reservoir, the heat engine compressor, and a heat engine condenser. The system comprises a processor to execute instructions to determine a specific energy of working fluid based on the electrical property of the working fluid and control the reservoir valve based on the specific energy to maintain a two-phase saturated state point within the partial state condenser based on the electrical property.

A gas-cycle system operable using a Bell-Coleman cycle, the gas-cycle system comprising an expander (23) and a compressor (27) incorporated in a flow path (13). The expander (23) and compressor (27) are integrated in a rotary machine (41), and each comprises a rotor assembly (70) configured to define one or more zones (80) each of which changes continuously in volume during a rotation cycle of the rotor assembly. The expander (23) and compressor (27) are drivingly interconnected whereby rotational drive applied to one is transmitted directly to the other. Each rotor assembly (70) comprises an inner rotor (73) and an outer rotor (75) adapted to rotate about parallel axes at different rotational speeds. The inner rotors (73) are each drivingly connected to a common shaft for rotation therewith. The two outer rotors (75) are coupled together such that rotational drive applied to one is transmitted directly to the other. An air-cycle system and an air conditioning system (10) based on the gas-cycle system are also disclosed.

A gas-cycle system operable using a Bell-Coleman cycle, the gas-cycle system comprising an expander (23) and a compressor (27) incorporated in a flow path (13). The expander (23) and compressor (27) are integrated in a rotary machine (41), and each comprises a rotor assembly (70) configured to define one or more zones (80) each of which changes continuously in volume during a rotation cycle of the rotor assembly. The expander (23) and compressor (27) are drivingly interconnected whereby rotational drive applied to one is transmitted directly to the other. Each rotor assembly (70) comprises an inner rotor (73) and an outer rotor (75) adapted to rotate about parallel axes at different rotational speeds. The inner rotors (73) are each drivingly connected to a common shaft for rotation therewith. The two outer rotors (75) are coupled together such that rotational drive applied to one is transmitted directly to the other. An air-cycle system and an air conditioning system (10) based on the gas-cycle system are also disclosed.

The invention relates to a charged rotary internal combustion engine with intake air internal cooling (EM), characterized in that in the connection between components to be cooled and the inlet into the working area at least one shut-off device (V) is provided, through which charging pressure can escape.

The invention prevents a decrease in strength of a screw rotor including a hollow portion and improves cooling performance. There is provided a screw rotor having a helical tooth on an outer periphery, the helical tooth extending by a predetermined length in an axial direction, in which a radial cross section of the screw rotor includes a cross section of a tooth portion, a cross section of an axial portion, a cross section of a support portion connected to an axial side of a tooth bottom or a tooth tip in the cross section of the tooth portion and an outer diameter side of the axial portion, and a cross section of a hollow portion formed by the support portions adjacent to each other in a rotational direction and an axial side inner surface of the tooth bottom or the tooth tip, and an axial longitudinal cross section of the screw rotor is a cross section in which the axial portion, the support portion, the axial side of the tooth bottom or the tooth tip, and an axial end portion of the screw rotor are continuously connected to each other as an integral structure by a three-dimensional fabrication method or the like.

The invention prevents a decrease in strength of a screw rotor including a hollow portion and improves cooling performance. There is provided a screw rotor having a helical tooth on an outer periphery, the helical tooth extending by a predetermined length in an axial direction, in which a radial cross section of the screw rotor includes a cross section of a tooth portion, a cross section of an axial portion, a cross section of a support portion connected to an axial side of a tooth bottom or a tooth tip in the cross section of the tooth portion and an outer diameter side of the axial portion, and a cross section of a hollow portion formed by the support portions adjacent to each other in a rotational direction and an axial side inner surface of the tooth bottom or the tooth tip, and an axial longitudinal cross section of the screw rotor is a cross section in which the axial portion, the support portion, the axial side of the tooth bottom or the tooth tip, and an axial end portion of the screw rotor are continuously connected to each other as an integral structure by a three-dimensional fabrication method or the like.

A pivoting flap valve is provided for an internal combustion rotary that produces mechanical torque. The engine includes an annular planar housing with a substantially circular annulus flanked by first and second cavities, an axial shaft, a rotor disposed on the shaft and rotating within the annulus. The valve is disposed within one cavity of said cavities and includes an arc wedge and a pivot shaft. The wedge has outer convex surface and an inner concave surface and a shaft hole between and parallel to the surfaces along a rocking axis. The pivot shaft passes through the shaft hole that enables the wedge to rock back and forth within the cavity in the annular planar housing without interference with the cam block. Each valve includes indents to pass around fore and aft circular wings on a rotor. The engine includes the housing, the rotor, first and second sparkplugs, first and second flap valves, an axial shaft and fore-and-aft covers. The housing includes a quadrilateral symmetry including a substantially circular annulus flanked by first and second cavities. The wings of the rotor intermittently block at least one port while the axial shaft rotates.