Abstract: Single expander device working with two working media in a two-stage organic Rankine cycle, which has a cylinder body, a rotor disposed inside the cylinder body and provided with a number of slip sheets in a radial direction of the cylinder body, and a rotary shaft fixedly connected to the center of the rotor, with the outer profile of the cylinder body defined by two mathematical equations.

Abstract: A rotary compressor includes a housing having a generally cylindrical chamber and rotor mounted eccentrically within the chamber to define about the rotor a main chamber region, which narrows to a constricted region. There is an intake port formed in the housing for introducing air into the main chamber region and an exhaust port for discharging air from the constricted chamber region. At least pair of curved vanes are pivotably attached to the rotor and extend in generally opposite arcuate directions from the rotor into the chamber. The rotor is driven in a single direction such that the vanes are urged against the walls of chamber to define at least one compartment that transmits air from the main chamber region to the constricted chamber region. This compresses the air, which is discharged through the exhaust port.

Abstract: A reversible rotary internal combustion engine comprising a stator which defines a cylindrical chamber (43), a drive shaft (1) extending coaxially through the chamber, a rotor (2) comprising a cylindrical hub mounted coaxially on the drive shaft and a rotor arm (3) extending radially from the hub, two radially movable wall members (4a, 4b) mounted in the stator, each of the wall members having a retracted position in which the radially inner face of the wall member lies flush with the inner periphery of the stator and an inserted position in which the face of the wall member is in contact with the peripheral surface of the hub, means (8a, 8b) for selecting one of the wall members (4a, 4b) to lie normally in the inserted position so as to divide the chamber (43) into a combustion chamber (47) between such wall member and the rotor arm (3) and an air compression chamber (48), means (12, 13) for introducing air and a fuel into the combustion chamber (47) whereby upon ignition of the fuel/air mixture the combusti