A method of operating a thermal exchange engine having a thermal energy conduction surface and rotating elements in the vessel which form a plurality of closed working chambers which increase or decrease in volume as the rotating elements move. The method involves placing a phase change fluid in each of the working chambers and operating the vessel as on a closed cycle without addition of phase change fluid into the vessel or removal of phase change fluid from the vessel. The method involves applying thermal energy to the thermal energy conduction surface, thereby thermally increasing or decreasing a pressure inside at least one working chamber positioned adjacent to the thermal energy conduction surface, such that the change in pressure inside the at least one working chamber causes the rotating elements to move the at least one working chamber away from the thermal energy conduction surface.

A downhole drill pipe may comprise a transducer disposed therein, capable of converting energy from flowing fluid into electrical energy. A portion of a fluid flowing through the drill pipe may be diverted to the transducer. After passing the transducer, the diverted portion of the fluid may be discharged to an exterior of the drill pipe. To generate electrical energy while not obstructing the main fluid flow from passing through the drill pipe, the transducer may be disposed within a lateral sidewall of the drill pipe with an outlet for discharging fluid exposed on an exterior of the lateral sidewall.

A downhole drill pipe may comprise a transducer disposed therein, capable of converting energy from flowing fluid into electrical energy. A portion of a fluid flowing through the drill pipe may be diverted to the transducer. After passing the transducer, the diverted portion of the fluid may be discharged to an exterior of the drill pipe. To generate electrical energy while not obstructing the main fluid flow from passing through the drill pipe, the transducer may be disposed within a lateral sidewall of the drill pipe with an outlet for discharging fluid exposed on an exterior of the lateral sidewall.

An improved vane pump assembly is provided. The vane pump assembly includes a housing with an open chamber that is circular in shape when viewed in cross-section and has an inner wall that surrounds the open chamber. A rotor is rotatably disposed in the open chamber of the housing. As with the open chamber, the rotor is circular in shape when viewed in cross-section and has a diameter. The rotor further has at least one through-passage which extends diametrically across the rotor. The rotor is positioned such that it has a center that is offset from a center of the circular open chamber of the housing.

Accordingly, embodiments herein disclose a system (500) for controlling admission volume of an inlet gas for fixed RPM operation of in an apparatus. The system (500) has a boiler (502) for generating a steam at a higher pressure for heating application in a process. A pressure reducing valve (PRV) (504) controls a boiler pressure to process pressure. Inlet ports and exhaust ports are configured by intersection of opening on a rotor housing (614) and opening on a rotating valve. The inlet ports are designed in such a way that a port opening duration can be controlled to admit required volume of a steam corresponding to a mass flow requirement of the process. A port capable of changing the area and timing of opening in such a way that the duration and starting of exhaust can be controlled.

Accordingly, embodiments herein disclose a system (500) for controlling admission volume of an inlet gas for fixed RPM operation of in an apparatus. The system (500) has a boiler (502) for generating a steam at a higher pressure for heating application in a process. A pressure reducing valve (PRV) (504) controls a boiler pressure to process pressure. Inlet ports and exhaust ports are configured by intersection of opening on a rotor housing (614) and opening on a rotating valve. The inlet ports are designed in such a way that a port opening duration can be controlled to admit required volume of a steam corresponding to a mass flow requirement of the process. A port capable of changing the area and timing of opening in such a way that the duration and starting of exhaust can be controlled.

Accordingly, embodiments herein disclose a system (500) for controlling admission volume of an inlet gas for fixed RPM operation of in an apparatus. The system (500) has a boiler (502) for generating a steam at a higher pressure for heating application in a process. A pressure reducing valve (PRV) (504) controls a boiler pressure to process pressure. Inlet ports and exhaust ports are configured by intersection of opening on a rotor housing (614) and opening on a rotating valve. Inlet ports are configured so that a port opening duration can be controlled to admit required volume of a steam corresponding to a mass flow requirement of the process. A port capable of changing the area and timing of opening in such a way that the duration and starting of exhaust can be controlled.

Accordingly, embodiments herein disclose a system (500) for controlling admission volume of an inlet gas for fixed RPM operation of in an apparatus. The system (500) has a boiler (502) for generating a steam at a higher pressure for heating application in a process. A pressure reducing valve (PRV) (504) controls a boiler pressure to process pressure. Inlet ports and exhaust ports are configured by intersection of opening on a rotor housing (614) and opening on a rotating valve. Inlet ports are configured so that a port opening duration can be controlled to admit required volume of a steam corresponding to a mass flow requirement of the process. A port capable of changing the area and timing of opening in such a way that the duration and starting of exhaust can be controlled.

A pistonless rotary motor for air compressor includes a triangular rotor rotatably disposed in a rotor cavity of a housing. The housing further includes two opposite, radially spaced first grooves in the peripheral wall and two opposite, radially spaced second grooves in the peripheral wall. The first groove is proximate the intake and the second groove is proximate the exhaust. The first grooves are disposed at a top dead center of the rotor relative to the rotor cavity and configured to release air having a first pressure when the rotor revolves eccentrically. The second grooves are disposed the top dead center of the rotor relative to the rotor cavity when the rotor revolves eccentrically and configured to release air having a second pressure which is less than the first pressure.

A compressor pump structure comprises a rotating shaft, a piston, a cylinder, a cylinder sleeve, a lower flange and an upper flange, the central axis of the rotating shaft being arranged eccentrically with respect to the central axis of the cylinder, the rotating shaft being slidably arranged in the piston, the piston being movably arranged in the cylinder and forming two volume-variable chambers with the cylinder, the piston comprising two first sliding planes arranged opposite one another and two first contacting planes arranged opposite one another, the first contacting plane on the upper side being in sealing contact with the upper flange, and the first contacting plane on the lower side being in sealing contact with the lower flange. Also disclosed is a compressor with the compressor pump structure.