A power module includes a turbine arranged along a rotation axis, an interconnect shaft fixed in rotation relative to the turbine, and a compressor with a regenerative compressor wheel. The regenerative compressor wheel is fixed in rotation relative to the interconnect shaft supported for rotation with the turbine about the rotation axis. Generator arrangements, unmanned aerial vehicles, and methods of generating electrical power are also described.

A cleaning system comprises a power plant, a regenerative blower having a power input shaft, a suction port, and a discharge port, an interface assembly configured for transmitting power from the power plant to the regenerative blower, a pump configured for generating pressurized water, and a heat exchanger system configured for heating the pressurized water.

A progressive vortex pump comprises an inlet housing in contact with the pumped fluid, a pump housing connected to the inlet housing, and an outlet housing connected to the pump housing and connected to a pumping pipe. The pump housing comprises a disc-shaped rotor having a central bore and a rim with vanes. Each rotor comprises at least one through hole along the axial direction, the through hole being positioned between the central bore and the rotor rim. Advantageously, the presence of a through hole on the rotor enables, under operating conditions, fluid exchange from the posterior fluid film to the anterior fluid film, thus promoting a pressure balance between the posterior and anterior fluid films, therefore enabling the rotor to work evenly, preventing rubbing on adjacent diffusers.

A method for controlling speeds of compressors arranged in series for compressing a fluid. The desired inlet pressure is predefined and the actual inlet pressure is detected. The actual discharge pressure of the fluid is recorded and the actual total pressure ratio is recorded. A proportional integral value is determined from the deviation of the actual inlet pressure from the desired inlet pressure and a capacity factor is determined from the proportional integral value and the actual total pressure ratio. A model total pressure ratio is determined from the actual total pressure ratio and the capacity factor. A reduced desired speed for each compressor is determined as a function value of the control function associated with the respective compressor. The control function assigns a reduced desired speed to each value pair of capacity factor and model total pressure ratio and is used to adjust the speed of each compressor.

A pumping system for carbon dioxide applications comprises a plurality of centrifugal pumps each provided with one or more dry gas seals, and one or more barrier fluid delivery circuits for fluidly connecting the pump discharge of a pump in a running condition to at least one dry gas seal of another pump in standby condition. The pumps of the pumping system may be switched between a running condition and a standby condition through a control unit.

A system includes an inductor assembly of an agricultural implement having an inductor box with a wall configured to separate an interior of the inductor box from an exterior of the inductor box, an inductor segment, and a mounting clip. The wall includes an inner surface in the interior and an outer surface on the exterior. The inductor segment includes a mixing portion and a delivery portion, wherein the mixing portion interfaces with the inner surface and is configured to mix agricultural product and airflow into a mixture. The delivery portion is configured to convey the mixture through the wall. The mounting clip is configured to form a seal between the interior and the exterior of the inductor box, and to interface with the outer surface and the delivery portion in an installed position to couple the inductor segment to the inductor box.

The invention relates to a side-channel machine having a housing, located in the housing side-channel for guiding a gas, and at least one gas inlet opening which is formed in the housing and is fluidically connected to the side-channel. Furthermore, the side-channel machine has at least one gas inlet pipe which connects to the at least one gas inlet opening. The side-channel machine further comprises at least one gas outlet opening and at least one gas outlet pipe which connects to the at least one gas outlet opening. Furthermore, the side-channel machine has an impeller that can be made to rotate in the housing, with impeller blades, which bound impeller cells arranged in the side-channel, for delivering the gas in the impeller cells from the at least one gas inlet opening to the at least one gas outlet opening. The side-channel machine further has at least one interrupter arranged between the at least one gas inlet opening and the at least one gas outlet opening.

A convector includes a rotor having a shaft extending along an axis of rotation, and a plurality of discs offset from one another along the axis of rotation and mechanically coupled to and rotatable with the shaft. The convector also includes a stator having a plurality of plates offset from one another along the axis of the shaft. Each plate of the plurality of plates defines a through-hole configured to receive the shaft and an opening configured to receive a corresponding disc of the plurality of discs. Rotation of the shaft causes each disc to rotate at least partially within the opening defined by the corresponding plate, and relative to the corresponding plate.

A convector includes a rotor having a shaft extending along an axis of rotation, and a plurality of discs offset from one another along the axis of rotation and mechanically coupled to and rotatable with the shaft. The convector also includes a stator having a plurality of plates offset from one another along the axis of the shaft. Each plate of the plurality of plates defines a through-hole configured to receive the shaft and an opening configured to receive a corresponding disc of the plurality of discs. Rotation of the shaft causes each disc to rotate at least partially within the opening defined by the corresponding plate, and relative to the corresponding plate.

A fluid vapor distillation apparatus. The apparatus includes a source fluid input, and an evaporator condenser apparatus. The evaporator condenser apparatus includes a substantially cylindrical housing and a plurality of tubes in the housing. The source fluid input is fluidly connected to the evaporator condenser and the evaporator condenser transforms source fluid into steam and transforms compressed steam into product fluid. Also included in the fluid vapor distillation apparatus is a heat exchanger fluidly connected to the source fluid input and a product fluid output. The heat exchanger includes an outer tube and at least one inner tube. Also included in the fluid vapor distillation apparatus is a regenerative blower fluidly connected to the evaporator condenser. The regenerative blower compresses steam, and the compressed steam flows to the evaporative condenser where compressed steam is transformed into product fluid.