Abstract: A hydrogen production plant, to produce hydrogen having a compressing assembly, for increasing the pressure of the hydrogen. The compressing assembly has at least one barrel compressor and at least one integrally geared centrifugal compressor. Also disclosed are methods of compressing hydrogen.

Abstract: One aspect described in this application provides an apparatus that includes an external tray hose with an integrated booster pump for cooling a computing device. The booster pump can boost fluid flow and fluid pressure of coolant fluid pumped toward the computing device on a server tray. The booster pump includes a stator mounted around a booster pump housing with a bore. The stator includes one or more C-shaped lamination stacks for supporting coil windings. Energized coil windings generate a varying magnetic field for rotating an impeller within a housing bore to pump fluid along the housing bore of the booster pump. The apparatus includes a monitor module to monitor a set of sensors to obtain information about one or more of fluid temperature, fluid pressure, and device temperature; and a control module to adjust performance of the booster pump based on the information obtained from the set of sensors.

Abstract: The present disclosure relates to a rotor assembly 102 for a turbomolecular pump 100. The rotor assembly 102 comprises a rotor shaft 116, a plurality of rotor blades 126 extending from the rotor shaft 116, and a balancing member 130 fitted within the rotor shaft 116 with an interference fit. The rotor shaft 116 extends along a longitudinal axis 122 about which the rotor assembly 102 is configured to rotate. The interference fit is such that the balancing member 130 is retained in compression by the rotor assembly 102. The present disclosure also relates to a turbomolecular pump 100 including the rotor assembly 102 and a method of assembling a rotor assembly 102 for the same.

Abstract: A bladeless impeller and a bladeless axial pump having such an impeller, wherein the impeller has at least one rigid body suitable for rotating around at least one axis of rotation, and at least one helical groove located in the body, forming a passage between two parts of the body.

Abstract: A system and method of pumping low-density liquids, such as liquid hydrogen (LH2), includes a plurality of integrated motor/pump modules (IMPs) interconnected in series, each having a single IMP impeller. A controller separately adjusts the speeds of the IMP impellers such that a specified head of the pumping system is achieved, while a critical NPSH_c of each IMP remains below its NPSH_A. The IMPs can be identical, and the controller can cause all of the impellers to rotate at the same speed, except for any that require a speed reduction to ensure that its NPSH_c remains below its NPSH_A. The IMPs can comprise induction coils or permanent magnets attached to the impellers that pass in proximate radial or axial alignment with stator coils. The IMPs can be controlled by variable frequency drives (VFDs). A cooling system can transfer heat from within the IMP to an external heat destination.

Abstract: A vacuum pump includes a vacuum pump main body and a bottom fixing member. The vacuum pump main body has a bottom surface and a side surface. The side surface has a pump-side flat surface formed so as to extend from the bottom surface. The bottom fixing member is fastened to the bottom surface of the vacuum pump main body. The bottom fixing member has a fixing-side flat surface facing the pump-side flat surface.

Abstract: A lift system for pumping fluid from a well has a drive mechanism, a submersible pump, a gear assembly, and input and output shafts rotated by the drive mechanism extending through and into the pump.

Abstract: Smart fans are described that can be used in any application in which a flow of a fluid, such as air, is required. In two specific applications, one or more of the fans can be used to conduct a blower door test or a duct leakage test. However, the smart fans described herein can be used in other applications.

Abstract: A device configured to generate an air flow, the device including: a compressor; an air flow duct arranged to convey a flow of air generated by the compressor; a gas-filled cavity disposed beside the air flow duct; a wall separating the air flow duct and the cavity, the wall including at least one aperture; and an acoustic resistive screen covering and held in tension over the aperture of the wall. The screen is in fluid contact with air in the air flow duct and gas in the cavity and is configured to resist air flow between the duct and the cavity. The resistive screen and the cavity together define a noise-damping resonator.

Abstract: A blade root cover segment suitable for fitting to a wind turbine blade to span a gap between the blade and a spinner cover. The blade root cover segment includes a first end and a second end and further includes a curved flange for abutting against a correspondingly curved surface of the wind turbine blade; a cover wall extending radially from the flange; and a tensioning band associated with the flange. The tensioning band includes a first end proximate to the first end of the blade root cover segment and a second end proximate to the second end of the blade root cover segment. The first end and the second end of the tensioning band include connection means for connecting with and applying tension between a like blade root cover segment. A blade root cover and a method of assembling a blade root cover are also provided.

Abstract: An abnormality early-warning method for a fan includes: when a target fan is capable of normally dissipate heat, obtaining a target rotational speed, a target operating current, and a target ambient temperature of the target fan at a current moment; when the target rotational speed is less than a minimum rotational speed of the target fan, providing first early-warning information as a prompt; when the target rotational speed is greater than or equal to the minimum rotational speed of the target fan, predicting a rotational speed and an operating current of the target fan at a next moment based on a rotational speed change curve, a current change curve, the target rotational speed, the target operating current, and the target ambient temperature to obtain a predicted rotational speed and a predicted operating current; and when the predicted rotational speed is less than a first preset threshold or the predicted operating current is greater than a second preset threshold, providing second early-warning informa

Abstract: Provided are a wind turbine, and a control method, a controller and a control system for the same. The control method includes: monitoring wind resource data at the location of a wind turbine and operation data of the wind turbine; identifying a complicated wind condition based on the wind resource data and the operation data; determining an accumulative proportion of time periods in which the complicated wind condition occurs within a first predetermined time period; and controlling the wind turbine to perform a protection operation, in response to the accumulative proportion of the time periods exceeding a first preset threshold.

Abstract: A fish-friendly centrifugal pump having an impeller. The impeller includes a base that is concentric relative to a rotational axis of the impeller and an impeller body formed as at least one oblique cone having an eccentric apex and a smooth outer surface. The at least one oblique cone extends from the base.

Abstract: A submersible pump comprises a rotational assembly and a rotational assembly housing. The rotational assembly has a plurality of in-line flow inducing sections. A centerline longitudinal axis of each of the flow inducing sections extends colinearly with a rotational axis of the rotational assembly. A downstream end portion of a flow pressurizing section is engaged with an upstream end portion of a rotational flow amplification section. A downstream end portion of the rotational flow amplification section is engaged with an upstream end portion of a flow outlet section. The rotational assembly housing has an interior space extending along a centerline axis of the rotational assembly housing. The rotational assembly is disposed within the interior space of the rotational assembly housing. The rotational assembly and the rotational assembly are jointly configured for causing the rotational axis to extend colinearly with the centerline longitudinal axis of the rotational assembly housing.

Abstract: The rotor comprises a plurality of rotor segments arranged axially adjacent to one another. A tie rod extends through the rotor segments. Opposed first and second locking members arranged at the axial ends of the tie rod lock the rotor segments to one another and to the tie rod. At least one intermediate support member is arranged in an intermediate position between the two axial ends of the tie rod and between the tie rod and one of the rotor segments.

Abstract: A motor assembly that includes a motor having a motor casing, a rotatable shaft extending from said motor casing to a shaft length and a hub coupled to said rotatable shaft, the hub having a circumferential skid surface disposed immediately proximal to the motor casing and having a channel configured to seat a propeller, when a propeller is present, wherein a bending moment applied to the shaft through the hub results in the circumferential skid surface contacting said motor casing.

Abstract: A downhole gas separator fluid mover assembly comprising a fluid mover having an inlet and an outlet, a separation device, a separation chamber, and a flow path separator located downstream of the fluid mover. The fluid mover comprising a centrifugal pump stage with an impeller and a diffuser moves production fluid comprising a high viscosity fluid portion and a gas portion to the separation device. The separation device produces a fluid motion that separates the gas phase from the liquid phase in response to the flow rate of production fluid from the fluid mover. A portion of the high viscosity fluid passes through the gas phase discharge port in response to the over-supply of high viscosity fluid to the liquid discharge port in response to the flow rate of the production fluid through the fluid mover.

Abstract: An improved parallel flow pump is provided. The improved parallel flow pump includes clearance for tooling, nuts, and bolts, and further provides smoothed, contoured surfaces and one or more turning vanes to improve the top-to-bottom velocity distribution in the discharge manifold into which the pump flows.

Abstract: A multi-stage compressor assembly is disclosed. Each of the stages of the compressor assembly has rows of blades arranged to rotate in counter-opposite directions, and this is effective to produce relatively high specific work, and high flow-capacity in a compact footprint at moderate blade tip speeds. In one non-limiting application, the compressor assembly can be utilized to compress a gas having a low-molecular weight and density, such as hydrogen.

Abstract: An auxiliary shaft seal flushing system of a centrifugal pump and an axial flow pump, comprising a main running pump and a standby pump which are provided with a same shaft seal flushing system respectively, the shaft seal flushing system of the main running pump and that of the standby pump being connected in parallel to form a common shaft seal flushing system.