A hydraulic fracturing system for fracturing a subterranean formation is disclosed. In an embodiment, the system can include a plurality of electric pumps fluidly connected to a well associated with the subterranean formation and powered by at least one electric motor, and configured to pump fluid into a wellbore associated with the well at a high pressure; at least one generator electrically coupled to the plurality of electric pumps so as to generate electricity for use by the plurality of electric pumps; a gas compression system fluidly coupled to the at least one generator so as to provide fuel for use by the at least one generator; and a combustible fuel vaporization system gaseously coupled to the gas compression system so as to provide at least one of vaporized fuel or gasified fuel, or a combination thereof, to the gas compression system.

A system for cooling a storage area of a vehicle includes one or more eutectic plates (102) for cooling the storage area (101); a refrigeration system (103) configured to cool the one or more eutectic plates (102); an electrical system (106) configured to receive electrical power from a mains power supply and supply electrical power to the refrigeration system (103); a variable displacement hydraulic pump (113) having an input shaft for being driven by an engine (112) of the vehicle (100); and a generator (107) configured to receive hydraulic fluid from the hydraulic pump (113), generate electrical power in response thereto and supply the electrical power to the refrigeration system (103); the hydraulic pump (113) is configured to reduce the volume of hydraulic fluid that it supplies to the generator (107) for each rotation of the input shaft, as the rotational speed of the input shaft increases.

A high density mobile power unit may include an elongated unibody frame having a frame cavity, a front end, a rear end, an elongated roof panel, a front panel, a rear panel, an elongated floor assembly having an upper side and a lower side, an elongated first side panel, and an elongated second side panel. A frame cavity bounded by the roof panel, front panel, rear panel, the upper side of the floor assembly, first side panel, and second side panel. A plurality of wheel and tire assemblies may be coupled to the unibody frame and may support the unibody frame above a ground surface. A radiator may be coupled to the upper side of the floor assembly and positioned within the frame cavity at the front end. At least one generator may be positioned within the frame cavity at the rear end. An engine may be positioned within the frame cavity between the at least one generator and the radiator. An under carriage structural lattice arrangement may be coupled to the lower side of the floor assembly.

A portable power pack is carried on a back frame and harness. The power pack is battery-operated or gasoline-operated capable of generating up to two thousand two hundred Watts (2200 W) of 110-VAC power. A removable shroud can also be selectively attachable to the frame if so desired.

Devices, systems, and methods to air cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

Systems are disclosed for power systems and enclosures having an improved compressor drive. In examples, a power system includes a generator to be driven by an engine. The generator is coupled to the engine on a first side of the generator and has a clutch extending from a second side of the generator opposite the engine. The clutch is coupled to the engine. A compressor is positioned at the second side of the generator opposite from the engine. The compressor comprising a shaft extending toward the generator and configured to be driven by the clutch.

Systems and apparatuses include an alternator including a stator and a rotor structured to be coupled to a crankshaft of a prime mover, and processing circuits structured to: determine a crankshaft position, associate a crankshaft timestamp with the crankshaft position, determine a stator voltage waveform position, associate a stator voltage waveform timestamp with the stator voltage waveform position, determine a common time base using the crankshaft timestamp and the stator voltage waveform timestamp, determine a rotor position based on the crankshaft position and associated with the common time base, determine a load angle based on the rotor position and the stator voltage waveform position using the common time base, compare the load angle to a stability limit, and transmit a predicted pole slip signal to at least one of the prime mover or the alternator to inhibit a pole slip event when the load angle exceeds the stability limit.

The portable generator is a portable electricity provisioning system that is adapted for use in generating electricity. The portable electricity provisioning system is mounted on a wheeled structure that allows the portable generator to be readily transported to locations where electricity is otherwise not available or is not adequate for the intended use. The portable generator is configured to provide electricity at 120 Vac, 12 Vdc and 5 Vdc and further comprises adequate energy reserves and connections to provide 625 amps at 12 Vdc for use in starting vehicles in maintenance situations. The portable generator comprises an inverter, a jump starting system, a plurality of ports, and a dolly.

A mobile ground power unit includes a housing in which an engine and an electric generator are disposed. The housing features a canopy having an outer wall facing outside. The outer wall has a single piece covering an upper side of the engine and extending downwards along at least two different vertical sides of the ground power unit. The canopy has an inner wall facing inside. The inner wall features a horizontal area covering the upper side of the engine and is extending from the horizontal area downwards along the at least two different vertical sides. The inner wall and the outer wall define a hollow space between each other. The canopy has an integrated ducting system with an inlet opening within the outer wall of the canopy, whereby the hollow space constitutes an air channel for exchanging fluid between the inside and the outside of the housing.

A mobile ground power unit has a housing in which an engine and an electric generator are disposed. The housing features at least one rotor molded or rotor cast component the housing features at least one rotor molded or rotor cast component that serves as an outer shell or part of the outer shell of the housing, whereby the housing features as the at least one rotor molded or rotor cast component one of a canopy covering at least the upper side of the engine and/or the generator a cable tray arranged sideways in relation to the engine and/or the electric generator.