Abstract: A pressure exchanger for hydraulic fracking includes a rotor that is configured to rotate about an axis and includes a plurality of rotor ducts extending parallel to the axis, where each rotor duct extends between a first side and a second side of the rotor that are spaced apart from each other. The pressure exchanger further includes a first end cover that is disposed at the first side of the rotor and defines a first pair of apertures configured to communicate a first fluid including fracking particles, and a second end cover that is disposed at the second side of the rotor and defines a second pair of apertures configured to communicate a second fluid. The first end cover further defines a flush port configured to supply the second fluid into the first side of the rotor in a state in which the first pair of apertures communicate the first fluid with the first side of the rotor.

Abstract: A pressure exchanger for hydraulic fracking includes a rotor that is configured to rotate about an axis and includes a plurality of rotor ducts extending parallel to the axis, where each rotor duct extends between a first side and a second side of the rotor that are spaced apart from each other. The pressure exchanger further includes a first end cover that is disposed at the first side of the rotor and defines a first pair of apertures configured to communicate a first fluid including fracking particles, and a second end cover that is disposed at the second side of the rotor and defines a second pair of apertures configured to communicate a second fluid. The first end cover further defines a flush port configured to supply the second fluid into the first side of the rotor in a state in which the first pair of apertures communicate the first fluid with the first side of the rotor.

Abstract: A pressure exchanger includes a rotor including rotor ducts that extend parallel to each other. The pressure exchanger further includes a flow divider that has a substantially flat shape and is located in the rotor ducts, where the flow divider partitions an inner space of one of the rotor ducts into flow paths configured to communicate fluid. The flow divider defines an aspect ratio of each of the plurality of flow paths, where the aspect ratio is a ratio of a width of one of the flow paths in a radial direction with respect to an axial length of one of the flow paths in the axial direction.

Abstract: A pressure exchanger includes a rotor including rotor ducts extending parallel to an axis, a first end cover disposed at a first side of the rotor, and a second end cover disposed at a second side of the rotor. The rotor is configured to rotate about the axis, communicate first fluid and second fluid through the rotor ducts, control pressure of the first fluid or the second fluid discharging from the rotor, and allow a least a portion of the first fluid to contact the second end cover to thereby reduce or eliminate a dead volume inside of the rotor. The second fluid includes a flush volume that passes through the rotor ducts.

Abstract: A rotor positioning system for rotary pressure exchangers with a rotor with a central bore accommodating an axle affixed to end covers in each end having at least one pair of high and low pressure ports in communication with opposing end cover ports through coaxial rotor ducts.

Abstract: A split pressure vessel for processing of two flows encountered with energy exchange devices, consisting of two opposite facing end caps 1,2 having each a side port for low pressure 3,5 and one axial port 4,6 preferably in the same plane as the side ports. Each end cap has internal structurally integrated manifolds for high pressure 17,22 and low pressure manifold 19,24 connecting to axial ports of the internal energy exchange device. The high pressure side of one end cap may be structurally integrated with a circulation pump or booster 26 having a submersible or external motor.

Abstract: A split pressure vessel for processing of two flows encountered with energy exchange devices, consisting of two opposite facing end caps 1,2 having each a side port for low pressure 3,5 and one axial port 4,6 preferably in the same plane as the side ports. Each end cap has internal structurally integrated manifolds for high pressure 17,22 and low pressure manifold 19,24 connecting to axial ports of the internal energy exchange device. The high pressure side of one end cap may be structurally integrated with a circulation pump or booster 26 having a submersible or external motor.

Abstract: A split pressure vessel for processing of two flows encountered with energy exchange devices, consisting of two opposite facing end caps 1, 2 having each a side port for low pressure 3, 5 and one axial port 4, 6 preferably in the same plane as the side ports. Each end cap has internal structurally integrated manifolds for high pressure 17, 22 and low pressure manifold 19, 24 connect-circulation pump or booster 26 having a submersible or external motor.

Abstract: A pressure exchanger for transferring pressure energy from one third flow to a second where two end covers (13, 14), a rotor (11) and a rotor liner (12) are mounted together via a centre bolt (10) in a pressure housing (1) in order to reduce elastic deformation, essentially tensile stress, and to protect the pressure exchanger against impact or shock. One end cover (13) is arranged for inlet of fluid at high pressure and outlet of the same fluid depressurized in a corresponding end cover (14) via a central course in the rotor. The second end cover (14) has in addition an inlet for fluid at low pressure and an outlet for the same fluid under high pressure. A base (2) which is attached with lease pins at the bottom of the pressure housing (1) has external connections (3, 4) and internal passages, which are connect with the inlet (24) of fluid at low pressure together with the outlet (23) for depressurized fluid in the and cover (14).

Abstract: A pressure exchanger for simultaneously reducing the pressure of a high pressure liquid and pressurizing a low pressure liquid. The pressure exchanger has a housing having a body portion; with end elements at opposite ends of the body portion. A rotor is in the body portion of the housing and in substantially sealing contact with the end plates. The rotor has at least one channel extending substantially longitudinally from one end of the rotor to the opposite end of the rotor with an opening at each end. The channels of the rotor are positioned in the rotor for alternate hydraulic communication with 1) high pressure liquid and 2) low pressure liquid, in order to transfer pressure between the high pressure liquid and the low pressure liquid. Because of the high pressures and the high angular velocities, this is a highly cavitation prone structure, In order to prevent cavitation, there are one or more grooves in one or both of the end plates.

Abstract: A pressure exchanger for simultaneously reducing the pressure of a high pressure liquid and pressurizing a low pressure liquid. The pressure exchanger has a housing having a body portion; with end elements at opposite ends of the body portion. A rotor is in the body portion of the housing and in substantially sealing contact with the end plates. The rotor has at least one channel extending substantially longitudinally from one end of the rotor to the opposite end of the rotor with an opening at each end. The channels of the rotor are positioned in the rotor for alternate hydraulic communication with 1) high pressure liquid and 2) low pressure liquid, in order to transfer pressure between the high pressure liquid and the low pressure liquid. Because of the high pressures and the high angular velocities, this is a highly cavitation prone structure, In order to prevent cavitation, there are one or more grooves in one or both of the end plates.

Abstract: A pressure exchanger for transfer of pressure energy from one fluid flow to another with direct mounting of a rotor in a housing. The rotor has a central supply manifold for lubricating fluid and step-shaped bearing surfaces with reduced gap clearance towards each rotor end. The lubricating medium flows towards a manifold at each end and from there to the low pressure side via the axial gap clearance. During axial movement of the rotor the manifold pressure increases when the gap clearance decreases at one end while the opposite occurs at the other end, resulting in an axially centering force in the gap surfaces. In the same way steps in the radial bearing surfaces generate a centering force, since a radial movement will cause an increased pressure gradient when there is a reduction of the gap clearance and a decreased pressure gradient when there is an increase in the gap clearance. The end pieces also have a curved countersink at each low pressure port which increases the drainage from the manifold.

Abstract: A pressure exchanger for transfer of pressure energy from one fluid flow to another in a housing having inlet and outlet ducts for each fluid flow and a rotor adapted to rotate about its longitudinal axis within the housing. The rotor is formed with a plurality of rotor ducts arranged around the axis of rotation, the rotor ducts extending from one end of the rotor to the other and having openings at the ends which alternately connect the inlet and outlet ducts of the respective fluids to one another during rotation of the rotor. The rotor is frusto-conical in shape and the openings at the larger diameter end of the rotor are spaced from the axis of rotation at a distance which is substantially greater than the radial spacing of the openings at the smaller end of the rotor. The openings at the smaller end of the rotor are located in proximity to the axis of rotation of the rotor and the openings at the larger end of the rotor are disposed in a narrow annular region in proximity to the periphery of the rotor.

Abstract: A pressure exchanger for transfer of pressure energy from a liquid flow of one liquid system to a liquid flow of another liquid system includes a housing (1) with inlet and outlet ducts forming pairs of ducts for each liquid flow. A cylindrical rotor (8) is rotably arranged in the housing (1), the rotor having a number of axial bores adapted to sequential connection with the passages and thus alternately carry liquid of high pressure of the respective systems. According to the invention the duct openings facing the rotor (8) are found approximately as a segment with a control angle of 180.degree. and a partition wall is formed between these openings. These large openings permit fast liquid flows which fluctuate only to a slight extent.