An exchanger includes a seal; a first channel with an inlet and an outlet; a second channel alongside the first channel and isolated from the first channel by the seal, the second channel including an inlet and an outlet; and a transfer turbine including a first portion with one or more blades located within the first channel, a second portion with one or more blades located within the second channel, and a shaft connecting the first portion and the second portion such that rotation of the first portion is synchronized with rotation of the second portion, the shaft extending through the seal. Related apparatus, systems, techniques, and articles are also described.

An exchanger includes a seal; a first channel with an inlet and an outlet; a second channel alongside the first channel and isolated from the first channel by the seal, the second channel including an inlet and an outlet; and a transfer turbine including a first portion with one or more blades located within the first channel, a second portion with one or more blades located within the second channel, and a shaft connecting the first portion and the second portion such that rotation of the first portion is synchronized with rotation of the second portion, the shaft extending through the seal. Related apparatus, systems, techniques, and articles are also described.

A pumping system for pumping a medium is described. The system comprises: at least one transverse pressure exchange chamber, but preferably multiple pressure exchange chambers. Each pressure exchange chamber has a valve arrangement at each end. The system also includes a pressurised discharge at a delivery end of the system and a filling mechanism operable to fill the pressure exchange chamber with the medium. A positive displacement pump is operable to pump a driving fluid in direct contact with the medium so that the medium is pumped from the pressure exchange chamber to the pressurised discharge. A method of pumping a medium is also described.

A pumping system for pumping a medium is described. The system comprises: at least one transverse pressure exchange chamber, but preferably multiple pressure exchange chambers. Each pressure exchange chamber has a valve arrangement at each end. The system also includes a pressurised discharge at a delivery end of the system and a filling mechanism operable to fill the pressure exchange chamber with the medium. A positive displacement pump is operable to pump a driving fluid in direct contact with the medium so that the medium is pumped from the pressure exchange chamber to the pressurised discharge. A method of pumping a medium is also described.

Gas expansion device for expanding a gas or a gas-liquid mixture, where the gas expansion device includes a gas expansion element with an inlet port for the gas to be expanded and an inlet pipe for the gas to be expanded. The inlet pipe is connected to the inlet port where the gas expansion device includes a first liquid injection point for the injection of liquid, where the first liquid injection point is at a position level with the inlet port or upstream from the inlet port.

Gas expansion device for expanding a gas or a gas-liquid mixture, where the gas expansion device includes a gas expansion element with an inlet port for the gas to be expanded and an inlet pipe for the gas to be expanded. The inlet pipe is connected to the inlet port where the gas expansion device includes a first liquid injection point for the injection of liquid, where the first liquid injection point is at a position level with the inlet port or upstream from the inlet port.

A system includes a hydraulic energy transfer system configured to exchange pressures between a first fluid and a second fluid, wherein pressure of the first fluid is greater than pressure of the second fluid. The system also includes a lubrication system coupled to the hydraulic energy transfer system and configured to pump or direct a lubrication fluid into the hydraulic energy transfer system.

A system includes a hydraulic energy transfer system configured to exchange pressures between a first fluid and a second fluid, wherein pressure of the first fluid is greater than pressure of the second fluid. The system also includes a lubrication system coupled to the hydraulic energy transfer system and configured to pump or direct a lubrication fluid into the hydraulic energy transfer system.

A rotary liquid piston compressor and a power generation system including a first fluid loop. The first fluid loop includes a pump that circulates a liquid. A second fluid loop that generates power by circulating a supercritical fluid. The second fluid loop includes a turbine that rotates and powers a generator as the supercritical fluid flows through the turbine. A rotary liquid piston compressor fluidly coupled to the first fluid loop and the second fluid loop. The rotary liquid piston compressor exchanges pressure between the liquid circulating in the first fluid loop and the supercritical fluid circulating in the second fluid loop.

A rotary liquid piston compressor and a power generation system including a first fluid loop. The first fluid loop includes a pump that circulates a liquid. A second fluid loop that generates power by circulating a supercritical fluid. The second fluid loop includes a turbine that rotates and powers a generator as the supercritical fluid flows through the turbine. A rotary liquid piston compressor fluidly coupled to the first fluid loop and the second fluid loop. The rotary liquid piston compressor exchanges pressure between the liquid circulating in the first fluid loop and the supercritical fluid circulating in the second fluid loop.