ENERGY CONVERSION DEVICE

Abstract

The invention relates to an isothermal gas expansion and compression device (3), compressing said gas by consuming mechanical energy and releasing mechanical energy by expanding said gas. The device comprises at least two liquid pistons (4, 41, 42), movable within at least two chambers (31, 32), each containing a gas capable of being compressed or expanded by the movement of said liquid pistons. A mechanical actuator (1), comprising at least one solid piston, moves the liquid pistons within the chambers. Each chamber includes an insert (51, 52) through which said liquid (4) and said gas can flow, the insert having through-cells (53) extending in a direction parallel to the direction of movement of said liquid piston within said insert.The device includes at least one first phase separator connected to an outlet of each of the chambers, and to a pressurized gas storage tank(5).