A SYSTEM FOR REDUCING PRESSURE FLOW

摘要

A system for reducing pressure in a gas flow for a gas let-down system comprising: an expander driven by a first gas input; a heat exchanger, wherein an output of the expander is input to the heat exchanger; and a compressor driven by a second gas input; wherein a portion of the heat exchanger output is combined with gas having passed through said compressor, to form an outlet flow; such that the pressure in the outlet flow being lower than the pressure of the first gas input.