Recovery of Wasted Mechanical Energy from the Reduction of Natural Gas Pressure

At the present time in Romania, the transition from the natural gas transportation system to the distribution system is done only thru the use of pressure reducing stations. Here the pressure drop is usually done by using throttle valves or pressure reducing valves, where the gas energy is spent without doing any work. In this article we propose the use of turbo-expanders in the pressure reducing stations, where the natural gas pressure from the...