Energy-Saving Multistage Filling of Adsorption Natural Gas Storage System

Abstract

A theoretical analysis of multistage (cascade) method of filling adsorption methane storage systems is made from the energy saving standpoint. It is demonstrated that multistage filling saves energy for gas compression substantially. The beneficial effect is much less if the compressed gas is filled in a cylinder without an adsorbent. The influence of the number of filling stages and the theoretical maximum of idealized filling with gradual elevation of compressor delivery pressure as the limiting case of multistage filling with an infinite number of stages are shown. The rated minimum energy consumption is 12% of the energy consumed for filling compressed gas in a system containing no adsorbent.