Some theoretical aspects on expansion of natural gas

摘要

The use of expansion machines for the production of electrical energy in order to reduce gas pressure in gas supply networks has proved in practice to be both technically feasible and economically justifiable. In order to obtain better data on thermodynamic processes involving natural gas, h-s diagrams were made for different compositions of natrual gas and thermodynamic processes were compared at different pressure levels. An example of the use of an expansion machine in the Ljubljana (Slovenia) gas supply network was analysed in greater detail from the technical and economic standpoints.