Energy saving measures of Shaanxi-Beijing Natural Gas Pipeline System

To reduce energy consumption of gas in logistics, Shannxi-Beijing Natural Gas Pipeline System is taken as a case to analyze the natural gas storage and transportation systems. In accordance with operating characteristics and energy consumption conditions of natural gas pipelines, compressor stations, distribution stations and gas storages as well as electric power and natural gas energy consumption in the production, bythe use of thermal equilibrium of energy flow, energy cascade utilization, thermodynamic exergy value and other analysis methods, energysaving measures are researched from different aspects. It is indicated that waste heat utilization, differential pressure power generation and gas storage transformation can be used for energy saving, and the feasibility of various energy-saving measures is analyzed. Exhaust temperature of gas compressor units in the natural gas pipeline network is higher, so the waste heat has a larger potential and value for recycling. Differential pressure, enthalpy and internal energy are calculated on the basis of differential pressure energy of pipeline network distribution stations and converted by the exergy analysis principle to indicate a higher energy use value. In accordance with relevant geological conditions, it is indicated that gas-fired unit exhaust, inert gas or CO2 can replace the natural gas as the bedding gas of the gas storage. This measure can reduce more than 50% of production energy consumption. The research results can provide a reference to thenatural gas logistics enterprises to improve production processes and reduce energy consumption.