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RISEnergy and exergy analysis of reciprocating natural gas expansion engine based on valve configurations
Natural gas pressure should be reduced in city gate stations before consuming. Part of the physical exergy of this high pressure gas is wasted if throttling valves are employed for pressure reduction. Reciprocating natural gas expansion engine...
A novel method for calculating natural gas density based on Joule Thomson coefficient
to simplify natural gas mass flow metering at natural gas pressure drop stations (CGS), this work presents an easy and precise method for measuring natural gas density. The method is based on a correlation that calculates the molecular weight and density...
Integration of vertical ground-coupled heat pump into a conventional natural gas pressure drop station: Energy, economic and CO2 emission assessment
City gate stations receive high pressure natural gas and decrease the pressure by throttle valves. Concurrent with the natural gas pressure reduction, the temperature also drops. Thus, to prevent blocking of the downstream pipeline by the liquid...
Performance assessment of vortex tube and vertical ground heat exchanger in reducing fuel consumption of conventional pressure drop stations
In natural gas pressure drop stations, before pressure dropping specially in cold seasons, the natural gas is preheated to prevent gas hydrate formation. Indirect water bath heaters employed for preheating. The heaters have low thermal efficiency...