Abstract
Maintaining the gas temperature and the formation of gas hydrates is one of the main problems in the operation of gas pipelines. Development and implementation of new effective methods for heating the gas during gas reduction will reduce the cost of gas transportation, solve the problem of resource and energy saving in the fuel industry. Study is aimed at increasing the energy efficiency of the natural gas reduction process by using a resonant gas heater to maintain the set temperature at the outlet of the gas distribution station (GDS) and prevent possible hydrate formation and icing of the station equipment. Paper considers the implementation of fireless heating of natural gas and fuel gas savings of heaters due to the introduction of a thermoacoustic reducer, operating on the basis of the Hartmann – Sprenger resonance effect, into the scheme of the reduction unit. By analyzing the existing methods of energy separation and numerical modeling, the effectiveness of the resonant-type energy separation device is substantiated. Modification of the reduction unit by introducing energy separating devices into it will allow general or partial heating of natural gas by its own pressure energy. Developed technology will allow partial (in the future, complete) replacement of heat energy generation at a gas distribution station by burning natural gas.
Highlights
Nowadays, Russia has developed and implemented programs to improve the application efficiency of the fuel and energy resources (FER) and resource saving, including reduction of natural gas losses [21, 22, 33].Long gas transportation distances cause high pumping pressure, which must be lowered before shipment to the consumer
Lowering of the pressure occurs at the reduction points by spending the energy of natural gas flow to overcome the local resistance, represented by the throttle part of the pressure regulator [32]
Device consists of a supersonic nozzle, a resonator coaxially located with it and a pressure regulator connected in parallel to compensate for daily and seasonal irregularities in gas flow rate
Summary
Long gas transportation distances cause high pumping pressure, which must be lowered before shipment to the consumer. Lowering of the pressure occurs at the reduction points by spending the energy of natural gas flow to overcome the local resistance, represented by the throttle part of the pressure regulator [32]. Natural gas transport and distribution networks are extensive and branched systems with many points for gas pressure reduction (PRG), protection of gas pipelines from corrosion and electrochemical protection units (EPU). The main purpose of the PRG is to lower the high pressure (at which gas is transported over long distances) to the level required by consumers, and maintain it at this level. Energy can be efficiently converted into other types of energy: electrical energy for the needs of the gas distribution station itself and/or heat energy for leveling gas cooling during throttling
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