Natural gas pipeline steady-state operation optimization method considering influence of air cooler

Abstract

The invention discloses a natural gas pipeline steady-state operation optimization method considering the influence of an air cooler. The minimum sum of the energy consumption of a compressor unit andthe energy consumption of an air cooler unit is taken as an objective function. The sum of the energy consumption of the compressor unit and the energy consumption of starting the air cooler unit ineach air compression station is taken as the energy consumption of each station. The total number of the air compression stations is set to be n, and the total energy consumption of the whole long-distance pipeline is the sum of the energy consumption of each station. According to the method, the energy consumption of the air cooler is added into the optimization model for the first time. The coupling relation among the air cooler. The compressor and the pipeline system is considered. The method is more suitable for on-site practice. Meanwhile, the number of started air coolers is increased toserve as an optimization variable. The performance constraint of the air coolers is increased. The model solving difficulty is greatly increased. The optimization scheme obtained according to the model can greatly reduce the energy consumption of the whole line compressor station.

Description

technical field [0001] The invention belongs to the field of steady-state operation optimization of long-distance natural gas pipelines, especially considering the influence of air coolers on the entire pipeline system, thereby establishing a joint operation optimization model including air coolers and compressors, and adopting a heuristic search algorithm to solve the problem, specifically involving a consideration Optimization method for steady-state operation of natural gas pipelines affected by air coolers. Background technique [0002] In long-distance natural gas pipelines, the temperature of the natural gas after being pressurized by the compressor unit increases, resulting in an increase in the transmission friction of the natural gas pipeline, which further increases the energy consumption of the compressor unit for pressurization. Therefore, it is necessary to add cooling equipment to the natural gas at the outlet of the compressor , to reduce the outlet temperatur...

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Problems solved by technology

[0003] At present, there are very few researches on the optimal operation of air coolers in long-distance pipelines at home and abroad. In 2015, Xie Ping compared the energy consumption of the compressor stations by determining the exit temperature of the compressor station and comparing the start-up plans of the air coolers of the three compressor stations. For long-distance natural gas In terms of pipelines, the number of compressor stations is large and the pipeline mileage is long, so it is impossible to draw conclusions only through scheme comparison

However, there are very few foreign studies on the optimal operation of air coolers in compressor stations of long-distance natural gas pipelines.

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