An optimization method for steady-state operation of natural gas pipelines considering the influence of air coolers

Abstract

The invention discloses a method for optimizing the steady-state operation of natural gas pipelines considering the influence of air coolers. The objective function is to minimize the sum of the energy consumption of the compressor unit and the energy consumption of the air cooler unit. In each compressor station, the energy consumption of the compressor unit is The sum of the energy consumption and the energy consumption of turning on the air cooler unit is the energy consumption of each station. Assuming that the total number of compressor stations is n, the total energy consumption of the entire long-distance pipeline is the sum of the energy consumption of each station. The present invention adds the energy consumption of the air cooler into the optimization model for the first time, and considers the coupling relationship between the air cooler, the compressor and the pipeline system, which is more in line with the actual situation on site. The performance constraints of the model greatly increase the difficulty of solving the model, and the optimization scheme obtained according to this model can greatly reduce the energy consumption of the compressor stations of the whole line.

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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