Steady-state optimization operation of the west–east gas pipeline

Abstract

A pipeline operation optimization model with minimum energy consumption as the objective function was established based on the dynamic programming method. The model was applied to a 3840 km gas pipeline whose designed pipeline capacity was 170 3 10 8 t/a. There were 40 stations in the line, including 22 compressor stations and 32 compressors. The solution time was controlled within 60 s to show that the algorithm was fast and effective. The number of startingup compressors in the optimized scheme is two more than that in the actual operation scheme, and the total pressure drop of the pipeline decreased by 3.40 MPa, the average efficiency of the gas turbine units increased by 4.234%, the average efficiency of the electric drive units increased by 4.875%, and the power decreased by 18,720.38 kW, confirming the validity and feasibility of the optimization model.

Numerical simulation and simplified calculation method for heat exchange performance of dry air cooler in natural gas pipeline compressor station

“…According to the heat transfer calculation process of the dry air cooler shown in Figure 2, the calculation formulas [28][29][30] of each variable are listed in Equations (1)(2)(3)(4)(5)(6)(7).…”

“…1,2 The temperature of natural gas increases after being pressurized by the compressor unit, which causes the frictional resistance of the natural gas pipeline to increase, 3 and the operating noise increases, 4 further enhancing the booster compressor unit energy consumption, so the air cooler is often arranged at the compressor outlet of the compressor station to reduce the natural gas temperature at the compressor outlet. 5 An on-site image of an air cooler is shown in Figure 1A. The air cooler is arranged in parallel with multiple units to share the gas output of the compressor unit at the same time.…”

Analysis of the water‐filling process for crude oil pipelines with a large drop in height

“…Crude oil pipeline with long distance and large drop in height generally adopts the operation mode of filling water first and then jacking water by crude oil for part of the pipeline, and water resources can be greatly saved by adopting partial pipeline filling . The water‐filling process can flush and clean the pipeline to ensure that the quality of oil in the pipeline will not be affected and is used to test the pressure of the large‐drop pipe to ensure the safe delivery of oil; additionally, we can use the water column to establish back pressure to prevent oil vaporization.…”

Flow field and noise characteristics of manifold in natural gas transportation station

“…Tan and Wang analyzed the velocity field in downstream gas pipe of manifold and obtained the reasonable velocity field distribution [19]. Liu et al did several aggressive studies on aerodynamic noise, which included the analysis of the factors influence the noise of upright venting pipes, elbows and manifolds [20][21][22][23].…”