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A transient flow model for heated oil transportation pipeline is built with application of continuity, momentum and energy conservation equations of pipe flow. The transient friction term of the model incorporates both of the steady and unsteady friction and the Brunone-Vitkovsky model is selected to compute unsteady flow friction in pipeline. The method of characteristic, finite-difference scheme...
Oil pipeline could be clogged by congealed oil products, due to low temperature. Thus, the distinct pressure difference around the plugged pipe section can be used to detect pipeline clogging, and the decompression wave of water hammer is put forward to identify plugged position of oil pipeline. The detailed theory is given below: when the pipeline is completely plugged, increase the pressure of pipeline,...
In view of the characteristics of coal bed methane, equation of state BWRS is used to calculate the thermodynamic parameters. Then based on continuity equation, momentum equation, characteristic equations of non-pipe elements and flow quantity balance equation, the simulation mathematic model of coal bed methane transmission pipeline is built. Considering the slow transient characteristic of gas flowing,...
During the operation process of heated oil transportation pipelines, shutdown accidents may be caused by some faults. In view of hydraulic and thermodynamic characteristics, the transient simulation model of heated oil pipelines is established based on hydrodynamic theories. The model is composed of quasilinear hyperbolic partial differential equations. Integration with the boundary conditions that...
A variety of processes are utilized for gas transmission. It is important to optimize the operation conditions of these processes to promote efficiency. The operation efficiency of pipeline systems is combined with the purchase and sale prices of gas, the quantity bought and sold of gas and the management costs. Aimed at the maximum operation efficiency, an operation optimization model of gas pipelines...
In view of the hydraulic transient problem in heated liquid pipeline with entrapped gas, water hammer analysis equations are built. The solve methods are discussed based on homogeneous flow model and fractional flow model. Then VC++ is utilized to develop a computer program to simulate the hydraulic transient behavior. Ultimately, this paper simulates the hydraulic transient behavior on the conditions...
With thorough work on reduction technology of carbon dioxide emission, CO2 capture and storage is gradually paid great attention by international scholars. Transport is an integral part of this capture and storage technology. It has been estimated that for large-scale and long-distance transport of CO2, pipelines are the most economical way. In consideration of CO2's special physical properties, its...
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