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Non isothermal Long Pipelines Leak Detection and Location

TANG\ Xiujia (Mechanics and Engineering Science Department, Peking University, 100871)  
In this paper the heat exchange between the pipelines carrying higher temperature fluid and ambient environment is analyzed. We have proposed a new complex thermal and hydraulic models, in which the flow regime, viscosity temperature characteristics, density temperature characteristics and specific heat temperature characteristics,etc., of the running fluid in the pipelines are considered. The work heat exchange of the frictional force is taken into account as well. For early detection and accurate location of leaks on the non isothermal pipelines in accordance to pressure, flow rate and temperature, etc., SCADA(Supervisory Control and Data Acquisition) measurements, at both inlet and outlet, the hydraulic and thermal differential equation system are driven, and the quick algorithms for solving them are also discussed. Because almost all the crude oil produced in China are highly waxy, highly viscous and with a high solidifying point, a series of experiments for leak and rupture detection are carried out on the long heating crude oil transport pipelines, verifying that the suggested method is both accurate and efficient.
【Fund】: 国家博士后科学基金
【CateGory Index】: TE832.9
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