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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

NUMERICAL SIMULATION OF HEAT TRANSFER AND OIL MIXING PROCESS IN HILLY PRODUCTS PIPELINE UNDER SHUTDOWN CONDITION

Get access (open in a dialog) DOI: 10.1615/IHTC16.mtr.024191
pages 5893-5900

Аннотация

A great number of products pipeline has been constructed as the demand of fossil energy are increasing rapidly. Products pipelines are usually shutdown by the failure of equipment or requirement of operation, which is inevitable during the running process. This may greatly increase the volume of mixed oil when the interface is in the hilly part of the pipeline and especially at the same time the oil with greater density is above. There exists heat transfer between the fluid in the pipeline and ambient environment during the shutdown. Meanwhile, the pressure inside the pipeline is decreasing along with the change of temperature. Hence, the essence of mixed oil in hilly products pipeline under shutdown condition is a complicated mass transfer process coupled with heat transfer, pressure and gravity effect. The motivation is to study the complicated mechanism of oil mixing in hilly products pipeline under shutdown condition. A mathematic model of the development of mixed oil under shutdown condition is proposed in the paper based on the convection-diffusion theory. Also the heat transfer between the oil and the soil is considered. The conclusion shows the change of parameters along with time including the temperature field, the velocity field and the concentration distribution inside the pipeline. The calculated temperature and concentration distribution can be used to guide batch interface tracking in hilly products pipeline during pipeline shutdown.