文章基本信息

标题：Study on Heat Transfer Performance of Medium in Aerial Hot Oil Pipe for Shutdown
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作者：Liu Xiaoyan ; Li Xiaoqing ; Xu Ying 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2014
卷号：2014
DOI：10.1155/2014/571676
出版社：Sage Publications Ltd.
摘要：For hot oil pipeline, heat transfer of the medium of pipe in the process of shutdown is a heat and mass transfer problem of moving phase interface with wax appearance latent heat. The treatment of natural convection in pipe is the key to simulating accurately temperature field and define freezing interface. This paper has adopted partition allocation method to establish shutdown temperature drop mode of aerial hot oil pipe by Fluent software. Typical operating conditions of the system have been simulated. According to the flow velocity transformation of liquid oil, the process of natural convection has been analyzed. The results showed that the influence of natural convection can be ignored due to the second half of the crude oil solidification process. Freezing cloud charts in different times were simulated, and during the shutdown process, the temperature fluctuation in the vertical direction of pipe center and the position of maximum temperature in pipe have been defined. The aim of this paper is to offer theoretical base for shutdown time.