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Pipeline Heating Method Based on Optimal Control and State Estimation

机译：基于最优控制和状态估计的管道加热方法

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摘要

In the production of oil and gas in deep waters, the flow of the produced hydrocarbon through pipelines is a challenging problem. High hydrostatic pressures and low seabed temperatures may result in the formation of solid deposits, which in critical operating conditions like unplanned shutdowns can cause pipeline blockages. One of the possible methods for flow assurance, which can be jointly used with other approaches, is to heat the pipeline. This design concept aims at heating the produced fluid, if needed, to above a safe reference temperature in order to avoid the formation of solid deposits. The objective of this article is to utilize the particle filter method for the solution of a state estimation problem, in which the state variables are considered as the transient temperatures within a pipeline cross section. In addition, the minimum temperature in the region, predicted with the particle filter method, is used in the optimal control theory as a design tool for a typical heating system, during simulated shutdown conditions. An application example is presented to illustrate the control of the minimum temperature in the region, from an observer based on the particle filter method, where temperature measurements are assumed to be available on the external surface of the pipeline.
机译：在深水中生产石油和天然气时，所产生的烃类通过管道的流动是一个具有挑战性的问题。较高的静水压力和较低的海床温度可能导致形成固体沉积物，这在关键的运行条件下，例如计划外的停工可能会导致管道堵塞。可以与其他方法结合使用的流量保证方法之一是加热管道。该设计思想旨在在必要时将产出液加热到安全参考温度以上，以避免形成固体沉积物。本文的目的是利用粒子滤波方法解决状态估计问题，其中状态变量被视为管道横截面内的瞬态温度。此外，在最佳的控制理论中，使用颗粒过滤器方法预测的该区域的最低温度将用作模拟停机条件下典型加热系统的设计工具。提出了一个应用示例，以说明基于颗粒过滤器方法的观察者对该区域最低温度的控制，其中假定在管道的外表面上可以进行温度测量。

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  • 来源
    《Heat Transfer Engineering》 |2013年第6期|511-519|共9页
  • 作者

    FLAVIO L. V. VIANNA; HELCIO R. B. ORLANDE; GEORGE S. DULIKRAVICH;

  • 作者单位

    Address correspondence to Dr. Flavio L. V. Vianna, Department of Sub-sea Technology, Petrobras' Research and Development Center (CENPES), Av. Horatio Macedo, 950, Cidade Universitaria, Ilha do Fundao, Rio de Janeiro, 21941-915, RJ, Brazil;

    Department of Mechanical Engineering, Politecnica/COPPE, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil;

    Department of Mechanical and Materials Engineering, Florida International University, Miami, Florida, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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