Research on Deep-Sea Pipeline Tube Bundle Heating System
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ORIGINAL ARTICLE
Research on Deep‑Sea Pipeline Tube Bundle Heating System Li Ding1 · Xinghua Ding2 · Weina Ren3 · Yingying Mu2 · Aiguo Lin2 Received: 7 May 2019 / Revised: 7 May 2019 / Accepted: 10 August 2020 © The Korean Institute of Electrical Engineers 2020
Abstract In order to ensure the safety of deep-sea submarine pipelines, this paper focuses on the analysis of the axial temperature distribution model of the submarine pipeline and the distribution parameter circuit model of the tube bundle heating system. Combined with these two models, theoretical analysis shows that the heating effect of the tube bundle heating system depends on the distributed circuit parameters and power frequency of the system. In order to improve the heat tracing efficiency, the power frequency needs to be adjusted according to the change of the load temperature, so the power supply frequency of the tube bundle heating system based on the Hammerstein model is optimized. Using a neuro-fuzzy algorithm, not only the theoretical values of heating power and power frequency are obtained, but also the drawbacks of determining the above parameters based on engineering experiments are avoided. Moreover, the pipeline heating is efficient and stable, the dynamic response is fast, and the working condition is also well adapted. Keywords Subsea flow line · Tube bundle · Temperature distribution model · Distributing parameter circuit model · Neurofuzzy control
1 Introduction In order to prevent crude oil from solidifying and waxing in submarine pipelines, active heating of submarine pipelines, reducing heat loss of pipelines and reducing temperature drop along the way have become the key to efficient and safe transportation of offshore crude oil pipelines. The active heating * Aiguo Lin [email protected] Li Ding [email protected] Xinghua Ding [email protected] Weina Ren [email protected] Yingying Mu [email protected] 1
School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
2
Academy of Science and Technology, China University of Petroleum, No. 739 , Beiyi Road, Dongying District, Dongying 257061, China
3
Department of Electrical and Automation, Shandong Labor Vocational and Technical College, Jinan 250022, China
technology of deep water subsea flowline broadly includes heat medium circulation heating and electric heating technology, and electric heating technology includes direct heating technology and electric tracing technology, and electric tracing technology can further divided into pipe in pipe heating and tube bundle heating [1]. At present, the pipe in pipe heating technology is widely used in foreign countries, the ISLAY project in 2012 is the first subsea flowline designed for oil–gas field development using the ETH-PIP technology in the world [2], but there are few successful cases in China. Skin pipe will be widely used in tubing bundle system with deep water electric trace heating technology [3], and can constitute a set of tube bundle heating system with the charact
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