Numerical Simulation for Preheating New Submarine Hot Oil Pipelines
For new submarine hot oil pipelines, accurate simulation of preheating is difficult owing to complex transient flow and coupled heat transfer happening. Using quasi-steady equations to simulate preheating is inadequate as the hydraulic transient phenomenon is neglected. Considering this fact, this p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/18/3518 |
| _version_ | 1798035137088192512 |
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| author | Yong Wang Nan Wei Dejun Wan Shouxi Wang Zongming Yuan |
| author_facet | Yong Wang Nan Wei Dejun Wan Shouxi Wang Zongming Yuan |
| author_sort | Yong Wang |
| collection | DOAJ |
| description | For new submarine hot oil pipelines, accurate simulation of preheating is difficult owing to complex transient flow and coupled heat transfer happening. Using quasi-steady equations to simulate preheating is inadequate as the hydraulic transient phenomenon is neglected. Considering this fact, this paper constructs an unsteady flow and heat transfer coupled mathematical model for the preheating process. By combining the double method of characteristics (DMOC) and finite element method (FEM), a numerical methodology is proposed, namely, DMOC-FEM. Its accuracy is validated by field data collected from the Bohai sea, China, showing the mean absolute percentage error (MAPE) of 4.27%. Simulation results demonstrate that the preheating medium mainly warms submarine pipe walls rather than the surrounding subsea mud. Furthermore, during the preheating process, the equivalent overall heat transfer coefficients deduced performs more applicably than the inverse-calculation method in presenting the unsteady propagation of fluid temperature with time and distance. Finally, according to the comparison results of 11 preheating plans, subject to a rated heat power and maximum flow, the preheating parameter at a lower fluid temperature combined with a higher flow rate will produce a better preheating effect. |
| first_indexed | 2024-04-11T20:54:04Z |
| format | Article |
| id | doaj.art-bceacbb1155a4e6886d86cd16fda857e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T20:54:04Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-bceacbb1155a4e6886d86cd16fda857e2022-12-22T04:03:46ZengMDPI AGEnergies1996-10732019-09-011218351810.3390/en12183518en12183518Numerical Simulation for Preheating New Submarine Hot Oil PipelinesYong Wang0Nan Wei1Dejun Wan2Shouxi Wang3Zongming Yuan4College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, Shaanxi, ChinaSchool of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, ChinaSinopec Petroleum Engineering Cooperation, Dongying 257088, Shandong, ChinaCollege of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, Shaanxi, ChinaSchool of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, ChinaFor new submarine hot oil pipelines, accurate simulation of preheating is difficult owing to complex transient flow and coupled heat transfer happening. Using quasi-steady equations to simulate preheating is inadequate as the hydraulic transient phenomenon is neglected. Considering this fact, this paper constructs an unsteady flow and heat transfer coupled mathematical model for the preheating process. By combining the double method of characteristics (DMOC) and finite element method (FEM), a numerical methodology is proposed, namely, DMOC-FEM. Its accuracy is validated by field data collected from the Bohai sea, China, showing the mean absolute percentage error (MAPE) of 4.27%. Simulation results demonstrate that the preheating medium mainly warms submarine pipe walls rather than the surrounding subsea mud. Furthermore, during the preheating process, the equivalent overall heat transfer coefficients deduced performs more applicably than the inverse-calculation method in presenting the unsteady propagation of fluid temperature with time and distance. Finally, according to the comparison results of 11 preheating plans, subject to a rated heat power and maximum flow, the preheating parameter at a lower fluid temperature combined with a higher flow rate will produce a better preheating effect.https://www.mdpi.com/1996-1073/12/18/3518submarine hot oil pipelinepreheating processnumerical simulationdouble method of characteristics (DMOC)finite element method (FEM)heat transfer coefficient |
| spellingShingle | Yong Wang Nan Wei Dejun Wan Shouxi Wang Zongming Yuan Numerical Simulation for Preheating New Submarine Hot Oil Pipelines Energies submarine hot oil pipeline preheating process numerical simulation double method of characteristics (DMOC) finite element method (FEM) heat transfer coefficient |
| title | Numerical Simulation for Preheating New Submarine Hot Oil Pipelines |
| title_full | Numerical Simulation for Preheating New Submarine Hot Oil Pipelines |
| title_fullStr | Numerical Simulation for Preheating New Submarine Hot Oil Pipelines |
| title_full_unstemmed | Numerical Simulation for Preheating New Submarine Hot Oil Pipelines |
| title_short | Numerical Simulation for Preheating New Submarine Hot Oil Pipelines |
| title_sort | numerical simulation for preheating new submarine hot oil pipelines |
| topic | submarine hot oil pipeline preheating process numerical simulation double method of characteristics (DMOC) finite element method (FEM) heat transfer coefficient |
| url | https://www.mdpi.com/1996-1073/12/18/3518 |
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