Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils
In this work the authors considered a freezing-and-melting process of soils under the polyurethane-insulated polyethylene heating pipeline, which is used in the regions with permafrost soils. Temperature field dynamics of the “pipeline – soil” system is determined by heat conductivity equation in...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Peter the Great St. Petersburg Polytechnic University
2014-04-01
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| Series: | Инженерно-строительный журнал |
| Subjects: | |
| Online Access: | http://www.engstroy.spb.ru/index_2014_02/03.pdf |
| _version_ | 1811341861430755328 |
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| author | M.P. Akimov S.D. Mordovskoy N.P. Starostin |
| author_facet | M.P. Akimov S.D. Mordovskoy N.P. Starostin |
| author_sort | M.P. Akimov |
| collection | DOAJ |
| description | In this work the authors considered a freezing-and-melting process of soils under the polyurethane-insulated polyethylene heating pipeline, which is used in the regions with permafrost soils.
Temperature field dynamics of the “pipeline – soil” system is determined by heat conductivity equation in polar coordinate system. The corresponding two-dimensional Stefan problem is solved by the finite differences method. The authors propose to determine the thickness of pipeline thermal insulation and the embedment depth upon the condition of melting depth reduction to an annual thawed layer of soil identified before the heating season. There are presented results of isotherm calculations for underground heat supply pipelines interacting with frozen soil. These results show that reduction of melting depth to annual thawed layer is probable.
The calculations were carried out for simulated soil and temperature conditions of Yakutsk, Republic Sakha, Russia. Nevertheless, the results obtained can be applied in other permafrost areas. |
| first_indexed | 2024-04-13T19:01:25Z |
| format | Article |
| id | doaj.art-8d74de117cb545faac4b74819d1d4821 |
| institution | Directory Open Access Journal |
| issn | 2071-4726 2071-0305 |
| language | English |
| last_indexed | 2024-04-13T19:01:25Z |
| publishDate | 2014-04-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Инженерно-строительный журнал |
| spelling | doaj.art-8d74de117cb545faac4b74819d1d48212022-12-22T02:34:05ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-47262071-03052014-04-01462142310.5862/MCE.46.3Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soilsM.P. Akimov0S.D. Mordovskoy1N.P. Starostin2North-Eastern Federal University in YakutskNorth-Eastern Federal University in YakutskInstitute of Oil and Gas Problems, Siberian Branch of the Russian Academy of SciencesIn this work the authors considered a freezing-and-melting process of soils under the polyurethane-insulated polyethylene heating pipeline, which is used in the regions with permafrost soils. Temperature field dynamics of the “pipeline – soil” system is determined by heat conductivity equation in polar coordinate system. The corresponding two-dimensional Stefan problem is solved by the finite differences method. The authors propose to determine the thickness of pipeline thermal insulation and the embedment depth upon the condition of melting depth reduction to an annual thawed layer of soil identified before the heating season. There are presented results of isotherm calculations for underground heat supply pipelines interacting with frozen soil. These results show that reduction of melting depth to annual thawed layer is probable. The calculations were carried out for simulated soil and temperature conditions of Yakutsk, Republic Sakha, Russia. Nevertheless, the results obtained can be applied in other permafrost areas.http://www.engstroy.spb.ru/index_2014_02/03.pdfpipelinepermafrosttemperaturethe Stefan problemthawing depthembedment depthinsulation thickness |
| spellingShingle | M.P. Akimov S.D. Mordovskoy N.P. Starostin Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils Инженерно-строительный журнал pipeline permafrost temperature the Stefan problem thawing depth embedment depth insulation thickness |
| title | Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils |
| title_full | Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils |
| title_fullStr | Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils |
| title_full_unstemmed | Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils |
| title_short | Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils |
| title_sort | calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils |
| topic | pipeline permafrost temperature the Stefan problem thawing depth embedment depth insulation thickness |
| url | http://www.engstroy.spb.ru/index_2014_02/03.pdf |
| work_keys_str_mv | AT mpakimov calculatingthermalinsulationthicknessandembedmentdepthofundergroundheatsupplypipelineforpermafrostsoils AT sdmordovskoy calculatingthermalinsulationthicknessandembedmentdepthofundergroundheatsupplypipelineforpermafrostsoils AT npstarostin calculatingthermalinsulationthicknessandembedmentdepthofundergroundheatsupplypipelineforpermafrostsoils |