Predictions and observations on the behaviour of a warm gas pipeline on permafrost
This paper deals with predictions and measured observations of the behaviour of a warm gas pipeline on permafrost. In the paper, descriptions of the theoretical background for a mathematical model developed by the Canadian Arctic Gas Study Limited will be made. The model incorporates the following a...
| Published in: | Canadian Geotechnical Journal |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1976
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/t76-045 http://www.nrcresearchpress.com/doi/pdf/10.1139/t76-045 |
| Summary: | This paper deals with predictions and measured observations of the behaviour of a warm gas pipeline on permafrost. In the paper, descriptions of the theoretical background for a mathematical model developed by the Canadian Arctic Gas Study Limited will be made. The model incorporates the following aspects: (a) transient heat conduction mechanism during freezing and thawing in the ground, in which the latent heat is considered as a heat source in the energy balance equation; (b) heat exchange mechanism at the ground surface with respect to meteorological data such as ambient air temperature, solar radiation, greenhouse factor, wind velocity, snow depth, and evapotranspiration; and (c) changes in geometry of the thermal domain due to thaw subsidence.Verification of the model was made using field data obtained from a hot-berm module with a gas temperature of 65 °F (18.3 °C), at the Norman Wells Test Facility of Canadian Arctic Gas Study Limited. Good correlation was found for predicted and measured values of: (a) ground temperature profiles in instrumented locations, (b) ground surface settlement, (c) pipe settlement, and (d) heat flux around the pipe. |
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