JIAHai-feng,YANGBao-sheng,CAIHan-cheng,et al.Numerical Simulation Analysis of the Effect of U?shaped Heat Tracing Water Pipeline on Permafrost Temperature in Alpine Region[J].China Water & Wastewater,2023,39(11):49-55.
Numerical Simulation Analysis of the Effect of U?shaped Heat Tracing Water Pipeline on Permafrost Temperature in Alpine Region
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第11期
Page:
49-55
Column:
Date of publication:
2023-06-01
- Keywords:
- alpine region; water pipeline; U-shaped heat tracing pipe; temperature
- Abstract:
- In order to ensure that the buried water supply pipeline for scattered residents in alpine region does not freeze and to prevent the surrounding permafrost from melting due to heat dissipation of the pipeline and causing sinking damage to the buried pipeline, U-type pipes were used as heat tracing pipes to investigate their anti-freezing and heat preservation effects. Through the method of numerical analysis, the influence of U-type heat tracing pipe on the temperature of water pipeline and permafrost layer was studied. The results showed that the U-type heat tracing pipe had good effect of heat tracing and heat preservation; the maximum temperature difference between the import and export of the U-type heat tracing pipe was about 8 ℃ and the minimum was about 1 ℃ in the range of the studied parameters. Based on numerical simulation data of pipe lengths of 50 m and 120 m, the corresponding supply pipe lengths were predicted to be 587 m and 638 m when the temperature at the outlet of U-shaped heat tracing pipe dropped below freezing point, through the temperature difference between the inlet and outlet of U-shaped heat tracing pipe. The maximum temperature correlation of the permafrost layer was obtained, and the limit values of the inlet temperature and the inlet flow rate of the U-type heat tracing pipe could be obtained by this correlation. Thus, it could ensure that the permafrost layer would not be melted.
Last Update:
2023-06-01