Analysis on Freezing Progress of Underground Frost Wall

Abstract:

To optimize the operation parameters, the comparative analysis was used by means of the finite element analysis software ALGOR．In addition, equivalent specific heat and equivalent thermal conductivity were used during frozen. The conclusions were as follows: First of all, the higher velocity was, the bigger convective heat transfer coefficient will be ;What′s more, the convective heat transfer coefficient of the salt solution was 2 times bigger than the glycol solution；Last but the most important thing was that it was the best effect heat transfer that not only the medium was salt solution, but also the velocity was 0.57m/s. The result of experiment was consistent with the results of the simulations after field test.

• Periodical: Advanced Materials Research (Volume 904)
• Pages: 516-519
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.904.516
• Online since: March 2014
• Authors: Da Jun Zhao, Xin Fang, Yan Zhao*
• Keywords: ALGOR, Freezing, Heat Exchanger, Unfreezing Phasetransition

References

[1] TAO Yang, Application Basic Research of Soil Cold Storage with Seasonal Natural Energy in Severe Cold Climates, Harbin Institute of Technology, (2009).

[2] XIN Fang, DA jun Zhao , YAN Zhao , LI li Wang , Fluid Thermal Coupling Simulation Analysis on Underground Heat Exchanger of Frost Wall, J. Journal of Jilin University(Earth Science Edition) . 42(2012): 337-342.

[3] An-ping Zhao. A Study on the Mechanism of Microstructure of Frost Heaving in Subgrade Soil in Seasonal Frost Zone, Jilin University. College of Construction Engineering, 2008, pp.35-37.

[4] MIN Guo, The Study on the Long-term Cooling of the Vertical U-tube Ground Heat Exchanger, Harbin Institute of Technology, (2008).

[5] Xue-zu Xu. Experimental Study on Water Migration in Freeing and Frozen soils. Beijing, 1991, pp.21-26.