Abstract
Abstract.We provided laboratory results of temperature fields dynamic in permafrost ground under engineering construction which is modelling tank with oil. We wrote down non-stationary thermophysical model in the system “tank – bottom” considering mass-transfer of pore wetness. Calculated and experimental data approbation was made; close agreement of thawing halo location was shown with consideration of heat convection, associated with wetness migration in the area of thawed ground
Highlights
Abstract.We provided laboratory results of temperature fields dynamic in permafrost ground under engineering construction which is modelling tank with oil
Special topicality has a research of heat and mass transfer in permafrost grounds and their compatibility with engineering constructions
It is deduced from experiments pore wetness migration has a strong effect on ground thawing halo form and speed while thermal interference in the system «tank – bottom»
Summary
Experimental facility consists of the following items: climatic cell [2], container [16], heat –insulation [12], model of vertical steel tank [9], pump [6], heating system [4,5], system of cooling tubes [7, 8, 15], cryostat [3] and automatic temperature-measuring system in ground and tank [1, 13]. The total number of temperature sensors we used is 56, 11 of them are installed in the container to control oil temperature, gas space and container walls on various height. While experimentation circulate oil is made, which helps to keep temperature constant. Initial temperature of ground while experimentation is the same in every point and equal to the temperature of freezing unit, mines 10 °C. According to the sensors value temperature fields were made in ground in different moments (Fig. 2-5)
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