In order to optimal design of the structural layout and operating parameters of the bridge deck fluid heating system,and further improve the snow melting efficiency,based on COMSOL Multiphysics multi-physics field coupling simulation platform,a three-dimensional computational model was constructed to analyze the snow melting efficiency of circulating pipeline-heated bridge decks by characterizing the process of melting the snow layer of bridge decks into water with the process of phase change.The accuracy of the new numerical model was verified by the experimental data in the literature,and the model was used to simulate and analysis the influence of the pipe inlet fluid temperature,geothermal pipe burial depth,pipe spacing,pipe diameter,snow layer thickness and fluid temperature along the loss on the bridge deck snow-free rate,snow melting rate and temperature field distribution.The simulation results showed that the thickness of the snow layer over 0.04 m would significantly reduce the snow melting rate of the heat pipe melting system,and the increase of the temperature of the pipe inlet fluid made the growth rate of the snow melting rate decrease gradually,and the temperature difference between the fluid inside the pipe and the bridge deck structure in the process of heat transfer decreases constantly,which exhibited a nonlinear temperature decay effect.The results of the study could provide data support and technical reference for the efficiency analysis and optimal design of the related bridge deck fluid heating system.
circulation pipe bridge heating systemsnow-melting and de-icing modelnumerical simulationsnow-melting efficiencygeothermal energy
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