Numerical Simulation of Snow Melting on Pavement Surface with Heat Dissipation Pipe Embedded

概要

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A programmed software was developed in order to numerically simulate timevariation of temperature field and snow depth around a pipe-in-pile snow-meltingsystem, using meteorological data. The system utilized underground piles as heatexchanger between underground soil and water flowing inside the piles. The water waspumped into heat dissipation pipes embedded beneath pavement surface, on whichsnow melted. Unsteady three-dimensional heat conduction inside the pavement and theunderground soil was numerically solved. On the surface, heat balance of conduction,convection and radiation was considered. Snow fall depth was estimated by rainfallweather data, ratio of snowfall to rainfall, and dry density of snowfall. For simulatingsnow layer, unsteady one-dimensional heat conduction was solved while incorporatingpartial absorption of solar radiation. Experiments for measuring time variation of temperature field and snow depth around the system were conducted for verification ofthe software. The obtained simulation results showed good agreements withexperimental data, demonstrating utility and validity of the software.