Electric heating device for melting ice and snow liquid on ascents and descents

Published on:

2023-04-27 11:50

In the winter in the northern part of my country because of snow and ice on the road surface, especially ice and snow accumulated on the climbs and descents, motor vehicles are difficult to operate and many accidents occur. Mountainous areas are even more difficult to manage. In order to further increase the speed of safe passage of vehicles to ramps and exits in winter, to ensure traffic safety as much as possible. In China, ice and snow removal often uses the method of mobilizing police or labor to sprinkle icy and snow-covered roads with salt, and sometimes chemicals or mechanical methods are used to remove snow, a lot of manpower and material resources are spent on. And there is a certain amount of environmental pollution and waste resources. In the shortage situation, it is also difficult to use the above methods for lifting and descending.

The electric heating for melting snow uses electricity as a power source and uses alloy resistance wire made from cable construction to conduct electricity and generate heat to achieve the effect of heating or heat preservation. There are usually single core and double core conductors. As a method of completely removing ice and snow, the method of electric heating snow melting has abundant energy, especially in the northern regions, where ice and snow persist for a long time and the intensity is high, it still has great applicability. The advantages of electric snow melting make it possible to avoid the disadvantages of chemical snow melting and traditional thermal snow melting, and also have the best technical conditions for snow melting and ice control on the slopes.

The power of the snow melting electric heater is generally 10-20 W/m2, and the heat consumption per unit area of snow melting is recommended 200-250 W/m2. When calculating the heat consumption of the snow melting system, the following factors should be taken into account: installation location, installation method and area. Studies show that depending on the stowage area and the melting rate of the electric heating cable, the range of heat consumption per unit of actual installation area may be 175-250 W/m². Two types of electric heating cables for melting ice and snow are optional: 20 W/m rated single core electric heating cable, 18.5 W/m rated double core electric heating cable.

By connecting to an external power supply, the conductive asphalt concrete converts electrical energy into thermal energy, necessary for the melting of snow and ice. Therefore, a temperature drop occurs inside the asphalt concrete, and the heat is diverted from the inside to the road surface. Snow on the road absorbs heat, and when the temperature reaches 0 ° C, it continues to absorb heat and melts into water. In the process of melting snow and ice, due to the influence of wind speed and temperature differences, part of the heat on the road surface is melted into the water due to thermal conductivity, convection and radiation. In the process of melting snow and ice, due to the influence of wind speed and temperature differences, part of the heat on the road surface melts snow and ice due to thermal conductivity, convection and powerful radiation. The thermal conductivity of the asphalt is 0.062 W/(m · K), and one or two layers of conventional asphalt concrete laid under the conductive asphalt concrete can be used as a thermal insulation layer to reduce thermal conductivity down.

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