Technical example of heating cable for snow melting and roof icing control

Published on:

2023-04-27 11:52

In the example of the snowmelt trench of the railway station in the north and the deicing of the canopy cornices, the use of heating cables for snow melting and anti-icing of the roof of large public buildings is presented. The main part of the station building has a roof height of 22 m and an area of about 2900 sq. m., has a light steel structure and a 0.4-0.5 m wide gutter. Podiums are located on both sides of the main building. Building of the station building The roof height of the podium part is 16 m, the area is 1000 sq. m. and 1700 sq. m., monolithic reinforced concrete slab structure. The shelter is a column-free platform with a span of 20 m, light steel structure, with an area of approximately 7000 m2 and a shed drain. In order to reduce the corrosive effect of melt water on a light steel roof and prevent ice from hanging on the canopy cornice and injuring people, the project provides for the laying of heating cables along the roof chute of the main structure and on the carport of the canopy. Canopy for snow melting and ice control.

The heating cable power is generally 10-20 W/m2, and the heat consumption per unit area is recommended during the snowmelt period of 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 stowage area can 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.

When using heating cables for heating, they are laid in the same way as for low-temperature water floor radiant heating: false, parallel, and two-parallel types, when used for pipeline heating-wave, linear, and spiral types. Mainly used.

Because the thermal power per unit area of heating cable is large when used for snow melting, and the stowage area is mostly narrow and strip-shaped, one or more heating cables are usually laid in parallel depending on the length of the gasket. Area.

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