HOW DOES THE FROST PROTECTION OPERATE?
By applying the heating cables, with a suitable power, along the pipes or inside the pipes in direct contact with the medium, the heat is provided that is needed to compensate the heat loss from the pipes.
How about the energy consumption?
The heating cable has a very high efficiency as the heat is generated directly in the return wire of the cable.
The application of the cable is made in such a way that a good thermal contact is obtained between the cable and the medium that is to be frost protected.
These two facts together with a thermostat that is controlling the cable to be switched on only when there is a risk of freezing, make frost protection applications with heating cables very much energy saving.
Rule of thumb:
10 Watt/m is sufficient power to frost protect:
- a 50 mm water supply and sewer system pipe applied in the ground.
- a 50 mm water supply and sewer system pipe insulated with 50mm at -25°C.
- a 25 mm water supply and sewer system pipe insulated with 50mm at -35°C.