Considerations of thermal insulation and electric heating of external water pipes

Published on:

2023-03-08 13:09

With the continuous growth of high-rise buildings, increasing proportion of public facilities, and increasing external equipment, the original complex pipeline system is increasingly exposed in relatively open spaces. Improving the safety standards of pipelines in buildings has led to the fact that the freezing protection systems of pipelines are playing an increasingly important role in buildings. Especially in winter in the north, the outer water pipes are often frozen and blocked. In order to ensure the normal operation of the pipeline system, electrical heat treatment.

Self-limiting temperature electric heating cable is a long belt-type heat-limiting electric heating tape, and the resistivity of its heating material has a high positive temperature (PTC) system. Evenly squeeze the semi-conductive PTC polymer composite material between the two parallel cores of the metal wire, and wrap a layer of insulating material on the outside as a sheath so that the main electric heating cable can be used and can be used if necessary. And protective layers can be added. After the electric heating cable is turned on (note that the final core should not be connected), the current flows from one core through the PTC conductive material to the other core, forming a loop. The electrical energy heats the conductive material, and its resistance immediately increases. When the temperature of the core belt rises to a certain value, the resistance reaches Chengdu, which almost blocks the current, and its temperature is no longer high. At the same time, a heating system with a lower temperature is ideal for electric heating. The power of the electric heating cable is mainly controlled by the heat transfer process, and the output power is automatically adjusted according to the temperature of the heated system.

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