In many heating systems and electrical appliances, the function of a direct heating source is performed by a special metal element. Most often this is a tubular electric heater (TEN), which can be presented in different versions. The most popular liquid or water models of such devices, although there are also air modifications. But in both segments you can find a flexible heating element, which compares favorably with the ability to take different positions during installation, maintenance and operation.
Features of flexible heating elements
The main difference between such models is the flexible structure of the structure, which allows you to literally lay the heater circuit in any technological niche. Initially, the problem of integrating tubular elements for heating was solved by manufacturing models with various shapes. They are still on the market in the form of intricate winding tubes for heating. And often such modifications justify themselves, because a rigid structure is maintained, and due to a standardized approach to circuit design, the problem of integrating traditional heaters into complex areas of operation is eliminated. Nevertheless, experts point to the versatility that distinguishes elastic heating elements. A flexible water heater can also be freely installed in moving circuits in which the use of rigid pipes is not possible.
Types of devices
Usually, the characteristics of the section are taken as the main feature of classification. In particular, square and rounded shapes are common. The choice for this parameter is determined by the operating conditions. Different types of heating elements focus on a specific range of applications. For example, when it comes to integrating into a square groove, it is appropriate to use a heater with an appropriate section. The contour will be tightly fixed in the opening, but will also require additional fixation using mechanical fasteners.
Models with a circular cross-section can be integrated without additional clips. If the groove material itself lends itself to slight deformation, then mounting with a holding force on a rounded plane is allowed. Also, a flexible heating element may differ in case materials. According to experts, the most technologically advanced and profitable products are manufactured on the basis of heat-resistant combinations of stainless steel and composites.
Installation of flexible tubular electric heaters
Before installation, the contour length should be carefully calculated and the pipe size should be determined in the thickness indicator - this will optimally integrate the element into the prepared groove. It is recommended that a flexible heating element initially have the necessary insulating shells that will protect the working surface from thermal influences and unwanted contact with moisture. Otherwise, you will first have to provide the heater with a special braid, which you will have to focus on when calculating dimensions.
Further, the pipe fits into the spatial technological form. As a rule, the bends of the heater can be realized with your own hands without special devices. The metal shell allows you to gently lay the contour in a ditch with subsequent fastening. It should also be noted that when connected, some heating elements for heating require additional technical processing. This usually refers to contact points that are treated with heat-protective pastes.
Advantages of flexible heating elements
The main advantage that caused the spread of such models of heating elements is the ability to take different forms. However, the list of advantages of the flexible element does not end there. Experts also note the fact that during operation, heating elements of this type ensure uniform heating regardless of the complexity of the adopted form. Moreover, low energy consumption, high heat transfer and low cost are emphasized. In terms of connection, a flexible heating element also demonstrates certain advantages. It is enough to note the variety of standards of the connected fittings. Among them, one can distinguish classic threaded clamps, an optional flat contact, ceramic terminals, as well as heat-resistant wires with different crimping characteristics.
Where is flexible heating element used?
Such electric heaters are used in equipment that does not provide sufficient protection against vibration or involves changing the configuration of the location of the heating circuit. For example, it can be hot-run units, plants for the production of various containers and plastic products, industrial equipment, technological components of public services systems, etc. In addition, heating elements with a flexible structure are used in pipeline maintenance. Full equipping of long lines with a circuit does not justify itself for financial reasons, but individual critical sections may well be provided with such heaters in order to protect against freezing.
Conclusion
A flexible heating circuit is an effective and at the same time practical means of solving the problems of district heating. The use of traditional hard elements also gives its advantages, but only in use in specialized industries. Universal flexible heating element is more functional, although not so protected from physical damage. Actually, its mobility and flexibility in installation opens up wide possibilities for application in domestic needs. So, to temporarily provide warm currents, such devices can be used in repair and construction works, for example, to maintain the optimum temperature of some building materials.