Made into a cable structure, using electricity as energy, using alloy resistance wire to generate heat to achieve the effect of heating or insulation. Usually there are single-conductor and double-conductor types, which are called heating cables.
Working principle of heating cable
The inner core of the heating cable is composed of cold wire, and the outside is composed of insulation layer, grounding, shielding layer and outer sheath.
After the heating cable is energized, it generates heat and operates at a low temperature of 40-60℃.
The heating cable buried in the filling layer transmits heat energy to the heated body through heat conduction (convection) and 8-13um far-infrared radiation
Composition and working principle of heating cable floor radiant heating system:
Power supply line → transformer → low-voltage distribution device → household electric meter → temperature control Device → heating cable → radiate heat to the room through the floor
Use electricity as energy
Use heating cable as heating element
Heat conduction mechanism of heating cable
When the heating cable is powered on, it will generate heat, and its temperature is between 40℃ and 60℃.
Through contact conduction, it heats the cement layer surrounding it, and then transfers it to the floor or tiles, and then heats the air through convection.
The heat conduction accounts for 50% of the heat generated by the heating cable
The second part is that when the heating cable is powered on, it will generate 7-10 micron far infrared rays, which are most suitable for the human body, and radiate to the human body and space.
This part of heat also accounts for 50% of the heat generated, and the heating efficiency of the heating cable is close to 100%.
The inner core of the heating cable is composed of cold wire, and the outer layer is composed of insulation layer, grounding layer, shielding layer and outer sheath.
After the heating cable is powered on, it generates heat and operates at a low temperature of 40-60℃.
The heating cable buried in the filling layer transmits heat energy to the heated body through heat conduction (convection) and 8-13μm far infrared radiation.
Advantages of using electric radiation heating
Beijing Zhonghai Huaguang proposed the view of “heating effect” to evaluate the heating rate, that is, the higher the proportion of heat dissipation entering the use area in the total input heat, the better the heating effect and the higher the heating efficiency.
The thermal efficiency of radiation heating is as high as 98%, of which about 60% is the energy transmission in the form of electromagnetic waves, radiating a large amount of infrared rays, and the direct heating surface of the enclosure structure heating body does not need to heat the air.
It not only meets the requirements of human heat dissipation, but also has excellent comfort.
In addition, the temperature gradient is 2-3℃ lower than that of convection heating, which greatly reduces the heat loss caused by temperature difference transmission.
This energy-saving heating method has been adopted by countries around the world and included in the energy-saving design standards.
Composition of the heating cable floor radiant heating system
This system consists of three parts: heating cable, temperature sensor (temperature control probe) and temperature controller.
For easy installation, manufacturers usually assemble the heating cable on the glass fiber net in advance, commonly known as “net mat heating cable” or “heating mat”.
As for heating cables, the most commonly used ones are single-conductor and double-conductor.
Among them, the structure of the single-conductor is that the cable enters from the “cold line”, is connected in series with the “, and then connected to the “cold line” to lead out.
The characteristic of the single-conductor heating cable is “having a head and a tail”, and both the head and the tail are the “cold lines” to be connected to the thermostat.
The double-conductor heating cable enters from the “cold line”, is connected in series with the “”, and then the “cold line” returns to the cable. Its characteristic is that the head and the tail are at one end.
The thermostat is a tool to achieve constant temperature and intelligent control of heating.
At present, the thermostats provided by our company mainly include low-priced knob-type thermostats and intelligent thermostats that can realize high and low temperature control and protection and can be programmed for 7 days with LCD display of temperature and programming in four periods every day.
This kind of thermostat can also realize monitoring and protection of overheating of working temperature by connecting the temperature probe in the working area.
Scope of application of heating cable:
Public buildings
Public buildings refer to buildings in the fields of office, tourism, science, education, culture, health and communication.
The area of public buildings usually accounts for 1/3 of the building area in the city. One feature of public buildings is that most of them have tall spaces.
In this space, the activity area of the crowd, that is, the working area, is only about 1.8m, which accounts for a small proportion of the space height.
When using traditional convection heating, most of the heat is consumed in the non-working area, resulting in poor heating effect and low heating efficiency.
However, ground radiation heating has won the world’s use of it as an energy-saving heating method in public buildings with its good heating effect and heating efficiency.
Practice has proved that in offices that are used for 8 hours a day and public buildings with low utilization rates at ordinary times, heating cables are used for heating. Due to intermittent heating, energy saving is more significant.
Residential buildings
The low-temperature radiant heating of heating cables not only has good heating effect and high heating efficiency, but also emits 8-13μm far infrared rays when working, which makes the human body feel comfortable and warm.
In addition, it is installed separately, convenient, clean, hygienic, does not need water, is not afraid of freezing, is environmentally friendly, controllable, and does not require investment in pipelines, trenches, boiler rooms, etc.
It has been widely adopted by more and more people, especially in villa buildings with independent doors and single households.
Buildings heated in this way are not only energy-saving, but also called “comfortable buildings” and “healthy buildings”.
Road snow melting
When there is a large slope on the road in front of the house, it will be difficult and dangerous for vehicles to go up and down the slope after snowing or icing in winter.
If we bury heating cables under the ruts of this slope to melt snow and ice, then this difficulty and danger will be effectively resolved.
In Harbin, my country, heating cables were laid in the ramp of the Wenchang Interchange with a slope of 4%, and good results were achieved.
The use of heating cable snow melting technology on airport runways has become relatively widespread and mature.
Pipeline insulation: Using heating cables to insulate oil and water pipelines is also a unique feature of heating cables.
Soil heating system
In the severe winter, it is necessary to ensure the normal use of the green stadium. Using heating cables to heat it to ensure that the grass is evergreen is also a good choice.
In addition, the use of heating cables to heat the soil in greenhouses is also very effective, which can effectively increase the ground temperature and promote the growth and development of plant roots.
Snow and ice melting on eaves
In the northern region, when melting snow, eaves often have ice hanging on them, sometimes more than one meter long and weighing more than ten kilograms. It is very dangerous to break and fall.
For this reason, laying heating cable snow and ice melting systems on the roof and eaves can effectively prevent the harm caused by ice and snow.
Bathroom floor heating system
In non-heating areas and non-heating seasons in heating areas, bathrooms are cold and damp, and heating is very important.
Using a heating cable floor heating system to heat the bathroom will make you feel warm, clean, hygienic, comfortable, and cozy, and it is more humane.
This is also the reason why most users use heating cable low-temperature radiation heating systems in the bathroom.
Heating cables are widely used for their safety, ease of use, easy control, easy installation (can be installed in any shape), long life, and low investment.
Buildings: Heating for schools, kindergartens, hospitals, office buildings, shopping malls, gymnasiums, halls, factories, garages, duty rooms, guard posts, etc.;
Antifreeze heating for garages, warehouses, storage, cold storage rooms, etc.; Heating and rapid drying and solidification of concrete construction in winter;
Advantages: Adapt to various environments, energy saving, significantly reduce use and maintenance costs
Commercial use: Heating for public bathrooms, hot yoga, saunas, massage rooms, lounges, swimming pools, etc.;
Advantages: Far infrared thermal radiation, not only meets Temperature requirements, and more health care and treatment effects;
Snow melting and ice thawing and anti-freezing: outdoor stairs, pedestrian bridges, building roofs, gutters, drain pipes, parking lots, driveways, airport runways, highways, ramps, bridge decks and other outdoor venues snow melting and ice thawing;
power towers, cables, equipment and other protection against freezing rain disasters, ice and damage;
Advantages of use: prevent hidden dangers caused by snow accumulation and ice, improve safety; ensure the normal operation of power facilities;
Industry: pipeline insulation of oil pipelines, water supply pipelines, fire protection pipelines, etc., tank insulation, oil, electricity and other exposed Antifreeze and heat preservation of the sky and its equipment;
Advantages: ensure the normal operation and use of pipelines, tanks and equipment;
Portable heating: heating of train compartments (replacing electric heaters), portable heating of movable board houses and light-weight houses;
Advantages: energy saving, high thermal efficiency, portable heating, convenient and detachable
Agriculture: soil heating and environmental heating in greenhouses, flower houses and other planting environments, breeding farms, pig farms, aquariums, etc.;
Advantages: ensure the temperature required for planting and breeding degrees, maintain a good environment, promote the growth of plants and animals, and improve the survival rate
Sports: swimming pool floor heating and pool water insulation, gymnasium, football field open-air lawn antifreeze;
Advantages of use: increase ground temperature, increase environmental comfort, and protect long-term growth of lawns;
Others: places and objects that need heating, heating and insulation
Significant features of the heating cable low-temperature radiation heating system
Using heating cables for heating is a green and environmentally friendly heating method that is safe and pollution-free.
The use of coal-fired boilers for heating is the main factor causing air pollution in the area.
According to data from a northern city in my country, for every 1 million square meters of heating area, 58,300 tons of coal will be consumed in a heating period, 607 tons of smoke and dust will be discharged, 1,208 tons of CO2 and nitrogen oxide gases will be discharged, and 8,500 tons of ash will be discharged,
causing the area to exceed the standard of level three or more for more than 100 days during the heating period, causing the annual blue sky project plan to fail.
To change the current situation, only by changing the energy structure, using heating cables for heating should be the best solution.
Good heating effect and high heating rate
As mentioned above, the use of ground radiation heating is the best among other heating methods in terms of heating effect and heating efficiency.
Excellent controllability, truly realizing household and room control and regional control, easy to operate
The heating cable low-temperature radiation heating system is simple and easy to operate in terms of manual and automatic programming control, which is conducive to energy saving.
Practical data proves that in the heating system, through temperature control and household metering measures, energy consumption can be reduced by 20%-30%.
The heating cable low-temperature radiation heating system can be easily realized in terms of household and room controllability, and its energy-saving effect is more obvious in dual-income families and public buildings.
Abandoning the construction and investment of pipelines, trenches, radiators, etc., saves land and increases the use area. According to statistics, it can save land and increase the use area of buildings by about 3-5%.
No water is needed, no fear of freezing, open when in use, close when not in use, more conducive to intermittent heating and energy saving of buildings.
Comfortable and warm, does not occupy wall space, conducive to building decoration and renovation.
Long life and low maintenance cost. When the installation meets the requirements and the operation is proper, the system life is the same as the building, and no maintenance and repair are required for many years.
It is conducive to the “peak shaving and valley filling” of urban thermal power systems. In the power supply system dominated by thermal power, the most headache is the “peak shaving” problem.
Although the “peak shaving” problem can be solved by “pumped storage”, the cost is high and the efficiency is low. The peak electricity price must be increased to solve the “peak shaving” problem.
The concrete filling layer of this system, which is about 10cm thick, is a good heat storage layer.
We can use the electricity during the valley to heat and store heat. This is a three-pronged thing that has “peak shaving”, energy saving and increased revenue.
Simple installation and low operating costs. Since this system does not require infrastructure, the equipment required for installation is very simple and the construction is also very convenient.
There is no need to worry about pipe leakage, no need to reserve holes on the floor, and no need to hang accessories on the wall, so the installation and construction are simple.
In buildings with energy-saving facilities, the operation cost is not higher than other types of heating costs when using low-peak electricity prices. If it is an office or a dual-income family, the operating cost is lower when intermittent heating is used.
Product advantages of heating cables
Comfortable, health, clean, long life, maintenance-free
The heat source of the heating cable floor heating is at the bottom, warming the feet first, and the human body heat utilization rate is the highest.
The floor heating temperature decreases with height, making the brain more focused and the thinking clearer, which conforms to the traditional Chinese medicine health care principle of warm feet and cool head.
The temperature difference between indoor and outdoor at the head height is small, and it is not easy to catch a cold, which is especially beneficial for the elderly, women and children.
It does not change the air humidity, avoids air convection and dust flying, and makes the environment clean and pleasant; the installation of electric floor heating is carried out at the same time as the floor decoration of the house.
The heating cable is laid in the cement layer under the tiles, wooden floors or marble.
The service life is as long as the building. As long as it is not damaged, it can guarantee normal operation for more than 50 years, and basically no maintenance is required.
Spacious, simple, heating, dehumidification, and mildew-proof
The heating cable is laid under the ground, does not occupy the room’s usable area, and there are no boilers, pipes, radiators, cabinets, etc., making the interior layout freer, more spacious and more beautiful.
The heating system provides comfortable heating in winter and can remove moisture and mildew in humid seasons.
Safe, environmentally friendly, energy-saving, and low cost
The use of heating cables for heating does not cause leakage or short circuit, and is not dangerous; there is no water or gas loss, and there is no waste gas, waste water, or dust generated by other heating methods.
It is a green, environmentally friendly, and health-care heating method; the thermal efficiency is high, and the same comfort effect is 2-3℃ lower than the traditional convection method, the total heat consumption is low, there is no water, coal, or gas loss, and it is energy-saving and environmentally friendly;
The temperature of each room can be closed and adjusted at will, and economic operation can save 1/3-1/2 of the cost, the initial investment and usage fee are both low, and no property management is required.
please feel free to contact us for further information on heating cable wires.
sales5@lifetimecables.com
Tel/Wechat/Whatsapp:+86 19195666830
Post time: Jun-07-2024
