Carbon fiber heating cable can adapt to the future development prospect of ultra-low temperature environment
Carbon fiber heating cables have been used more and more frequently in recent years, and the use cases are also expanding. The inner core of the carbon fiber heating cable is composed of a cold wire hot wire, and the outer layer is composed of an insulating layer, a grounding layer, a shielding layer and an outer sheath, and is made into a cable structure. With electric power as an energy source, voltage is applied to both ends of the carbon fiber, and the far infrared carbon fiber is far away. Infrared radiation radiates energy outward. Carbon fiber heating cable heating uses the whole ground as a radiator. The upper temperature of the indoor temperature is low and the lower layer is high. The feeling of warm and cool top makes you feel comfortable and natural. For example, the floor heating has only been popularized in the north, but as the concept changes, more and more southerners are also generally laying floor heating. In addition, with the continuous improvement of carbon fiber heating technology, carbon fiber heating cables have become more and more adaptable to ultra-low temperature environments, and have a larger application space.
1. A long time ago, electric heating technology using a metal material as a heating element has been widely used in various fields. However, the surface of the wire is easily oxidized at a high temperature. Due to the continuous thickening of the oxide layer, the area of the effective passing current is reduced, and the load of the current is increased, so that it is easily blown. Under the same allowable current load area, the wire is 6-10 times weaker than carbon fiber and is easily broken during use.
2. Carbon fiber is composed of a hexagonal lattice layer structure of graphite and is an "all black body material", so the electrothermal conversion efficiency is high in electrothermal applications. Under certain conditions, the high temperature does not oxidize, and the load strength and mechanical strength of the current per unit area do not change. At present, carbon fiber heating cables are widely used in low-temperature radiation heating cables, floor heating systems, constant temperature brooding boxes, flower houses, nurseries, vegetable greenhouses, etc., thermal insulation, road snow, airport runway snow, pipelines, tank insulation and antifreeze, football field lawns. As well as soil insulation in public green areas.
3. In terms of road snow and airport runway snow, carbon fiber cable can be used for heating floor heating in concrete structures. It can also be used in snow melting equipment to prevent frost on roof rainwater and drainage pipes, and also for soil heating. In the pipeline and tank insulation and antifreeze, electric heat tracing products have been widely promoted and applied in China. Its application areas are mainly concentrated in petroleum, chemical, electric power, railway and civil or commercial buildings. With the development of China's power industry, the market for electric heat tracing products with clean and no secondary pollution as the main energy source is very broad, and it also puts forward higher requirements for the performance of electric heating products.
In addition, carbon fiber heating cables can adapt to harsh environments such as high and low temperatures. Carbon fiber is as fine as spider silk. The specific strength of the three-type carbon fiber is more than 62 times that of steel, and the forming process is good. It is a new generation of engineering materials. Its elastic modulus is high, its anti-denatility is more than 2 times larger than that of steel, its tensile strength is 30~40t/cm2pa, and its specific gravity is less than one quarter of steel. It is one-half of aluminum alloy and has high elastic modulus. 16 times larger than steel and 12 times larger than aluminum. Carbon fiber is softer than steel, so it can be used for reinforcing cores that require cables that can bear weight and are less likely to damage internal components, such as submarine cables.
