What are the benefits of electric heating?
Heating objects is an indispensable part of our daily life and production. We need to cook food for consumption, heat to keep warm, need to be purified and disinfected to maintain health, need to smelt metals, need to dry materials, and need to be done in whole or in part. Heat treatment, etc., can you imagine what it would be like on a certain day without heating? Yes, a society without heating will return to the state of the era of rumoring and drinking blood.
1. What is heating, what methods can be used to heat objects, and what heat source should be used?
Definition: Heating refers to the process in which the heat generated by the heat source is transferred to the object with a lower temperature to increase the temperature;
Heating methods are:
(1) Direct heating is to transfer heat directly to the heated body;
(2) Indirect heating is to first transfer heat to the intermediate medium to increase the temperature, and then transfer the heat to the heated body with lower temperature through the intermediate medium, such as.
Common heat sources are: coal, gas fuel, liquid fuel and electric heating.
2. What are the benefits of heating pads?
Among the many heat sources, it has developed to a very important level in the national economy, mainly because electric energy has the following series of advantages compared with other forms of energy heating:
1. High thermal efficiency. Compared with other energy sources, the thermal efficiency of coal is about 12-20%, the thermal efficiency of liquid fuel is about 20-40%, the thermal efficiency of gas fuel is about 50-60%, and the thermal efficiency of steam is about 45-60%. %, and the thermal efficiency of electric energy is about 50-95%;
2. The temperature rises quickly, and the electric heating can produce a large amount of heat energy in a small range, and reach the predetermined temperature more quickly;
3. The temperature is high, and can reach a high temperature of several thousand degrees in some occasions;
4. The electric heating has strong controllability, and it is easy to realize automatic temperature control and remote temperature adjustment;
5. No environmental conditions are required, unlike fuel combustion that requires oxygen, so the heated object is not easy to oxidize;
6. Electric heating does not pollute the environment, the residue and soot produced by heating are small, and at the same time, it can keep the heated body clean and hygienic;
7. Vacuum heating and controlled atmosphere heating are well used;
8. The thermal inertia is small, the temperature rises evenly, the whole or local heating can be realized, and the temperature control precision is high;
9. Compared with other heat sources, electric heating is safer in the presence of flammable and explosive objects. Fuel heating will produce open flames, which is very dangerous. Generally, electric heating must be used.
The electric heating film has a small one-time investment. The heated body can be easily moved and mechanized and automated in the electric heating heating zone. For example, in the drying tunnel made of metal shell, it is used to blow and circulate with a blower to automatically pass other materials such as leather through the machine. The transmission passes through the drying tunnel at a predetermined speed to achieve the purpose of drying it. It improves working conditions and saves costs. The above are the benefits of electric heating.
