The efficiency of electric heaters fluctuates around 60 percent. When the explosion-proof electric heater is working, it can enter its input port through the pipeline under the action of pressure in the low-temperature fluid medium, and along its internal specific heat exchange flow path, the path designed by the fluid principle is used to convert the electric heating element generated during the operation. The high temperature heat energy is taken away, the temperature of the heated medium rises, and the outlet reaches the high temperature medium required by the process. Its internal control system automatically adjusts the temperature of the medium at the output port according to the temperature sensor signal at the output port; and when the heating element is overheated, its independent overheat protection device will immediately cut off the power supply. This design is to prevent material deterioration and coking. Or carbonization, or even burn out the components in more serious cases, which will affect the service life of the electric heater.
The calculation of heating power starts from the following three aspects:
1. Power during operation. power. heat loss in the system. All calculations should take the worst case into account: the lowest ambient temperature. shortest run. The highest cycle runs. Maximum weight of temperature heating medium (maximum flow rate for flowing medium)
2. Steps to calculate the heater power: According to the process, draw the heating process flow chart (does not involve the material form and specification).
3. Calculate the heat required for the process. Calculate the amount of heat and time required to start the system. Redraw the heating process flow chart, consider the appropriate safety factor, and determine the total power of the heater. Determine the sheath material and power density of the heating element. Determine the size and quantity of heaters. Determine the power supply and control system of the heater.