Electric Heater Power Calculation
The calculation of heating power involves the following three aspects:
Power during operation
Power during startup
Heat loss in the system
All calculations should consider the worst-case scenario:
Minimum ambient temperature
Shortest operating cycle
Maximum operating temperature
Maximum weight of the heating medium (maximum flow rate for flowing media)
Steps for calculating heater power:
Based on the process, draw a heating process flow diagram (without involving material forms and specifications).
Calculate the heat required for the process.
Calculate the heat required for system startup and the time needed.
Redraw the heating process flow diagram, consider an appropriate safety factor, and determine the total power of the heater.
Determine the sheath material and power density of the heating elements.
Determine the form, size, and quantity of the heaters.
Determine the power supply and control system of the heater.
