Electric Heater Power Calculation Method
1. Generally, the design calculation of the electric heater is carried out in the following three steps:Electric Heater Design Calculation:
1.Calculate the actual power required to maintain the medium temperature unchanged.
2.Calculate the power required to heat from the initial temperature to the set temperature within a specified time.
3.Based on the above two calculation results, select the model and quantity of the heater. The total power takes the maximum of the two powers and considers a factor of 1.2.
Formula:
1.Power required to maintain medium temperature
KW=C2M3△T/864+P
Where: M3 is the medium added per hour in kg/h
2.Power required for initial heating
KW = ( C1M1△T + C2M2△T )÷ 864/P + P/2
Where: C1C2 are the specific heats of the container and medium respectively (Kcal/Kg℃)
M1M2 are the masses of the container and medium respectively (Kg)
△T is the difference between the required temperature and the initial temperature (℃)
H is the time required to heat from the initial temperature to the set temperature (h)
P is the heat dissipation of the container at the final temperature (Kw)
2. Electric Heating Performance Curves Below are some performance curves frequently used in electric heating calculations.
