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 power actually required to maintain the medium temperature unchanged.
2.Calculate the power required to heat from the initial temperature to the set temperature within the 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 above two powers and considers a1.2 factor.
Formula:
1.Power required to maintain the medium temperature
KW=C2M3△T/864+P
Where: M3 is the medium added per hourkg/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 often used in electric heating calculations.
