How is the electric heating power determined?

　　Set specific heat capacity c(specific heat capacity) J/(kg Kelvin);
Kelvin=K= absolute temperature
Let density=r (kg/m^3, kg/m3; volume = A (m^3, cubic meter);
Mass = Density * Volume = rA
Temperature difference = DT (°C);
Time=t(sec)
Effective utilization rate ~90%
Heating power * effective utilization rate = (rA) * c * DT/t (J/sec)
　　Annex:
　　The basic method of calculating the power of an electric heater
　　As we all know, when customers consult products, they often ask us how long from how many degrees to how many degrees, how much power to do, today we will explain to you the calculation method of the power of the heater.
　　First of all, the calculation of heating power should pay attention to the following three aspects:
　　1. Power at start-up 2. Power at operation 3. Heat loss in the system
　　Second, consider the following worst-case scenarios when calculating:
　　1. Lowest ambient temperature
　　2. Shortest operating cycle
　　3. Highest operating temperature
　　4. Maximum weight of the heating medium (for the flowing medium, the maximum flow rate)
　　Third, the steps of electric heater power design:
　　1. According to the process, draw the process flow diagram of heating (not involving material form and specification).
　　2. Calculate the amount of heat required for the process.
　　3. Calculate the amount of heat and time required to start the system.
　　Fourth, consider the appropriate safety factor to determine the total power of the heater.
　　1. Determine the sheath material and power density of the heating element.
　　2. Decide on the form, size and number of heaters.
　　3. Decide on the power supply and control system of the heater.
Finally, let's talk about the basic formula for calculating power:
1. Power required for initial heating:
　　kw=（C1M1ΔT+C2M2ΔT)+864/p+p/2
　　where: C1 and C2 are the specific heat of the container and the medium respectively (kcal/kg°C)
　　M1 and M2 are the mass of the container and the medium (kg) respectively
　　ΔT is the difference between the desired temperature and the initial temperature (°C)
　　H is the time required for the initial temperature to be heated to the set temperature (h)
　　P is the heat dissipation of the container at the final temperature (kw)
　　2. Power required to maintain the temperature of the medium:
　　kw=C2M3ΔT/864+P
　　where: M3 per hour of increasing medium (kg/h)
　　Total power: Take the maximum value of the above two types of power and consider the factor of 1.2.