The power of the electric heating tube required to heat 100kg of water from the initial water temperature of 10°C to 60°C in 60mins (3600s)?
Normal specific heat capacity of water: 4.2kJ/(kg·℃)
Heating temperature difference: 60-10=50℃
Required power (kw) = weight of water (kg) * temperature difference * specific heat capacity of water {kJ/(kg·℃)}/time (seconds)
Substituting the formula to calculate the heat power = 100*50*4.2/3600≈5.8KW
The power value of the required electric heating element can be obtained by dividing the different electric heating form by a certain thermal efficiency coefficient (such as 0.8-0.9).
Common water tank capacity corresponds to the power required time for every 10℃ heating up
The above table is for closed water tanks and is not applicable to fluid and thermal circulation systems; the default water tank is filled with water, if it is not full, it should be converted according to the actual capacity.