Heat load of the heating furnace

Personally, I think it is calculated based on the type of medium being heated, the amount of heat applied to each medium, the temperature of each medium before and after heating, and the specific heat capacity of each medium. That is: Q=Q1+Q2+Q3+Q4+…… The heat consumption for each medium being heated, Qn, is given by mλ(T2-T1), where “m” represents the flow rate of the medium being heated per unit time ； “λ” is the specific heat of the medium being heated ； “T1” is the temperature of the medium to be heated before heating ； “T2” represents the temperature of the medium being heated after heating ； “Qn” represents the total heat consumption per unit time for a certain heated medium. When the medium is not a single substance, the calculation can be done based on the proportions in the mixture; of course, it is also possible to carry out the calculation by knowing the weighted specific heat of the mixture. Meanwhile, reference can be made to the \"Design Manual for Heating Furnaces in Refineries\".