How to calculate Steam Load and Steam Consumption

 Steam Load Calculation 

            In general steam heating is used to

•       change a product or fluid temperature

•       maintain a product or fluid temperature

                                               

                                                 Formula for Steam Consumption in Heating Vessel 

                                                               Q = m c△ t

•       Q =  Quantity of heat or  energy ( unit : kj )

•       m =  mass of liquid ( Unit : kg or Litre )

•       c= Specific heat ( Unit : kj/kg )

•       △ t = change in temp

 Example : 

     5000 kg water heat from temp 20 to 80 degree at 3 kg steam pressure . Calculate steam consumption . 

•       Use formula Q = m c △ t

 •       m        = 5000 kg

•       C    = 4.19 kj/kg  ( Standard )

•       △ t    = ( 80-20) = 60 degree

 •       C ( Specific heat) : quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree

 •       m        = 5000 kg

•       C   = 4.19 kj/kg  ( Standard )

•       △ t    = ( 80-20) = 60 degree

•       Q = 5000 X 4.19x 60

•           = 1257000 kj

 •       Convert kj to kg

•       Divide by Latent heat of steam

 •       Amount of  heat required to convert 1 kg of liquid to vapour or steam  

 •       Latent heat of steam at 3 kg is 2163.22

        Q = 5000 X 4.19x 60

           = 1257000 kj

       Latent Heat of Steam = 2163.22  kj/kg

      = 1257000/2163.22

       =  581.07 kg 

                     

 Thanks 

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