Design and Simulation of Non-Isothermal Cracking

2 Design and Simulation of Non-Isothermal Cracking Tubes for Olefins Production 

Simulating the furnace described above requires the following set of continuity equations for the components to be integrated, together with the energy equation and the pressure drop equation  

The pressure drop equation (9.3.2-3) accounts for friction losses in the straight part of the coil according to the Fanning equation and to the additional loss in the bends, according to Nekrasov s equation [1969]. Furthermore, 

The friction factor for straight tubes is taken from Knudsen and Katz [1958]  

The factor used in the equation for the supplementary pressure drop in the bends is given by Nekrasov  

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