Calculation of Balance Equations

Calculation of mass, energy and exergy balances for the total separation plant are usually done sequentially from apparatus to apparatus. They are occasionally carried out simultaneously by an iterative method, considering the corresponding equation system for the total separation process. In this case, it is necessary to develop a calculation flowchart with coded interface and ramification. The process structure is conveniently presented graphically. After mathematical formulation of the process, the number and values of the independent system variables are determined. Finally, the balance equations are solved sequentially. 

It is often convenient to present the results for a balance over a single piece of equipment, a process unit or total processes, and, if necessary, for combined processes. They can be quickly understood in clearly arranged flowcharts (Sankey diagram). 

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