Split-fraction coefficient estimation

The fresh feeds will be known from the process specification so if the split-fraction coefficients can be estimated, the equations can be solved to determine the flows of each component to each unit. Where the split-fractions are strongly dependent on the inlet flows, the values can be adjusted and the calculation repeated until a satisfactory convergence between the estimated values and those required by the calculated inlet flows is reached. 

Guide rules for estimating split-fraction coefficients... 

The split-fraction coefficients can be estimated by considering the function of the process unit, and by making use of any constraints on the stream flows and compositions that arise from considerations of product quality, safety, phase equilibria, other thermodynamic relationships and general process and mechanical design considerations. The procedure is similar to the techniques used for the manual calculation of material balances discussed in Section 4.3. 

Suggested techniques for use in estimating the split-fraction coefficients for some of the more common unit operations are given below. 

The program includes a routine to enable the initial estimates of the split-fraction coefficients to be easily changed, and can be run in an interactive manner to find the values that satisfy the design constraints (process specifications and equipment parameters). 

THE PROGRAMS CALCULATE THE FEEDS TO EACH UNIT FROM ESTIMATES OF THE SPLIT FRACTION COEFFICIENTS AND THE FRESH FEEDS THREE SEPARATE BASIC PROGRAMS ARE USED "... 

SET UP A DATA FILE CONTAINING THE INITIAL ESTIMATES OF THE " SPLIT FRACTION COEFFICIENTS AND FRESH FEEDS "... 

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