Process Circuit Analysis

Before proceeding, we will examine the structure of problem solving by considering the following procedure  

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list the appropriate relations and unknown variables for the problem 

specify or unspecify variables until the degrees of freedom are zero 

Polya [1], who has examined the nature of problem solving, has devised a similar procedure. He states, First, we have to understand the problem we have to see clearly what is required. Second, we have to see how the various items are connected, how the unknown is linked to the data, in order to obtain the idea of the solution, to make a plan. Third, we carry out our plan. Fourth, we look back at the completed solution, we review and discuss it.  

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From the previous discussion, equilibrium relations required for process circuit analysis are evidently in ortant. To achieve equilibrium requires equipment infinite in size, which is a physical and economical in jossibility. We must be satisfied wifii an economical approach to equilibriimi conditions. In some cases, because of rapid mass transfer or chemical reaction, the difference between actual and equilibrium conditions is insignificant. 

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