Consider the Dowtherm A loop described in Section 22. 3. For the options involving multiple pumps either in series or parallel, determine the configuration that provides the maximum scaleup capacity. What are the temperatures of Dowtherm \(\mathrm{A}, T_{3}\), and \(T_{4}\), and the maximum percent scale-up?

Data from section 22.3

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In Section 22.2, it was noted how the performance of a distillation column was affected by the performance of the reboiler and condenser. It was possible to analyze the reboiler, column, and condenser sequentially in order to solve the scale-down problem. In this section, the performance of a reactor in which the large, exothermic heat of reaction is removed by a heat transfer fluid is examined. It will be seen that the bottleneck for scale-up of this process is the performance of the heat removal loop. The analysis of this problem is more complex than for the distillation column, because all units involved must be analyzed simultaneously in order to solve the problem The problem to be analyzed is illustrated in Figure 22.4. It is a part of the allyl chloride problem discussed in more detail in Appendix C. on the accompanying CD.