Referring to Example 21. 3, it has been decided that the storage tank should be kept at 1 bar and the reactor pressure at 1. 2 bar. To provide the pressure head required, a pump is placed in line before the heat exchanger. For the 50\% increase in flow desired in Example 21. 3, answer the following:

a. What pressure head must be produced by the pump?

b. Which of the pump/impeller systems given in Figure 21. 4 is capable of providing sufficient flow?

Figure 21.4

c. At what location in the system would you place the pump? Explain why.

Data from example 21.3

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Head (m) 90 80 70 7 in 8, in Speed: 3500 rpm Impeller Sizes: 6, 7, 8 in 60 50 40 30 20 10 T 6 in b-b a-a 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 "1" DP Flowrate, v (m/min) Centrifugal Pump