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(3.6) A shell-and-tube heat exchanger will be used to cool 200,000lb/h of gasoline from 152F to 80F. Cooling water with a range of 60F to 100F will be used. Heat capacities are 0.6Btu/lbmF for gasoline and 1.0Btu/lbmF for water. (a) What flow rate of cooling water will be needed? (b) How many E-shells will be required for the heat exchanger? (c) Make a preliminary design calculation to estimate the heat-transfer surface area required in the heat exchanger. (d) If 1-in., 14 BWG tubes 25ft long are used, how many tubes will be needed to supply the heat-transfer area computed in part (c)? Ans. (a) 216,000lb/h. (b) 2