15.

(a) For the network shown in Fig. P1-15(a), find the flow rate in each pipe and the pressure at each node if the pressure at node A is 100 psig (C = 100).

(b) If heat exchangers and valves are added as shown in Fig. P1-15(b), find the "C" values needed for the valves if the flow rates are to be evenly divided in each heat exchanger.

The loss (in the units of head, ft-lbf/lbm) through each of the heat exchangers is 63Q2, where Q is the flow rate in CFS.

What pressure increase and flow rate are required for a pump if it is placed after node B and if the pump is to return the fluid to the same pressure as at node A? What is the power the pump delivers to the fluid?