Q$4/$ A laboratory load as shown in figure below requires $7\mathrm{.}6\frac{L}{s}$ of water entering the process at $29\mathrm{.}4C$ and

returning at $35C.$ The accuracy required is more precise than cooling tower can provide. The selected chiller

has adequate capacity, but a maximum leaving$-$chilled$-$water temperature of $15\mathrm{.}6C.$ Using a pair of bypass pipes

allows the mixing valve to supply the proper temperature to the process load and maintains acceptable water flow

rates and temperatures through the chiller. Design the pipes and estimated the head of pump.