A network for a process plant is shown in Fig P19.7.

(a) Calculate the energy targets for \(\Delta T_{\min }=10{ }^{\circ} \mathrm{C}\) and show a design that achieves these targets.

(b) Explain why the existing network does not achieve the energy targets.

[

(a) \(Q_{\mathrm{C}_{\text {min }}}=190 \mathrm{~kW} ; Q_{\mathrm{H}_{\text {min }}}=90 \mathrm{~kW}\);

(b) there is transfer across the pinch]

30 Steam 60 kW Heat exchanger 420 kW 110 FIGURE P19.7 Network for problem P19.7. 150 180 70 Process 50 Process 190 160 Steam 500 kW Cooling water 660 kW