To exchange heat between four streams with (Delta T_{text {min }}=20^{circ} mathrm{C}), the HEN in Figure 11.61

Question:

To exchange heat between four streams with $\Delta T_{\text {min }}=20^{\circ} \mathrm{C}$, the HEN in Figure 11.61 is proposed. Determine whether the network has the minimum utility requirements. If not, design a network with the minimum utility requirements. As an alternative, design a network with the minimum number of heat exchangers. Using the specifications in Example 11.6, which alternative is preferred?

Figure 11.61:-

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