- Determine the minimum number of heat exchanger above and below the pinch. (10 marks) - Construct the heat exchanger network above and below the pinch. (10 marks) - Construct the MUMNE network diagram. (10 marks) Table 1: Stream Data The PFD diagram of a plant to produce propylene from plastic waste is shown in Figure 1 . The stream conditions are listed in Table 1. From the PFD: b. Design the heat integration for the heat exchanger network using the MUMNE algorithm: - Choose a minimum approach temperature of 20gC and construct a Temperature Interval Diagram. (15 marks) - Construct the cascade diagram and determine the pinch temperature. (10 marks)