In a process design, the following process streams must be cooled or heated:

• Use the MUMNE algorithm for heat-exchanger networks and a minimum approach temperature of 20°C.
• Determine the temperature interval diagram.
• Determine the cascade diagram, the pinch temperatures, and the minimum hot and cold utilities.
• Determine the minimum number of heat exchangers above and below the pinch.
• Determine a heat-exchanger network above the pinch. Is there a solution that is not the “direct match”?
• Suppose that there is an additional constraint that the only hot utility is steam at 215°C. What effect does the hot-utility constraint have on the heat-exchanger network above the pinch?
• Determine the heat-exchanger network below the pinch.

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Stream No.10-3 m Cp kW/°C Temperature In °CTemperature Out °C 4 5 4 3 1 2 WN 3 4 250 200 140 170 180 160 230 210