TC3.

Calculate the missing Duty ( Hint: CP= 3 )

• 107.5 kW

• 90 kW

• 125 kW

• 20 kW

How many utilities are used?

Calculate the CP at stream 1 (kW/ C)

• 2

• 2.5

• 1.5

• 3

The total heat recovery is?

• 107.5 kW

• 700 kW

• 380 kW

• 40 kW

Where should we place hot and cold utilities

• hot utilities below pinch

• cold utilities below pinch

• Heaters below pinch

• Coolers above pinch

Calculate the Duty if the CP is 2.5 and the temperature difference is 20°C.

• 30 kW

• 40 kW

• 60 kW

• 50 kW

What is the role of the cold utility (C) in the heat exchanger network?

• To provide heat to the hot streams

• To cool down streams that require heat removal

• To increase the energy requirement of the system

• To operate independently from the heat exchanger network

What is the significance of pinch temperature in network design?

• It represents the maximum heat transfer point in the network

• It identifies the minimum temperature at which heat transfer occurs

• It is the point where heating and cooling requirements are minimized

• It is the temperature where maximum heat loss occurs

A stream entering a heat exchanger at 118°C and exiting at 70°C, what is its purpose?

• It is a hot stream transferring heat to a colder stream

• It is a cold stream absorbing heat

• It is a hot stream transferring heat to a hotter stream

• It is a utility stream providing energy

Which strategy is commonly used in heat exchanger network design to optimize energy use?

• Using only hot utilities instead of heat recovery

• Integrating process streams to recover heat internally before using utilities

• Using multiple small heat exchangers instead of a few large ones

• Designing the system without considering pinch analysis