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Refer to the Block Flow Diagram in Figure 1 and stream data in Table 1.

Identify a suitable equipment for unit A.

• Heater

• Pump

• Evaporator

• Condenser

Refer to the Block Flow Diagram in Figure 1 and stream data in Table 1.

Identify a suitable equipment for unit B.

• Heater

• Pump

• Evaporator

• Condenser

Refer to the Block Flow Diagram in Figure 1 and stream data in Table 1.

Identify a suitable equipment for unit C.

• Heater

• Pump

• Evaporator

• Condenser

The surrounding air temperature is about 25^oC, hence there will be heat transfer along the pipeline from unit A to unit B.

Which of the following statement(s) is/are CORRECT?

• To minimise heat transfer along pipeline, an insulation layer must be added.

• Heat energy is transferred from stream 2 to the environment.

• Heat energy is transferred from the environment to stream 2.

• To minimise heat transfer along pipeline, increase the length of pipeline.

The rate of heat transfer from solution to surrounding air is governed by the following expression:

     Q = UAΔT

Q:        rate of heat transfer (W)

     A:         heat transfer area (m²)

     ΔT:      temperature difference between hot and cold fluid (K)

     U:        overall heat transfer coefficient

Which one of the following correctly represents the SI unit of U?

• [U] =[m²][W][K]

• [U] =[W]/[m²][K]

• [U] =[K]/[m²][W]

• [U] =[m²]/[W][K]

Refer to information provided in table 1, calculate the mass flowrate of stream 4 in kg/s.

Leave your answer in 3 d.p.

(Clue: All of the glycerol in stream 3 goes to stream 4)

(a)  

Refer to information provided in Table 1 and Figure 1,

calculate the OVERALL mass flowrate of stream 5 in kg/s.

Leave your answer in 3 d.p.

(Clue: Recall your concepts on mass balance)

(a)  

Unit B is a pump. Calculate the pressure increase across the pump and leave your answer in kPa.

(Clue: Recall your concepts absolute and gauge pressure. Use 1 bar = 10⁵ Pa)

(a)  

Stream 5 condenses completely into stream 6 after it goes through the condenser.

Calculate the VOLUMETRIC FLOWRATE of water vapour travelling through the pipe BEFORE entering the condenser.

Leave your answer in 3 d.p and in S.I. units.

(a)  

Stream 5 condenses completely into stream 6 after it goes through the condenser. Calculate the VELOCITY of water vapour travelling through the pipe BEFORE entering the condenser.

Given that the pipe has a diameter of 3.6 cm.

Leave your answer in 1 d.p and in S.I. units.

(Clue: Recall formula of cross-sectional area of a cylinder)

(a)