Tutorial on multi flow systems

Past exam question

B3. Three process water streams meet at a junction mix and leave as a combined flow. Stream 1 is at 90 ˚C and flows at a rate of 1 kg/s. Stream 2 is at 50 ˚C and flows at a rate of 2kg/s. Stream 3 is at 30 ˚C . The total outlet flow is known to be 6 kg/s

i) Determine the flowrate of stream 3

[4 marks]

ii) Determine the final temperature of the outlet stream

[8 marks]

The junction is replaced with a heated tank 2 m in diameter and 2 m deep. The liquid level in the tank is observed to rise at a rate of 0.5m per hour.

iii) Recalculate the flowrate of stream 3 into the tank

[4 marks]

iv) Calculate the temperature of the out let stream

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Moderator Note

haley5p,

 

Please note that this is obviously homework. You will not get any answers, unless you show what you have so far done to solve these problems. Posting only the questions is not sufficient. You are obviously doing some engineering course, not a management course, so asking other people to do your work is not going to teach you the necessary skills to pass the class.

 

Everybody,

Please do not answer any questions until our OP has shown any efforts into solving these problems.