Week 8 Challenge

Question-1

Fire case scenario:

Answer:

Relieving temperature = 76.62 C

Mass heat of vaporization = 144.4 Btu/lb or 335.8 KJ/Kg

Calculated orifice area = 19.14 cm2

Selected orifice area = 23.225 cm2 (M)

Orifice designation = 4 M 6

Note: Simulation file is attached below (PSV week 8 question 1)

Question - 2

Control valve scenario:

Answer:

The maximum saturated steam flow across the control valve or the relieving flowrate through the PSV is 10930 kg/h

Calculated orifice area = 6.803 cm2

Selected orifice area = 8.303 cm2 (J)

Note: Simulation is attached below (PSV week 8 question 2)

Question - 3

Blocked outlet scenation:

Answer:

Calculated orifice area = 1.633 cm2

Selected orifice area = 1.980 cm2 (F)

The calculated inlet and outlet line sizing line size is given below.

Note: Simulation is attached below (PSV week 8 question 3)