Dear All,
I’d like to ask you to help with one issue coming from HAZOP – propylene flashing during depressurization could cause freezing of cooling water inside of heat exchanger:
Shell side: liquid propylene (45°C @ 5.0 MPa g) - depressurization to 0.11 MPa g (-45°C)
Tube side: cooling water (20°C @ 0.55 MPa g)
How to check/calculate this?
I have an idea to compare evaporation enthalpy of propylene vs. enthalpy of water (20°C -> 0°C) with respect to hold-up.
Thanks!