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DanWBR / dwsim

DWSIM is a Steady-State and Dynamic Sequential Modular Chemical Process Simulator for Windows, Linux and macOS.
https://dwsim.org
GNU General Public License v3.0
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CO2 Dry ice not forming #141

Open Greg66 opened 3 years ago

Greg66 commented 3 years ago

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

  1. Create a stream with pure CO2; TV-flash with 0 liquid fraction @ 25°C
  2. Property package: Ideal; Solid handling activated; Universal flash or SVLE (both give same result)
  3. add a valve with 1 bar outlet pressure
  4. Outlet stream consists of liquid and vapor phase @ -87°C. This is well below freezing point!

Expected behavior Outlet stream of valve should consist of CO2 ice and vapor, but no liquid.

Screenshots If applicable, add screenshots to help explain your problem. image

Desktop (please complete the following information):

Greg66 commented 3 years ago

For single component streams this was solved now by following commit: #161

Mixtures with multiple components need to be checked still -> SVLE flash

andr1976 commented 2 years ago

Works for single component CO2 - Mixtures seems to be a pain still (DWSIM 7.3.2)