1 reply to this topic

[tonywen]

Helloo Everyone,

could you give a precise definition about the difference between the steady-state simulations and dynamic ones. Thanks in advance.

[Steve McGahey]

Helloo Everyone,

could you give a precise definition about the difference between the steady-state simulations and dynamic ones. Thanks in advance.

A Steady State simulation does not consider the effects of time. It assumes that the plant has reached steady operating conditions. This is best suited to answer questions like "if I want to get a certain pressure/flowrate in one part of the plant, how big should my valve be - or, if I want to get a certain composition in a part of the plan, how much of stream X should I add". This is frequently used to work out the duties of bits of equipment.

A Dynamic simulation does consider the effects of time. It assumes that the plant is in a state of change. This is better suited to answer questions like "if my compressor trips (fails, shuts down) how will my plant deal with it". We often use dynamic simulations to test different control strategies, by introducing disturbances or other problems to the plant, and seeing how well the controllers deal with the problem.

Hope this helps,
- Steve.