What is Dynamic Condition in Plant? Why Dynamic Simulation? Condition in which parameters are changing with respect to time, it's called dynamic condition. E.g. when we take start up of the plant, levels in the vessels, temperatures, pressures, flow rates are changing. Shut down of the plant is similar situation as start up where parameters are changing with time. Similar situation is during malfunctioning of either equipment or instruments. E.g. if distillation column in a plant is running in a steady state mode, what happen if there is sudden trip of the pump supplying cooling water to the condenser? suddenly, pressure of the column starts shooting up. This is one example, but there are so many examples in the plant. Now, the question is how to tackle with dynamic condition. The answer is by introducing control systems, like pressure control, level control, flow control and temperature control. The function of any control system is to suppress the disturbance in the plant and bring plant once again into steady state condition.