LIQUID TANK

• Picture of the frontpanel of the simulator
• What is needed to run the the simulator? Read to get most recent information!
• Tips for using the simulator.
• The simulator: liquid_tank.exe (click to download). The simulator runs immediately after the download by clicking Open in the download window. Alternatively, you can first save a copy of the exe-file on any directory (folder) on your PC and then run the exe-file, which starts the simulator.

Description of the simulated system

A liquid tank with inflow and outflow is simulated. The tank has straight walls. You can adjust the inflow and the outflow during the simulation.

A mathematical model of the tank can be derived using mass balance of the liquid:

A*dh/dt = q_in - q_out

where A is the cross sectional area, q_in is the volumetric inflow and q_out is the volumetric outflow.

Aim

The aim of this simulator is to develop an understanding of the dynamic properties of a liquid tank.

Motivation

Liquid tanks are common in industrial process plants. It is useful to understand the dynamic properties of liquid tanks, for example in level control applications.

Tasks

1. (Theory.) Explain that the liquid level is proportional to the integral of the inflow and proportional to the integral of the outflow. (Tip: Calculate h(t) from the differntial equation.)
2. Characterize the response in the level if the inflow is constant and different from zero (and the outflow is zero))? Verify using simulations.

[KYBSIM] [TechTeach]

Updated August 14, 2004. Developed by Finn Haugen. E-mail: finn@techteach.no.