Control of a cooling tower

For this project, we were dealing with an installation with more power. The master switch of 400A drives 2 pumps of 55kW and 2 industrial fans of 7,5 kW.

To control these cooling towers, we used a Siemens PLC S7-313C 2DP with a 6" touchscreen. Each motor is controlled with a frequency control through the Profibus network. The PLC controls the functioning of the pumps according to the pressure and the functioning of the industrial fans according to the temperature.

pilotage tour de refroidissement
control of a cooling tower

The automation of this installation has realised savings in energy consumption thanks to the controlling with the frequency controller. Thanks to the touch screen, we realised a registration of the data on a memory stick (pressure, temperature, time of functioning, consumed energy, ...) so that this can be exported in a Microsoft Excel worksheet and can be analysed.