Experimental automation of a test bed to control the condensation and vaporisation pressure as well as the suction gas temperature: Due to extremely slow reaction of the cooling cycle the working points have been set empirically. This means that the automated performance measurement of such a difficult, time consuming control path is the challenge to program. For the determination of performance values must last for a specified time to conform to standards.

With the help of control algorithms (three control structures, independent from each, two recipes) working points can now be run-up faster and without dangerous overshoot. The complete process is logged for documentation purpose, but also to ensure continuous improvements.

Bitzer Group is the world largest independent manufacturer of refrigeration and air condition compressors. With sales and production locations for reciprocating, scroll or screw compressors as well as pressure vessels Bitzer is represented globally. In the year 2014 3,400 employees achieved a turnover of 657 million Euros. In the Rottenburg-Ergenzingen location 550 employees produce high quality screw compressors.