In the era of globalisation and a steadily growing world population, an increasing worldwide energy demand is inevitable. Current studies show that the global primary energy consumption will increase dramatically by 2030 and that a 45% increase in energy usage is to be expected, in developing countries alone. Rising energy costs will be a consequence of this, which both general consumers and plant operators will have to deal with. Optimised process control can make a significant contribution in reducing energy use, reducing costs and therefore maximising profits.