Process control

Process control systems have significant influence on the overall energy use by controlling all the processes on a site. Therefore it is important to make sure they are well maintained and regular checks are carried out.

• Carry out a walk around
  Check regularly for signs of poor control. See Signs of Poor Control. Further guidance and checklists are given in Conducting a process control health check (GPG354).
• Count the number of controllers that are set to manual
  The best controlled plants have less than 2% of control loops on manual control. Over 10% may mean that the control system is not be operating efficiently.
• Ensure that control equipment is regularly maintained in accordance with manufacturer’s instructions.
• Monitor energy consumption of process.
  Changes in the energy use per unit will show if process control is being less, or more, efficient.