Case Study: Multi-sites energy efficiency audit in the framework of the ISO 50001 standard

Executive summary

• Axens was awarded a multisites energy efficiency survey including 2 complex refineries.
  
  
• With a tailor-made methodology and specific software, Axens successfully carried out this global study giving rise to energy efficiency practical recommendations for the customer. After a 7-step study, 74 solutions were identified, out of which 27 were included within the customer Action Plan with low payback time.
  
  
• The solutions proposed lead to a series of improvements: better thermal integration in the units, reduced steam losses, increased furnace and boiler efficiencies, and optimization of the operating.
  
  
• Quick wins had a potential for saving of around 15% of total energy consumption resulting in more than 40 million US dollars savings per year.