September 2008

Special Report: Refining Developments

Crude preheat energy management leads to sustainable energy savings

Four case studies reveal that by outsourcing their preheat monitoring, refiners can achieve substantial benefits regardless of unit charge rates or types of crudes processed

Mason, B., McAteer, G., Nalco Company, Energy Services Division

Energy audits in a refinery traditionally identify energy lost due to fouling in the crude preheat as a major energy-savings opportunity. Saving energy on a crude preheat requires three pieces: computer simulation of the preheat network, the right strategy driving the cleaning/fouling control decisions, and routine collection/processing of preheat data to deliver sustainable (evergreen) energy savings. Routine data collection/processing (monitoring) of the crude preheat often competes with other priorities in the refinery for attention. A refiner can outsource the day-to-day preheat monitoring, enabling the refiner to achieve consistent energy savings throughout people/process changes. The

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