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Monitor is a trademark of Nalco Company, Naperville, Illinois, U.S.A.

Exchanger Train Economics

 

On a refinery crude unit the furnace inlet temperature can typically degrade at the rate of 5C (9F) per year owing to progressive fouling of the exchangers in the preheat train. In a 660 m3/h (100,000 bbl/day) refinery that represents an increased furnace duty of 2500 kW (8.5 MM BTU/hr) which, at todays prices, would costs in the region of $200,000 per year.

Fouling rates can vary widely one refinery reported a furnace inlet temperature drop of 8C (15F) over a single month. Unchecked that would have cost $3.6M per year.

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