Mr. Lieberman, Process Improvement Engineering. Thank you for your books. I write to ask you a question. What is best in a heater to increase heater run length – very much air or very little air?
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Garcia – More air will certainly increase your heater run length. It will keep your fire box cooler, but also wastes energy. Optimizing the air to fuel ratio must always minimize heater run length and maximizes tube coking rates. It’s sad, but that’s just the way it is.
--Norm
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