Calculators
Process-side duty (sensible + latent), heater efficiency from stack loss, fuel firing rate, and radiant/convection duty split for a fired heater.
Method: process duty = Ḵ·Cp·ΔT + Ḵ·fvap·Hvap; efficiency = 1 - (stack loss / LHV + 2% radiation/unaccounted); fuel duty = process duty / η. Reference: Kern, Process Heat Transfer (1950), Ch. 19; API 560 for detailed fired heater design.
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