Coupled sulfur/nitrogen fired-heater heat-recovery credit balance
RefineryHydrotreatingSulfurNitrogenFiredHeaterHeatRecoveryCreditBalance
consumes a qualified heat-recovery balance and a caller-owned utilization
fraction. It reports utilized and unutilized recovered heat plus avoided and net
fuel input, fuel mass, fuel cost, and fuel emissions.
The receipt reuses the qualified fired-heater efficiency, fuel LHV, caller-owned price, and caller-owned emissions factor. Its explicit closures are:
recovered heat = utilized recovered heat + unutilized recovered heat
original fuel power = avoided fuel power + net fuel power
RefineryHydrotreatingSulfurNitrogenFiredHeaterHeatRecoveryCreditBalance credit =
RefineryHydrotreatingSulfurNitrogenFiredHeaterHeatRecoveryCreditBalance.calculate(
recovery, callerSpecifiedUtilizationFraction);
double avoidedFuelKgPerHour = credit.getAvoidedFuelMassFlowKgPerHour();
double netFuelCostPerHour = credit.getNetFuelCostPerHour();
double netFuelEmissionsKgCo2ePerHour =
credit.getNetFuelEmissionsKgCo2EquivalentPerHour();
For the public 1000 kg/h DOE/OEDI Big Hill chain, the qualified 60% recovery scenario provides 0.054679523 MW recovered heat. An illustrative caller-owned 75% utilization fraction gives 0.041009642 MW utilized heat, 0.013669881 MW unutilized heat, 3.473757952 kg/h avoided fuel, 1.389503181 caller-currency units/h avoided fuel cost, and 10.421273857 kg CO2e/h avoided caller-scenario fuel emissions. Net fuel use is 70.374697316 kg/h. These scenario values qualify the arithmetic only; they are not defaults, measurements, recommendations, market prices, or lifecycle factors.
U.S. Department of Energy process-heating guidance identifies recovered exhaust heat as an opportunity to reduce furnace fuel use while emphasizing that practical recovery depends on the process and equipment. This receipt therefore keeps utilization caller-owned and fails closed if utilized recovered heat exceeds the qualified delivered heater duty.
The receipt does not size an exchanger or HRSG, predict temperature or pressure drop, perform pinch or heat-network analysis, establish availability, model operability, define a lifecycle boundary, select a market price, apply a carbon price, or establish dew-point or corrosion limits. Those decisions require independent engineering qualification.
Sources accessed 2026-09-27: