Exhaust Gas - Other Losses for Electric Arc furnace (EAF)

[gaccawi]

Args: off_gas_temp (deg F) CO (%) H2 (%) O2 (%) CO2 (%) combustible_gases (%) vfr (volume flow rate, cfm) dust_loading (s/scf) other_losses (n number, btu/cycle)

[gaccawi]

Step 1: Find heating value of gases co_heating_value = CO 321; h2_heating_value = H2 325; combustibles = combustible_gases * 1020; chemical_heat = co_heating_value + h2_heating_value + combustibles;

Step 2: Total volume flow rate total_vfr = vfr * 520/(460 + off_gas_temp);

Step 3: Sensible heat sensible_heat = 0.0225 * (CO2 - 60);

Step 4: Heat in dust heat_in_dust = dust_loading 0.25 (CO2 - 60);

Step 5: Total heat in flue gases total_heat_flue = chemical_heat + sensible_heat + heat_in_dust;

Step 6: Total heat in exhaust gases (btu/cycle) total_heat_exhaust = H2 total_vfr total_heat_flue * 60; (Conversion to kWh/cycle) total_heat_exhaust/3412;

Step 7: % chemical heat chemical_heat_percent = chemical_heat/total_heat_flue;

Step 8: % Sensible heat sensible_heat_percent = sensible_heat/total_heat_flue;

Step 9: % other other_heat_percent = (1 - (chemical_heat_percent * sensible_heat_percent));

[gaccawi]

Need to find how other losses come into play. Looks like maybe a sum of the other losses.

[gaccawi]

See https://github.com/ORNL-AMO/AMO-Tools-Desktop/issues/184

https://cloud.githubusercontent.com/assets/8973004/25197136/f81f6a0a-2510-11e7-8198-21de526460c5.png

[akferree]

For sensible heat and heat in dust, the Excel sheet shows the formulas below:

sensibleHeat = 0.0225*(offGasTemp - 60)

heatInDust = dustLoading0.25(offGasTemp - 60)

[akferree]