You must calculate CO2 emissions according to paragraph (a) of this section, and calculate CH4 and N2O emissions according to paragraph (c) of this section.
where:
CO2 = Annual CO2 mass emissions for the specific fuel type (metric tons).
Fuel = Mass or volume of fuel combusted per year, from company records as defined in § 98.6 (express mass in short tons for solid fuel, volume in standard cubic feet for gaseous fuel, and volume in gallons for liquid fuel).
HHV = Default high heat value of the fuel, from Table C-1 of this subpart (mmBtu per mass or mmBtu per volume, as applicable).
EF = Fuel-specific default CO2 emission factor, from Table C-1 of this subpart (kg CO2/mmBtu).
1 * 10-3 = Conversion factor from kilograms to metric tons.
where:
CO2 = Annual CO2 mass emissions from natural gas combustion (metric tons).
Gas = Annual natural gas usage, from billing records (therms).
EF = Fuel-specific default CO2 emission factor for natural gas, from Table C-1 of this subpart (kg CO2/mmBtu).
0.1 = Conversion factor from therms to mmBtu
1 * 10-3 = Conversion factor from kilograms to metric tons.
where:
CO2 = Annual CO2 mass emissions from natural gas combustion (metric tons).
Gas = Annual natural gas usage, from billing records (mmBtu).
EF = Fuel-specific default CO2 emission factor for natural gas, from Table C-1 of this subpart (kg CO2/mmBtu).
1 * 10-3 = Conversion factor from kilograms to metric tons.
Where:
CO2 = Annual CO2 mass emissions for a specific fuel type (metric tons).
Fuel = Mass or volume of the fuel combusted during the year, from company records as defined in § 98.6 (express mass in short tons for solid fuel, volume in standard cubic feet for gaseous fuel, and volume in gallons for liquid fuel).
HHV = Annual average high heat value of the fuel (mmBtu per mass or volume). The average HHV shall be calculated according to the requirements of paragraph (a)(2)(ii) of this section.
EF = Fuel-specific default CO2 emission factor, from Table C-1 of this subpart (kg CO2/mmBtu).
1 * 10-3 = Conversion factor from kilograms to metric tons.
Where:
(HHV)annual = Weighted annual average high heat value of the fuel (mmBtu per mass or volume). [GREATER THAN]
(HHV)I = Measured high heat value of the fuel, for sample period "i" (which may be the arithmetic average of multiple determinations), or, if applicable, an appropriate substitute data value (mmBtu per mass or volume).
(Fuel)I = Mass or volume of the fuel combusted during the sample period "i," (e.g., monthly, quarterly, semi-annually, or by lot) from company records (express mass in short tons for solid fuel, volume in standard cubic feet (e.g., for gaseous fuel, and volume in gallons for liquid fuel).
n = Number of sample periods in the year.
Where:
CO2 = Annual CO2 mass emissions from MSW or solid fuel combustion (metric tons).
Steam = Total mass of steam generated by MSW or solid fuel combustion during the reporting year (lb steam).
B = Ratio of the boiler's maximum rated heat input capacity to its design rated steam output capacity (mmBtu/lb steam).
EF = Fuel-specific default CO2 emission factor, from Table C-1 of this subpart (kg CO2/mmBtu).
1 * 10-3 = Conversion factor from kilograms to metric tons.
Where:
CO2 = Annual CO2 mass emissions from the combustion of the specific solid fuel (metric tons).
Fuel = Annual mass of the solid fuel combusted, from company records as defined in § 98.6 (short tons).
CC = Annual average carbon content of the solid fuel (percent by weight, expressed as a decimal fraction, e.g., 95% = 0.95). The annual average carbon content shall be determined using the same procedures as specified for HHV in paragraph (a)(2)(ii) of this section.
44/12 = Ratio of molecular weights, CO2 to carbon.
0.91 = Conversion factor from short tons to metric tons.
Where:
CO2 = Annual CO2 mass emissions from the combustion of the specific liquid fuel (metric tons).
Fuel = Annual volume of the liquid fuel combusted (gallons). The volume of fuel combusted must be measured directly, using fuel flow meters calibrated according to § 98.3(i) . Fuel billing meters may be used for this purpose. Tank drop measurements may also be used.
CC = Annual average carbon content of the liquid fuel (kg C per gallon of fuel). The annual average carbon content shall be determined using the same procedures as specified for HHV in paragraph (a)(2)(ii) of this section.
44/12 = Ratio of molecular weights, CO2 to carbon.
0.001 = Conversion factor from kg to metric tons.
Where:
CO2 = Annual CO2 mass emissions from combustion of the specific gaseous fuel (metric tons).
Fuel = Annual volume of the gaseous fuel combusted (scf). The volume of fuel combusted must be measured directly, using fuel flow meters calibrated according to § 98.3(i) . Fuel billing meters may be used for this purpose.
CC = Annual average carbon content of the gaseous fuel (kg C per kg of fuel). The annual average carbon content shall be determined using the same procedures as specified for HHV in paragraph (a)(2)(ii) of this section.
MW = Annual average molecular weight of the gaseous fuel (kg/kg-mole). The annual average molecular weight shall be determined using the same procedures as specified for HHV in paragraph (a)(2)(ii) of this section.
MVC = Molar volume conversion factor at standard conditions, as defined in § 98.6 . Use 849.5 scf per kg mole if you select 68 °F as standard temperature and 836.6 scf per kg mole if you select 60 °F as standard temperature.
44/12 = Ratio of molecular weights, CO2 to carbon.
0.001 = Conversion factor from kg to metric tons.
Where:
CO2 = CO2 mass emission rate (metric tons/hr).
CCO2 = Hourly average CO2 concentration (% CO2).
Q = Hourly average stack gas volumetric flow rate (scfh).
5.18 * 10-7 = Conversion factor (metric tons/scf/% CO2).
where:
CO2* = Hourly CO2 mass emission rate, corrected for moisture (metric tons/hr).
CO2 = Hourly CO2 mass emission rate from Equation C-6 of this section, uncorrected (metric tons/hr).
%H2O = Hourly moisture percentage in the stack gas (measured or default value, as appropriate).
Where:
CH4 or N2O = Annual CH4 or N2O emissions from the combustion of a particular type of fuel (metric tons).
Fuel = Mass or volume of the fuel combusted, either from company records or directly measured by a fuel flow meter, as applicable (mass or volume per year).
HHV = Default high heat value of the fuel from Table C-1 of this subpart; alternatively, for Tier 3, if actual HHV data are available for the reporting year, you may average these data using the procedures specified in paragraph (a)(2)(ii) of this section, and use the average value in Equation C-8 (mmBtu per mass or volume).
EF = Fuel-specific default emission factor for CH4 or N2O, from Table C-2 of this subpart (kg CH4 or N2O per mmBtu).
1 * 10-3 = Conversion factor from kilograms to metric tons.
where:
CH4 or N2O = Annual CH4 or N2O emissions from the combustion of natural gas (metric tons).
Fuel = Annual natural gas usage, from gas billing records (therms).
EF = Fuel-specific default emission factor for CH4 or N2O, from Table C-2 of this subpart (kg CH4 or N2O per mmBtu).
0.1 = Conversion factor from therms to mmBtu
1 * 10-3 = Conversion factor from kilograms to metric tons.
= 1 * 10-3 * Fuel * EF (Eq. C-8b)
where:
CH4 or N2O = Annual CH4 or N2O emissions from the combustion of natural gas (metric tons).
Fuel = Annual natural gas usage, from gas billing records (mmBtu).
EF = Fuel-specific default emission factor for CH4 or N2O, from Table C-2 of this subpart (kg CH4 or N2O per mmBtu).
1 * 10-3 = Conversion factor from kilograms to metric tons.
Where:
CH4 or N2O = Annual CH4 or N2O emissions from the combustion of a particular type of fuel (metric tons).
Fuel = Mass or volume of the fuel combusted during the reporting year.
HHV = High heat value of the fuel, averaged for all valid measurements for the reporting year (mmBtu per mass or volume).
EF = Fuel-specific default emission factor for CH4 or N2O, from Table C-2 of this subpart (kg CH4 or N2O per mmBtu).
1 * 10-3 = Conversion factor from kilograms to metric tons.
Where:
CH4 or N2O = Annual CH4 or N2O emissions from the combustion of a solid fuel (metric tons).
Steam = Total mass of steam generated by solid fuel combustion during the reporting year (lb steam).
B = Ratio of the boiler's maximum rated heat input capacity to its design rated steam output (mmBtu/lb steam).
EF = Fuel-specific emission factor for CH4 or N2O, from Table C-2 of this subpart (kg CH4 or N2O per mmBtu).
1 * 10-3 = Conversion factor from kilograms to metric tons.
Where:
CH4 or N2O = Annual CH4 or N2O emissions from the combustion of a particular type of fuel (metric tons).
(HI)A = Cumulative annual heat input from combustion of the fuel (mmBtu).
EF = Fuel-specific emission factor for CH4 or N2O, from Table C-2 of this section (kg CH4 or N2O per mmBtu).
0.001 = Conversion factor from kg to metric tons.
Where:
CO2 = CO2 emitted from sorbent for the reporting year (metric tons).
S = Limestone or other sorbent used in the reporting year, from company records (short tons).
R = The number of moles of CO2 released upon capture of one mole of the acid gas species being removed (R = 1.00 when the sorbent is CaCO3 and the targeted acid gas species is SO2).
MWCO2 = Molecular weight of carbon dioxide (44).
MWS = Molecular weight of sorbent (100 if calcium carbonate).
0.91 = Conversion factor from short tons to metric tons.
Where:
VCO2h = Hourly volume of CO2 emitted (scf).
(%CO2)h = Hourly average CO2 concentration, measured by the CO2 concentration monitor, or, if applicable, calculated from the hourly average O2 concentration (%CO2).
Qh = Hourly average stack gas volumetric flow rate, measured by the stack gas volumetric flow rate monitor (scfh).
th = Source operating time (decimal fraction of the hour during which the source combusts fuel, i.e., 1.0 for a full operating hour, 0.5 for 30 minutes of operation, etc.).
100 = Conversion factor from percent to a decimal fraction.
Where:
Vff = Annual volume of CO2 emitted from combustion of a particular fossil fuel (scf).
Fuel = Total quantity of the fossil fuel combusted in the reporting year, from company records, as defined in § 98.6 (lb for solid fuel, gallons for liquid fuel, and scf for gaseous fuel).
Fc = Fuel-specific carbon based F-factor, either a default value from Table 1 in section 3.3.5 of appendix F to part 75 of this chapter, or a site-specific value determined under section 3.3.6 of appendix F to part 75 (scf CO2/mmBtu).
HHV = High heat value of the fossil fuel, from fuel sampling and analysis (annual average value in Btu/lb for solid fuel, Btu/gal for liquid fuel and Btu/scf for gaseous fuel, sampled as specified (e.g., monthly, quarterly, semi-annually, or by lot) in § 98.34(a)(2) ). The average HHV shall be calculated according to the requirements of paragraph (a)(2)(ii) of this section.
106 = Conversion factor, Btu per mmBtu.
Where:
(Fuel)p = Quantity of biomass consumed during the measurement period "p" (tons/year or tons/month, as applicable).
H = Average enthalpy of the boiler steam for the measurement period (Btu/lb).
S = Total boiler steam production for the measurement period (lb/month or lb/year, as applicable).
(HI)nb = Heat input from co-fired fossil fuels and non-biomass-derived fuels for the measurement period, based on company records of fuel usage and default or measured HHV values (Btu/month or Btu/year, as applicable).
(HHV)bio = Default or measured high heat value of the biomass fuel (Btu/lb).
(Eff)bio = Percent efficiency of biomass-to-energy conversion, expressed as a decimal fraction.
2000 = Conversion factor (lb/ton).
= 0.001 * (HI)A* EF (Eq. C-15a)
where:
CO2 = Annual CO2 mass emissions from the combustion of a particular type of biomass fuel listed in Table C-1 (metric tons)
(HI)A = Annual heat input from the biomass fuel, obtained, where feasible, from the electronic emissions reports required under § 75.64 of this chapter. Where this is not feasible use best available information, as described in §§ 98.33(c)(4)(ii)(C) and (c)(4)(ii)(D) (mmBtu)
EF = CO2 emission factor for the biomass fuel, from Table C-1 (kg CO2/mmBtu)
0.001 = Conversion factor from kg to metric tons
40 C.F.R. §98.33