Where:
NOXcorr = Corrected NOX concentration (ppm).
NOXobs = Average measured NOX concentration for each run of the test (ppm).
Pr = Average annual atmospheric pressure (or average ozone season atmospheric pressure for a Subpart H unit that reports data only during the ozone season) at the nearest weather station (e.g., a standardized NOAA weather station located at the airport) for the year (or ozone season) prior to the year of the test (mm Hg).
Po = Observed atmospheric pressure during the test run (mm Hg).
Hr = Average annual atmospheric humidity ratio (or average ozone season humidity ratio for a Subpart H unit that reports data only during the ozone season) at the nearest weather station, for the year (or ozone season) prior to the year of the test (g H2O/g air).
Ho = Observed humidity ratio during the test run (g H2O/g air).
Tr = Average annual atmospheric temperature (or average ozone season atmospheric temperature for a Subpart H unit that reports data only during the ozone season) at the nearest weather station, for the year (or ozone season) prior to the year of the test (° K).
Ta = Observed atmospheric temperature during the test run (° K).
Where:
n = Number of unit operating hours in the quarter.
HIhr = Hourly heat input under paragraph (c)(3)(i)(A) of this section (mmBtu).
Where:
HIfuel-qtr = Quarterly total heat input from oil (mmBtu).
Mqtr = Mass of oil consumed during the quarter, determined as the product of the volume of oil under paragraph (c)(3)(ii)(B) of this section and the specific gravity under paragraph (c)(3)(ii)(D) of this section (lb).
GCVmax = Gross calorific value of oil, as determined under paragraph (c)(3)(ii)(C) of this section (Btu/lb)
106 = Conversion of Btu to mmBtu.
Where:
HIfuel-qtr = Quarterly heat input from gaseous fuel or fuel oil (mmBtu).
Qqtr = Volume of gaseous fuel or fuel oil combusted during the quarter, as determined under paragraph (c)(3)(ii)(B) of this section standard cubic feet (scf) or (gal), as applicable.
GCVmax = Gross calorific value of the gaseous fuel or fuel oil combusted during the quarter, as determined under paragraph (c)(3)(ii)(C) of this section (Btu/scf) or (Btu/gal), as applicable.
106 = Conversion of Btu to mmBtu.
Where:
MWqtr = Sum of all unit operating loads recorded during the quarter by the unit (MWh).
STfuel-qtr = Sum of all hourly steam loads recorded during the quarter by the unit (klb of steam/hr).
MW = Unit operating load for a particular unit operating hour (MWh).
ST = Unit steam load for a particular unit operating hour (klb of steam).
(Eq LM-7 for MW output)
(Eq LM-8 for steam output)
Where:
HIhr = Hourly heat input to the unit (mmBtu).
MWhr = Hourly operating load for the unit (MW).
SThr = Hourly steam load for the unit (klb of steam/hr).
(Eq LM-7a for MW output)
(Eq LM-8a for steam output)
Where:
HIhr = Hourly heat input to the individual unit (mmBtu).
MWhr = Hourly operating load for the individual unit (MW).
SThr = Hourly steam load for the individual unit (klb of steam/hr).
[SIGMA]MWqtr = Sum of the quarterly operating
all-units loads (from Eq. LM-5) for all units in the group (MW).
[SIGMA]STqtr = Sum of the quarterly steam
all-units loads (from Eq. LM-6) for all units in the group (klb of steam/hr)
WSO2 = EFSO2 * HIhr (Eq. LM-9)
Where:
WSO2 = Hourly SO2 mass emissions (lbs.)
EFSO2 = Either the SO2 emission factor from Table LM-1 of this section or the fuel-and-unit-specific SO2 emission rate from paragraph (c)(1)(i) of this section (lb/mmBtu).
HIhr = Either the maximum rated hourly heat input under paragraph (c)(3)(i)(A) of this section or the hourly heat input under paragraph (c)(3)(ii) of this section (mmBtu).
WNOX = EFNOX * HIhr (Eq. LM-10)
Where:
WNOX = Hourly NOX mass emissions (lbs).
EFNOX = Either the NOX emission factor from Table LM-2 of this section or the fuel- and unit-specific NOX emission rate determined under paragraph (c)(1)(iv) of this section (lb/mmBtu).
HIhr = Either the maximum rated hourly heat input from paragraph (c)(3)(i)(A) of this section or the hourly heat input as determined under paragraph (c)(3)(ii) of this section (mmBtu).
WCO2 = EFCO2 * HIhr (Eq. LM-11)
Where:
WCO2 = Hourly CO2 mass emissions (tons).
EFCO2 = Either the fuel-based CO2 emission factor from Table LM-3 of this section or the fuel-and-unit-specific CO2 emission rate from paragraph (c)(1)(iii) of this section (tons/mmBtu).
HIhr = Either the maximum rated hourly heat input from paragraph (c)(3)(i)(A) of this section or the hourly heat input as determined under paragraph (c)(3)(ii) of this section (mmBtu).
Table LM-1-SO2 Emission Factors (lb/mmBtu) for Various Fuel Types
Fuel type | SO2 emission factors |
Pipeline Natural Gas | 0.0006 lb/mmBtu. |
Other Natural Gas | 0.06 lb/mmBtu. |
Residual Oil | 2.1 lb/mmBtu. |
Diesel Fuel | 0.5 lb/mmBtu. |
Table LM-2-NOX Emission Rates (lb/mmBtu) for Various Boiler/Fuel Types
Unit type | Fuel type | NOX emission rate |
Turbine | Gas | 0.7 |
Turbine | Oil | 1.2 |
Boiler | Gas | 1.5 |
Boiler | Oil | 2 |
Table LM-3-CO2 Emission Factors (ton/mmBtu) for Gas and Oil
Fuel type | CO2 emission factors |
Pipeline (or other) Natural Gas | 0.059 ton/mmBtu. |
Oil | 0.081 ton/mmBtu. |
Table LM-4-Identical Unit Testing Requirements
Number of identical units in the group | Number of appendix E tests required |
2 | 1 |
3 to 6 | 2 |
7 | 3 |
[GREATER THAN]7 | n tests; where n = number of units divided by 3 and rounded to nearest integer. |
Table LM-5-Default Gross Calorific Values (GCVs) for Various Fuels
Fuel | GCV for use in equation LM-2 or LM-3 |
Pipeline Natural Gas | 1050 Btu/scf. |
Other Natural Gas | 1100 Btu/scf. |
Residual Oil | 19,700 Btu/lb or 167,500 Btu/gallon. |
Diesel Fuel | 20,500 Btu/lb or 151,700 Btu/gallon. |
Table LM-6-Default Specific Gravity Values for Fuel Oil
Fuel | Specific gravity (lb/gal) |
Residual Oil | 8.5 |
Diesel Fuel | 7.4 |
40 C.F.R. §75.19