(C) Operators of facilities where currently installed on-line instrumentation provides a measure of lower heating value (LHV) but not higher heating value (HHV), shall convert LHVs (Btu/scf) to HHVs (Btu/scf) in the following manner.
HHV = LHV * CF Where: HHV = fuel or fuel mixture higher heating value (Btu/scf) LHV = fuel or fuel mixture lower heating value (Btu/scf) CF = conversion factor
For natural gas, operators shall use a CF of 1.11. For refinery fuel gas and mixtures of refinery fuel gas, operators shall derive a fuel system specific CF. A weekly average CF shall be determined from either concurrent LHV instrumentation measurements and HHV determined as part of the daily carbon content determination, either by on-line instrumentation or laboratory analysis, or by the HHV/LHV ratio obtained from the laboratory analysis of the daily samples.
Method for Calculating CO2 emissions from Fuel Combustion Using Measured Carbon Content - For each type of fuel combusted at the facility, the operator shall calculate CO2 emissions using the appropriate method below:
(A) Operators combusting solid fuels shall use the following equation to calculate CO2 emissions:
12 CO2 = ∑ Fueln * CCn * 3.664 1 Where: CO2 = carbon dioxide emissions, metric tonnes per year Fueln = mass of fuel combusted in month “n,” metric tonnes CCn = carbon content from fuel analysis for month “n,” percent
g. 95% expressed as 0.95)
= conversion factor for carbon to carbon dioxide
The carbon content of all solid fuels shall be measured and recorded monthly. The monthly solid fuel sample shall be a composite sample of weekly samples. The solid fuel shall be sampled at a location after all fuel treatment operations and the samples shall be representative of the fuel chemical characteristics combusted during the sample week. Each weekly sub-sample shall be collected at a time (day and hour) of the week when the fuel consumption rate is representative and