E8500 Instruction & Operations Manual
version 1.017
Page 3 of 49
LIST OF ABBREVIATIONS
PARAMETERS
AIR
Excess air
CO
Carbon monoxide (a toxic gas)
CO
2
Carbon dioxide – NDIR measurement OR calculated from O
2
DFT
Draft/Pressure
DUTY
Duty cycle is a power setting given in percent
EFF
Combustion efficiency (for boilers and furnaces, does not apply to
engines)
HC
Hydrocarbons (NDIR) measurement – (HC is same as CxHy)
H
2
S
Hydrogen Sulfide (a toxic gas)
N.A.
Parameter not available
NO
Nitric oxide (a toxic gas)
NO
2
Nitrogen dioxide (a toxic gas)
NO
X
Oxides of nitrogen (a toxic mixture of NO & NO
2
gases)
O
2
REF
Oxygen reference basis for correction of toxic gas concentrations
SO
2
Sulfur dioxide (a toxic gas)
Ta
Ambient (room) temperature
Tp
Preheated Air temperature
Tg
Gas temperature
THERMAL EFF
Engine thermal efficiency (heat loss method of calculation, not the
same as combustion efficiency)
VEL
Stack Gas Velocity
VOC
Volatile Organic Compounds
UNITS
CFM
Cubic feet per minute, (volumetric stack gas flow-rate)
CMM
Cubic meters per minute, (volumetric stack gas flow-rate)
FPS
Feet per second (stack gas velocity measurement)
MPS
Meters per second (stack gas velocity measurement)
#/H
Pounds (of pollutant) per hour (mass emissions)
T/D
Tons per day (mass emissions)
PPM
Parts (of pollutant) per million (volume basis-dry)
MGM
Milligrams (of pollutant) per cubic meter
GBH
Grams (of pollutant) per (engine) brake horsepower-hour.
#/B
Pounds (of pollutant) per million BTU (of fuel).
"WC
Inches of water (draft/pressure measurement)
mmWC
Millimeters of water (draft/pressure measurement)
kPa
KiloPascals (draft/pressure measurement)
mbar
Millibars (draft/pressure measurement)
%
Percent by volume, dry-basis
in2
Square inches (cross sectional area of stack)
