Record Display for the EPA National Library Catalog
RECORD NUMBER: 678 OF 1923
|OLS Field Name||OLS Field Data|
|Main Title||Median life, annual activity, and load factor values for nonroad engine emissions modeling /|
|CORP Author||United States. Environmental Protection Agency. Office of Transportation and Air Quality. Assessment and Standards Division,|
|Publisher||United States Environmental Protection Agency,|
|Subjects||Combustion gases--Environmental aspects--United States--Computer simulation. ; Engines--Environmental aspects--United States--Computer simulation. ; Air--Pollution--United States--Forecasting. ; Combustion gases--Environmental aspects--United States--Forecasting.|
|Additional Subjects||Air pollution ; Exhaust emissions ; Mathematical models ; Inventories ; Automobile population|
|Collation||1 online resource ( pages) : charts|
EPAs NONROAD model computes emission inventories for nonroad engines. This report documents the default input values of median life, annual activity, and load factor for various types of nonroad engines. The model uses annual activity and load factor values to calculate yearly emissions for each engine type. In addition, the model uses activity and load factor, in combination with median life, to calculate the fleet age distributions for each engine type, as it projects future (or past) engine populations. Relative to the previous April 2004 version of this report, this version includes median life, activity, and load factor estimates for high performance sterndrive and inboard (SD/I) recreational marine engines. Also, beginning with NONROAD2005, the hydro power unit SCCs have been changed from 22xx005050 to 22xx006035, reflecting a reclassification from the farm to the commercial category.
Title from PDF title screen (viewed on December 12, 2013). "July 2010." "EPA-420-R-10-016." "NR-005d." Includes bibliographical references (pages 18-20).