Presents/slides/alison/awmapaper1.ppt Alison K. Pollack ENVIRON International Corporation Novato, California Rich Wilcox U.S. Environmental Protection.

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Presentation transcript:

Presents/slides/alison/awmapaper1.ppt Alison K. Pollack ENVIRON International Corporation Novato, California Rich Wilcox U.S. Environmental Protection Agency Ann Arbor, Michigan Presented at Emission Inventory: Living in a Global Environment December, 1998 New Orleans, Louisiana EPA’s NEW NONROAD MOBILE EMISSIONS MODEL

Presents/slides/alison/awmapaper1.ppt Overview History and timetable General description and structure Example of model setup and view Revisions in progress Staying informed

Presents/slides/alison/awmapaper1.ppt Model History and Timetable Former EPA guidance: NEVES, 1991 Draft NONROAD model release and Public Workshop, June day comment periods for all supporting technical documents Model updates posted on the Web, July and September 1998 Draft final model to be released Spring 1999 –30 day (minimum) comment period on form/function and any significant revisions from draft release Final model to be released second half 1999 Later releases with new features

Presents/slides/alison/awmapaper1.ppt Inventory News NONROAD vs. NEVES –National Inventory VOC +25% NOx +25% PM Down -5%

Presents/slides/alison/awmapaper1.ppt Equipment Types Airport ground support Agricultural equipment Construction equipment Industrial and commercial equipment Recreational vehicles Residential and commercial lawn and garden equipment Logging equipment Recreational marine vessels Underground mining equipment Oil field equipment

Presents/slides/alison/awmapaper1.ppt Emissions Estimates to be Added in Later Model Version Commercial marine Locomotive Aircraft

Presents/slides/alison/awmapaper1.ppt Pollutants Reported Exhaust  HC  NO X  CO  CO 2  SO X  PM Non-exhaust HC by mode  Diurnal  Refueling  Crankcase

Presents/slides/alison/awmapaper1.ppt Geographic Coverage National –50 states –U.S. total State County Sub-county Non-attainment areas

Presents/slides/alison/awmapaper1.ppt Temporal Coverage Past, present, future year emissions Annual, seasonal, monthly, or daily emissions Daily emissions distinguished by season and weekday/weekend

Presents/slides/alison/awmapaper1.ppt Model Structure Graphical User Interface (Visual Basic) Core Model (Fortran) Reporting Utility (Microsoft Access)

Presents/slides/alison/awmapaper1.ppt Graphical User Interface Example Screen

Presents/slides/alison/awmapaper1.ppt Graphical User Interface Example Screen

Presents/slides/alison/awmapaper1.ppt Graphical User Interface Example Screen

Presents/slides/alison/awmapaper1.ppt Reporting Utility Example Screen

Presents/slides/alison/awmapaper1.ppt Reporting Utility Example Screen

Presents/slides/alison/awmapaper1.ppt Reporting Utility Standardized Reports Emissions totals by: –County –Major Source Classification –Equipment Type/Code –Horsepower Population and Fuel Consumption by SCC and HP Comparison of Emissions by: –Major Source Classification –SCC –Horsepower Comparison of Population and Fuel Consumption by SCC

Presents/slides/alison/awmapaper1.ppt General Calculation Multiply: –Equipment population –Average load factor –Activity in hours of use per year –Emission factor with deterioration and/or new standards –Average power level Temporally and geographically allocate emissions

Presents/slides/alison/awmapaper1.ppt Model Inputs (defaults provided) Emission factors Emission deterioration factors Activity, load factors, and median engine life Base year equipment populations Growth factors indicators Scrappage function Geographic allocation indicators Temporal allocation factors

Presents/slides/alison/awmapaper1.ppt Model Documentation Technical support documents on the Web User’s Guide on the Web

Presents/slides/alison/awmapaper1.ppt Major Revisions from Draft to Draft Final Graphical User Interface –Error checking of inputs –RU now runs directly from GUI Core model –Model Speed up –Revised refueling emissions –Tank size based on average tank volume rather than gal/hp

Presents/slides/alison/awmapaper1.ppt Major Revisions from Draft to Draft Final (continued) Reporting Utility –All emissions reports by fuel type –Refueling vapor displacement and spillage reported separately –Hot soak, resting and running losses no longer reported –Additional reports

Presents/slides/alison/awmapaper1.ppt Major Revisions from Draft to Draft Final (continued) Default model inputs –Linear instead of exponential growth in populations –Revised geographic allocation indicators –GSE populations based on aircraft LTO data –Revised recreational marine inputs annual activity median lifetime –Revised engine populations 4-stroke motorcycles, ATVs, and lawnmowers 2-stroke chainsaws, trimmers, and leafblowers snowmobiles

Presents/slides/alison/awmapaper1.ppt Major Revisions from Draft to Draft Final (concluded) Default model inputs (concluded) –Revised emission factors small spark ignition engines large spark ignition engines –Revised emission standard phase-in schedules compression ignition engines small spark ignition engines –Revised NOx deterioration factors inboard recreational marine small spark ignition engines

Presents/slides/alison/awmapaper1.ppt To Stay Informed: Electronic Information Sources Web site – MOBILE list server