1 / 31

Instruction on AERSCREEN

Instruction on AERSCREEN. ——A screening mode for AERMOD. Jun Wang 03/24/2011. A Brief Outline. AERMOD/AERSCREEN history AERSCREEN overview AERSCREEN features Installation User interface Example run. AERMOD/AERSCREEN History. AERMOD

hyman
Télécharger la présentation

Instruction on AERSCREEN

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Instruction on AERSCREEN ——A screening mode for AERMOD Jun Wang 03/24/2011

  2. A Brief Outline • AERMOD/AERSCREEN history • AERSCREEN overview • AERSCREEN features • Installation • User interface • Example run AERSCREEN Tutorial

  3. AERMOD/AERSCREEN History • AERMOD • Initially developed in 1991, release in 2000, adopted in 2005. • Point, area, volume Sources • Simple or complex terrain • Transport distance up to 50 km • SCREEN option added to AERMOD in 1995 forces model to calculate centerline concentration for each source/receptor/meteorology combination. AERSCREEN Tutorial

  4. AERMOD/AERSCREEN History • AERSCREEN • Initially developed by Jim Haywood, Michigan DEQ • Draft submitted to EPA 4/25/06 (Alpha) • Release to public (Beta) • Latest version 11076 was released on 03/17/11 • MAKEMET, BPIPPRM and AERMAP to generate necessary AERMOD inputs. AERSCREEN Tutorial

  5. Overview of AERSCREEN • MAKEMET program generates matrix of meteorological conditions based on user-specified surface characteristics, formatted for input to AERMOD (.sfc and .pfl files) AERSCREEN Tutorial

  6. Overview of AERSCREEN • Components of AERSCREEN • AERSCREEN main program • MAKEMET • BPIPPRPM • AERMAP • Running screen mode in two ways • Run AERSCREEN alone • Run AERMOD with screening option based on MAKMET Will the two results same? Comparing to SCREEN3 AERSCREEN Tutorial

  7. Overview of AERSCREEN • Source type: • Single point source(vertical uncapped stack) • Capped stack • Horizontal stack • Rectangular area or circular area • Flare • Volume source • Routine to find maximum concentration for automatic receptor distances AERSCREEN Tutorial

  8. Overview of AERSCREEN • Data entered via prompts or by input file • No deposition • MAKEMET meteorology • Internal matrices of other meteorological parameters AERSCREEN Tutorial

  9. Overview of AERSCREEN • Data required • Source parameters • Building downwash parameters • NOX to NO2 conversion • AERMAP (Terrain heights) • MAKEMET • Ambient minimum and maximum temperatures • Minimum wind speed and anemometer height • Surface characteristic (albedo, Bowen ratio, roughness) • Probe distance • Urban(population)/Rural • Flagpole receptor or discrete receptor (up to 10) AERSCREEN Tutorial

  10. Overview of AERSCREEN • DEM File • Suggest use AERMOD view to generate *.DEM file • Download from AERMOD view, find it at cache file folder • Create demlist.txt AERSCREEN Tutorial

  11. Overview of AERSCREEN • Discrete receptor file • A txt file Discrete receptors can be up to 10. AERSCREEN Tutorial

  12. Overview of AERSCREEN • Average time factor • Based on the upper bound of SCREEN3 • No annually average for area source AERSCREEN Tutorial

  13. Overview of AERSCREEN James Thurman, 2006 AERSCREEN Tutorial

  14. Overview of AERSCREEN • MAKEMET • Default value: min wind speed 0.5 m/s Anemometer height 10 m Single wind direction 270 deg • User-specified surface characteristics – albedo, Bowen ratio, and surface roughness • Use seasonally varying surface characteristics for generic land use classifications. (AERSURFACE) • Input an external file (AERMET Stage 3) AERSCREEN Tutorial

  15. Overview of AERSCREEN • MAKEMET • Looping through • Wind speeds • Cloud covers • Ambient temperatures • Solar elevation angles • Convective velocity scales • Result • Friction velocity (U*) • Monin-Obukhov length (L) • Zim • Zic and w* for convective case AERSCREEN Tutorial

  16. AERSCREEN Features • All the input will go to AERSCREEN.INP • No necessary building downwash for area and volume source. • Zero or negative stack temperature will treat as temperature difference AERSCREEN Tutorial

  17. AERSCREEN Features • Point, capped stacks and horizontal stack sources • Emission rate (lb/hr or g/s) • Stack height (feet or meters) • Stack diameter (inches or meters) • Stack temperature (degrees Fahrenheit or Kelvin) • Stack velocity (ft/s or m/s) or flow rate (ACFM) AERSCREEN Tutorial

  18. AERSCREEN Features • Flare source • Emission rate (lb/hr or g/s) • Stack height (feet or meters) • Total heat release rate (cal/sec) • Radiative heat loss fraction AERSCREEN Tutorial

  19. AERSCREEN Features • Volume source • Emission rate (lb/hr or g/s) • Release height, i.e. center of volume (feet or meters) • Initial lateral dimension of the volume (feet or meters) • Initial vertical dimension of the volume (feet or meters) AERSCREEN Tutorial

  20. AERSCREEN Features • Rectangular/Circular area source • Emission rate (lb/hr or g/s) • Release height above ground (feet or meters) • Long and short dimensions of area (feet or meters) orRadius of circle (feet or meters) • Initial vertical dimension of plume (feet or meters) AERSCREEN Tutorial

  21. AERSCREEN Features • NOx to NO2 conversion • Ozone Limiting Method (OLM) • Plume Volume Molar Ratio Method (PVMRM) • Input • NOx/NO2 in stack ratio • Background ozone concentration AERSCREEN Tutorial

  22. AERSCREEN Features • Building downwash • Building height (feet or meters) • Maximum building horizontal dimension (feet or meters) • Minimum building horizontal dimension (feet or meters) • Degrees from North of maximum building horizontal dimension (0-179 degrees) • Degrees from North of stack location relative to building center (0-360 degrees) • Distance between stack and building center (feet or meters) AERSCREEN Tutorial

  23. AERSCREEN Features AERSCREEN Tutorial

  24. AERSCREEN Features • Meteorology and surface characteristics • Minimum and maximum ambient air temperatures (Fahrenheit or Kelvin) • Minimum wind speed (m/s) • Anemometer height (m) • Surface characteristics type (user-entered, AERMET tables, or surface characteristics listed in an external file) AERSCREEN Tutorial

  25. AERSCREEN Features • Terrain • Probe distance (meters) • Discrete receptor distances • Flagpole receptors • Source elevation or use AERMAP to determine source elevation • Source coordinates (geographic or UTM) • NAD datum (NAD 27 or 83) • UTM zone • Urban/Rual • Minimum ambient distance AERSCREEN Tutorial

  26. AERSCREEN Features • Output • AERSCREEN.OUT • max_conc_distance.txt, AERSCREEN Tutorial

  27. Installation • Download from • http://www.epa.gov/scram001/dispersion_screening.htm • Extract AERSCREEN, MAKEMET, AERMOD, AERMAP, BPIPRPM in same directory • Or simply download from • http://plaza.ufl.edu/j.wang/aerscreen.zip • Extract and go AERSCREEN Tutorial

  28. User interface • Windows interface available • $370~$450 AERSCREEN Tutorial

  29. Example run • See handout and screen. AERSCREEN Tutorial

  30. Summary • What is the component of AERMOD family? (except AERMOD itself) AERSCREEN Tutorial

  31. Thanks! AERSCREEN Tutorial

More Related