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NO x Emission factors in OSPM Wind speed profiles in street canyons

NO x Emission factors in OSPM Wind speed profiles in street canyons. NORTRIP – Helsinki meeting 2. May 2012 Matthias Ketzel Department of Environmental Science (former NERI), Aarhus University, Denmark. Right Emission Factors for NOx ?!.

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NO x Emission factors in OSPM Wind speed profiles in street canyons

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  1. NOx Emission factors in OSPMWind speed profiles in street canyons NORTRIP – Helsinki meeting 2. May 2012 Matthias Ketzel Department of Environmental Science (former NERI), Aarhus University, Denmark

  2. Right Emission Factors for NOx ?! Calculated hourly NOx concentrations from Hornsgatan in Stockholm for the time period 1July 2008 to 31 Dec 2009 using OSPM. Calculations based on a constant emissionfactor for NOx.

  3. OSPM runs for HCAB, Copenhagen 0.7 g/km observed Copert EF, fRoof=0.82 background

  4. More on Validation of OSPM • using COPERT 4 emission factors • factor fRoof = u_Roof / u_Mast = 0.4

  5. 10 ”Blind Test” Application of OSPM for many locations in DK • Selection of 10 streetsin Copenhagen • 5 weeks campaign using passive samplers for NO2

  6. 10 ”Blind Test” Application of OSPM for many locations in DK buildings only on one side

  7. Sydhavnsgade(South Harbour Street) 20 000 veh / day 20 000 – 30 000 veh/d 49 000 veh / day

  8. 10 ”Blind Test” Application of OSPM for many locations in DK

  9. factor fRoof = u_Roof / u_Mast • 0.82 before • 0.4 now

  10. Hornsgatan

  11. CFD (MISKAM) calculations, WD=90

  12. WD=120

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