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NORTRIP 2010-11-19

NORTRIP 2010-11-19. Cecilia Bennet Göran Blomqvist Mats Gustafsson. Pavements (D max = 11 mm, 50 km/h). PM 10 (mg/m 3 ). Nordic Ball Mill value. Multipel linear regression (road simulator). PM10 = 1,38NBM-0,087RH+2,9SP-0,00038 NBM = Nordic Ball Mill value RH = relative humidity

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NORTRIP 2010-11-19

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  1. NORTRIP 2010-11-19 Cecilia Bennet Göran Blomqvist Mats Gustafsson

  2. Pavements (Dmax = 11 mm, 50 km/h) PM10 (mg/m3) Nordic Ball Mill value

  3. Multipel linear regression (road simulator) PM10 = 1,38NBM-0,087RH+2,9SP-0,00038 NBM = Nordic Ball Mill value RH = relative humidity SP = stud protrusion

  4. Emission factors derived from road simulator studded unstudded summer

  5. Emission factors Source C Sink mg/m3 The road simulator in theory:

  6. : mg/m3

  7. Emission factors cont. The source is S=C(eq)*D [mg/m3/h] for this specific room. The speed of the four weels that simulates one car is v [km/h] The volume of the room is V [m3] Emission factor per vehicle km = C*D * V/v [mg/vehicle km] Note: D is sensitive to which data are used for the fitting. D differs for different speeds. S/D seems to differ for different RH. Roughtly, at 30 km/h EF=C(eq)*80

  8. CMA+ -- Source function -- Theoretical -- Measuredconcentration

  9. CMA+

  10. CMA+

  11. The RH ”problem”.

  12. Evaluation of street cleaners Dry Humid

  13. Passive IVL-filters and on-vehicle measurements of PM10

  14. Road surface moisture…

  15. Deposition on passive filters

  16. …plus mobile measurements…

  17. …plus road moisture 0-30mm

  18. Possible contributions • Emission factors • Pavement and tyre parameters • Ongoing development • RH? • Effects of measures • Dust binding (modelling the effect) • Street cleaning • Importance of surface humidity on gravel roads

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