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Examination of PN emissions and size distributions of a hybrid city bus under real world urban driving conditions

  • S. SoyluEmail author
Article

Abstract

Engine load-speed frequency map of a hybrid city bus, which operates on the routes of Sakarya Municipality, was compared with that of European Transient Cycle (ETC) and World Harmonized Transient Cycle (WHTC), which are the certification test cycles. It was observed that the hybrid city bus engine operates mostly at three main regions, which are idling (30% load and 750 rpm), motoring (0% load and 1200 rpm) and high load (80% load and 1800 rpm) conditions under real world urban driving conditions. However, engine load-speed frequency maps of the certification test cycles are significantly different and cannot represent the real world urban driving conditions of the hybrid city bus. Therefore, the Particle Number (PN) emissions of the hybrid city bus were investigated under real world urban driving conditions. The aims of work were to examine the effects of city bus hybridization on the particle emissions and develop PN emission factors. The PN concentrations and size distributions together with engine operating conditions were measured with a Particle Measurement Program (PMP) compliant system, which involves a condensation particle counter (CPC) and a particle sizer (EEPS). The measurements under real world urban driving conditions indicated that the emission factors of the hybrid city bus for the PN and Total PN are 8.99E+12 and 2.51E+13 #/kW-h, respectively. The PN size distribution measurements indicated that the particles up to approximately 20 nm are not very sensitive to changes in engine power and they are exist even during motoring conditions. But, the particles in the size range from 20 to 200 nm are very sensitive to sudden changes of the engine power.

Key Words

Particle number Emission factor Hybrid bus City bus Real world emissions Urban driving Diesel engine 

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References

  1. Adar., S. D., Davey, M., Sullivan, J. R., Compher, M., Szpiro, A. and Liu, L. (2008). Predicting airborne particle levels aboard Washington State school buses. Atmospheric Environment, 42, 7590–7599.CrossRefGoogle Scholar
  2. Alvarez, R., Weilenmann, M. and Novak, P. (2008). Pollutant emissions from vehicles with regenerating after-treatment systems in regulatory and real-world driving cycles. Science of the Total Environment, 398, 87–95.CrossRefGoogle Scholar
  3. Andersson, J., Mamakos, A., Giechaskiel, B., Carriero, M. and Martini, G. (2010). Particle Measurement Programme (PMP) Heavy-duty Inter-laboratory Correlation Exercise (ILCE_HD) Final Report. EC-JRC Scientific and Technical Reports.Google Scholar
  4. Briggs, D. J., de Hoogh, K., Morris, C. and Gulliver, J. (2007). Effects of travel mode on exposure to particulate pollution. Environment Int., 34, 12–22.CrossRefGoogle Scholar
  5. Cocker, D. R., Shah, S. D., Johnson, K., Miller, J. W. and Norbeck, J. M. (2004). Development and application of a mobile laboratory for measuring emissions from diesel engines. 1. Regulated gaseous emissions. Environmental Science & Technology, 38, 2182–2189.CrossRefGoogle Scholar
  6. Chandler, K. and Walkowicz, K. (2006). King County Metro Transit Hybrid Articulated Buses: Final Evaluation Results. Technical Report NREL/TP-540-40585, USA.Google Scholar
  7. Durbin, T. D., Johnson, K., Cocker, D. R. and Miller, J. W. (2007). Evaluation and comparison of portable emissions measurement systems and federal reference methods for emissions from a back-up generator and a diesel truck operated on a chassis dynamometer. Environmental Science & Technology, 41, 6199–6204.CrossRefGoogle Scholar
  8. EC Regulation (2009). No 595/2009 of the European Parliament and of the Council. Official J. European Union.Google Scholar
  9. Erlandsson, L., Almen, J. and Johansson, H. (2008). Measurement of emissions from heavy duty vehicles meeting Euro IV/V emission levels by using on-board measurement in real life operation. 16th Int. Symp. “Transport and Air Pollution”, Graz.Google Scholar
  10. EPA Regulation (2008). In-Use Testing for Heavy-Duty Diesel Engines and Vehicles; Emission Measurement Accuracy Margins for Portable Emission Measurement Systems and Program Revisions. EPA, 40 CFR Part 86, Federal Register 73, 50 / Rules and Regulations.Google Scholar
  11. Giechaskiel, B., Mamakos, A., Andersson, J., Dilara, P., Martini, G., Schindler, W. and Bergmann, A. (2012). Measurement of automotive nonvolatile particle number emissions within the European legislative framework: A review. Aerosol Science and Technology 46,7, 719–749.CrossRefGoogle Scholar
  12. Haibo, Z., Frey, H. C. and Rouphail, N. M. (2008). A vehicle-specific power approach to speed- and facilityspecific emissions estimates for diesel transit buses. Environmental Science & Technology, 42, 7985–7991.CrossRefGoogle Scholar
  13. Hess, D. B., Ray, P. D., Stinson, A. E. and Park, J. (2010). Determinants of exposure to fine particulate matter (PM2.5) for waiting passengers at bus stops. Atmospheric Environment, 44, 5174–5182.CrossRefGoogle Scholar
  14. HEI (2010). Traffic Related Air Pollution: A Critical Review of the Literature on Emissions, Exposure, and Health Effects. Health Effects Institute, Boston, MA. Special Report 17.Google Scholar
  15. Johnson, K. C., Durbin, T. D., Cocker, D. R., Miller, W. J., Bishnu, J. K., Maldonado, H., Moynahan, N., Ensfield, C. and Laroo, C. A. (2009). On-road comparison of a portable emission measurement system with a mobile reference laboratory for a heavy-duty diesel vehicle. Atmospheric Environment, 43, 2877–2883.CrossRefGoogle Scholar
  16. Kamarianakis, Y., Gao, H. O., Holmen, B. A. and Sonntag, D. B. (2011). Robust modeling and forecasting of diesel particle number emissions rates. Transportation Research Part D, 16, 435–443.CrossRefGoogle Scholar
  17. Kim, H., Lee, S., Kim, J., Cho, G., Sung, N. and Jeong, Y. (2005). Measurement of size distribution of diesel particles: Effects of instruments, dilution methods, and measuring positions. Int. J. Automotive Technology 6,2, 119–124.zbMATHGoogle Scholar
  18. Kittelson, D. B., Watts, W. F., Johnson, J. P., Rowntree, C., Payne, M., Goodier, S., Warrens, C., Preston, H., Zink, U., Ortiz, M., Goersmann, C., Twigg, M. V., Walker, A. P. and Caldow, R. (2006a). On-road evaluation of two diesel exhaust aftertreatment devices. J. Aerosol Science, 37, 1140–1151.CrossRefGoogle Scholar
  19. Kittelson, D. B., Watts, W. F. and Johnson, J. P. (2006b). On-road and laboratory evaluation of combustion aerosols—Part 1: Summary of diesel engine results. J. Aerosol Science, 37, 913–930.CrossRefGoogle Scholar
  20. Lee, S., Cho, Y., Song, M., Kim, H., Park, J. and Baik, D. (2012). Experimental study on the characteristics of nano-particle emissions from a heavy-duty diesel engine using a urea-scr system. Int. J. Automotive Technology 13,3, 355–363.CrossRefGoogle Scholar
  21. Ma, H., Jung, H. and Kittelson, D. B. (2008). Investigation of diesel nanoparticle nucleation mechanisms. Aerosol Science and Technology, 42, 335–342.CrossRefGoogle Scholar
  22. Myung, C. L. and Park, S. (2012). Exhaust nanoparticle emissions from internal combustion engines: A review. Int. J. Automotive Technology 13,1, 9–22.CrossRefGoogle Scholar
  23. Semercioglu, H. and Soylu, S. (2012). Examination of fuel economy and NOx emissions of a hybrid city bus under real world urban driving conditions. OTEKON 2012, 6. Automotive Technologies Cong., Bursa.Google Scholar
  24. Semercioglu, H., Bal, A. and Soylu, S. (2010). Examination of real world operating conditions and emissions of a hybrid city bus. ICAT 2010, 5th Int. Conf. Energy and Automotive Technologies, Istanbul.Google Scholar
  25. Soylu, S. (2012a). Real world PN emissions from a hybrid city bus under urban driving conditions. 19th Int. Transport and Air Pollution Conf. 2012, Thessaloniki, Greece.Google Scholar
  26. Soylu, S. (2012b) Examination of PN emissions of a hybrid city bus under real world urban driving conditions. Poster presentation, 16th ETH Conf. Combustion Generated Nanoparticles, Zurich.Google Scholar
  27. Soylu, S., Bal, A., Semercioglu, H. and Ay, E. F. (2010). Examination of Urban City Bus Operating Conditions and Emissions. Urban Transport and Hybrid Vehicles. Soylu, S. edn. Sciyo. Croatia.Google Scholar
  28. Stanek, L. W., Sacks, J. D., Dutton, S. J. and Dubois, J. Croatia, B. (2011). Attributing health effects to apportioned components and sources of particulate matter: An evaluation of collective results. Atmospheric Environment, 45, 5655–5663.CrossRefGoogle Scholar
  29. TERM (2004). Indicators Tracking Transport and Environment in the European Union. EEA Report 3/2004. Copenhagen.Google Scholar
  30. TERM (2007). Indicators Tracking Transport and Environment in the European Union. EEA Report 1/2008. Copenhagen.Google Scholar
  31. TERM (2011). Transport Indicators Tracking Progress towards Environmental Targets in EUROPE. EEA Report 7/2011. Copenhagen.Google Scholar
  32. Zheng, Z., Johnson, K. C., Liua, Z., Durbin, T. D., Hub, S., Huai, T., Kittelson, D. B. and Jung, H. S. (2011). Investigation of solid particle number measurement: Existence and nature of sub-23 nm particles under PMP methodology. J. Aerosol Science, 42, 883–897.CrossRefGoogle Scholar
  33. Zhihua, L., Ge, Y., Johnson, K. C., Shah, A. N., Tan, J., Wang, C. and Yu, L. (2011). Real-world operation conditions and on-road emissions of Beijing diesel buses measured by using portable emission measurement system and electric low-pressure impactor. Science of the Total Environment, 409, 1476–1480.CrossRefGoogle Scholar

Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Faculty of Engineering, Department of Environmental EngineeringSakarya UniversitySakaryaTurkey

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