Investigations of the Effect of Humid Air on NOX & PM Emissions of a CNG Engine

Details

• Creators:
  Rahai, Hamid R.
• Corporate Creators:
  California State University, Long Beach. Center for Energy and Environmental Research and Services (CEERS) ; METRANS Transportation Center (Calif.)
• Corporate Contributors:
  California. Department of Transportation
• Subject/TRT Terms:
  • Carbon dioxide
  • Compressed natural gas
  • Exhaust gases
  • Humidity
  • Mathematical models
  • Natural gas vehicles
  • Nitrogen oxides
  • Particulates
  • Simulation
  • Greenhouse Gas (GHG) emissions
  More +
• Publication/ Report Number:
  CA16-2932
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  8/15/15 - 9/1/16
• Corporate Publisher:
  METRANS Transportation Center (Calif.)
• Abstract:
  Numerical and experimental investigations of the effect of a humid air system on nitrogen oxides (NOx) and Particulate Matter (PM) emissions of a compressed natural gas (CNG) engine have been performed. For the numerical modeling, non-premixed combustion in a single cylinder was simulated using the presumed probability density function combustion model. Simulations were performed for dry as well as humid air intake, ranging from 5% to 30% relative humidity (RH). Numerical results have shown 40% reduction in NO emission at 10% relative humidity, when compared with the corresponding emission with dry intake air. With 15% and 30% relative humidity levels, NO emission were reduced by 65% and 93% respectively.
• Format:
  PDF
• Funding:
  65A0533 TO 013
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/40030/dot_40030_DS1.pdf
• File Type:
  [PDF - 1.34 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:88f2bd365c8bd5285c24f34c743489bf1800475826e14d7306027b149760b838