Projects completed at U.S. EPA (2015 - 2020)
Related to the MOtor Vehicle Emission Simulator (MOVES, link) model, MOVES_CTI_NPRM version. The rates updates cover running exhaust CO2, THC, CO, NOx, and PM2.5 for MY 2010–2060, unless noted otherwise.
Related to the MOtor Vehicle Emission Simulator (MOVES, link) model, MOVES_CTI_NPRM version. The rates updates cover running exhaust CO2, THC, CO, NOx, and PM2.5 for MY 2010–2060, unless noted otherwise.
- Late MY diesel heavy-duty vehicles (HDVs) – improved energy and emissions rates for MY 2016–2060; added 2 million seconds of the latest heavy-duty in-use testing (HDIUT) data from 74 HDVs to the previous dataset; proposed for inclusion in MOVES3, the next public release version of the model
- Effect of intake humidity on NOx emissions – updated the equations and coefficients for all fuel and vehicle types and all model years; Proposed for inclusion in MOVES3
- Diesel HDVs rates update – based on 8 million seconds of quality-assured HDIUT data from 291 vehicles; previous rates based on pre-DPF and pre-SCR vehicles; led to large increase in running exhaust NOx inventory; critical to establishing benefits from a rulemaking to reduce NOx emissions from HDVs
- Gasoline HDVs rates update – analyzed current gasoline technology real-world in-use data; previous rates based on pre-2000 gasoline vehicles
- Natural Gas(NG) HDVs rates update – analyzed current NG technology real-world in-use data; previous rates based on early 2000 model-year gasoline and NG vehicles
- Glider HDVs – conducted analysis to establish that MY 2000 diesel HDV emission rates are representative of new glider vehicles
- Revised the fixed mass factor (fscale) for all MY 2010–2060 HDVs – fundamental change in the MOVES model that improved its ability to distinguish between low-/medium-/high-load operation
- CH4/THC ratio for MY 2010–2060 diesel HDVs – updated based on literature review; significant effect on pollutants, such as formaldehyde, chained to non-methane HCs
- Evaluated real-world emissions reduction from HD 2007/2010 standard and technologies such as SCR; led briefing to present findings to the Office Director of the Office of Transportation & Air Quality; analysis used in CTI’s Regulatory Impact Analysis of the Notice of Proposed Rulemaking (NPRM)
- Led the development of the What-If Analysis Inventory Tool (WAIT) – takes user-defined HD gasoline, diesel, and CNG base emission rates, and useful life and warranty standards to produce national emissions inventory; significant time and effort savings compared to running the MOVES model; trained the CTI team on using WAIT to develop control cases for the NPRM
- Developed estimates of emissions contribution from tampering & mal-maintenance and vehicle operation under idle, low-/medium-/high-load for baseline and control options; graphics used in the briefing to the EPA Administrator to select control options for the NPRM
- Contributed to various rulemaking discussions and analysis related to certification standards, compliance methods, in-use testing, generation/use of credits, on-board diagnostics, benefit-cost, and air quality modeling