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MOVES2014: Evaporative Emissions Report
Citation:
MOVES2014: Evaporative Emissions Report. U.S. Environmental Protection Agency, Washington, D.C.
Impact/Purpose:
The report documents updates made to EPA’s MOVES model evaporative emission methodology: vapor leak prevalence rates; cold soak/multi-day diurnal emission rates; running loss fuel volatility/ambient temperature effects; a vapor generation algorithm for altitude effects; and new I/M program credits. MOVES hot/cold soak emission rates are updated with new test data.
Description:
Vehicle evaporative emissions are now modeled in EPA’s MOVES according to physical processes, permeation, tank vapor venting, liquid leaks, and refueling emissions. With this update, the following improvements are being incorporated into MOVES evaporative emissions methodology, adding: vapor leak prevalence rates; cold soak emission rates (including multi-day diurnals); fuel volatility/ambient temperature effects for running loss emissions; an altitude effects algorithm for tank vapor generation; and I/M program credits for recent model updates. The report updates MOVES hot and cold (i.e., diurnal) soak vehicle evaporative emission rates with new field/laboratory test data.
URLs/Downloads:
Evaporative Emissions from On-road Vehicles in MOVES2014 (420R14014) (PDF, 107 pp, 2695 KB, about PDF)Final MOVES2014 reports
Final Report: Peer review of Evaporative Emissions Report in Support of MOVES2013 (PDF, 23 pp, 217 KB, about PDF)
Development of Evaporative Emissions Calculations for MOVES2014 (PDF, 53 pp, 1421 KB, about PDF)
Charge Letter for Peer Review of Evaporative Emissions Report in Support of MOVES2013 (PDF, 2 pp, 184 KB, about PDF)
Peer Review Charge Questions for Evaporative Emissions Report (PDF, 2 pp, 17 KB, about PDF)