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HomeMy WebLinkAboutDiesel Emissions Quantifier Jeffra Rockwell-NASEO-Presentation 03-29-2017-ADiesel Emissions Quantifier (DEQ) Presentation to NASEO Jeffra Rockwell, US EPA Office of Transportation and Air Quality March 29, 2017 1 What is DEQ? •Estimator for evaluating clean diesel projects and upgrade options for medium-heavy and heavy-heavy duty diesel engines •Interactive, web-based tool for users without modeling experience •New release coming in April 2017 2 What DEQ Does •Assesses onroad, nonroad, locomotive and marine projects •Accepts user-specific inputs for engine specs and usage •Allows for multiple upgrades (emission control devices, idle reduction, replacements, alternative fuels, etc.) •Provides annual and lifetime estimates for –Baseline emissions (in short tons) –Reduced emissions (in short tons and % of baseline) –Cost effectiveness (total project and/or capital costs) –PM related health benefits (needs updating)3 What DEQ Doesn’t Do •Does not estimate –Emissions from C3 marine engines –GHG reductions except for CO2 when fuel usage is reduced –Offsets for emissions from power plants –Black carbon emissions –Health benefits from NOx, HC and CO reductions •Cannot be used for SIPs or Conformity 4 How DEQ works •For engine or vehicle replacements: DEQ estimates emissions from both the old and new engines. The difference is the estimated emission reduction resulting from the replacement. •For other upgrades (emission controls, idle reduction, etc.): DEQ applies EPA or CARB verified emission reduction factors to the baseline emissions. The result is the estimated emission reduction from the upgrade. 5 Assumptions in DEQ •CNG, LNG and LPG engine/vehicle replacements use diesel criteria pollutant factors as a surrogates. –No good data source for alternative fuel & engine factors –Alternative fuel engines must meet diesel standards –Converts alternate fuel to diesel-equivalent gallons for CO2 •Median life is used in estimating lifetime reductions; this may be edited, but the value is capped. •For nonroad, locomotive and marine, assigns baseline engine year or tier when only one of these is entered.6 Data sources for DEQ •Onroad –MOVES2014a (in-use data) •Nonroad –Factors & formulas from the NONROAD model –EPA regulatory documents •Locomotive –EPA regulatory documents •Marine –EPA regulatory documents •Emission reductions from EPA and CARB verification and certification programs 7 Strengths of DEQ •Easy to use •Projects can be saved for later editing and review •Inputs and results are downloadable in Excel format •Historic baseline data –Onroad beginning 1985 –Nonroad, locomotive and marine beginning 1973 •Specific emission factors for running, duty -cycle idling & hoteling for onroad vehicles •Duty-cycle specific factors for line haul locomotives 8 Limitations of DEQ •No NOx reduction with switch from ULSD to alternative fuel (may see reductions from newer engine or other upgrade) –Uses ULSD factors for criteria pollutants –Have factors for B5 and B20 for onroad vehicles •No offset of power plant emissions for electric engine/vehicle replacements or electrified parking spots •Health benefits module needs updating 9 Create New Project –onroad, nonroad or locomotive 10 Add Vehicle or Engine Group –onroad, nonroad or locomotive 11 Define a Vehicle Group -onroad 12 Define a Vehicle Group –nonroad and locomotive 13 Add an Upgrade –onroad, nonroad or locomotive 14 Add an Upgrade -onroad 15 Add an Upgrade –nonroad and locomotive 16 Create New Project –marine 17 Add Engine Group –marine 18 Define an Engine Group -marine 19 Emission Results 20 Cost Effectiveness 21 Health Benefits 22 Health Benefit Results 23 For More Information DEQ website www.epa.gov/cleandiesel/diesel-emissions-quantifier-deq ~~~ Questions about DEQ or the DERA option cleandiesel@epa.gov 877-623-2322 24