Title

Annual Average Vs Monthly Average Values For Selected Inputs To Mobile6 - Effect On An Annual Emissions Inventory

Abstract

In many urban areas, on-road vehicles are the biggest contributing source category of VOC and NOx. Based on a recently completed emission inventory study for three counties in Central Florida, the major source by far of anthropogenic VOC and NOx was on-road mobile sources, even though other sources (such as construction equipment, lawn and garden equipment, and various point sources) were also significant. Although there is specific guidance for conducting an ozone-season inventory for mobile sources, there is a lack of detailed guidance as to how to employ EPA's latest mobile source emission factor program, MOBILE6, for an annual inventory. Several of the MOBILE6 inputs that significantly influence emission factors, e.g., temperature, can vary widely throughout the year, and the annual average value may not be appropriate. Rather it may be better to utilize monthly values of these parameters. The sensitivity of the annual emission inventory results to using annual or monthly values of temperature, Rvp of gasoline, and humidity is presented. With colder temperatures and higher Rvp, the CO emissions are highest in December through February. Despite the higher temperatures of summer, the VOC emissions decreased, and the CO emission factors decreased more than expected. The annual CO emission were the most different at ∼ 10,583 ton/yr or ∼ 2.6% of the total on-road emissions. This is an abstract of a paper presented at the AWMA 97th Annual Conference and Exhibition (Indianapolis, IN 6/22-25/2004).

Publication Date

12-1-2004

Publication Title

Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

21944449394 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/21944449394

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