The Coordinating Research Council (CRC) contracted Radian Corporation to develop a computer model to characterize 'real-world' evaporative emissions from motor vehicles. This is the first annual report under the contract. It explains the current CRC-Radian evaporative emission model which is names EVAP 2.0. The model expands upon the present EPA MOBILES3 emissions model to incorporate key factors affecting evaporative emission rates, including: representative urban driving patterns to characterize the probability of occurrence of trips during different times of the day; ambient temperatures for different areas and times of year on an hourly basis; fuel tank environments, including fuel weathering, fuel tank heating, and tank cool down; evaporative emissions defined as a function of RVP, ambient temperature, and fuel tank level; emissions of carbureted and fuel-injected vehicles in various states of repair. The model is intended to be used as a research tool and is highly modular, which allows it to be easily updated with new information.


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    Title :

    CRC (Coordinating Research Council)-Radian Evaporative Emissions Model: EVAP 2.0 Annual Report, 1987


    Contributors:
    S. Kishan (author) / T. H. DeFries (author) / R. Klausmeier (author)

    Publication date :

    1988


    Size :

    219 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English