The introduction of hydrogen fuel cell vehicles and their new technology has created the need for development of new fuel economy test procedures and safety procedures during testing. The United States Environmental Protection Agency-National Vehicle Fuels and Emissions Laboratory (U.S. EPA-NVFEL) performed the first hydrogen fuel cell vehicle fuel economy tests in November 2002 and then again in September 2003. It took approximately eight months to comply with the National Fire Protection Association (NFPA) codes related to safe handling of gaseous hydrogen and to design and implement the equipment changes necessary to measure hydrogen fuel economy. The primary safety factors in dealing with toxic or flammable gases are the internal volume of the test site, exhaust air movement and frequency of air exchange. System construction (components and materials), detectors, sensors, control interlocks and procedures can be combined to maximize safe handling of hydrogen. This paper will address the facility modifications, data acquisition instrumentation, test procedures and analytical equipment used to accommodate chassis-dynamometer fuel economy testing of a hydrogen-fueled light-duty vehicle. The paper will also present a brief comparison of the 3-different methods, currently under consideration in the SAE J2572 draft standard for determining the hydrogen fuel economy from chassis dynamometer vehicle testing, for the first vehicle configurations to undergo testing at EPA-NVFEL. The experience gained with first two series of hydrogen fuel cell vehicle tests will lead to further improvements in hydrogen vehicle test capabilities, procedures and safety at EPA-NVFEL. These will include: 1. Testing from a larger, single compressed hydrogen tank to eliminate switching and moving compressed cylinders. 2. Specifying accuracy and precision for the temperature and pressure measurements, and switching to thermocouples mounted inside the compressed hydrogen tank. 3. Conducting 'round robin' testing to determine lab-to-lab variability for hydrogen fuel cell vehicle fuel economy testing. 4. Further development of the Coriolis Method to improve flow measurement at low hydrogen flow rates. 5. Further investigation of the applicability of fuel economy corrections for SOC effects. 6. Further investigation and development of procedures for Vehicle load determination and dynamometer matching of vehicles with regenerative braking. 7. Commissioning of a second EPA hydrogencapable vehicle test site. The second site will include use of a four-wheel-drive dynamometer.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Hydrogen fuel cell vehicle fuel economy testing at the U.S. EPA national vehicle and fuel emissions laboratory


    Beteiligte:


    Erscheinungsdatum :

    2004


    Format / Umfang :

    18 Seiten, 12 Bilder, 1 Tabelle, 10 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Hydrogen Fuel Cell Vehicle Fuel Economy Testing at the U.S. EPA National Vehicle and Fuel Emissions Laboratory

    Paulina, C. M. / Society of Automotive Engineers | British Library Conference Proceedings | 2004


    Hydrogen fuel cell vehicle fuel economy testing at the US EPA National Vehicle and Fuel Emissions Laboratory

    Paulina,C.M. / Environmental Protection Agency,US | Kraftfahrwesen | 2004



    Hydrogen Fuel Cell Vehicle Fuel Economy Measurements and Calculation

    Kulik, Ed / Sun, Ed / Thomas, Fred et al. | SAE Technical Papers | 2004


    Hydrogen Fuel Cell Vehicle Fuel Economy Measurements and Calculation

    Ding, Y. / Kulik, E. / Bradley, J. et al. | British Library Conference Proceedings | 2004