Hybrid and conventional hydrogen engine vehicles that meet EZEV emissions

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In this paper, a time-dependent engine model is used for predicting hydrogen engine efficiency and emissions. The model uses basic thermodynamic equations for the compression and expansion processes, along with an empirical correlation for heat transfer, to predict engine indicated efficiency. A friction correlation and a supercharger/turbocharger model are then used to calculate brake thermal efficiency. The model is validated with many experimental points obtained in a recent evaluation of a hydrogen research engine. A The validated engine model is then used to calculate fuel economy and emissions for three hydrogen-fueled vehicles: a conventional, a parallel hybrid, and a series ... continued below

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19 p.

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Aceves, S.M. & Smith, J.R. December 10, 1996.

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Description

In this paper, a time-dependent engine model is used for predicting hydrogen engine efficiency and emissions. The model uses basic thermodynamic equations for the compression and expansion processes, along with an empirical correlation for heat transfer, to predict engine indicated efficiency. A friction correlation and a supercharger/turbocharger model are then used to calculate brake thermal efficiency. The model is validated with many experimental points obtained in a recent evaluation of a hydrogen research engine. A The validated engine model is then used to calculate fuel economy and emissions for three hydrogen-fueled vehicles: a conventional, a parallel hybrid, and a series hybrid. All vehicles use liquid hydrogen as a fuel. The hybrid vehicles use a flywheel for energy storage. Comparable ultra capacitor or battery energy storage performance would give similar results. This paper analyzes the engine and flywheel sizing requirements for obtaining a desired level of performance. The results indicate that hydrogen lean-burn spark-ignited engines can provide a high fuel economy and Equivalent Zero Emission Vehicle (EZEV) levels in the three vehicle configurations being analyzed.

Physical Description

19 p.

Notes

OSTI as DE97052668

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  • International congress and exposition of the Society of Automotive Engineers (SAE): dedicated to the advancement of the global mobility industry, Detroit, MI (United States), 24-27 Feb 1997

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  • Other: DE97052668
  • Report No.: UCRL-JC--125891
  • Report No.: CONF-970210--6
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 496115
  • Archival Resource Key: ark:/67531/metadc682858

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 10, 1996

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  • July 25, 2015, 2:21 a.m.

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  • Feb. 16, 2016, 7:38 p.m.

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Aceves, S.M. & Smith, J.R. Hybrid and conventional hydrogen engine vehicles that meet EZEV emissions, article, December 10, 1996; California. (digital.library.unt.edu/ark:/67531/metadc682858/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.