UTILIZATION OF WASTE HEAT IN TRUCKS FOR INCREASED FUEL ECONOMY

Improvements in fuel economy for a broad spectrum of truck engines and waste heat utilization concepts are evaluated and compared. The engines considered are the diesel, spark ignition, gas turbine, and Stirling. The waste heat utilization concepts include preheating, regeneration, turbocharging, turbocompounding, and Rankine engine compounding. Predictions were based on fuel-air cycle analyses, computer simulation, and engine test data. The results reveal that diesel driving cycle performance can be increased by 20% through increased turbocharging, turbocompounding, and Rankine engine compounding. The Rankine engine compounding provides about three times as much improvement as turbocompounding but also costs about three times as much. Performance for either is approximately doubled if applied to an adiabatic diesel.

  • Supplemental Notes:
    • Prepared for the Department of Energy.
  • Corporate Authors:

    Jet Propulsion Laboratory

    California Institute of Technology, 4800 Oak Grove Drive
    Pasadena, CA  USA  91103
  • Authors:
    • LEISING, C J
    • PUROHIT, G P
    • DeGrey, S P
    • Finegold, J G
  • Publication Date: 1978-5-1

Media Info

  • Pagination: 41 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00185758
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NASA-CR-157292
  • Contract Numbers: NAS7-100
  • Files: TRIS
  • Created Date: Dec 29 1979 12:00AM