Title: Exergy efficiency factors for transportation: updated Reistad estimates

Authors: David C. Bligh; V. Ismet Ugursal

Addresses: Department of Mechanical Engineering, Dalhousie University, Halifax, N.S., B3H 4R2, Canada ' Department of Mechanical Engineering, Dalhousie University, Halifax, N.S., B3H 4R2, Canada

Abstract: Studies that involve the estimation of the energy and exergy efficiencies of the transportation sector commonly use the operating efficiency estimates of the different modes of transportation that date back to 1970. Considering the improvements in operating efficiency realised since 1970 in all modes of transportation, the use of these estimates in current studies may cause inaccuracies in the results obtained. In the absence of comprehensive new studies and estimates to replace the 1970 estimates, this paper presents a set of operating efficiency estimates that were obtained by modifying the original estimates using published values that reflect the improvements in energy efficiency since 1970.

Keywords: exergy efficiency; operating efficiency; Reistad estimates; energy efficiency; transport industry; transport modes.

DOI: 10.1504/IJEX.2013.053390

International Journal of Exergy, 2013 Vol.12 No.2, pp.273 - 277

Received: 22 Feb 2012
Accepted: 01 Jun 2012
Published online: 20 Apr 2013 *

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