Detailed information is required for planning transport systems. Such information should indicate how different modes and designs use energy, e.g. by comparing hovercraft with conventional ferries, fixed-wing aircraft with helicopters, etc. The aim of this report is to provide this data by identifying and estimating the major direct and indirect energy requirements of common types of ships. The methods used to obtain such information are explained along with the assumptions made, as well as the variation of g.e.r. with ship size, speed etc. The unit of account used is the Gross Energy Requirement (G.E.R.) which is "the amount of energy source sequestered by the process of making a good, or providing a service." In calculating G.E.R. values five distinct components are identified. The fuel or direct energy requirement is the most important input to the g.e.r. and consists of the total energy used to provide motive power. This item is expressed in units of KWht/cargo-ton-mile or KWht/seat-mile (UK long ton and standard mile). The construction and maintenance energy requirements (e.r.'s), which are indirect energy inputs, are presented in the same units. The remaining components are less obvious and consist of the energy required to provide transport networks, i.e. waterways, canals, etc., and fixed facilities such as ports and terminals. The network energy requirement is expressed in KWht/ton-mile (or KWht/passenger-mile) after the energy input has been partitioned between users. The fixed facility e.r. must also be partitioned but since no distance factor is incurred by the use of terminals etc., these values are presented in terms of KWht/ton (or KWht/passenger). Due to this difference with the previous components, the gross energy requirement of a particular system (which is the sum of the individual components) must be expressed in KWht/ton or KWht/passenger for a given voyage. The study analyzes the four major inputs to marine transport - fuel consumption at sea, construction, maintenance and cargo handling for tankers and dry bulk carriers, general cargo vessels, passenger vessels and short sea or mixed cargo vessels.

  • Corporate Authors:

    Open University, England

    Walton Hall
    Milton Keyes MK7 6AA, Buckinghamshire,   England 
  • Authors:
    • Mortimer, N D
  • Publication Date: 1974-11

Media Info

  • Features: References;
  • Pagination: 51 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00312193
  • Record Type: Publication
  • Report/Paper Numbers: ERG 007 Res. Rpt.
  • Files: TRIS
  • Created Date: Aug 27 1980 12:00AM