After having compared the results of the investigations enumerated at the end of the account of the programme of work, the B 13 Specialists found that there were differences in the presentation of the electrical heating and of the steam heating results. In the case of electrical heating, the results of the different tests all tallied closely. In the case of steam heating, there was close agreement between all the results showing the mean values for a given number of service trains, but there was a certain scatter when isolated trains were concerned. As is known, steam heating is affected by the considerable losses which occur in the energy supply: steam expansion and heat losses in the main heating pipe, steam leaks resulting from the smallest fault in the installations and, in particular, at pipe couplings. The energy losses vary greatly from one train to another, depending on whether there are heating failures or not and whether the coaches of the train are at the beginning or at the end of the inspection cycle etc., but over the whole or part of the heating season the energy losses balance out to such as extent that the same total heating energy consumption, related to one coach and for a same ambient temperature, has been found in Great Britain, France, Austria and Poland. It is the extreme losses which are responsible for the differences found, on isolated trains, from the average energy consumption in service, measured in the four above-mentioned countries. For example, with an ambient temperature of 0 degrees C, these differences range: from minus 30% in the case of an isolated run without any heating failure and with a train of new DB coaches, i.e. when the losses are reduced to a minimum, to plus 28% with a train of BR coaches which could not undergo normal periodic inspection and plus 35% with this same train when the steam leakage was especially severe, i.e. when the leakage attained its maximum value immediately before the periodic inspection.

  • Supplemental Notes:
    • Restrictions on the use of this document are contained in the explanatory material.
  • Corporate Authors:

    International Union of Railways

    Office of Research and Experiments
    Utrecht,   Netherlands 
  • Publication Date: 1968-4

Media Info

  • Features: Appendices; Figures;
  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00053026
  • Record Type: Publication
  • Source Agency: International Union of Railways
  • Report/Paper Numbers: B 13/RP 13/E
  • Files: TRIS
  • Created Date: Sep 16 1976 12:00AM