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   Coach insulation  evaluated  
Thermal insulation of coaches contributes to overall energy efficiency of passenger stock. Many measures can be carried out not only in new stock but also as a retrofit.
Technology field: Optimisation of comfort functions
open main section General information
close main section General criteria
  close sub-section Status of development: in use
    (no details available)
  Time horizon for broad application: now
    (no details available)
  Expected technological development: dynamic
    (no details available)
    Motivation:
   
  • Energy saving
  • Passenger comfort
  Benefits (other than environmental): small
   

Passenger comfort

In some cases an improved insulation of coaches (especially windows) eliminates heat bridges and thus negative impacts on passenger comfort.
  Barriers: low
   

Weight reduction efforts

There is often a target conflict between weight reduction and coach insulation efforts. The effort to make the coach body lighter usually leads to deteriorated thermal properties, e.g. aluminium coaches tend to have less favourable thermal properties than steel coaches.
    Success factors:
    In order to reduce the downtime of passenger coaches, existing retrofit cycles should be used to carry out individual measures for improving coach insulation.
  Applicability for railway segments: high
    Type of traction:  electric - DC, electric - AC, diesel
    Type of transportation:  passenger - main lines, passenger - high speed, passenger - regional lines, passenger - suburban lines
    (no details available)
    Grade of diffusion into railway markets:
  Diffusion into relevant segment of fleet: not applicable
  Share of newly purchased stock: not applicable
    Grade of diffusion is not an applicable criterion because coach insulation is a continuous improvement process rather than a specific technology.
  Market potential (railways): high
    (no details available)
    Example:
   

Refitting of B 20-73 at SBB

SBB refitted the B 20-73 coach with a bundle of energy saving measures (CO2 -ventilation, coach insulation etc.). Measures for improving the k-value of the coach included a thermal insulation of the outer shell (6 cm Fiberform 40 kg/m3) and ventilation ducts as well as an installation of new glass for windows with argon fill. These measures improved the k-value from the prior 2,06 W/m2 kg to 1,60 W/m2 kg.

The retrofit programme reduced total energy consumption (incl. traction) by 14 % and showed a good cost-benefit ratio.
open main section Environmental criteria
open main section Economic criteria
no data available Application outside railway sector (this technology is railway specific)
open main section Overall rating
References / Links:  Brunner et al. 2000;  Opel 1999
Attachments:
Related projects:  Savings on Coaches, Type Bpm
Contact persons:
 date created: 2002-10-09
 
 
© UIC - International Union of Railways 2003
 
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