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Chapter 6
Transport Refrigeration
Chapter Lead Author
Radim Čermák
Co-Authors
Michael Kauffeld
Holger König
Richard Lawton
Alexander C. Pachai
Giorgio Rusignuolo
6 Transport refrigeration 6.1 Introduction
Transport refrigeration is a small but vital segment comprising delivery of chilled or frozen products by means of trucks, trailers, vans, intermodal containers and boxes. It also includes the use of refrigeration and air conditioning on merchant, naval and fishing vessels above 100 gross tonnes (GT) (over about 24 m in length).
Most development has taken place in the intermodal container industry since 2010. Although many of the lessons are applicable to road transport, differences between containers and road vehicles should not be neglected, and may lead to different system solutions and (possibly) to different refrigerant choices. The three top candidates in the container industry are R-744, hydrocarbons and low-GWP HFCs.
In contrast to the 2010 report, more insight is provided on eutectic and cryogenic systems which may be attractive for some types of transport routes. Porthole container ships, which do not exist any longer, are omitted, as are dedicated railway systems where trailer units or intermodal containers units are now utilized. The niche segment of airfreight containers is added.
New information about vessels in terms of type and refrigerant charge is provided based on the 2012 IMO study. It appears that the differences in type are large and segmentation is needed in the future. Analyses on refrigerant options are limited in this chapter, and the reader is advised to consult the chapters dealing with industrial and air-conditioning systems.
Based on research, the road vehicle fleet size previously estimated at 4 million in the 2006 and 2010 RTOC Reports has been downsized to 2 million. This changes the overall picture in that the refrigerant banks in vessels almost double the banks in other transport sub-segments.
While CFCs and HCFCs can be found in older equipment, virtually all new transport refrigeration systems continue to utilize HFCs, with a prevalence of HFC-134a and R-404A. Some systems aboard vessels utilize HCFC-22 in both non-Article 5 and Article 5 countries. R-717 and R-744 systems are being installed on fishing vessels.
Appendix A contains a general overview and technical progress information, further, the ozone depletion potential (ODP) and global warming potential (GWP) values of the refrigerants discussed in this chapter are given in chapter 2 of this report.
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