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IIR document

Ageing of in-service refrigerated transport vehicles: a statistical analysis.

Number: pap. n. 1689

Author(s) : CAPO C., PETIT J. M., REVELLIN R., et al.

Summary

The efficiency of the thermal insulation of bodies for refrigerated vehicles decreases with time, i.e. the body’s overall insulation coefficient (“K coefficient”) increases during ageing. Ageing is a twofold phenomenon involving both physio-chemical and mechanical factors: their estimation is very important for the design of better performing vehicles, but also for their smart use. Since 1953, Cemafroid has been determining, each year, the K coefficient for hundreds of in-service refrigerated vehicles at twelve years of life and more. This paper presents a statistical analysis of the data of some thousands of these vehicles. First results for a sample of refrigerated trucks highlight a greater ageing in the period 0-12 years (average variation of K up to 65%) than in the period 12-18 years (average variation of K equal to 5%). Furthermore, it turns out that the evolution of K in this 12-years window depends mainly on the type of vehicle, the type of insulation and the blowing agents, the quality of manufacturing, the type of refrigerating unit installed on the vehicle and the type of transported foodstuffs.

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Details

  • Original title: Ageing of in-service refrigerated transport vehicles: a statistical analysis.
  • Record ID : 30026286
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1689

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