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IIR document

Experimental error in large scale cooling operations.

Number: pap. n. 1058

Author(s) : OLATUNJI J. R., SHIM Y. M., EAST A. R.


Pre-cooling is a vital process for the horticultural cool chain, reducing produce to storage temperature quickly and efficiently. Capturing the ‘true’ temporal and spatial cooling rates in pre-coolers is prohibitively expensive in terms of time and resources due to their large size, resulting in a worrying trend where small sample sizes are taken as representative of the entire process; and no experimental repetitions eliminates information on the bounds of experimental uncertainty. This study starts to address these concerns by repeating a large scale experimental pre-cooling set up five times – pallets of polylined Hayward kiwifruit (Actinidia deliciosa) cooled in laboratory conditions, with a large number of temperature probes. Variability between trials for an entire pallet was ±16%, and variability of observed HCT on an individual box scale was ±21%. A substantial portion of this variability (7%) could be attributed solely to a ±0.5 °C error in thermocouple accuracy.

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  • Original title: Experimental error in large scale cooling operations.
  • Record ID : 30026327
  • 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.2019.1058


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