ISTA Views

JANUARY | 2018

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sensors have been settled in pallets and returned at different steps of the logistic chain. 2 different experiments were made in the summer of 2014 and 2016. RESULTS In the first experiment, the in-container product temperatures confirmed what had already been observed by different studies: the 24 hour cycles have a small amplitude (+-3°C) and average temperatures in a day are between 7°C and 26°C from April to October. 10°C differences can be observed month to month from April to October. These results show the amplitude over the ocean is not as high as the amplitude that can be observed during the ground transportation. In fact, (Leinberger, 2006) has shown Pacific or Atlantic ocean temperatures follow the same trend: temperatures are comprised in the [7°C; 30°C] range. No extreme temperatures that could degrade shelf stable product have been recorded in any of our recorded data or in the literature(Leinberger, 2006). 16 ista views • December 2017/January 2018 • www.ista.org Temperatures During Transport Between Europe, China, Africa and USA: Data and Predictive Model > CONTINUED FROM FRONT COVER Figure 1 – Pre-store life of the product from our factory in France to North America stores Figure 2 – Truck load with 2 temperature recording sensors. One was put in a case on the top of the pallet, the other one was put in a case in the middle of the pallet. 1. The first protocol consisted in monitoring the oversea transportation conditions by placing a Logtag sensor in a case from our factory in France, to Montreal between April and October. 30 sensors were monitored from the factory to the stores and 22 were actually returned for analysis. 2. The second protocol consisted in monitoring the ground transportation conditions by placing a Logtag sensor in two locations of a pallet on two different LTL shipments in Arizona, in August – September 2015 (19 recorded days – 3000 miles). The first sensor was placed in a case at the top of the pallet and the second sensor in the middle of the pallet (Figure 2). 0 5 10 15 20 25 30 0 1 2 3 4 5 6 7 8 T°C Min/Max oversea temperatures April - October Average Min Max Jun Jul Aug Sept Oct May Apr Figure 3 – This figure shows the oversea min, average and max temperatures in degree Celsius by month from April to October. Results from these two experiments will be used to confirm previous results in the literature (Leinberger, 2006; ISTA, 2002) and build a predictive model of the temperature inside a truck.

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