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Study of the sublimation temperature of the dry ice in the transport of the Covid-19 vaccines.

Number: 1150

Author(s) : CALBA C., ASSIER J-F., GIRAUD T., CAVALIER G.

Summary

The immunization campaign for Covid-19 requires the use of a cold chain at very low temperatures. Some of the vaccines must be transported and stored between -60 and -90°C.
Dry ice is used to transport vaccines at those temperatures. Dry ice sublimates at -78.5 °C, at normal pressure conditions. The performance of this cold chain is tracked by recording the temperatures throughout the transport. However, temperatures even lover than -90 °C have been recorded during transport refrigerated by dry ice.
The aim of this study is to explain those temperature recorded variations by a data logger in an apparently stable environment.
Our initial hypothesis was pressure variation: thus we needed to identify what could possibly cause these pressure variations and reproduce it.

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Pages: 7 p.

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Details

  • Original title: Study of the sublimation temperature of the dry ice in the transport of the Covid-19 vaccines.
  • Record ID : 30029508
  • Languages: English
  • Subject: Technology
  • Source: 7th IIR International Conference on Sustainability and the Cold Chain (Online). Proceedings: April 11-13 2022
  • Publication date: 2022/04/11
  • DOI: http://dx.doi.org/10.18462/iir.iccc2022.1150
  • Document available for consultation in the library of the IIR headquarters only.

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