July/August 2021 - 15

" To mitigate the risk, we're really
looking at additional mechanical
cooling and better ventilation practices, "
said Forbush. " So excessive fan run
time when the outside conditions are
not favorable is something we need to
focus on, especially in ambient cold
storage. "
Techmark participated in a study out
of Michigan State University, led by
environmental science and geography
professor Julie Winkler. The study
evaluated historical weather data in the
state, and using climatological models,
predicted temperatures will be warmer
than the desired storage temperature in
the long term.
When asked what growers could be
expected to invest to improve cooling
in their storage units, he said it was
too difficult to predict. With steel and
lumber costs being as high as they are
currently, it may not be the ideal time
to build. And while some stores could
be retrofitted with a refrigeration unit
or chiller, many will need to be rebuilt
entirely. Return on investment will
heavily depend on regional weather
University of Idaho Extension specialist and professor Nora Olsen is an expert in potato
storage. She said evaporation cooling systems can be used to help cool potatoes, especially in
arid regions. Photo: Bill Schaefer
patterns and the overall risk changes in
those patterns bring.
Some growers are concerned about the
increased cost that comes with running
refrigeration units longer and more
often. They're also concerned about
what refrigeration does to potatoes
in
long-term
storage. Refrigerating
Spudman * July/August 2021
15

July/August 2021

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