30 REFRiGERATion & sToRAGE
Innovations in freezing mean
reduced frost-related downtime
hen a freezer runs, snow builds shockwave of pressurized air to blow off the
Traditionally, the
W
up on the coldest part of the inlet face of the coil and remove frost, can alone
downtime needed to freezer – the evaporator. For a double or triple run times. This option is applied
defrost freezers has been
given freezer capacity, a greater on all freezing equipment product lines from
an obstacle preventing
total surface area on the evaporator creates JBT FoodTech.
food and beverage
a more efficient freezer that can run longer Another technique that can be used instead
processors from getting
without defrosting. By significantly increasing of ADF is mid-shift defrost. During the night
maximum efficiency out
of their production lines.
the face area on the evaporator coil and on the shift when the line isn’t running, the freezer is
But recent advances in
cooling surface of the evaporator’s fins, the stopped and the ammonia refrigeration system
freezing technology can
latest generation of JBT FoodTech freezers gives is reversed to send hot gas instead of refrigerant
keep production lines frost more places to build up. This keeps the to the evaporator. This quickly defrosts the
running longer, resulting
frost from concentrating in one location, thus evaporator while still maintaining the rest of
in greater throughput and
extending the time the freezer can run without the freezer below freezing point. Then water is
greater profitability.
defrosting. flushed over the evaporator to rinse it and the
The air leaving the evaporator is very dry, freezer is restarted.
Traditionnellement, les
since moisture is left on the evaporator fins. In Producers who need even greater run times
périodes d’arrêt
the past, JBT FoodTech freezers featured fans than provided by ADF or mid-shift defrost
nécessaires pour
that were positioned in front of the evaporator, have another option-a freezer with sequential
décongeler les appareils
facing the air flow direction. As a result, the fans defrosters. A typical freezer uses one chamber
frigorifiques étaient un had problems with snow buildup. On new JBT to which all the evaporator pieces connect.
obstacle qui empêchaient
FoodTech M-series freezers, the fans are located Freezers with a sequential defroster, such as JBT
les entreprises de
past the evaporator, eliminating this issue and its FoodTech’s GYRoCOMPACT self-stacking spiral
transformation
potential to reduce run times. and FLoFREEZE IQF freezers, feature separate
alimentaire d’exploiter au
One technology developed nearly a quarter chambers that each have their own dedicated fan
mieux leurs chaînes de
production. Mais de
century ago that remains an efficient option and evaporator. This enables the freezer to have
récents progrès dans la
by JBT FoodTech is air defroster, or ADF, spare capacity available at all times so that one
technologie de surgélation
technology. This technology, which sends a quick evaporator and fan can be shut down to defrost
permettent aux chaînes
de production de
fonctionner plus
longtemps, ce qui
améliore le rendement et
la productivité.
Traditionell waren die
zum Auftauen von
Tiefkühlgeräten
erforderlichen
Ausfallzeiten ein
Hindernis, durch das
Fig. 1. The
Lebensmittel- und
Getränkeverarbeiter ihre
Frigoscandia
Fertigungslinien nicht
ADVANTEC
optimal nutzen konnten.
Impingement
Durch jüngste Fortschritte freezer is a
bei der Kühltechnik linear freezer
können jetzt jedoch
that freezes as
Fertigungslinien länger
fast or faster
laufen. Das Ergebnis sind
than cryogenic
höherer Durchsatz und
freezing at lesser
größere Rentabilität.
total operating
cost.
www.scientistlive.com
Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44