PROJECT
INCORPORATING COLD CHAIN
The absorbed power is 56kW for each unit
with a 75kW motor.
Each package incorporates
a compressor, marine shell and
titanium tube condenser, and suction
accumulator designed with a heat
exchanger to sub-cool high-pressure
liquid and evaporate the liquid overfeed
from the ice maker.
The entire package is manufactured
by Everflo and includes all valves and
controls. They only require a liquid and a
suction line connection on site.
Everflo’s standard package comes
with the marine shell and tube condenser
and could be used with cooling tower or
seawater. In this case, they used seawater
for the condensers due to the proximity
of cold seawater. “The advantage is
water saving and improved coefficient of
performance (COP) with lower absorbed
power,” said Potgieter.
How do these ice makers work,
though? The ice maker has a double-
walled vertical steel drum, and low-
temperature ammonia is circulated
through the wall of the drum without the
use of an ammonia pump. Freshwater
is sprayed on the inside of the drum
and forms ice, which is scraped off by
a rotating scraper. The ice falls into an
insulated bunker below. The bunker has
The new plant has four Everflo ammonia package units each with a cooling capacity of 145kW at -25°C and 30°C condensing.
a raking system to rake the ice into a
conveyor, which takes the ice about 50m
QUALITY CONTROL IN
FACTORY ASSEMBLY
in Killarney Gardens, Cape Town. The
packs have a small footprint and can
Everflo has been designing and be transported on conventional road
manufacturing refrigeration systems for vehicles or in standard shipping containers
ice bunker and racking system and industrial applications since 2003, fine- for export. The packs for Gansbaai Marine
duplicated the same to accommodate tuning the design over the years until each had a mass of only four tonnes.
the increased capacity of the four new finally coming up with their new range of ice makers. packaged ammonia packs. Except for BENEFITS OF INDEPENDENT SYSTEMS
to the boats.
Gansbaai Marine built the original
the imported compressors, valves, and There are seven models available in the
reduced the installation time of the motors, the manufacture and fabrication range of Everflo ammonia packs and it
complete system on site to only four weeks. are all done in-house at the Everflo plant can, with the least amount of site labour,
The use of Everflo packaged units
COLD LINK AFRICA • May 2019
www.coldlinkafrica.co.za
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