PROJECT
INCORPORATING COLD CHAIN
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Danfoss medium pressure valve
which maintains a constant pressure
in the liquid receiver.
Plate Heat Exchanger mounted on
the common discharge line for the
supply of 5 000 litres per hour of hot
water at 60°C to the facility.
A cold-water supply of 2 000 litres per
hour at 7°C.
Gas detection system in the plant
rooms with audible and visible alarms.
Two gas coolers installed with EC fans
that each deliver a capacity of 684kW.
Various evaporators for each room
in the facility making use of hot gas
defrost where applicable.
Only one third of the low temperature
load on each rack can be defrosted
at any given time to ensure there is
enough heat generated.
Electronic expansion valves were
installed on all the evaporator coils.
Gas detectors are also installed
near the bottom of each room with
audible and visual alarms.
Valve stations are installed at each
evaporator coil in order to facilitate
maintenance with an additional
bypass valve to ensure any liquid
that gets trapped can boil off again.
The new CO 2 plant is
currently realising energy
savings of about 30%
compared to the old
plant, which the client is
very happy about.
Redundancy was built into the system
to ensure they wouldn’t experience any
downtime when anything went wrong
with the refrigeration plant.
1. Samon leak detectors.
2. Modine pull down freezer blower coil.
3. Outdoor refrigeration plant.
4. Inside the holding freezer.
COLD LINK AFRICA •
SEPTEMBER 2019
www.coldlinkafrica.co.za
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