PROJECT
INCORPORATING COLD CHAIN
Ammonia is gravity-fed from the
leak, the extractor fan in the plant would
All maintenance work is now also handled
(COP), leading to reduced power
insulated surge drum to two ammonia/
discharge at a level high above the roof.
by MRE.
consumption and lower electricity costs,”
glycol plate heat exchangers.
Piping and vessels are insulated with
“The installation of the new plant went
says Grant Delaney, managing director of
preformed polyurethane sections, with
smoothly, and with me now being part of
circulated at -10°C by two Grundfos pumps
a foil-to-Mylar vapour barrier, which is
the MRE team, I am able to monitor the
“The Olive Convention Centre and
with 15kW motors. A third pump provides
protected by aluminium cladding.
performance of the plant closely,” says
Durban Ice Arena have again brought
Christo van der Merwe.
international fame to Durban’s Golden Mile
From the plate heat exchangers, glycol is
standby capacity in the case of a pump
malfunction.
For safety reasons, the plant has a critical
charge of only 300kg of ammonia, which is
limited to the plant room.
The ammonia circuit includes a Witt
HP float. In the event of an ammonia
1
38
Heat of rejection from the compressors
is recovered to heat water to between
“It was interesting to work on an ice rink
50°C and 55°C for use in the ablution
project. We do not see many ice rinks in
facilities.
our normal course of business. We used this
The removal of the old plant, installation
project to install the new M-series Mycom
and commissioning of the new plant was
reciprocating compressors, which offer
done by the KwaZulu-Natal branch of MRE.
improved coefficient of performance
MRE KwaZulu-Natal.
beachfront,” concluded Daniel.
CLA
1. After dressing the rink, the surface is of
a gloss finish.
2. The inviting entrance to the
convention centre.
2
www.coldlinkafrica.co.za
COLD LINK AFRICA • November | December 2016