Cold Link Africa Nov/Dec 2016 | Page 38

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