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Project
Andrew Minaar | AMC Engineers
The HT reciprocating compressors .
AMC Engineers
HVAC INSTALLATION Andre van der Merwe , managing director of Evapco South Africa , explains that for this project Evapco was the successful supplier of the system , including the industrial level , evaporative condensers .
“ Evapco continually strives through its vast research and development programme to design and supply products focused on : ȃ ȃ ȃ ȃ
Higher system efficiency Environmental responsibility Lower annual operating costs Reliable simple operation and maintenance
“ The equipment was selected and specified by the consulting engineers AMC Consulting .
The units were supplied via the main refrigeration contractor Marine & Refrigeration Engineering ( Gauteng ). The units supplied were three off Evapco Model No . PHC S715 . These are induced draft , counterflow , belt drive axial fan two stage evaporative condensers . The units are ‘ twin cell ’ configuration each ,” explains van der Merwe .
These units are each rated for ammonia condensing at 2 300kW total heat rejection .
This is to be achieved at a lower than standard 30.0 ° C condensing temperature for optimum system efficiency .
He explains that the PHC Range units offer the highest cooling efficiency and cost-effective solution in the industry .
Some of the unique features included in the unit supply are :
• Integral external access platforms
• ‘ Sun Blocker ’ inlet louvers to prevent biological growth and ingress of debris and water splash-out
• High Premium Efficiency fan and pump motors
• Non-fouling low maintenance ‘ ZM ’ spray nozzles
• Evapco unique patented ‘ Oval Tube ’ Sensi-Coil design
• Automated electric water level control package .
“ The condensers were 100 % manufactured locally in our facility in Isando , Kempton Park .
The order for the condensers was received mid-December 2021 and required delivery to site mid-April of 2022 .
“ This is most definitely a significant size project and fortunately this was after the main Covid lockdown , and we had a sufficient time frame of four months to complete manufacture . We did , however , like most local manufacturers , experience stock shortages of certain key components in our supply chain , but we succeeded in getting the units ready by the required deadline .
“ Due to the size of these condensers each unit ships in four sections ; two off basins and two off top casing sections , for a total of 12 sections . That meant that coordinating the logistics to site needed some careful planning . Over and above , these sections are all abnormally wide and so required special freight permits with an escort . “ The one beneficial factor was that the new site in East Port Logistics Park is less than 20km from our factory . Our own inhouse Mr . GoodTower Service crews were on hand to assist with the site rigging and assembly to ensure the units went together without any delays or issues .
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RACA Journal I June 2023 www . refrigerationandaircon . co . za