The system covers three district cooling plants that will provide over 34,000 m³ of chilled water an hour with a cooling capacity of 102,606 refrigeration tons (“RT”) to the 117 condominium blocks in the Discovery Gardens. The chilled water produced in the district cooling plants is used to cool the air conditioning systems in the individual condominium blocks.
Discovery Gardens is a luxurious 420,000 square metre residential development, comprising themed communities styled in a variety of garden experiences. The culturally themed communities are Mediterranean, Zen, Contemporary, Cactus, Mogul and Mesoamerican courtyard gardens. Discovery Gardens features multi-sized spacious apartments set amidst landscaped lawns, lush foliage and beautiful desert blooms. The stucco coloured architecture blends in with the surrounding lush greenery, enveloping residents in a relaxing lifestyle.
CNA’s role in the project includes designing the control and automation system; supplying the necessary computer hardware, programmable logic controllers and precision instrumentation; and customising software needed to ensure safe and efficient control of the system, including monitoring consumption by individual apartment blocks. The Facility Management System enables the operations and maintenance teams to track, monitor, control and fine-tune the district cooling system (DCS) plants to maximise operational and energy efficiency and schedule preventive and predictive maintenance for high equipment uptime.
The SCADA (Supervisory Control And Data Acquisition) System provided by CNA ensures smooth network communication between Central Plants and Energy Transfer Stations (located at the user buildings) via TCP/IP protocol over fibre optics. We also provide peer-to-peer flat communication architecture to enhance system response and reliability.
With the high level of software integration provided by CNA to the chiller and power distribution systems, the number of hardware points has been significantly reduced. The Energy Transfer Stations BTU meters are provided with the Meter-bus (M-bus) facility. These meters are connected to the Automated Meter Reading System (AMR) via the M-bus local area network for automated billing purposes.
One distinctive feature of the FMS is the capability of “single point operation” of the various plants and Energy Transfer Stations (ETS) from any of the 3 plant’s FMS workstations. With this design concept, the maintenance crew is not required to be stationed at all the 3 plants, hence reducing manpower deployment.
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