Technical Director Michael Tang Presents a Case study on The Upgrading Work Hurley Palmer Flatt Completed for DCSG’s Secondary Chiller Plant Project
DCSG Singapore facilities at 7000 Ang Mo Kio Avenue 5 provides a data centre with full MEP infrastructure to their clients. DCSG is currently a tenant and the current chilled water plant infrastructure belongs to the landlord. As a result, DCSG have decided to upgrade their system to provide a higher level of redundancy for the mechanical plant and associated electrical supply and make up water system by reducing their dependence on the landlord’s equipment and the loss of control over key issues associated with this. After the upgrade is complete, DCSG will have control of their own system and the landlord’s system will only be used in the event of critical failure. Hurley Palmer Flatt have been appointed to undertake the design of this upgrading works together with the other sub-consultants from the site feasibility stage through construction to commissioning of the system.
Initial planning allows for up to 6 chillers to be installed in stages. Stage 1 of the upgrade covers the addition of 2 modular stackable chiller plant systems complete with cooling towers, water tanks, buffer tanks, pumps and associated equipment required to meet DCSG’s requirement for an N+1 redundancy level. As demand increases, additional stages will provide for the future installation of up to a further 4 Chillers and associated equipment. Initial design detail is based on meeting an estimated end state capacity of up to 4,500RT. However, the end state detail design capacity will be dependent on the final load analysis. At all stages of development N+1 redundancy will be achieved and maintained.
To minimise disruption on subsequent stages, civil works such as foundations complete with anchorage fittings for equipment will be constructed for all stages as part of stage 1. This will ensure a homogeneous and continuous slab and eliminate the necessity to bring intrusive piling equipment back to site as future expansions stages take place.
Existing chilled water piping will be utilised for circulation of chilled water with modifications limited to those necessary to enable the connection of the two additional chiller plants.
The design will not alter floor space ratios, interfere with, or alter traffic flow on site or affect access and hard stand areas for emergency services such as fire trucks. Throughout the design process a consciousness of the need to design with minimum interruption to existing site and data centre operations will be maintained. As such the project team was able to achieve zero gross floor area (GFA) increase due to this configuration.
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