Working within an aggressive five-month timeframe - versus a
standard timeframe of 10 to 12 months - Stellar Energy designed,
fabricated and installed two hybrid chiller plants for new stations
on Dubai Metro's Green Line. Each plant has a capacity of 3,750 TRs
and features a hybrid design, with both modular and stick-built
(constructed on-site) components. The chiller modules, including
pumps and electrical panels, were fabricated offsite, while the
concrete makeup water tank, the main switchgear room, utility room,
and the control room are all conventional block-wall and
concrete-roof buildings constructed on site.
The chillers feature primary-secondary pumping, which increases
system temperature drops, decreasing total pump horsepower and
increasing system controllability. One of the stations continued to
operate public buses during construction, requiring a carefully
orchestrated approach to ensure the public's safety while still
meeting the project deadline.