Design Envelope Pump Delivers Energy Upgrade for Toronto Hotel

The renovation included major structural changes to the original towers, designed by architects Peter Dickinson and Hugh Gordon Holman, as well as refreshed restaurants and amenities. All 219 guest rooms—including 40 suites—have been entirely revamped, as have the rooftop bar (the Writer's Room), boardrooms and ballrooms. The ground-floor podium that connects the hotels two towers received a complete overhaul, as did the entrance, which is now adorned by an abstract bronze sculpture by artist An Te Liu.

Don't Forget the Mechanicals

When planning the renovation, managers at the Park Hyatt wanted to improve heating efficiency and reduce energy use. Armstrong Fluid Technology—a leader in demand-based control, digitalization, fluid flow, and heat transfer technology for the last 80 years—recommended replacing 1 of 2 existing pumps with a Design Envelope DEPM pump, to provide a head-to-head efficiency comparison. 

In addition to offering 24/7 service and support, Armstrong was able to provide comprehensive assistance during the design and specification phase.

Installation, set-up and commissioning all proceeded smoothly. The pump's vertical In-line design eliminated the need for inertia bases, housekeeping pads, and flex connectors while reduces piping requirements, greatly simplifying the installation process. Integrated intelligent controls eliminated the need for separate mounting of the variable frequency drive (VFD) as well as procurement, installation (including wiring), calibration and upkeep of the differential pressure sensor.

The pipe-mounted UL 778 pumping unit features:

• Ductile iron e-coated casing
• Stainless steel impeller
• Sintered silicon carbide mechanical seal
• Split-coupling design

Flow requirements were 600 GPM at 75 ft. of head.

Results Matter

The performance of Design Envelope DEPM technology, with high-efficiency motors, meant that the pump could provide the required output using a smaller motor - just 15 HP. The smaller pump (and motor) selection helped to reduce capital costs.

All told, kWh consumption was reduced from 1.66 to 0.66, an energy savings of 60%, with an annual cost savings of more than $17,000 (USD). Average annual CO2 emissions were reduced from 96,283 kg. to 80,831 kg. —a savings of 16,542 kg. And the efficiencies don't stop there.

Armstrong maps each individual pump’s hydraulic, motor and inverter variations at the factory to achieve exceptional accuracy throughout the flow range. With this calibration, Armstrong Design Envelope pumps also serve as flow meters, providing reliable system flow data (+/- 5%). The testing ensures optimal performance efficiency at start-up, while Armstrong’s Pump Manager works via an Internet connection to enhance reliability and sustain peak performance over the life of the pump.