Case StudyAugust 2016

ChallengeParkway Properties was challenged with making the twenty-

five-year-old One Orlando Centre, with original HVAC systems,

compete head-to-head with the newly constructed building

market. Although prior retrofits, including a T-8 lighting

conversion, reduced energy consumption, the building was

experiencing gross inherent inefficiencies compared to current

systems and design standards. Issues included garage roof

and 18th floor chiller plants, which were never connected

properly to enable optimized performance, and inconsistent

temperatures compromising comfort and the working

environment for tenants.

SolutionImpressed with the customizable solution presented by Trane,

Parkway Properties selected the company for its upgrade

project. Trane began by performing TRACE™ 700 modeling

and field testing to determine the effects of integrating

the building's two chiller plants. It was determined that

connecting the plants and optimizing the pumping strategy

would significantly reduce the connected load and improve

energy performance. The two chiller plants were re-piped into

a variable primary flow loop, allowing the system to reduce

pump horsepower and eliminate several chiller water pumps.

New cooling tower technology uses a fan array concept that

Parkway Properties is a real estate investment trust that owns and operates high quality office properties located in top-tier Sunbelt markets. A proud member of the New York Stock Exchange, Parkway focuses on providing exceptional service and innovative workplace solutions. It's the day-to-day attention to detail in the way they serve customers, enhance assets, and invest capital that makes the difference, and allows Parkway to create long-term value for its shareholders.

One Orlando Centre features on-site property management, twenty-four hour security, a full-service bank, a café, and panoramic views in the heart of downtown Orlando.

One Orlando CentreChiller plant integration, controls upgrade result in projected savings of 34 percent in energy use and 1.5 M gallons of water annually • Orlando, Florida

further reduces connected kW, an ability to recapture (water)

drift, and incorporates a near zero bleed water treatment.

Improving efficiency and redundancy

Two 375-ton Trane® Series S™ CenTraVac™ chillers deliver

optimal performance to keep tenants comfortable. For

increased redundancy, a 300-ton Trane Stealth™ air-cooled

chiller was also installed to handle peak and night loads.

Featuring AdaptiSpeed™ technology, the integration of a

direct-drive compressor, a permanent magnet motor, and third

generation Adaptive Frequency™ drive (AFD₃), the chillers

provide industry leading efficiencies and ultra quiet operation.

Ingersoll Rand (NYSE:IR) advances the quality of life by creating comfortable, sustainable and e�cient environments. Our people and our family of brands—including Club Car®, Ingersoll Rand®, Thermo King® and Trane®—work together to enhance the quality and comfort of air in homes and buildings; transport and protect food and perishables; and increase industrial productivity and e�ciency. We are a $13 billion global business committed to a world of sustainable progress and enduring results.

We are committed to using environmentally conscious print practices.

trane.com ingersollrand.com

Controlling and monitoring building systems

Building operators use a Trane® Tracer™ SC building

automation system (BAS) to control and monitor HVAC,

lighting and other systems, from virtually anywhere, using

Web-connected devices, such as tablets and smartphones.

Tracer SC enables optimal start/stop scheduling, night setback,

chiller plant control, fan and pump pressure optimization,

reporting and alarm notifications. Tracer™ ES, a Web-based

systems integration solution, gives Parkway Properties an

online, enterprise-wide view of multiple properties and

systems, from any PC or mobile device on the network. The

customizable system lets managers perform daily operations

such as scheduling, alarm management and troubleshooting;

enables better decision making and faster issue response; and

allows tracking and analysis of all their buildings over time.

Utilizing reliable, wireless technology

Trane® Air-Fi™ wireless technology eliminates communication

wires between the BAS, unit controllers and zone sensors,

reducing controls installation costs. The wireless solution

provides twice the signal range of other wireless systems and

offers flexibility to reconfigure space for changing occupant

needs. Air-Fi's redundant, self-repairing mesh technology helps

ensure reliable communication, automatically rerouting around

obstacles to avoid disruption of building operations.

ResultsBy inter-connecting the two chiller plants and optimizing

the pumping strategy, Parkway Properties has been able to

significantly reduce its connected load at One Orlando Centre

by approximately 467 kW. New cooling towers incorporate a

near zero bleed water treatment program, with first year actual

savings of approximately 1.5 M gallons of water per year.

Trane® Series S™ CenTraVac™ and Stealth™ air-cooled chillers

have increased redundancy, and operate quietly and reliably

to create a comfortable environment. Using a Tracer SC BAS,

Parkway Properties has been able to further reduce energy

consumption and carbon footprint, and keep a watchful eye on

issues that could compromise tenant comfort.

A 34 percent average energy use savings has been achieved in

the first twelve months actuals. Parkway Properties continues

to monitor results, using multiple Intelligent Services: Trane

Building Performance to analyze system performance; Trane

Energy Optics™, which uses utility interval data to show usage

trends and identify needed adjustments; and Trane Energy

Performance, a cloud-based online dashboard to provide

visualization of energy use, enabling implementation and

validation of demand reduction strategies to sustain savings

and support the discovery of improvement opportunities.

Two 375-ton Trane Series S™ CenTraVac™ chillers installed in the 18th floor chiller plant deliver best-in-class full-and part-load efficiencies.

©2016 Ingersoll Rand CASE-SLX411-EN August 09, 2016