Austin Energy Partners with Ameresco to Upgrade the Domain District Cooling Plant

  Austin Energy Partners with Ameresco to Upgrade the Domain District Cooling

Energy Savings Performance Contract features new chilled water storage system
             that will increase plant efficiency by shifting load

Business Wire

FRAMINGHAM, Mass. & AUSTIN, Texas -- January 8, 2013

Ameresco, Inc. (NYSE:AMRC), a leading energy efficiency and renewable energy
company, announced today that it has started work on an Energy Savings
Performance Contract (ESPC) for Austin Energy’s Domain District Cooling Plant.
The $5.2 million budget-neutral ESPC project includes the installation of a
new chilled water storage system that will help reduce the plant’s peak
electricity usage by shifting the chilled water load and associated electric
consumption from on-peak to off-peak hours.

“Austin Energy has the top performing renewable energy program along with the
first and largest green building program in the nation,” said Dennis Lilley,
Austin Energy. “Ameresco’s expertise has allowed us to continue to build on
this record of energy efficiency as we work to identify areas in which we can
lower electricity costs and reduce expenses for the City and our customers.”

As the nation’s eighth largest community-owned electric utility, Austin Energy
serves 425,000 residents in Austin, Travis and Williamson Counties. Austin
Energy’s district cooling plant installs and maintains the piping and heat
exchangers that distribute chilled water from its plant to individual
buildings via a network of underground pipes.

Prior to starting the work on the ESPC, Ameresco performed a comprehensive
audit and identified energy savings measures at the Domain District Cooling
Plant, which will include the installation of a 24,000-ton-hour chilled water
storage system large enough to shift a major portion of the chilled water load
from on-peak to off-peak over a four-hour period. The upgraded system will be
comprised of a 2.4 million (gallon) concrete thermal energy storage (TES)
tank, 92 feet in diameter by 48 feet in height. The system circulation will be
maintained by three 200 horsepower horizontal splitcase pumps controlled by
variable frequency drives.

The new energy management system will be upgraded to control and monitor the
new TES system along with upgrades to the existing plant controls. New
mechanical piping and associated mechanical devices will connect the new pumps
to the TES tank. In addition, all the existing domestic water closets,
showerheads and faucet aerators will be replaced with more efficient fixtures.

“We are excited to partner with Austin Energy to install measures that will
improve the electric load profile of the facilities and build upon their
strong history and commitment to energy conservation,” said Bob Georgeoff,
Vice President, Ameresco. “Under the ESPC model, Ameresco coordinates the
upfront project costs and the City repays that investment with their savings
over time. This model enables the City to benefit from budget-neutral upgrades
by guaranteeing a minimum level of savings over the term of the contract.”

The Domain District Cooling Plant is located in northwest Austin and provides
continuous cooling services to a mix of industrial, retail, office, and
residential customers. The project is expected to be completed by December

About Ameresco, Inc.
Founded in 2000, Ameresco, Inc. (NYSE:AMRC) is a leading independent provider
of comprehensive services, energy efficiency, infrastructure upgrades, asset
sustainability and renewable energy solutions for facilities throughout North
America. Ameresco’s services include upgrades to a facility’s energy
infrastructure and the development, construction and operation of renewable
energy plants. Ameresco has successfully completed energy saving,
environmentally responsible projects with federal, state and local
governments, healthcare and educational institutions, housing authorities, and
commercial and industrial customers. With its corporate headquarters in
Framingham, MA, Ameresco provides local expertise through its 63 offices in 34
states and five Canadian provinces. Ameresco has more than 900 employees. For
more information, visit

The announcement of a customer’s entry into a project contract is not
necessarily indicative of the timing or amount of revenue from such contract,
of the company’s overall revenue for any particular period or of trends in the
company’s overall total construction backlog.


Ameresco, Inc.
CarolAnn Hibbard, 508-661-2264
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