This can include green electricity from your
supplier and incorporating renewable energy
sources including waste heat, municipal
refuse, biomass, etc. Consider partnering
with a biofuels supplier that can provide
biodiesel or ethanol on a continuing basis.
Quantify the cost of providing a portion of
your energy to customers from renewable
energy sources; and develop tariffs that will
allow customers to choose green energy
Third, revisit your promotional/educa-tional materials and be prepared to inform
the community, customers, government
officials and your energy suppliers about
the benefits of district heating and cooling.
Emphasize fuel flexibility, centralized emis-
sions control, fuel-use efficiency and reduced
customer environmental concerns. Point out
the convenience of district heating and
cooling energy delivered to a high-efficiency
building, and the customer benefit of using
district energy year-round without concern
for boiler and chiller operation.
Finally, meet with mayors, college
presidents, legislators and community policy
makers and become part of the zero energy
building team. Take a proactive approach in
supporting building net zero energy use.
Renewed interest in building energy conservation and commitment to renewable
energy sources offers the district heating
and cooling industry the opportunity to
excel as the preferred renewable energy
resource provider for existing and new
David W. Wade, PE, , is
president of RDA Engineering
Inc. in Atlanta and has been
an IDEA member for more
than 20 years. He has served
on IDEA’s board and is a past
chair of ASHRAE’s national
technical committees dealing
with Building Steam and Hot Water Systems
and District Heating and Cooling. Wade may be
reached at email@example.com.
Column and previous columns available at
flagship retail store plus a six-story, 285,000-
sq-ft office tower with space for up to 500
company employees and other tenants. The
project was built by Schlosser Development
Corp. after years of planning and negotiations
involving Whole Foods and also Austin Energy.
This site marks the entrance to Austin’s
Market District, an area featuring chic urban
living, shopping and dining in the heart of
downtown. Reflecting a healthy lifestyle of all
ages, the new retail site is just a few blocks
from the original store location but features a
vast array of natural and organic foods as well
Courtesy Schlosser Development.
Whole Foods Market® is the world’s leading as an esoteric selection of wines and cheeses.
retailer of organic and natural foods, with 194 The design of the campus blends the com-stores in North America and the United Kingdom. pany’s and community’s values and culture.
In 2005, the company dedicated its new world It includes a venue for live music as well as
headquarters campus in Austin, Texas. The pedestrian-friendly access – and, of course,
campus, which is served by Austin Energy, is district cooling! The developer and tenant both
home to Whole Foods Market’s 85,000-sq-ft wanted to avoid the risks and aesthetic issues
associated with a self-provided
cooling plant while enjoying the
benefits of increased reliability
and better space utilization.
The building’s air-conditioning
and commercial refrigeration
systems (walk-in coolers, freezers and meat cases) are connected to Austin Energy’s system. The
traditional air-cooled condensing units normally associated
with commercial refrigeration
were eliminated in favor of
Whole Foods Market’s world headquarters campus in Austin, Texas using the chilled-water return
One Cool Market:
Whole Foods Market®
from the building’s cooling system. The return
water at 55-60 degrees F is quite cold and effective at removing heat and allows for higher efficiencies compared to air-cooled condensers.
Adding this extra heat to the chilled-water
return loop increases the site’s delta T (i.e., the
temperature difference between chilled water
supplied to the building and chilled water
returned from the building), which is favorable
for improving the pumping efficiency of Austin
Energy’s district cooling system. (Another
Austin Energy customer, the Hilton Hotel, is
also using district cooling in lieu of air-cooled
condensers as a preferred option to reject heat
from its kitchen refrigeration equipment.)
Schlosser Development Corp., Whole Foods
and Austin Energy are considering implementing
similar district energy solutions at another Whole
Foods store planned at the Domain, a retail
center in North Austin. Austin Energy has another
district cooling system at the Domain, which
currently serves a new mall as well as residential,
office and industrial customers.
By working collaboratively, the three parties
will each make significant contributions toward
achieving a more sustainable energy future.
For more on Austin Energy, contact Cliff
For lists of other buildings using district energy
service, see the District Energy Space section of IDEA’s
Web site at www.districtenergy.org/de_space.htm.