coil. Insight features the AdvantaChill system,
which combines upgrades in air flow, fans, coil
and lighting to achieve more consistent temperature performance and lower energy costs.
Another way to improve chilled cases is to use
a more eco-friendly refrigerant. Hillphoenix
offers a refrigerant called Second Nature, based
on carbon dioxide. This is used as a secondary coolant for medium-temperature systems
and a direct expansion cascade refrigerant for
low-temperature systems. Not only is Second
Nature more sustainable than conventional
refrigerant, but it also reduces refrigerant charge
requirements and leak rates, the company says.
Taking Out the Trash
Energy-efficiency operations can extend
beyond the store walls, as Kroger has proved
with its anaerobic digester program. The
retailer first debuted an anaerobic digester in
2013 at the Ralphs-Food 4 Less distribution
center in Compton, Calif., and installed a new
unit at K.B. Specialty Foods, a manufacturing
plant owned and operated by the company in
Greensburg, Ind., this January.
The initiative was part of Kroger’s Zero Hun-
ger, Zero Waste plan, and the new digester fea-
tures a “dome that captures biogas from food
byproducts at the plant and converts it into
energy through anaerobic digestion while also
improving air quality,” the company said.
According to Erin Sharp, Kroger’s group VP
of manufacturing, once the new $9.5 million
anaerobic digester—which replaced a conventional wastewater treatment system—is operating at its optimal level, it is projected to have
the capability to produce nearly 30% of the
plant’s electricity. “We invested in the digester
because it improves our sustainability performance, supports better air quality and provides
a cost savings to the company,” she said at the
time of its installation.
Top energy savings
that can be achieved
by installing the most