At Home in Berks February 2017 - 8

FEATURES

EERE SUCCESS STORY
Energy-Efficient Heat Pump for Colder Regions
Keeps Residents Cozy with Lower Utility Bills
By Michael Turns, Performance Systems Development
NATIONAL LAB-INDUSTRY PARTNERSHIP
DEVELOPS NEW TECHNOLOGY, SURPASSES DOE
EFFICIENCY AND COST GOALS
Home heating is the largest energy expense for most U.S.
homeowners and accounts for nearly 30% of energy used in the
nation's residential buildings. Millions of homeowners in colder
regions of the country do not have natural gas available, leaving
furnaces to be fueled with heating oil, propane, or electricity. This
can often result in higher heating bills for homeowners.

However, soon, these 2.6 million homeowners living in cold
climates will have another, efficient home heating option. Oak
Ridge National Laboratory (ORNL), collaborating with Emerson
Climate Technologies, developed a prototype for an air-source
heat pump for the colder regions of the country-one that heats
better and uses significantly less energy.
The technology also enhances air-source heat pump efficiency
and comfort in milder climates where heat pumps are already
common, which means significant national primary energy savings
(about .04 quads annually) and greenhouse gas reductions (2.4
million metric tons annually) are possible.
TARGETING COLD CLIMATE REGIONS WITH
UNIQUE DESIGN
Air-source heat pumps (ASHPs) are well established in southern
parts of the country where winters are relatively mild. The problem
is that the heating capacity and efficiency of conventional ASHPs
decrease significantly as the outdoor temperature drops and the
demand for home heating increases. Consequently, supplemental electric resistance heat must be used, decreasing the heating
performance. In this project, ORNL researchers developed a heat
pump that minimizes the loss of heating capacity and the drop in
efficiency in low temperatures while maximizing heating comfort.
8

AT HOME IN BERKs FEBRUARY 2017


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