Credit: Stone Mountain Technologies

Lead Performer: Stone Mountain Technologies - Erwin, TN
-- A.O. Smith - Milwaukee, WI
-- Gas Technology Institute - Des Plaines, IL
DOE Funding: $903,000
Cost Share: $232,294
Project Term: March 1, 2013 - August 31, 2015
Funding Opportunity: Energy Savings Through Improved Mechanical Systems and Building Envelope Technologies 2012 (DE-FOA-0000621)

Project Objective

Stone Mountain Technologies is building and testing a packaged heat pump prototype with a nominal capacity of 80,000 British thermal units per hour at an ambient temperature of 47°F. Ideal for northern, heating-dominated climates, the heat pump will offer a simple payback, without incentives, of 3–5 years. The technology reduces heating costs by 30%–45% compared to conventional gas furnaces and boilers. The heat pump reaches a coefficient of performance of 1.4 at 47°F and 1.2 at -13°F using a simple, single-effect ammonia-water absorption cycle. The prototype will be tested over a range of ambient temperatures to verify its efficiency and manufacturing cost.


DOE Technology Manager: Tony Bouza
Performer: Michael Garrabrant, Stone Mountain Technologies

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