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Neil P. Leslie, P.E., Gas Technology Institute
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Paul Glanville, P.E., Gas Technology Institute
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Hillary Vadnal, Gas Technology Institute
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Michael Garrabrant, Stone Mountain Technologies, Inc.
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Roger Stout, Stone Mountain Technologies, Inc.
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Approximately half of water heaters sold in the U.S. and Canada for residential applications are natural gas fired storage water heaters, and for these products the maximum steady state thermal efficiency of available products is approximately 96%, with transient rated efficiencies much lower. To move beyond the thermal efficiency limits of standard condensing-efficiency residential gas water heating equipment, this paper describes an effort to develop an economic gas-fired ammonia-water absorption heat pump deployed as a packaged storage water heater.
