New high temperature absorbent for absorption heat pumps. Final report

Technical Report · Thu May 01 04:00:00 EDT 1986

OSTI ID:5638877

Davidson, W F; Erickson, D C

A new absorption working pair (AWP) for absorption heat pumps has been identified which provides higher temperature capability (260/sup 0/C), higher lifts, and use of lower cost construction materials, than currently available absorption heat pump working fluid pairs (e.g., LiBr-H/sub 2/O). Using water as working fluid, the absorbent is a ternary mixture of LiNO/sub 3/, KNO/sub 3/, and NaNO/sub 3/ in the preferred proportions of 53, 28, and 19 weight percent, respectively. In addition to being thermally stable above 260/sup 0/C, it promotes the formation of a passive and protective corrosion resistant oxide film on both mild steel and all stainless steels. The thermodynamic, corrosion, and stability properties of this new absorbent have been measured. At temperatures of 260/sup 0/C and higher the absorbent has negligible thermal decomposition, has corrosion rates less than 1 mil/year for both carbon steel and austenitic stainless steel, and provides practical heat pumping lifts of up to 90/sup 0/C.

• Research Organization: Energy Concepts Co., Annapolis, MD (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5638877
• Report Number(s): ORNL/Sub-85-22013/1; ON: DE86012483
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
BROMIDES
BROMINE COMPOUNDS
COMPARATIVE EVALUATIONS
CORROSION PROTECTION
DISPERSIONS
ECONOMICS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HEAT PUMPS
LITHIUM BROMIDES
LITHIUM COMPOUNDS
LITHIUM HALIDES
LITHIUM NITRATES
MIXTURES
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE
POTASSIUM COMPOUNDS
POTASSIUM NITRATES
SODIUM COMPOUNDS
SODIUM NITRATES
SOLUTIONS
STABILITY
WORKING FLUIDS