New high temperature absorbent for absorption heat pumps. Final report
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
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HEAT PUMPS
WORKING FLUIDS
AQUEOUS SOLUTIONS
COMPARATIVE EVALUATIONS
CORROSION PROTECTION
ECONOMICS
LITHIUM BROMIDES
LITHIUM NITRATES
MIXTURES
PERFORMANCE
POTASSIUM NITRATES
SODIUM NITRATES
STABILITY
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
DISPERSIONS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
LITHIUM COMPOUNDS
LITHIUM HALIDES
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
SODIUM COMPOUNDS
SOLUTIONS
320100* - Energy Conservation
Consumption
& Utilization- Buildings