Experimental Comparison of Ammonia-Water and Ammonia-Water Lithium Bromide Mixtures in an Absorption Heat Pump.
Experimental Comparison of Ammonia-Water and
Ammonia-Water Lithium Bromide Mixtures in an Absorption
Heat Pump.
(1203 K)
McLinden, M. O.; Radermacher, R.
HI-85-36 No. 4;
ASHRAE Technical Data Bulletin (p. 52-60) AND ASHRAE
Transactions, Vol. 91, No. 2B, 1837-1846, June 1985.
Keywords:
heat pumps; ammonia; water; lithium; mixtures;
absorption; bromide; pressure; temperature refrigerants;
experiments; mixtures
Abstract:
The performance of an absorption heat pump (AHP)
operating with ammonia-water and ammonia-water-lithium
bromide mixtures is compared. The AHP was designed for
the ammonia-water system but operated
successfully and without modifications with the ternary
system. The pressures and most of the temperatures
showed only minor differences. The COP of the AHP
operating with a ternary mixture having a LiBr/H20 mass
ratio of 0.48/0.52 was, on average, 0.05 lower than with
the binary system. However, several factors indicated
that the refrigerant vapor entering the rectifier had
significantly lower water content with the ternary
system, as
predicted in the literature.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899