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An improved absorption refrigeration cycle driven by unsteady thermal sources below 100°C
Author(s) -
Wang J. F.,
Gao G. C.,
Chen G. M.
Publication year - 2000
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/1099-114x(20000610)24:7<633::aid-er618>3.0.co;2-k
Subject(s) - refrigerant , refrigeration , absorption refrigerator , evaporation , thermodynamics , condensation , absorption (acoustics) , nuclear engineering , thermal , materials science , environmental science , chemistry , engineering , heat exchanger , physics , composite material
This paper deals with an improved absorption refrigeration cycle with staged absorption. Instead of having only one absorber, the improved cycle uses a series of absorbers among which one is cooled by the external medium and the others are cooled by refrigerant at staged pressures between the evaporation pressure and condensation pressure. Ammonia–lithium nitrates (NH 3 –LiNO 3 ) are selected as the working fluids and the calculation results for the two‐staged cycle and the three‐staged cycle are analysed in detail. It is demonstrated that the improved cycle is able to steadily run when driven by low‐grade thermal sources as low as 65°C, and to produce deep refrigeration temperature as low as −40°C. Copyright © 2000 John Wiley & Sons, Ltd.