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HCFC22‐based vapour absorption refrigeration systems. Part II: Influence of component effectiveness
Author(s) -
Fatouh M.,
Murthy S. Srinivasa
Publication year - 1996
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/(sici)1099-114x(199605)20:5<371::aid-er152>3.0.co;2-#
Subject(s) - absorption refrigerator , refrigerant , heat exchanger , thermodynamics , materials science , refrigeration , absorption (acoustics) , working fluid , composite material , physics
A thermodynamic analysis was performed on a single‐stage vapour absorption refrigeration system (VARS) operating with monochlorodifluouromethane (HCFC22) as a refrigerant and dimethylether of tetraethyleneglycol (DMETEG) or dimethyl acitamide (DMA) as a working fluid. Influence of solution heat exchanger effectiveness ( E h ) and mass transfer effectivenesses of absorber ( E a ) and generator ( E g ) on the performance of VARS were studied. The variations in heat quantities at solution heat exchanger, generator and absorber as well as performance characteristics, namely CR, COP th and second law efficiency (ϵ) at various operating temperatures are reported. As expected, low CR and high COP th and ϵ can be obtained at high values of E h , E a and E g . The effects of E h on the performance is more pronounced when compared to that of E a and E g . Also, the change in the circulation ratio ( CR ) due to a given change in E a is higher than that due to the same change in E g . CR is not a function of E h . A comparison of the influence of E h , E a , and E g on the VARS performance for HCFC22‐DMA and HCFC22‐DMETEG pairs was made.