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Optimal performance of double‐effect series flow vapour absorption refrigeration systems with new working fluids
Author(s) -
Arun M. B.,
Maiya M. P.,
Murthy S. Srinivasa
Publication year - 1998
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(199809)22:11<1001::aid-er428>3.0.co;2-c
Subject(s) - evaporator , condenser (optics) , refrigeration , refrigerant , absorption refrigerator , heat exchanger , thermodynamics , coefficient of performance , thermal expansion valve , nuclear engineering , chemistry , generator (circuit theory) , materials science , engineering , light source , power (physics) , physics , optics
In a double‐effect series flow vapour absorption refrigeration system (VARS), an optimum value of the low‐pressure generator temperature exists at which all the vapour generated at the high‐pressure generator is condensed. At these conditions, a comparative study of the performance of VARS using environment friendly refrigerants such as, R32, R134a, and R124 with N,N′‐dimethyl acetamide (DMAC) as the absorbent is made. It is found that the system with R32‐DMAC gives the best performance at high evaporator temperatures. R124‐DMAC may be preferred at extreme operating conditions like low evaporator and high heat rejection temperatures. Influence of operating temperatures (high‐pressure generator, evaporator, condenser and absorber) and the effectiveness of heat exchangers on the optimum low‐pressure generator temperature, cut‐off temperature, circulation ratio and coefficient of performance are studied. © 1998 John Wiley & Sons, Ltd.