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A comparative study of an absorber heat recovery cycle for solar refrigeration using NH 3 ‐refrigerant with liquid/solid absorbents
Author(s) -
Kaushik S. C.,
Kumar Rajesh
Publication year - 1987
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/er.4440110111
Subject(s) - refrigerant , coefficient of performance , condenser (optics) , absorption refrigerator , heat pump and refrigeration cycle , materials science , thermodynamics , refrigeration , thermodynamic cycle , absorption (acoustics) , heat pump , absorption heat pump , nuclear engineering , heat exchanger , composite material , engineering , optics , light source , physics
This paper presents an investigation on using an ammonia refrigerant with liquid/solid absorbents in an absorber heat recovery cycle where heat released during the absorption process is used to heat up the strong solution coming out of the absorber, thereby reducing the generator heat input and hence improving the coefficient of performance. A comparative thermodynamic study is made with NH 3 ‐H 2 O and NH 3 ‐LiNO 3 pairs as working fluids for both conventional absorption and absorber heat recovery systems. It is found that an improvement of about 10 per cent in COP for the absorber heat recovery cycle is achieved over the conventional absorption cycle and the NH 3 ‐LiNO 3 system yields a higher COP than for NH 3 ‐H 2 O over a wide range of generator temperatures and condenser/absorber temperatures. A detailed parametric study is also presented in this paper.