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Analysis of an absorption machine driven by the heat recovery on an I.C. reciprocating engine
Author(s) -
Longo Giovanni A.,
Gasparella Andrea,
Zilio Claudio
Publication year - 2005
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.1075
Subject(s) - absorption refrigerator , lithium bromide , combustor , evaporator , coefficient of performance , reciprocating motion , absorption heat pump , internal combustion engine , absorption (acoustics) , nuclear engineering , heat recovery ventilation , stirling engine , mechanical engineering , chemistry , working fluid , materials science , combustion , engineering , heat exchanger , refrigerant , refrigeration , composite material , gas compressor , organic chemistry
Abstract The present work studies an absorption machine driven by the heat recovery on an internal combustion (i.c.) reciprocating engine. The thermal energy recovered from the i.c. engine exhaust is used to drive a double‐effect water–lithium bromide cycle, while the heat recovered from the cooling jacket of the engine drives a single‐effect water–lithium bromide cycle. The two absorption cycles are integrated into a single unit with a common evaporator and absorber. The absorption unit was first evaluated by a cycle analysis determining the sensitivity to the main boundary conditions and to the internal parameters. Then a specific simulation code of all the different devices of the absorption machine was developed to evaluate the real performance and size of the unit together with its operating condition limits. The absorption machine shows a coefficient of performance around 1, very close to the performance of a traditional double‐effect absorption chiller driven by steam or by a gas burner. The absorption unit could operate with cooling water inlet temperature lower than 35–36°C and refrigerated outlet temperature higher than 3°C. Copyright © 2005 John Wiley & Sons, Ltd.