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Absorption cooling systems are more environment
friendly, capable of utilizing low grade heat. By consuming very
small electric power, the half-effect absorption chillers can be
driven by low temperature solar energy.
The half-effect absorption cooling system contains five
temperature levels and three pressure levels. For a given set of
generators, evaporator, condenser and absorbers temperatures,
the intermediate pressure (Pi) must be optimized to get a
maximum coefficient of performance ‘COP’ and exergy
efficiency of the system. The energy and exergy analysis is
carried out for each component of the half-effect absorption
cooling system. All exergy flows within the system are calculated.
The flow rate ratio, the coefficient of performance and the exergy
efficiency of the system are estimated. The effect of generator
temperature, absorber temperature and condenser temperature
are analyzed for a commonly used chilled water temperature
(12°C/7°C).
New analytical expression of the intermediate pressure is
developed. The derived correlation can help the researchers to
predict the values of the intermediate pressure of the half-effect
absorption cooling system before carrying out their experiments
1.st International Conference Energy Systems Engineering
ıcese'17
Rabah Gomri
Khellaf Nabil