Affiliation(s)
1. Dept. of Applied Physics, Faculty of Applied Sciences and Technology, Gaston Berger University, Saint-Louis BP 234, Senegal
2. Efficiency and Energy Systems Research Team, Alioune Diop University, Bambey BP 30, Senegal
ABSTRACT
Absorption chillers are cooling units usually powered by renewable
energy or waste heat. Their performance generally depends on the temperatures
of the heat source, the ambient and the medium to be cooled. The present work
deals with the thermodynamic study of a 10 kW NH3/H2O
absorption machine in order to find the COP (coefficient of performance). The
first and second laws of thermodynamics were used for the operating conditions.
The thermodynamic properties of the NH3/H2O mixture were
determined using the EES (Engineering Equation Solver) software. The results of
the simulation of the machine were validated with the results of the
literature. After validation, the program was used to simulate a 10-kW NH3/H2O
absorption machine for milk conservation/cold storage in northern Senegal. The
simulation results of the 10-kW ammonia-water absorption machine give an
acceptable COP of 0.521 with a milk storage temperature of 4 °C.
KEYWORDS
Absorption, ammonia-water, COP, EES.
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