Theoretical and Experimental lnvestigation on the Absorption Refrigeration Systems.

Document Type : Research Studies

Authors

1 Mechanical Power Engineering., Faculty of Engineering., Tanta University., Tanta., Egypt

2 Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt

3 Mechanical Power Engineering., Tanta University., Tanta., Egypt

4 Egyptian Natural Company

Abstract

In the present work, a theoretical model is developed to study the single-effect absorption refrigeration cycle from the thermodynamic point of view for lithium bromide-water pair und lithium chloride-water pair. The effect of different operating (temperatures on the coefficient of performance (COP) and low ratio (FR) (the weak solution mass flow rate with reference to the refrigerant 113ss low rule) are investigated. This generation process in cui absorption refrigeration cycle using lithium chloride-Water solution is the working pair is experimentally studied. From the theoretical study, it is found that the COP increases an  within increases in generation temperature until a certain value, then it decreases slightly. The COP increases with an increase in evaporator temperature and decrease in condenser or absorber temperatures. The rule of decrease in FR is higher at higher condenser and absorber temperatures. The data obtained for lithium bromide-water pair is compared with lithium chloride-water pair it is found that the COP is higher for lithium chloride-water pair than that for lithium bromide-water pair and the FR is lower for the lithium chloride-water pair. The experimental results are plotted to illustrate the effect of generation temperature on the coefficient of performance. low ratio and output variables. Also, the effect of the inlet solution temperature, inlet solution low rate and generator  pressure on the generated water Vapor is discussed. A minimum generation temperature must be chosen to boil oil this water from the lithium chloride-water solution. from the measured data a maximum coefficient of performance of 0.812 can be obtained for it single stage system. 

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