Thermodynamic Design of 10 TR Single-Effect LiBr-H2O Absorption Refrigeration System
Abstract
The use of energy, which is perceived as a key element in the development of civilization and is necessary for all aspects of modern life, is one of the measures of the country's growth. Due to the high costs of conventional energy sources as well as the possibility of their depletion, it has become necessary to look for new and direct sources of energy. As a result, thinking began to return to absorption cooling systems due to their ability to work using direct thermal energy. Apart from their simplicity and lack of moving parts, absorption cooling systems are commonly used because they can operate by a heat source with relatively low temperatures, such as those generated by burning natural gas or by solar collectors, to produce a refrigeration effect directly by evaporating the refrigerant. This article presented a thermodynamic design of (10 TR) single-effect (LiBr/ H2O) absorption refrigeration system. The capacity of the evaporator (35.17 KW) was used to determine the operating parameters for each component. Thermodynamic simulations are carried out on the basis of experimental correlations. To determine the various operational parameters of a vapor absorption refrigeration system under various operating conditions, a MATLAB code was developed. The effectiveness of the solution heat exchanger and the various temperatures of the generator, condenser, evaporator, absorber, are taken into consideration when calculating the coefficient of performance. The results obtained prove that the coefficient of performance increases by increasing the effectiveness of solution heat exchanger, generator and evaporator temperatures, and decreases by increasing absorber and condenser temperatures.
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