Effect of IHX on the energy performance of a hybrid absorption refrigeration system
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Abstract
In this work, a hybrid absorpDon refrigeraDon system (HARC) is analyzed from the point of view of the first Thermodynamic Law, where part of the condensaDon heat is recovered and supplied to the generator and then, to improve the refrigerant producDon process. For the cycle analysis, it has been considered that the condensaDon and absorber are at the same temperature (35 °C), the evaporaDon temperature of 5 °C, internal heat exchanger effecDveness ηIHX=0.5, 0.7 and 0.9, and five different pressures (Pgen = 1167, 889, 778, 687 y 584 kPa) in the generator were analyzed.
The results show that the temperature in the generator decreases up 23.8 °C when the pressure is reduced from 1167 kPa to 584 kPa and the COP can be increased up in 3.30%. The increasing of the generator temperature increases the cooling capacity between 3.6-6.68% when the system operates at internal heat exchanger of 0.9 and generator temperature of 100 °C. Finally, this kind of system can be a good alternaDve for solar energy applicaDons (solar collectors), since acDvaDon temperatures can be lower than 70 °C.
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