Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
NUMERICAL EVALUATION FOR ABSORPTION CHILLER WORKING WITH WATER-AMMONIA BY COMPUTATIONAL FLUID DYNAMICS
Submission Author:
Álvaro Augusto Soares Lima , RN
Co-Authors:
Álvaro Augusto Soares Lima, Carlos Antonio Cabral Santos, Alvaro Antonio Ochoa Villa, JOSÉ ÂNGELO PEIXOTO DA COSTA
Presenter: Álvaro Augusto Soares Lima
doi://10.26678/ABCM.COBEM2019.COB2019-1982
Abstract
Absorption refrigeration systems have been gaining more space in companies and research groups because of their low power consumption, their main advantage over conventional systems. The present work has the objective of performing a numerical analysis in a flat plate type absorber with the flow of the absorbent solution and refrigerant vapor in direct contact and occurring from the top to the bottom surface of the absorber. The absorption capacity of the absorber will be evaluated by making use of the ammonia/water working pair. For this purpose, the CFX computational fluid dynamics software of the company ANSYS was used to solve the equations of mass, energy, momentum conservation, besides the correlations that describe the phenomena of heat and mass transfer. The parametric analysis was performed by varying the flow of refrigerant vapor. At the end of the study the results showed that the increase of the refrigerant vapor flow by 10% led to an increase in the mass fraction of the solution by only 1%. The result also showed that a geometric optimization of the absorber is possible for the studied conditions.
Keywords
CFD, absorption chiller, Ammonia-water
