Open AccessInert Gas and Refrigerating Vapor Mass Flow Rates Ratio: A Much Promising Parameter for Diffusion-Absorption-Refrigeration Systems Performances Evaluation
Author(s) -
Djallel Zebbar,
Souhila Zebbar,
Sahraoui Kherris,
Kouider Mostefa
Publication year - 2021
Publication title -
mathematical modelling and engineering problems/mathematical modelling of engineering problems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.26
H-Index - 11
eISSN - 2369-0747
pISSN - 2369-0739
DOI - 10.18280/mmep.080212
Subject(s) - evaporator , refrigerant , refrigeration , coefficient of performance , inert gas , thermal expansion valve , thermodynamics , diffusion , mass flow , absorption refrigerator , mass flow rate , flow (mathematics) , materials science , absorption (acoustics) , volumetric flow rate , inert , mechanics , nuclear engineering , chemistry , gas compressor , engineering , physics , organic chemistry , composite material
This paper is consecrated to the thermodynamic study and analysis of diffusion-absorption-refrigeration (DAR) plants. The mass and energy balances analysis at the evaporator has allowed to highlight a new and original parameter, which can be used to analyze DAR system performances. It is the ratio of inert gas to refrigerant vapor mass flow rates at the evaporator inlets. This coefficient, which expression has been for the first time deduced mathematically, informs about the quality of the cycle and its performance, which are deeply affected by the growth of the inert gas flow energy expended to drive the refrigerant through the evaporator. The study shows that the coefficient of performance is decreasing with the increase of the mass flow rates ratio. The latter can be also used to find the optimal operating mode for the DAR machine with a specified working fluid.