CFD simulation approved by an experimental validation of the diffusion absorption refrigeration system evaporator

•A numerical investigation of an evaporator of a diffusion-absorption-refrigeration system using computational fluid dynamics (CFD).•The CFD modelling is conducted by CONVERGE CFD software and was experimentally validated.•The study provides a deeper understanding of the evaporation process in DAR s...

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Bibliographic Details
Published in:International journal of refrigeration 2024-05, Vol.161, p.202-209
Main Authors: Rahmani, Zakaria, Zebbar, Djallel, Mostefa, Kouider, Kherris, Sahraoui
Format: Article
Language:English
Subjects:
Absorption
Ammonia
Ammoniac
CFD CONVERGE
CONVERGE CFD
Diffusion
Evaporator
Hydrogen
Hydrogène
Logiciel de
Évaporateur
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Summary:•A numerical investigation of an evaporator of a diffusion-absorption-refrigeration system using computational fluid dynamics (CFD).•The CFD modelling is conducted by CONVERGE CFD software and was experimentally validated.•The study provides a deeper understanding of the evaporation process in DAR systems.•The study examined also the impact of ammonia presence at the hydrogen inlet on temperature distribution and overall, the accuracy of the CFD model.•The present study emphasizes the significance of utilizing CFD simulation to analyse and improve numerous processes, thus boosting the overall performance of the DAR system. The evaporation process has a considerable impact on the operation of a diffusion absorption refrigeration system (DAR). However, there have been few studies that have focused on this specific issue. In this paper, a numerical investigation of the evaporator region in a DAR system was conducted using CONVERGE CFD software and the RANS approach. The aim of this study is to validate an accurate CFD model by analysing the flow behaviour and thermal parameters within the evaporator. The computational results show high agreement with the experimental data, with slight deviations often remaining under 3 %. The current study additionally investigated the effect of ammonia presence at the hydrogen inlet, specifically at 5 % and 10 % ratios. The results demonstrate that the average deviation is less than 1 % when using 5 % ammonia. This study sheds light on the evaporation process, which is important for enhancing the design and operational efficiency of DAR systems. For this purpose, the validated numerical model will be of great use.
ISSN:0140-7007
1879-2081
DOI:10.1016/j.ijrefrig.2024.02.021