Title: Exergetic design of hydrogen-based thermally driven R717 absorption refrigeration system

Authors: Nizar Ben Ezzine; Raoudha Garma; Monia Chatti; Ahmed Bellagi

Addresses: Faculty of Sciences of Bizerte, University of Carthage, 7021 Zarzouna, Tunisia; LRTTPI, National Engineering School of Monastir, University of Monastir, Av. Ibn Jazzar, 5060 Monastir, Tunisia ' LRTTPI, National Engineering School of Monastir, University of Monastir, Av. Ibn Jazzar, 5060 Monastir, Tunisia ' LRTTPI, National Engineering School of Monastir, University of Monastir, Av. Ibn Jazzar, 5060 Monastir, Tunisia ' LRTTPI, National Engineering School of Monastir, University of Monastir, Av. Ibn Jazzar, 5060 Monastir, Tunisia

Abstract: In this work, a new configuration of the hydrogen-R717-water diffusion-absorption refrigeration cycle is proposed, investigated and compared to the basic standard Platen-Munters configuration by numerical simulation. Basing of the results of the exergy analysis, the original cycle is modified by incorporating components for internal rectification heat recovery. The calculations show that the performances of the modified cycle are largely improved: a minimum evaporation temperature of -24°C can be reached with a COP of 0.38, exceeding 50% the performances of the basic refrigerator under similar operating conditions.

Keywords: diffusion-absorption refrigeration; exergy analysis; enhanced design; internal heat recovery.

DOI: 10.1504/IJEX.2023.128786

International Journal of Exergy, 2023 Vol.40 No.2, pp.212 - 227

Received: 01 Nov 2021
Received in revised form: 01 Aug 2022
Accepted: 07 Aug 2022
Published online: 03 Feb 2023 *

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