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Analyse des performances d'un nouveau système frigorifique à compression-absorption-résorption sans cascade assisté par un éjecteur.

Performance analysis of a novel ejector-assisted non-cascading compression-absorption-resorption refrigeration system.

Numéro : 2235

Auteurs : KUMAR A., MODI A.

Résumé

A refrigeration system utilizing heat to deliver cooling is among the best choices for process cooling and cold storage applications. The conventional absorption refrigeration system (ARS) is a heat driven refrigeration technology. However, the single-effect ARS has a low coefficient of performance (COP), whereas the double and triple effect systems operate at higher generator temperatures and are bulkier in size. This study proposes a novel ejector-assisted singleeffect ammonia-water compression-absorption-resorption refrigeration system. An ejector is integrated to boost the absorber pressure and a compressor is used to increase the pressure of ammonia vapor at the desorber exit. The proposed single-effect system delivers two simultaneous refrigerating effects at −5 °C and 7 °C to the end-users without cascading. For a specific high pressure, the low pressure is varied in the feasible operating range, and a parametric analysis is performed to study the effect of the system compression ratio on the system performance (COP). The results indicate that at Ph = 14.5 bar, the proposed system attains a maximum COP of 0.98 at an absorber temperature of 40 °C and a generator temperature of 100 °C. In order to study the influence of the various operating parameters, the COP is calculated at the different absorber, desorber, and generator temperatures. The proposed system utilizes heat to deliver refrigerating effect at −5 °C, which saves electricity consumption by 36 % compared to a conventional vapor compression system.

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Pages : 10 p.

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Détails

  • Titre original : Performance analysis of a novel ejector-assisted non-cascading compression-absorption-resorption refrigeration system.
  • Identifiant de la fiche : 30030620
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 2022

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