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Un nouveau système frigorifique à absorption [piloté] par de la chaleur à basse température avec des [paires actives] de LiCl--H2O et LiBr--H2O.

A novel low-grade heat-driven absorption refrigeration system with LiCl–H2O and LiBr–H2O working pairs.

Auteurs : SHE X., YIN Y., XU M., et al.

Type d'article : Article, Article de la RIF

Résumé

A novel low grade heat-driven absorption refrigeration system is proposed, where LiCl–H2O with higher vapor pressure is used in the high-pressure cycle and LiBr–H2O with lower vapor pressure is employed in the low-pressure cycle. Effects of key parameters on the system performance are analyzed, and different heat source utilization modes are considered: parallel modes (PM-1 and PM-2) and serial mode (SM). What's more, comparisons among the PM-1, PM-2, SM and the traditional double-stage LiBr–H2O absorption system (TDS) are made. Results show that the PM-1 has much higher COP than the TDS under small ranges of working conditions, with the maximum COP improvement 26.7%, while the PM-2 shows prominent advantages under wider ranges, with the maximum COP improvement 35%. In addition, The PM-1 shows much higher COP than the SM under higher condensing temperature and evaporation temperature, while the SM has much lower heat source outlet temperature which is at most 12 °C lower than that of the PM-1. The intermediate pressure is important for the system performance and the optimum value is 2.27 kPa in the PM-1 and 2.5 kPa in the SM. For the PM-2, the intermediate pressure should be chosen to achieve low circulation ratio in the low pressure cycle.

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Format PDF

Pages : 219-234

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : A novel low-grade heat-driven absorption refrigeration system with LiCl–H2O and LiBr–H2O working pairs.
  • Identifiant de la fiche : 30015713
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 58
  • Date d'édition : 10/2015

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