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Modèle de calcul optimal pour un cycle frigorifique biétagé à absorption de LiBr/H2O, à des pressions intermédiaires.

Intermediate pressure optimum mathematical calculation model in the two-stage LiBr/H2O absorption refrigeration cycle.

Auteurs : HE J., WANG D., YAN L.

Résumé

Analyzing traditional thermodynamic calculation method and its disadvantage, a new method to determine thermodynamic cycle is presented by calculating intermediate pressure in two-stage LiBr refrigerating cycle. A calculation model of intermediate pressure is introduced. The influence of heat source temperature, cooling water temperature and cool medium water temperature is individually analyzed with analogue computing. Regarding the highest heat ratio of refrigerating cycle as the objective function, the weighted coefficients of various factors are determined by an optimization method, and an optimum model for calculating the intermediate pressure in a two-stage LiBr refrigerating cycle is proposed. As a result, the thermodynamic calculation of the two-stage LiBr refrigerating cycle may be simplified and optimized. Therefore, under the same cold and heat sources, the heat ratio in the thermodynamic cycle with the intermediate pressure in the two-stage LiBr refrigerating cycle is always the highest one.

Détails

  • Titre original : Intermediate pressure optimum mathematical calculation model in the two-stage LiBr/H2O absorption refrigeration cycle.
  • Identifiant de la fiche : 2006-2346
  • Langues : Anglais
  • Source : Cryogenics and refrigeration. Proceedings of ICCR 2003.
  • Date d'édition : 22/04/2003

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