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Document IIF

Analyse de l'utilisation d'un cycle coabsorbant à étage de pression à effets multiples et à eau-bromure de lithium pour le conditionnement d'air.

Use analysis of water-lithium bromide multi-effect pressure-stage coabsorbent cycle in air conditioning.

Auteurs : STAICOVICI M. D.

Résumé

This paper shows how the recent coabsorbent and the mature air conditioning technologies could be linked for the latter benefit. The coabsorbent chillers base on 3- to 5-effect H2O-LiBr absorption and hybrid pressure-stage cycles. The air conditioning at hand is modeled from the heat exchange and thermodynamic point of view, with a classic flow chart. The heat exchange model results show that it is possible to replace the classic condensing subcycle of a pressure-stage cascade by a nontruncated coabsorbent subcycle. The thermodynamic model results are given in a tabular form for different air conditioner temperature pinch values [small (2.5-3ºC), average (5ºC) and average-high 8ºC)], fresh air fractions (0.1 to 1.0) and typical dry-warm and humid-warm climates. The chilling COP increases with the temperature pinch decrease from 8 to 2.5-3.0°C. Keeping this temperature pinch within 5 to 8°C would ensure feasibility, enjoying a cooling effectiveness increase by cca. 50 to 100% and more, as compared to the today air conditioning based on 2- and 3-effect condensing cycles with H2O-LiBr. Unlike the existing technology, in our case it is possible to save comparatively up to 60 and 100% primary energy in case of the two considered climates, when the fresh air fraction increases and covers the whole range.

Documents disponibles

Format PDF

Pages : 965-975

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Use analysis of water-lithium bromide multi-effect pressure-stage coabsorbent cycle in air conditioning.
  • Identifiant de la fiche : 30001301
  • Langues : Anglais
  • Source : Sources/sinks Alternative to the Outside Air for Heat Pump and Air-conditioning Techniques (Alternative Sources - AS), Padua, Italy, April 5-7, 2011. / International Sorption Heat Pump Conference (ISHPC11), Padua, Italy, April 6-8, 2011.
  • Date d'édition : 06/04/2011

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