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Document IIF

COP improvement of two-stage ammonia heat pumps by use of ejector.

Numéro : pap. n. 27

Auteurs : BANASIAK K., HAFNER A., STEINER A.

Résumé

A feasibility study of the COP improvement in two-stage ammonia heat pumps modified with the ejector-operated economizer was carried out. A novel system architecture incorporating the ejector-driven flash gas removal from the economizer tank was discussed. A set of numerical simulations for the steady-state 0D model was carried out in order to estimate potential COP gains due to the introduced modification. The estimated COP improvement ranged between 2% and 5%, dependent on the system application (refrigeration unit or heat pump), operating conditions (evaporation temperature, condensing temperature) and ejector energy performance. Preliminary geometry sizing for the ammonia ejector was performed based on a 1D modelling approach.

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Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : COP improvement of two-stage ammonia heat pumps by use of ejector.
  • Identifiant de la fiche : 30014633
  • Langues : Anglais
  • Source : 6th Conference on Ammonia and CO2 Refrigeration Technology. Proceedings: Ohrid, North Macedonia, April 16-18, 2015.
  • Date d'édition : 16/04/2015

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