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Simulation des performances d'un système de séchage avec pompe à chaleur ayant recours au R744 en guise de frigorigène.

Performance simulation of a heat pump drying system using r744 as refrigerant.

Numéro : pap. 1037

Auteurs : BANTLE M., KVALSVIK K. H., TOLSTOREBROV I.

Résumé

Drying is an energy intensive thermal process. The specific energy consumption in industrial systems is normally higher than 0.8 kWh/kg of evaporated water and the thermal energy demand in most drying systems is provided through burning of fossil fuels. The potential of using R744 (CO2) as working media in a heat pump drier was investigated for a drying process at 45°C, 60°C and 70°C. The trans-critical temperature glide of CO2 reduces the large temperature differences during re-heating of the drying air. The obtained Coefficients of Performance were between 3.4 and 4.3 resulting in specific energy consumption in the range of 0.24 to 0.27 kWh/kg of evaporated water for the different drying processes. The simulations confirm that heat pump assisted drying has the potential to reduce the energy demand by around 70% in general and shows the feasibility of applying heat pump drying also at drying conditions up to 70°C.

Documents disponibles

Format PDF

Pages : 8 p.

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 : Performance simulation of a heat pump drying system using r744 as refrigerant.
  • Identifiant de la fiche : 30019096
  • Langues : Anglais
  • Source : 12th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2016). Proceedings. Édimbourg, United Kingdom, August 21st-24th 2016.
  • Date d'édition : 21/08/2016
  • DOI : http://dx.doi.org/10.18462/iir.gl.2016.1037

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