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Évaluation thermodynamique de pompes à chaleur à température élevée utilisant des frigorigènes HFO à faible GWP pour la récupération de chaleur.

Thermodynamic assessment of high-temperature heat pumps using Low-GWP HFO refrigerants for heat recovery.

Auteurs : KONDOU C., KOYAMA S.

Type d'article : Article, Article de la RIF

Résumé

Reducing energy consumption by utilizing heat recovery systems has become increasingly important in industry. This paper presents an exploratory assessment of heat pump type heat recovery systems using environmentally friendly refrigerants. The coefficient of performance (COP) of 4 cycle configurations used to raise the temperature of heat media to 160 °C with a waste heat at 80 °C is calculated and compared for refrigerants R717, R365mfc, R1234ze(E), and R1234ze(Z). A multiple-stage “extraction” cycle drastically reduces the throttling loss and exergy loss in the condensers, resulting in the highest COP for R1234ze(Z). A cascade cycle using R1234ze(Z) and R365mfc has a relatively high COP and provides practical benefits. Even under adverse conditions, the primary energy efficiency is greater than 1.3 when the transmission end efficiency of the electric power generation is 0.37. The assessment demonstrated that high-temperature heat pumps are a promising approach for reducing primary energy consumption for industrial applications.

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Format PDF

Pages : 126-141

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 : Thermodynamic assessment of high-temperature heat pumps using Low-GWP HFO refrigerants for heat recovery.
  • Identifiant de la fiche : 30014152
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 53
  • Date d'édition : 05/2015

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