Partager

Document IIF

Amélioration importante du rapport de performance énergétique saisonnière et du COP obtenue en contrôlant un refroidisseur à détente directe à très faible charge à l'aide d'un capteur de qualité de la vapeur.

Large SEPR and COP improvement obtained by controlling an ultra-low-charge DX chiller using a vapor quality sensor.

Numéro : 1138

Auteurs : KUDSK H., KACIC O., DENECKE J., TRAUER M., ELSTROM M.

Résumé

Most energy efficient chillers are designed as thermosyphon systems, which requires recirculation and an elevated liquid separator to secure refrigerant circulation. The separator increases the cost and refrigerant charge compared to a DX (direct expansion) system design.
Normally DX systems have poor efficiency, but this paper shows how much the efficiency can be improved by replacing the superheat-based control with a vapor quality-based control. This makes it possible to fulfil the EU Ecodesign requirements.
The tests are done on a high temperature process chiller (7/12 °C) according to EC 2016/2281 with 4 kg R717 and a dual control system. SEPR values are compared to the standard for the two control systems and the COP is compared during part load and it shows a 51 % improvement.
The annual energy consumption is reduced by 28 MWh equal to 3350 € or around the same magnitude as the complete chiller price after 10 years.

Documents disponibles

Large SEPR and COP improvement obtained by controlling an ultra-low-charge DX chiller using a vapor quality sensor

Pages : 6

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 : Large SEPR and COP improvement obtained by controlling an ultra-low-charge DX chiller using a vapor quality sensor.
  • Identifiant de la fiche : 30027952
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
  • Date d'édition : 07/12/2020
  • DOI : http://dx.doi.org/10.18462/iir.gl.2020.1138

Liens


Voir d'autres communications du même compte rendu (120)
Voir le compte rendu de la conférence

Indexation