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Turbo-compressors for R-718: Experimental evaluation of a two-stage steam compression cycle.

Turbocompresseur pour le R-718 : simulation et vérification d’un cycle à compression de vapeur bi-étagé.

Numéro : pap. n. 973

Auteurs : BANTLE M., SCHLEMMINGER C., GABRIELII C., et al.

Résumé

Water (R-718) is a safe and energy-efficient refrigerant. Mechanical vapour recompression (MVR), an open-loop heat pump using R718, can significantly reduce the energy consumption for steam-heated processes like drying, pasteurization, evaporation or distillation. However, the existing compression technology is not cost-efficient, especially in the capacity range from 500 kW to 4 MW. Therefore, a novel two-stage turbo-compressor system, developed for application in industrial superheated steam drying and based on mass-produced automotive turbocharger technology, was developed. Its performance was evaluated in a test facility, showing that it is possible to compress superheated steam from atmospheric pressure up to 3 bar, delivering 300 kW at 133°C, with a COP of 5.9, an isentropic efficiency of 74% and a Carnot efficiency of 48%. With an estimated investment cost of 150 €/kW installed heating capacity, the system clearly has the potential of being a cost-effective solution for heat recovery in steam-heated industrial processes.

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  • Titre original : Turbo-compressors for R-718: Experimental evaluation of a two-stage steam compression cycle.
  • Identifiant de la fiche : 30026504
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0973

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