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Évaluation expérimentale du mélange azéotrope R516A en tant que solution de remplacement immédiat du R134a pour les pompes à chaleur à température modérément élevée.

Experimental evaluation of the azeotropic mixture R516A as an R134a drop-in alternative for moderately high-temperature heat pumps.

Numéro : 244

Auteurs : SHAKER AL-SAYYAB A. K., MOTA BABILONI A., BARRAGÁN-CERVERA A., NAVARRO-ESBRÍ J.

Résumé

The moderately high-temperature heat pump (MHTHP) is a market with a great potential to reduce greenhouse gas emissions from the heating sector. However, future proof MHTHPs cannot be based on hydrofluorocarbons with high global warming potential (GWP). Fourth-generation refrigerants with GWP below 150 are required. This work experimentally investigates the new azeotropic mixture R516A as a drop-in alternative to R134a, with a low GWP (142). Measurements are taken from a test rig at different steady-state operating conditions. The evaporating temperature is 7.5 ºC, 15 ºC and 22.5 ºC, and condensing temperature varies between 55 ºC and 75 ºC, at steps of 5 ºC. R516A presents a lower discharge temperature (average reduction of 7 ºC), which provides a safer operation for the compressor and increases its lifespan. R516A heating capacity reduction is 13.5% on average, with a reduced heating effect and comparable compressor power consumption. R516A shows a 12% COP reduction at higher evaporating temperatures.

Documents disponibles

Format PDF

Pages : 6

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 : Experimental evaluation of the azeotropic mixture R516A as an R134a drop-in alternative for moderately high-temperature heat pumps.
  • Identifiant de la fiche : 30030546
  • Langues : Anglais
  • Source : XI Congreso Ibérico y IX Congreso Iberoamericano de Ciencias y Técnicas del Frío, CYTEF 2022.
  • Date d'édition : 04/2022

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