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Performance evaluation of heat pump system using R32 and HFO-mixed refrigerant in high ambient temperature.

Évaluation de la performance d’un système de pompe à chaleur fonctionnant au R32 et avec un mélange de frigorigènes à base de HFO à haute température ambiante.

Numéro : pap. 2408

Auteurs : TAIRA S., MINAMIDA T., HAIKAWA T., et al.


R32 was selected as the alternative for R410A for mini-split air-conditioners/heat pumps and have already phased out R410A in residential market in Japan. Recently several new alternatives for R410A have been proposed in order to achieve more close capacity to R410A and mitigate high discharge temperature issue of R32 as well as to reduce energy consumption. We selected R32 from among the candidates a few years ago; however it is important to continue comparing it to new candidates in search for an even better choice. We carried out performance evaluation for the lower GWP refrigerant R32/R125/R1234yf (67/7/26) and R32. We also conducted the experiments in cooling operation in high ambient temperature. As the result, we found that the COP of R32 is superior to the blend because of its latent heat characteristic. In particular, as condensing temperature increases such as in high ambient temperature operation, latent heat of the blend obtains even smaller. Therefore, advantage of R32 in COP becomes more significant in high ambient condition. From the above, we consider that R32 is still the best refrigerant at present. However, we will continue investigation in search for a better refrigerant.

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Format PDF

Pages : 10


  • Prix public

    20 €

  • Prix membre*

    15 €

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  • Titre original : Performance evaluation of heat pump system using R32 and HFO-mixed refrigerant in high ambient temperature.
  • Identifiant de la fiche : 30018948
  • Langues : Anglais
  • Source : 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 11/07/2016


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