Energy efficient air to air heat pump operating with R-1234yf

Sorina Mortada (1) , Denis Clodic (1) , Christine Arzano-Daurelle (2)

1 CEP/Paris
2 EDF R&D ENERBAT - Energie dans les Bâtiments et les Territoires

Significant improvements in energy performance of air-to-air heat pumps are the major reason of their introduction in the late '90s for heating buildings in Japan and several European countries. They are installed in multi-dwelling units and in individual houses. Some of them are using variable speed compressors. European existing air-to-air heat pumps are not adapted for the low-energy building requirements. Their heating capacity is relatively higher than the heating demand and their energy efficiency is not sufficient. This paper presents a low-capacity heating system: a mini-heat pump (MHP). The MHP consists of mini-channel heat exchangers for the condenser and evaporator. In order to improve the overall energy efficiency, a recovery air-to-air heat exchanger (RHX) fulfills a significant part of a passive house heating demand. A first prototype of the MHP is realized and series of tests are presented in this paper with two refrigerants: R-134a and R-1234yf.

Mots clés: Air to air heat pump; R-1234yf; energy efficiency

Domaines: Sciences de l'ingénieur [physics]; Energétique

Sorina Mortada, Denis Clodic, Christine Arzano-Daurelle. Energy efficient air to air heat pump operating with R-1234yf. 10th International Energy Agency Heat Pump Conference 2011 - HPC 2011, May 2011, Tokyo, Japan. 8 p. ⟨hal-00770147⟩