Theoretical investigation of vapor mass fraction measurement methods for two-phase injection compression

Research output: Contribution to conferencesPaperContributedpeer-review



The economized vapor injection (EVI) method is used to decrease the discharge temperature of scroll compressors and to improve the cycle performance of vapor compression refrigeration systems by directly injecting refrigerant vapor into the compression chamber. In previous studies, the optimal cycle performance for an air conditioning system using EVI was detected during two-phase injection. However, the exact vapor mass fraction could not be measured directly. For further investigations on two-phase injection systems, accurate vapor mass fraction (VMF) measurements need to be conducted. This paper compares different options for the VMF measurement using pure refrigerants or refrigerant mixtures. It focuses on the achievable accuracy of the VMF measurement, based on the propagation of uncertainty.


Original languageEnglish
Number of pages10
Publication statusPublished - 2017


Title10th International Conference on Compressors and their Systems
Conference number10
Duration9 - 13 September 2017
LocationCity, University of London
CountryUnited Kingdom

External IDs

Scopus 85037699890
ORCID /0000-0003-3031-9138/work/161408762



  • vapor injection, measurement, Error analysis, two-phase injection