Motive flow calculation through ejectors for transcritical CO

G. Boccardi, G. Lillo, R. Mastrullo, A.W. Mauro, M. Pieve, R. Trinchieri

Research output: Contribution to conferencePaper


The revival of CO2as refrigerant is due to new restrictions in the use of current refrigerants in developed countries, as consequence of environmental policy agreements. An optimal design of each part is necessary to overcome the possible penalty in performance, and the use of ejectors instead of throttling valves can improve the performance. Especially for applications as CO2HPs for space heating, the use of ejectors has been little investigated. The data collected in a cooperation project between ENEA (C.R. Casaccia) and Federico II University of Naples have been used to experimentally characterize several ejectors in terms of motive mass flow rate, both in transcritical CO2conditions and not. A statistical comparison is presented in order to assess the reliability of predictive methods available in the open literature for choked flow conditions.
Original languageEnglish
Publication statusPublished - 9 Mar 2017
Event34th UIT Heat Transfer Conference 2016 - Ferrara, Italy
Duration: 9 Mar 2017 → …


Conference34th UIT Heat Transfer Conference 2016
Period9/3/17 → …


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Boccardi, G., Lillo, G., Mastrullo, R., Mauro, A. W., Pieve, M., & Trinchieri, R. (2017). Motive flow calculation through ejectors for transcritical CO. Paper presented at 34th UIT Heat Transfer Conference 2016, Ferrara, Italy.